Foldable electronic equipment

Abstract

The embodiment of the invention provides foldable electronic equipment. The foldable electronic equipment comprises an antenna. The antenna uses a first frame and a second frame arranged in the foldable electronic equipment as radiators. A part of the first frame serves as a feed branch, and a part of the second frame serves as a parasitic branch. By arranging the breaking joint on the parasitic branch knot, the radiation aperture of the parasitic branch knot is increased to improve the radiation characteristic of the antenna, so that the electronic equipment has better communication performance.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to a foldable electronic device. Background Art

[0002] With the rapid development of wireless communication technology, the second generation (2G) mobile communication system mainly supports the call function in the past. Electronic devices are only tools for people to send and receive text messages and voice communication. The wireless Internet access function is extremely slow because data transmission uses voice channels. Nowadays, in addition to calls, text messages, and photos, electronic devices can also be used to listen to music online, watch online videos, and real-time videos, covering various applications in people's lives such as calls, film and television entertainment, and e-commerce. Among these, many functional applications require wireless networks to upload and download data. Therefore, high-speed data transmission has become extremely important.

[0003] As people's demand for high-speed data transmission increases, the development trend of industrial design (ID) of electronic devices is large screen ratio and multiple cameras. This has caused a significant reduction in antenna clearance and increasingly limited layout space. However, this is in conflict with the characteristics of the antenna itself as an open system, which restricts the performance of the antenna. Summary of the invention

[0004] An embodiment of the present application provides a foldable electronic device, including an antenna. The antenna uses the first frame and the second frame of the foldable electronic device as radiators. Part of the frame of the first frame is used as a radiation branch (a branch into which the signal is fed from the feeding point), and part of the frame of the second frame is used as a parasitic branch (a branch that couples the signal by coupling the main radiation branch). By providing a break in the parasitic branch, the radiation aperture of the antenna is increased to improve the radiation characteristics of the antenna.

[0005] In a first aspect, a foldable electronic device is provided, comprising: a first shell, a second shell and a floor, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame is at least partially spaced apart from the floor, and the second frame is at least partially spaced apart from the floor; the first frame comprises a first position and a second position, the first frame is coupled to the floor or provided with a first gap at the first position, and the first frame is coupled to the floor or provided with a second gap at the second position; the second frame comprises a third position and a fourth position, the second frame is coupled to the floor at the third position, and the second frame is provided with a third gap at the fourth position; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; and an antenna, the antenna comprising: a first radiator and a first feeding circuit, the first radiator is a first frame at the A conductive part between a first position and a second position, the first radiator includes a first feeding point, the first feeding circuit is coupled to the first feeding point, a second radiator and a first element, the second radiator is a conductive part of the second frame between the third position and the fourth position, and the length of the second radiator is less than or equal to three times the length of the first radiator; wherein the second radiator includes a first coupling point and a second coupling point, the second radiator is provided with a fourth gap between the first coupling point and the second coupling point, the first end of the first element is coupled to the first coupling point, and the second end of the first element is coupled to the second coupling point; wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator and the first element are used to generate a first parasitic resonance, and the first direction is the thickness direction of the foldable electronic device.

[0006] According to the embodiment of the present application, a fourth gap is provided between the first coupling point and the second coupling point, and the first element is coupled and connected (the first element can be used to determine the equivalent capacitance value of the fourth gap), so that the radiation aperture of the second radiator can be increased. Since the radiation aperture of the second radiator is increased, the intensity of a single current strong point of the second radiator can be reduced, so that the current is more evenly distributed, and the conductor loss and dielectric loss caused by the conductor and dielectric arranged around the second radiator and the second radiator are reduced, thereby improving the system efficiency and radiation efficiency of the antenna.

[0007] In combination with the first aspect, in some implementations of the first aspect, the antenna also includes a second element; the second radiator includes the third coupling point, the first end of the second element is coupled to the third coupling point, and the second end of the second element is coupled to the floor; the second radiator, the first element, and the second element are used to generate the first parasitic resonance.

[0008] According to the embodiment of the present application, in the technical solution provided by the embodiment of the present application, the second radiator is coupled to the floor through an element at the third coupling point, which can increase the radiation aperture of the second radiator. Since the radiation aperture of the second radiator is increased, the intensity of a single current strong point of the second radiator can be reduced, so that the current is more evenly distributed, and the conductor loss and dielectric loss caused by the second radiator and the conductor and dielectric arranged around the second radiator are reduced, thereby improving the system efficiency and radiation efficiency of the antenna.

[0009] In combination with the first aspect, in some implementations of the first aspect, a length of the second radiator between the third position and the fourth slot is smaller than a length of the second radiator between the third slot and the fourth slot.

[0010] According to an embodiment of the present application, since the second frame is coupled to the floor at the third position, the current of the second radiator is stronger near the third position, and the current is weaker near the fourth position. When the fourth gap is provided in an area with stronger current, the effect of reducing the intensity of a single strong current point of the second radiator is more obvious, and the current distribution of the second radiator is relatively more uniform. Since the current distribution of the second radiator is relatively more uniform, the conductor loss and dielectric loss caused by the conductor and dielectric arranged around the second radiator are smaller. In one embodiment, the current distribution of the second radiator is relatively more uniform, the radiation aperture of the second radiator is improved more significantly, and the effect of improving the system efficiency and radiation efficiency of the antenna is better.

[0011] In combination with the first aspect, in some implementations of the first aspect, an equivalent inductance value of the second element is less than or equal to 10 nH.

[0012] In combination with the first aspect, in some implementations of the first aspect, the first coupling point is located between the third position and the fourth gap, and the second coupling point is located between the fourth position and the fourth gap; the third coupling point is located between the third position and the first coupling point, and the distance between the first coupling point and the third coupling point is greater than or equal to 0 mm and less than or equal to 5 mm; or, the third coupling point is located between the fourth position and the second coupling point, and the distance between the second coupling point and the third coupling point is greater than or equal to 0 mm and less than or equal to 5 mm.

[0013] According to an embodiment of the present application, when the distance between the third coupling point and the first coupling point is equal to 0 mm, the third coupling point coincides with the first coupling point. In one embodiment, the first end of the first element and the first end of the second element can be coupled to the first coupling point (third coupling point) through the same connector.

[0014] The third coupling point may be located between the third position and the first coupling point, and the second element may be an inductor, which may further increase the radiation aperture of the second radiator. It should be understood that when the third coupling point is located between the third position and the first coupling point, the first element and the second element are similar to a series connection.

[0015] In one embodiment, when the third coupling point is located between the third position and the first coupling point, the second element can be a capacitor, which can be used to reduce the radiation aperture of the second radiator. The radiation aperture of the second radiator is adjusted at the same time through the first element and the second element to achieve parasitic resonance in the desired frequency band.

[0016] When the distance between the third coupling point and the second coupling point is equal to 0 mm, the third coupling point coincides with the second coupling point. In one embodiment, the second end of the first element and the first end of the second element can be coupled to the second coupling point (third coupling point) through the same connector.

[0017] The third coupling point can be located between the fourth position and the second coupling point, and the second element can be a capacitor, which can improve the equivalent capacitance between the first coupling point and the third coupling point. It should be understood that when the third coupling point is located between the fourth position and the second coupling point, the first element and the second element are similar to a parallel relationship. In one embodiment, when the equivalent capacitance value of the first element is 2pF, the loss is high, and the second element can be used to ensure the same effect (for example, the same radiation aperture) (the equivalent capacitance value of the first element is 1pF, the equivalent capacitance value of the second element is 1pF, and the equivalent capacitance value between the first coupling point and the third coupling point is 2pF) to reduce the loss, thereby improving the radiation characteristics of the antenna.

[0018] In one embodiment, when the third coupling point is located between the fourth position and the second coupling point, the second element may be an inductor, which can be used to reduce the radiation aperture of the second radiator. The radiation aperture of the second radiator is adjusted simultaneously through the first element and the second element to achieve parasitic resonance in the desired frequency band.

[0019] In combination with the first aspect, in some implementations of the first aspect, a width of the fourth gap is greater than or equal to 0.1 mm and less than or equal to 2 mm.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the distance between the first coupling point and the fourth gap is less than or equal to 5 mm, and / or the distance between the second coupling point and the fourth gap is less than or equal to 5 mm.

[0021] In combination with the first aspect, in certain implementations of the first aspect, the first frame is coupled to the floor at the first position, and the first frame is provided with a second gap at the second position; wherein, based on the foldable electronic device being in a folded state, the second gap is aligned with the third gap or the fourth gap in the first direction.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the equivalent capacitance value of the first element is less than or equal to a first threshold; when the resonance point frequency of the first parasitic resonance is less than or equal to 1 GHz, the first threshold is 10 pF; when the resonance point frequency of the first parasitic resonance is greater than 1 GHz, the first threshold is 2 pF.

[0023] In combination with the first aspect, in some implementations of the first aspect, the electrical length of the second radiator is greater than three eighths of a first wavelength, and the first wavelength is a wavelength corresponding to the first parasitic resonance.

[0024] According to an embodiment of the present application, the first end of the second radiator is a grounded end, and the second end is an open end. The first parasitic resonance of the second radiator may correspond to a quarter-wavelength mode. Through the second element and the fourth gap, the electrical length of the second radiator may be greater than three-eighths of the first wavelength, the current on the second radiator is in the same direction (not reversed), and the electric field between the second radiator and the floor is not reversed. The electrical length of the second radiator increases from a quarter of the first wavelength to more than three-eighths of the first wavelength, but still operates in a quarter-wavelength mode. In this case, the current density on the second radiator 240 is dispersed, and the current density between the second radiator and the floor is weakened, thereby reducing the loss caused by the radiator and the conductor and dielectric arranged around the radiator, thereby improving the radiation characteristics of the antenna.

[0025] In combination with the first aspect, in some implementations of the first aspect, a length of the second radiator is greater than or equal to 0.8 times a length of the first radiator.

[0026] In combination with the first aspect, in some implementations of the first aspect, the length of the second radiator is greater than or equal to 1.5 times the length of the first radiator, and less than or equal to 2.5 times the length of the first radiator.

[0027] In combination with the first aspect, in some implementations of the first aspect, a frequency difference between a resonance point of the first parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

[0028] In combination with the first aspect, in some implementations of the first aspect, the first frame is coupled to the floor at the first position, and the first frame is provided with the second gap at the second position.

[0029] According to the embodiment of the present application, when one of the first end and the second end of the first radiator is a grounded end and the other end is an open end, and the currents on the first radiator are in the same direction, it can be considered that the first radiator operates in a quarter mode, wherein the current at the grounded end of the first radiator is stronger and the electric field at the open end of the first radiator is stronger.

[0030] In combination with the first aspect, in certain implementations of the first aspect, the first frame includes a fifth position and a sixth position, the second position is located between the fifth position and the first position, the fifth position is located between the second position and the sixth position, the first frame is coupled to the floor at the first position and the fifth position, and the first frame is provided with a second gap and a fifth gap at the second position and the sixth position, respectively; the antenna includes a third radiator and a second feeding circuit, the third radiator is a conductive part of the first frame between the fifth position and the sixth position, the third radiator includes the second feeding point, and the second feeding circuit is coupled to the second feeding point.

[0031] In combination with the first aspect, in certain implementations of the first aspect, the first frame includes a fifth position and a sixth position, the second position is located between the fifth position and the first position, the fifth position is located between the second position and the sixth position, the first frame is coupled to the floor at the first position and the fifth position, and the first frame is provided with a second gap and a fifth gap at the second position and the sixth position, respectively; the antenna includes a third radiator and a second feeding circuit, the third radiator is a conductive part of the first frame between the second position and the sixth position, the third radiator includes the second feeding point, and the second feeding circuit is coupled to the second feeding point.

[0032] According to an embodiment of the present application, the first radiator and the first feeding circuit can form a first antenna unit. The third radiator and the second feeding circuit can form a second antenna unit. The second radiator can simultaneously serve as a parasitic branch of the first antenna unit and the second antenna unit, and is used to improve the radiation characteristics of the first antenna unit and the second antenna unit. In addition, since the first antenna unit and the second antenna unit can reuse the second radiator, the overall structure of the antenna can be miniaturized while simultaneously improving the radiation characteristics of the first antenna unit and the second antenna unit.

[0033] In combination with the first aspect, in certain implementations of the first aspect, the antenna includes a third element; the third radiator also includes a fourth coupling point, the second feeding point is located between the fifth position and the sixth position, the fourth coupling point is located between the second position and the fifth position, the first end of the third element is coupled to the fourth coupling point, and the second end of the third element is coupled to the floor.

[0034] In combination with the first aspect, in some implementations of the first aspect, the foldable electronic device further includes a third shell, the third shell includes a third frame, and the third frame is at least partially spaced apart from the floor, wherein the third frame includes a fifth position and a sixth position, the third frame is coupled to the floor or provided with a fifth gap at the fifth position, and the third frame is coupled to the floor or provided with a sixth gap at the sixth position; the foldable electronic device further includes a second rotating shaft, the second rotating shaft is located between the first shell and the third shell, and the second rotating shaft is rotatably connected to the first shell and the third shell respectively; the antenna includes a third radiator and a second feeding circuit, the third radiator is a conductive part of the first frame between the fifth position and the sixth position, the third radiator includes the second feeding point, and the second feeding circuit is coupled to the second feeding point; based on the foldable electronic device being in a folded state, the third radiator and the second radiator at least partially overlap along the first direction.

[0035] In combination with the first aspect, in certain implementations of the first aspect, the first frame is provided with a first gap at the first position, and the first frame is provided with a second gap at the second position; the third frame is coupled to the floor at the fifth position, and the third frame is provided with a sixth gap at the sixth position; the first frame also includes a first grounding point, the first grounding point is located between the first position and the second position, and the first frame is coupled to the floor at the first grounding point.

[0036] In combination with the first aspect, in certain implementations of the first aspect, the antenna includes a third element; the first radiator also includes a fourth coupling point, the first feeding point is located between the first grounding point and the second position, the fourth coupling point is located between the first position and the first grounding point, the first end of the third element is coupled to the fourth coupling point, and the second end of the third element is coupled to the floor.

[0037] In combination with the first aspect, in certain implementations of the first aspect, the first frame is provided with a first gap at the first position, and the first frame is provided with a second gap at the second position; the third frame is provided with a fifth gap at the fifth position, and the third frame is provided with a sixth gap at the sixth position; the first frame also includes a first grounding point, the first grounding point is located between the first position and the second position, and the first frame is coupled to the floor at the first grounding point; the third frame also includes a second grounding point, the second grounding point is located between the fifth position and the sixth position, and the third frame is coupled to the floor at the grounding point.

[0038] In combination with the first aspect, in some implementations of the first aspect, the antenna includes a first tuning device and a second tuning device; the third radiator also includes a fourth coupling point and a fifth coupling point, the fourth coupling point is located between the fifth position and the sixth position, and the fifth coupling point is located between the second position and the fifth position; the first end of the first tuning device is coupled to the fourth coupling point, the second end of the first tuning device is coupled to the floor, the first end of the second tuning device is coupled to the fifth coupling point, and the second end of the second tuning device is coupled to the floor.

[0039] In combination with the first aspect, in some implementations of the first aspect, based on the foldable electronic device being in a folded state, the first radiator and the third radiator at least partially overlap along the first direction.

[0040] In combination with the first aspect, in some implementations of the first aspect, based on the foldable electronic device being in a folded state, the first radiator and the third radiator are completely non-overlapping along the first direction.

[0041] In combination with the first aspect, in some implementations of the first aspect, the third radiator is used to generate a second resonance, and a frequency difference between a resonance point of the first parasitic resonance and a resonance point of the second resonance is less than or equal to 200 MHz.

[0042] In combination with the first aspect, in some implementations of the first aspect, the third radiator is used to generate a second resonance, and a resonance frequency band of the first resonance is the same frequency or adjacent to a resonance frequency band of the second resonance.

[0043] In combination with the first aspect, in some implementations of the first aspect, the foldable electronic device also includes a third shell, the third shell includes a third frame, and the third frame is at least partially spaced apart from the floor, wherein the third frame includes a fifth position and a sixth position, the third frame is coupled to the floor at the fifth position, and the third frame is provided with a fifth gap at the sixth position; the foldable electronic device also includes a second rotating shaft, the second rotating shaft is located between the second shell and the third shell, and the second rotating shaft is rotatably connected to the first shell and the third shell respectively; the antenna includes a third radiator, and the third radiator is a conductive part of the third frame between the fifth position and the sixth position; based on the foldable electronic device being in a folded state, the third radiator and the first radiator at least partially overlap along the first direction.

[0044] According to the embodiment of the present application, the second radiator and the third radiator as parasitic branches are respectively located on different shells, and at least partially overlap with the first radiator as the main radiation branch in the first direction, generating resonance by indirect coupling.

[0045] In combination with the first aspect, in certain implementations of the first aspect, the antenna includes a fourth element; the third radiator also includes a fifth coupling point and a sixth coupling point, the third radiator is provided with a sixth gap between the fifth coupling point and the sixth coupling point, the first end of the fourth element is coupled to the fifth coupling point, and the second end of the fourth element is coupled to the sixth coupling point.

[0046] In combination with the first aspect, in certain implementations of the first aspect, the second frame includes a fifth position and a sixth position, the fourth position is located between the fifth position and the third position, the fifth position is located between the fourth position and the sixth position, the second frame is coupled to the floor at the fifth position, and the second frame is provided with a sixth gap at the sixth position; the antenna includes a third radiator and a fourth element, the third radiator is a conductive part of the second frame between the fifth position and the sixth position, the third radiator and the first radiator do not overlap along the first direction, the second radiator includes a seventh coupling point, the third radiator includes an eighth coupling point, the first end of the fourth element is coupled to the seventh coupling point, and the second end of the fourth element is coupled to the eighth coupling point.

[0047] According to an embodiment of the present application, the second radiator and the third radiator are respectively located on the same housing, and the second radiator generates resonance by indirect coupling. The third radiator is coupled to the seventh coupling point of the second radiator through the eighth coupling point, and is indirectly coupled with the second radiator, thereby generating resonance.

[0048] In a second aspect, a foldable electronic device is provided, comprising: a first shell, a second shell and a floor, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame is at least partially spaced from the floor, and the second frame is at least partially spaced from the floor; the first frame comprises a first position and a second position, the first frame is coupled to the floor or provided with a first gap at the first position, and the first frame is coupled to the floor or provided with a second gap at the second position; the second frame comprises a third position, a fourth position and a fifth position, the fifth position is located between the third position and the fourth position, the second frame is coupled to the floor at the third position and the fourth position, and the second frame is provided with a third gap at the fifth position; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; and an antenna, the antenna comprising: a first radiator and a first feeding circuit, the first radiator is a conductive part of the first frame between the first position and the second position, the first radiator comprises a first feeding point, the first feeding circuit is coupled to the first feeding point, a second radiator and a first element, a second element, the second radiator is a conductive part of the second frame at the first position The conductive portion between the third position and the fourth position, the second radiator is less than or equal to three times the length of the first radiator; wherein the second radiator includes a first coupling point and a second coupling point, and a third coupling point and a fourth coupling point, the first coupling point and the second coupling point are located between the third position and the fifth position, the third coupling point and the fourth coupling point are located between the fourth position and the fifth position, the second radiator is provided with a fourth gap between the first coupling point and the second coupling point, the second radiator is provided with a fifth gap between the third coupling point and the fourth coupling point, the first end of the first element is connected to the first end of the first element A coupling point is configured so that the second end of the first element is coupled to the second coupling point, the first end of the second element is coupled to the third coupling point, and the second end of the second element is coupled to the fourth coupling point; wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator and the first element and the second element are used to generate a first parasitic resonance, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz, and the first direction is the thickness direction of the foldable electronic device.

[0049] According to a third aspect, a foldable electronic device is provided, comprising: a first shell, a second shell and a floor, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame is at least partially spaced apart from the floor, and the second frame is at least partially spaced apart from the floor; the first frame comprises a first position and a second position, the first frame is coupled to the floor or provided with a first gap at the first position, and the first frame is coupled to the floor or provided with a second gap at the second position; the second frame comprises a third position, a fourth position and a fifth position, the fifth position is located between the third position and the fourth position, and the second frame is located at the third position The third position and the fourth position are respectively provided with a third gap and a fourth gap, and the second frame is coupled to the floor at the fifth position; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; and an antenna, the antenna comprising: a first radiator and a first feeding circuit, the first radiator is a conductive part of the first frame between the first position and the second position, the first radiator comprises a first feeding point, the first feeding circuit is coupled to the first feeding point, a second radiator and a first element, a second element, the second radiator is the conductive part of the second frame at the third position and the second position The conductive part between the first and the fourth positions, the length of the second radiator is greater than or equal to the length of the first radiator, and less than or equal to three times the length of the first radiator; wherein the second radiator includes a first coupling point and a second coupling point, and a third coupling point and a fourth coupling point, the first coupling point and the second coupling point are located between the third position and the fifth position, the third coupling point and the fourth coupling point are located between the fourth position and the fifth position, the second radiator is provided with a fifth gap between the first coupling point and the second coupling point, the second radiator is provided with a sixth gap between the third coupling point and the fourth coupling point, and the first element is provided with a sixth gap between the third coupling point and the fourth coupling point. One end is coupled with the first coupling point, the second end of the first element is coupled with the second coupling point, the first end of the second element is coupled with the third coupling point, and the second end of the second element is coupled with the fourth coupling point; wherein, based on the fact that the foldable electronic device is in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator and the first element, the second element are used to generate a first parasitic resonance, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz, and the first direction is the thickness direction of the foldable electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1It is a schematic structural diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0051] Figure 2 It is a schematic structural diagram of the foldable electronic device 100 in the outward folded state.

[0052] Figure 3 is a schematic structural diagram of the foldable electronic device 100 in a possible unfolded state.

[0053] Figure 4 is a schematic structural diagram of the foldable electronic device 100 in a possible folded state.

[0054] Figure 5 is a schematic structural diagram of the foldable electronic device 100 in a possible partially unfolded state.

[0055] Figure 6 This is a schematic diagram of the structure of a line common mode and the corresponding current and electric field distribution provided by the present application.

[0056] Figure 7 This is a schematic diagram of the structure of a line differential mode and the corresponding current and electric field distribution provided by the present application.

[0057] Figure 8 This is the structure of the slot common mode provided by this application and the corresponding distribution diagram of current, electric field and magnetic current.

[0058] Fig. 9 This is the structure of the slot differential mode provided by the present application and the corresponding distribution diagram of current, electric field and magnetic current.

[0059] Fig.10 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0060] Fig.11 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0061] Fig.12 It is a schematic diagram of a distributed device provided in an embodiment of the present application.

[0062] Fig.13 It is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0063] Fig.14 yes Fig.11 and Fig.13 S-parameter simulation results of the antenna shown.

[0064] Fig.15 yes Fig.11 and Fig.13Simulation results for the radiation efficiency and system efficiency of the antenna shown.

[0065] Fig.16 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0066] Fig.17 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0067] Fig.18 yes Fig.17 S-parameter simulation results of the antenna shown.

[0068] Fig.19 yes Fig.17 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown.

[0069] Fig. 20 yes Fig.17 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0070] Fig.21 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0071] Fig. 22 yes Fig.21 S-parameter simulation results of the antenna shown.

[0072] Fig.23 yes Fig.21 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown.

[0073] Fig.24 yes Fig.21 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0074] Fig.25 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0075] Fig.26 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0076] Fig. 27 yes Fig.25 S-parameter simulation results of the antenna shown.

[0077] Fig.28 yes Fig.25 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown.

[0078] Fig.29 yes Fig.25 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0079] Fig.30 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0080] Fig.31 yes Fig.30 S-parameter simulation results of the antenna shown.

[0081] Fig.32 yes Fig.30 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown.

[0082] Fig.33 yes Fig.30 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0083] Fig.34 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0084] Fig.35 yes Fig.34 S-parameter simulation results of the antenna shown.

[0085] Fig.36 yes Fig.34 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown.

[0086] Fig.37 yes Fig.34 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0087] Fig.38 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0088] Fig.39 yes Fig.38 S-parameter simulation results of the antenna shown.

[0089] Fig.40 yes Fig.38 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown.

[0090] Fig.41 yes Fig.38 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0091] Fig.42 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0092] Fig.43 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0093] Fig.44 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0094] Fig.45 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0095] Fig.46 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0096] Fig.47 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0097] Fig.48 yes Fig.47 S-parameter simulation results of the antenna shown.

[0098] Fig.49 yes Fig.47 Simulation results for the radiation efficiency and system efficiency of the antenna shown.

[0099] Fig.50 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0100] Fig.51 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0101] Fig.52 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0102] The following explains the terms that may appear in the embodiments of the present application.

[0103] It should be understood that the term "and / or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0104] When used in this application, “within the range of…”, unless it is separately specified that an end value is not included, it is assumed that both end values ​​of the range are included. For example, in the range of 1 to 5, the two values ​​1 and 5 are included.

[0105] Coupling: can be understood as direct coupling and / or indirect coupling, "coupling connection" or "coupling" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an airless / non-contact manner. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by coupling between the gaps between two conductive parts to form an equivalent capacitor.

[0106] Component / device: includes at least one of lumped component / device and distributed component / device.

[0107] Lumped components / devices: refers to the collective name for all components when the size of the component is much smaller than the wavelength relative to the circuit operating frequency. For the signal, regardless of any time, the component characteristics always remain fixed and are independent of frequency. Lumped components / devices can include lumped capacitors, lumped inductors, etc.

[0108] Distributed components / devices: Different from lumped components, when a signal passes through a component, the characteristics of each point of the component itself will vary due to the change of the signal. At this time, the component as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed component. Distributed components / devices can include distributed capacitance, distributed inductance, etc.

[0109] Capacitance: It can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance includes capacitive components, such as capacitors; distributed capacitance (or distributed capacitance) includes the equivalent capacitance formed by two conductive parts separated by a certain gap.

[0110] Inductance: It can be understood as lumped inductance and / or distributed inductance. Lumped inductance includes inductive components, such as inductors; distributed inductance (or distributed inductance) includes equivalent inductance formed by a certain length of conductive parts.

[0111] Radiator: It is a device in the antenna used to receive / send electromagnetic wave radiation. In some cases, the "antenna" in a narrow sense is understood as a radiator, which converts the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy, which is used to radiate and receive radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, and is converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. The receiving radiator converts a certain polarized electromagnetic wave energy from a specific direction in space into modulated high-frequency current energy, which is transmitted to the receiver input via the feeder line.

[0112] The radiator may include a conductor with a specific shape and size, such as a linear or sheet shape, etc., and the present application does not limit the specific shape. In one embodiment, the linear radiator may be referred to as a linear antenna. In one embodiment, the linear radiator may be implemented by a conductive frame, and may also be referred to as a frame antenna. In one embodiment, the linear radiator may be implemented by a bracket conductor, and may also be referred to as a bracket antenna. In one embodiment, the linear radiator, or the radiator of the linear antenna, has a wire diameter (e.g., including thickness and width) much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of linear antennas include dipole antennas, half-wave dipole antennas, monopole antennas, loop antennas, and inverted F antennas (also known as IFA, Inverted F Antenna). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feeding unit from the feeding end of the radiating branch. For example, an inverted-F antenna (IFA) can be regarded as a monopole antenna with a ground path added. The IFA antenna has a feeding point and a grounding point, and is called an inverted-F antenna because its side view is an inverted F shape. In one embodiment, the sheet radiator may include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also known as PIFA, Planar Inverted FAntenna). In one embodiment, the sheet radiator may be implemented by a planar conductor (such as a conductive sheet or a conductive coating, etc.). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet, etc. In one embodiment, the sheet radiator may include a conductive coating, such as a silver paste, etc. The shape of the sheet radiator includes a circle, a rectangle, a ring, etc., and the present application does not limit the specific shape. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator and a floor, wherein the dielectric substrate is arranged between the radiator and the floor.

[0113] The radiator may also include a slot or a slit formed on the conductor, for example, a closed or semi-closed slot or slit formed on a grounded conductor surface. In one embodiment, a slotted or slitted radiator may be referred to as a slot antenna or a slot antenna. In one embodiment, the radial dimension (e.g., including the width) of the slot or slit of the slot antenna / slot antenna is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length dimension may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, a radiator with a closed slot or slit may be referred to as a closed slot antenna. In one embodiment, a radiator with a semi-closed slot or slit (e.g., an opening is added to a closed slot or slit) may be referred to as an open slot antenna. In some embodiments, the slot shape is a long strip. In some embodiments, the length of the slot is about half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the slot is about an integer multiple of the wavelength (e.g., one times the dielectric wavelength). In some embodiments, the slot can be fed by a transmission line connected across one or both sides thereof, thereby exciting a radio frequency electromagnetic field on the slot and radiating electromagnetic waves into space. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a conductive frame with both ends grounded, which can also be called a frame antenna; in this embodiment, it can be regarded as that the slot antenna or slot antenna includes a linear radiator, which is spaced apart from the floor and grounded at both ends of the radiator, thereby forming a closed or semi-closed slot or slot. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a bracket conductor with both ends grounded, which can also be called a bracket antenna.

[0114] The feed circuit / feed structure is a combination of all components of an antenna for the purpose of receiving and transmitting radio frequency waves. In the case of a receiving antenna, the feed circuit can be considered as the part of the antenna from the first amplifier to the front-end transmitter. In a transmitting antenna, the feed circuit can be considered as the part after the last power amplifier. In some cases, the "feed circuit" is understood in a narrow sense as the RF chip, or the transmission path from the RF chip to the radiator or the feeding point on the transmission line. The feed circuit has the function of converting radio waves into electrical signals and sending them to the receiver component. Generally, it is considered to be the part of the antenna that converts radio waves into electrical signals and vice versa. The antenna should be designed with maximum power transfer possibility and efficiency in mind. To do this, the antenna feed impedance must be matched with the load resistance. The antenna feed impedance is a combination of resistance, capacitance and inductance. To ensure maximum power transfer conditions, the two impedances (load resistance and feed impedance) should be matched. Matching can be done by considering the frequency requirements and the design parameters of the antenna, such as gain, directivity and radiation efficiency.

[0115] End / point: The "end / point" in the first end / second end / feeding end / grounding end / feeding point / grounding point / coupling point of the antenna radiator cannot be narrowly understood as an end point or end portion that is physically disconnected from other radiators, but can also be considered as a point or a section on a continuous radiator. In one embodiment, the "end / point" may include a connection / coupling area on the antenna radiator that is coupled to other conductive structures. For example, the feed end / feeding point may be a coupling area on the antenna radiator that is coupled to a feed structure or a feed circuit (for example, an area facing a portion of the feed circuit). For another example, the ground end / grounding point may be a connection / coupling area on the antenna radiator that is coupled to a ground structure or a ground circuit.

[0116] Open end, closed end: In some embodiments, the open end and the closed end are, for example, relative to whether they are grounded. The closed end is grounded, and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, relative to other conductors. The closed end is electrically connected to other conductors, and the open end is not electrically connected to other conductors. In one embodiment, the open end can also be referred to as a suspended end, a free end, an open end, or an open-circuit end. In one embodiment, the closed end can also be referred to as a grounded end or a short-circuit end. It should be understood that in some embodiments, other conductors can be coupled and connected through the open end to transfer coupling energy (which can be understood as transferring current).

[0117] In some embodiments, the "closed end" can also be understood from the perspective of current distribution. The closed end or the grounded end, etc., can be understood as a point with larger current on the radiator, or as a point with smaller electric field on the radiator. In one embodiment, the current distribution characteristics of larger current / small electric field can be maintained by coupling electronic devices (for example, capacitors, inductors, etc.) through the closed end. In one embodiment, the current distribution characteristics of larger current / small electric field can be maintained by opening a gap at or near the closed end (for example, a gap filled with insulating material).

[0118] In some embodiments, the "open end" can also be understood from the perspective of current distribution. The open end or suspended end, etc., can be understood as a point with smaller current on the radiator, or as a point with larger electric field on the radiator. In one embodiment, coupling electronic devices (for example, capacitors, inductors, etc.) through the open end can maintain the current distribution characteristics of the smaller current point / larger electric field point.

[0119] It should be understood that coupling the radiator end at a gap (from the perspective of the structure of the radiator, it is similar to a radiator at an opening of an open end or a suspended end) with electronic devices (for example, capacitors, inductors, etc.) can make the radiator end a point with larger current / smaller electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0120] Resonance / resonance frequency: The resonance frequency is also called the resonance frequency. The resonance frequency may refer to the frequency at which the imaginary part of the antenna input impedance is zero. The resonance frequency may have a frequency range, that is, the frequency range in which resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency point frequency. The return loss characteristic of the center frequency may be less than -20dB. It should be understood that, unless otherwise specified, the first resonance mentioned in this application for the antenna / radiator "generating the first resonance" should be the fundamental mode resonance generated by the antenna / radiator, or the lowest frequency resonance generated by the antenna / radiator.

[0121] Resonance frequency band / communication frequency band / working frequency band: Regardless of the type of antenna, it always works within a certain frequency range (band width). For example, an antenna that supports the B40 frequency band has a working frequency band that includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the working frequency band of the antenna includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the working frequency band of the antenna.

[0122] Electrical length: It can refer to the ratio of physical length (ie mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. The electrical length can satisfy the following formula:

[0123]

[0124] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0125] Wavelength: or operating wavelength, which can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, then the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "operating wavelength" can also refer to the wavelength corresponding to the non-center frequency of the resonant frequency or the operating frequency band.

[0126] It should be understood that the wavelength of the radiation signal in the air can be calculated as follows: (wavelength in air, or wavelength in vacuum) = speed of light / frequency, where frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3×108 m / s. The wavelength of the radiation signal in the medium can be calculated as follows: Among them, ε is the relative dielectric constant of the medium. The wavelength in the embodiments of the present application generally refers to the dielectric wavelength, which can be the dielectric wavelength corresponding to the center frequency of the resonant frequency, or the dielectric wavelength corresponding to the center frequency of the working frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, the wavelength can be the dielectric wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "dielectric wavelength" may also refer to the dielectric wavelength corresponding to the non-center frequency of the resonant frequency or the working frequency band. For ease of understanding, the dielectric wavelength mentioned in the embodiments of the present application can be simply calculated by the relative dielectric constant of the medium filled on one or more sides of the radiator.

[0127] Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the antenna port.

[0128] Antenna radiation efficiency: refers to the ratio of the power radiated by the antenna into space (i.e. the power of the electromagnetic wave part that is effectively converted) to the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the loss power; the loss power mainly includes the return loss power and the ohmic loss power of the metal and / or the dielectric loss power. The radiation efficiency is a value that measures the radiation ability of the antenna. Metal loss and dielectric loss are both factors that affect the radiation efficiency.

[0129] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between efficiency and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna.

[0130] Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmit power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the greater the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the radiation efficiency of the antenna.

[0131] Antenna return loss can be represented by the S11 parameter, which is one of the S parameters. S11 represents the reflection coefficient, which can characterize the antenna transmission efficiency. The S11 parameter is usually a negative number. The smaller the S11 parameter is, the smaller the antenna return loss is, and the less energy is reflected back by the antenna itself, which means that more energy actually enters the antenna, and the higher the antenna system efficiency is; the larger the S11 parameter is, the greater the antenna return loss is, and the lower the antenna system efficiency is.

[0132] It should be noted that in engineering, the S11 value is generally -6dB as the standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna can work normally, or that the antenna has good transmission efficiency.

[0133] It should be understood that the same resonant frequency band (for example, S11<-4dB) of the first resonance and the second resonance mentioned in the embodiments of the present application (also referred to as the same frequency) can be understood as any one of the following situations:

[0134] The resonant frequency band of the first resonance and the resonant frequency band of the second resonance include the same communication frequency band. In one embodiment, the resonant frequency band of the first resonance and the resonant frequency band of the second resonance can be applied to a MIMO antenna system. For example, the resonant frequency band of the first resonance and the resonant frequency band of the second resonance both include the sub-6G frequency band in 5G, and it can be considered that the resonant frequency band of the first resonance and the resonant frequency band of the second resonance are the same frequency.

[0135] The resonant frequency band of the first resonance and the resonant frequency band of the second resonance have at least partial frequency overlap. For example, the resonant frequency band of the first resonance includes B35 (1.85-1.91 GHz) in LTE, and the resonant frequency band of the second resonance includes B39 (1.88-1.92 GHz) in LTE. If the frequency of the resonant frequency band of the first resonance and the frequency of the resonant frequency band of the second resonance partially overlap, it can be considered that the first resonance and the second resonance are of the same frequency.

[0136] It should be understood that the adjacent operating frequency bands of the first resonance and the second resonance mentioned in the embodiments of the present application can be understood as:

[0137] In the resonant frequency band of the first resonance and the resonant frequency band of the second resonance, the distance between the starting frequency point of the higher frequency band and the ending frequency point of the lower frequency band is less than 10% of the center frequency of the higher frequency band. For example, the resonant frequency band of the first resonance includes B3 (1.71-1.785 GHz) in LTE, and the resonant frequency band of the second resonance includes L1 (1578.42±1.023 MHz) in GPS. B3 (1.71-1.785 GHz) and L1 (1578.42±1.023 MHz) are adjacent frequency bands, so it can be considered that the resonant frequency band of the first resonance and the resonant frequency band of the second resonance are adjacent. Or for example, the resonant frequency band of the first resonance includes B40 (2.3-2.4 GHz) in LTE, and the resonant frequency band of the second resonance includes the BT band (2.4-2.485 GHz). B40 (2.3-2.4 GHz) and the BT band (2.4-2.485 GHz) are adjacent frequency bands, and the resonant frequency band of the first resonance and the resonant frequency band of the second resonance are considered to be adjacent.

[0138] Ground (GND): can refer to at least a part of any grounding layer, grounding plate, or grounding metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of any of the above grounding layers, grounding plates, or grounding components, etc. "GND" can be used for grounding components in electronic devices. In one embodiment, "ground" can be a grounding layer of a circuit board of an electronic device, or a grounding plate formed by a frame of an electronic device, or a grounding metal layer formed by a metal film under a screen. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12 to 14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by a dielectric layer or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer, and a routing layer, and the routing layer and the grounding layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on or connected to a circuit board; or electrically connected to a wiring layer and / or a ground layer in the circuit board. For example, a radio frequency source is disposed on the wiring layer.

[0139] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material can be any of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. It will be appreciated by those skilled in the art that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0140] Grounding: refers to coupling with the above-mentioned ground / floor in any way. In one embodiment, grounding can be achieved through physical grounding, such as physical grounding (or physical ground) at a specific position on the frame through some structural parts of the middle frame. In one embodiment, grounding can be achieved through device grounding, such as grounding through devices such as capacitors / inductors / resistors connected in series or in parallel (or device ground).

[0141] The technical solution of the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0142] Figure 11 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application. The foldable electronic device 100 may be a mobile phone, a tablet computer, an e-reader, a laptop computer, a wearable device such as a watch, or other electronic device with a folding function. Figure 1 The illustrated embodiment is described by taking a foldable mobile phone as an example.

[0143] refer to Figure 1 The foldable electronic device 100 may include a flexible display screen 110, a first frame 121, a first cover 122, a second frame 123, a second cover 124, and a hinge 125. In some embodiments, the first frame 121, the first cover 122, the second frame 123, and the second cover 124 may form a first shell 126 and a second shell 127 that support the flexible display screen 110. In other embodiments, at least one of the first cover 122 and the second cover 124 may include a display screen.

[0144] Figure 1 The dot matrix pattern filled in the figure can schematically represent the flexible display screen 110. The flexible display screen 110 can have the characteristics of strong flexibility and bendability, and can provide users with a new interaction method based on the bendable characteristics. The display panel of the flexible display screen 110 can, for example, adopt any one of a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc., and the embodiments of the present application are not limited to this.

[0145] The flexible display screen 110 may include a first display portion 111 corresponding to the first housing 126, a second display portion 112 corresponding to the second housing 127, and a foldable display portion 113 corresponding to the hinge 125. The foldable display portion 113 may be connected between the first display portion 111 and the second display portion 112.

[0146] The first frame 121 may surround the outer periphery of the first cover 122, and at least a portion of the first frame 121 may also surround the outer periphery of the first display portion 111. The first display portion 111 may be arranged parallel to and spaced from the first cover 122, and the first display portion 111 and the first cover 122 may be located on both sides of the first frame 121. The space between the first display portion 111 and the first cover 122 may be used to place components of the foldable electronic device 100, such as an antenna, a circuit board assembly, and the like.

[0147] The second frame 123 may surround the outer periphery of the second cover 124, and at least a portion of the second frame 123 may also surround the outer periphery of the second display portion 112. The second display portion 112 may be arranged in parallel and spaced apart from the second cover 124, and the second display portion 112 and the second cover 124 may be located on both sides of the second frame 123. The space between the second display portion 112 and the second cover 124 may be used to place components of the foldable electronic device 100, such as an antenna, a circuit board assembly, etc.

[0148] In one embodiment provided in the present application, the cover body and the frame may be two parts of the shell of the foldable electronic device 100, and the cover body and the frame may be connected, and the form of the connection may not belong to assembly methods such as snap-on, gluing, welding, riveting, clearance fit, etc. The connection relationship between the cover body and the frame is usually difficult to separate. In another embodiment provided in the present application, the cover body and the frame may be two different components. By assembling the cover body and the frame together, the shell of the foldable electronic device 100 can be formed.

[0149] The frame can at least partially serve as an antenna radiator to receive / transmit radio frequency signals, and there can be a gap between this portion of the frame serving as the radiator and other portions of the cover, thereby ensuring that the antenna radiator has a good radiation environment. In one embodiment, the cover can be provided with a gap at this portion of the frame serving as the radiator to facilitate the radiation of the antenna.

[0150] The antenna of the electronic device 100 can also be arranged in the frame. When the frame of the electronic device 100 is a non-conductive material, the antenna radiator can be located in the electronic device 100 and arranged along the frame. For example, the antenna radiator is arranged close to the frame to minimize the volume occupied by the antenna radiator and is closer to the outside of the electronic device 100 to achieve better signal transmission effect. It should be noted that the antenna radiator is arranged close to the frame means that the antenna radiator can be arranged close to the frame, or it can be arranged close to the frame, for example, there can be a certain small gap between the antenna radiator and the frame.

[0151] The antenna of the electronic device 100 may also be disposed in the housing, such as a bracket antenna, a millimeter wave antenna, etc. ( Figure 1). The clearance of the antenna disposed in the housing can be obtained by a slit / opening on any one of the cover, and / or the frame, and / or the display screen, or by a non-conductive gap / aperture formed between any of them, and the clearance setting of the antenna can ensure the radiation performance of the antenna. It should be understood that the clearance of the antenna can be a non-conductive area formed by any conductive component in the electronic device 100, and the antenna radiates signals to the external space through the non-conductive area. In one embodiment, the antenna can be in the form of an antenna based on a flexible printed circuit (FPC), an antenna based on laser direct structuring (LDS), or a microstrip disk antenna (MDA). In one embodiment, the antenna can also be a transparent structure embedded in the display screen of the electronic device 100, so that the antenna is a transparent antenna unit embedded in the display screen of the electronic device 100.

[0152] The foldable electronic device 100 may also include a printed circuit board PCB (not shown in the figure). The PCB is arranged in the cavity formed by the cover body. Among them, the PCB can use a flame retardant material (FR-4) dielectric board, a Rogers dielectric board, a mixed dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code for a flame retardant material grade, and the Rogers dielectric board is a high-frequency board. Components are carried on the PCB17, such as radio frequency chips, etc. In one embodiment, a metal layer can be provided on the printed circuit board PCB. The metal layer can be used for grounding the components carried on the printed circuit board PCB, and can also be used for grounding other components, such as a bracket antenna, a frame antenna, etc. The metal layer can be called a floor, a grounding plate, or a grounding layer. In one embodiment, the metal layer can be formed by etching metal on the surface of any layer of the dielectric board in the PCB. In one embodiment, the metal layer for grounding can be provided on the printed circuit board PCB on one side close to the flexible display screen 110. In one embodiment, the edge of the PCB can be regarded as the edge of its grounding layer. The electronic device 100 can also have other floors / grounding plates / grounding layers, as described above, which will not be repeated here.

[0153] The rotating shaft 125 can be connected between the first housing 126 and the second housing 127. Under the action of the rotating shaft 125, the first housing 126 and the second housing 127 can be moved closer to each other or farther away from each other. Accordingly, the first display portion 111 of the flexible display screen 110 and the second display portion 112 of the flexible display screen 110 can be moved closer to each other or farther away from each other, so that the flexible display screen 110 can be folded or unfolded.

[0154] In one example, the rotating shaft 125 may include, for example, a main shaft, a first connecting component, and a second connecting component. The first connecting component may be fixed to the first cover 122, and the second connecting component may be fixed to the second cover 124. The first connecting component and the second connecting component may rotate relative to the main shaft. The mutual movement of the first connecting component and the second connecting component may drive the mutual movement of the first shell 126 and the second shell 127, thereby realizing the opening and closing function of the foldable electronic device 100.

[0155] Figure 1 The foldable electronic device 100 is currently in the unfolded state. In the unfolded state, the angle between the first housing 126 and the second housing 127 can be approximately 180°. The flexible display screen 110 can be in the following state: Figure 1 Shown in expanded state.

[0156] Figure 2 A possible folding state of the foldable electronic device 100 is shown. Figure 2 The foldable electronic device 100 is shown in an outward folded state (the outward folded state may be simply referred to as an external folded state). Figure 2 The folded outward state shown can be, for example, a left-right folded outward state or an up-down folded outward state. Figure 1 and Figure 2 , describing a possible folding state of the foldable electronic device 100.

[0157] In the embodiment of the present application, the foldable electronic device 100 being in a folded state may mean that the foldable electronic device 100 is currently bent, and the bending degree of the foldable electronic device 100 reaches the maximum. At this time, the first cover 122 and the second cover 124 may be approximately parallel, spaced from each other, and arranged face to face, and the spacing distance between the first cover 122 and the second cover 124 is the smallest, and at least part of the first shell 126 and the second shell 127 are accommodated in the space surrounded by the flexible display screen 110; the first display portion 111, the first shell 126, the second shell 127, and the second display portion 112 are stacked in sequence. Similarly, the first display portion 111 and the second display portion 112 may be approximately parallel, spaced from each other, and the spacing distance between the first cover 122 and the second cover 124 is less than the spacing distance between the first display portion 111 and the second display portion 112. At this time, the first display portion 111 and the second display portion 112 may be regarded as being located on different planes.

[0158] Combination Figure 1 and Figure 2When the foldable electronic device 100 is in the outward folded state, the first cover 122 and the second cover 124 can be close to each other, and the first display portion 111 and the second display portion 112 can be close to each other. The first display portion 111, the second display portion 112 and the foldable display portion 123 can form a housing area for accommodating the first cover 122, the second cover 124, and the rotating shaft 125. In other words, the first cover 122, the second cover 124, and the rotating shaft 125 can be accommodated in the interval space between the first display portion 111 and the second display portion 112.

[0159] It should be understood that the foldable electronic device 100 can be folded inward (the inward folding state can be referred to as the inward folding state). When the foldable electronic device 100 is in the inward folding state, the first cover 122 and the second cover 124 can be close to each other, and the first display portion 111 and the second display portion 112 can be close to each other. The first cover 122, the second cover 124 and the rotating shaft 125 can form a housing area for accommodating the first display portion 111, the second display portion 112, and the foldable display portion 123. In other words, the first display portion 111, the second display portion 112, and the foldable display portion 123 can be accommodated in the interval space between the first cover 122 and the second cover 124.

[0160] The foldable electronic device 100 can switch between a folded state and an unfolded state. When the foldable electronic device 100 is in the folded state, the occupied space of the foldable electronic device 100 is relatively small; when the foldable electronic device 100 is in the unfolded state, the foldable electronic device 100 can display a relatively large screen to increase the viewing range of the user.

[0161] The foldable electronic device 100 may further include a third housing 128 and a rotating shaft 129. Figure 3 As shown. The hinge 129 can be connected between the third housing 128 and the second housing 127. The third housing 128 and the second housing 127 can be close to each other or away from each other. As the number of foldable parts of the foldable electronic device 100 increases, the occupied space of the foldable electronic device 100 can be further reduced in the folded state while maintaining the same screen size in the unfolded state.

[0162] And in Figure 3 In the foldable electronic device 100 shown, since it has three foldable parts (a first shell 126, a second shell 127 and a third shell 128), the foldable electronic device 100 has three forms: 1. unfolded state; 2. folded state; 3. partially unfolded state.

[0163] 1. If Figure 3, which is a possible unfolded state of the foldable electronic device 100. In the unfolded state, the angle between the first housing 126, the second housing 127 and the third housing 128 may be approximately 180°. The flexible display screen 110 may be in the unfolded state.

[0164] 2. If Figure 4 , which is a possible folding state (three-folding state) of the foldable electronic device 100. In the folded state, the first housing 126 and the second housing 127 rotate along the rotation axis 125, and the second housing 127 and the third housing 128 rotate along the rotation axis 129, so that the bending degree of the foldable electronic device 100 reaches the maximum. At this time, the first housing 126, the second housing 127 and the third housing 128 can be regarded as being located on different planes.

[0165] 3. If Figure 5 , which is a possible partially unfolded state (two-folded state) of the foldable electronic device 100. In the partially unfolded state, the angle between the first shell 126 and the second shell 127 can be about 180°, and the second shell 127 and the third shell 128 rotate along the rotation axis 129, so that the third shell 128 is close to the second shell 127. At this time, the first shell 126 and the second shell 127 are regarded as being located on the same plane, and the second shell 127 and the third shell 128 can be regarded as being located on different planes. In another possible partially unfolded state, the angle between the third shell 128 and the second shell 127 can be about 180°, and the first shell 126 and the second shell 127 rotate along the rotation axis 125, so that the first shell 126 is close to the second shell 127.

[0166] Figure 1 Only some components of the electronic device 100 are schematically shown, and the actual shapes, sizes and structures of these components are not limited to the following. Figure 1 limited.

[0167] It should be understood that in the embodiments of the present application, the surface where the display screen of the electronic device is located can be considered as the front side, the surface where the back cover is located can be considered as the back side, and the surface where the frame is located can be considered as the side side.

[0168] It should be understood that in the embodiments of the present application, when the user is holding the electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side. It should be understood that in the embodiments of the present application, when the user is holding the electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side.

[0169] First, by Figures 6 to 9 To introduce this application, four antenna modes will be involved. Among them, Figure 6This is a schematic diagram of the common mode structure of an antenna provided in the present application and the corresponding current and electric field distribution. Figure 7 This is a schematic diagram of the structure of the differential mode of another antenna provided in the present application and the corresponding current and electric field distribution. Figure 6 and Figure 7 The antenna radiator is open at both ends, and its common mode mode and differential mode can be called line common mode mode and line differential mode mode respectively. Figure 8 This is a schematic diagram of the common mode structure of an antenna provided in the present application and the corresponding distribution of current, electric field and magnetic current. Fig. 9 It is a schematic diagram of the structure of the differential mode of another antenna provided in the present application and the corresponding distribution of current, electric field and magnetic current. Figure 8 and Fig. 9 Both ends of the antenna radiator are coupled to the floor to achieve grounding, and its common mode mode and differential mode can be called slot common mode mode and slot differential mode mode, respectively.

[0170] It should be understood that the "common mode mode" or "CM mode" in this application includes a line common mode mode and a slot common mode mode, and the "differential mode mode" or "DM mode" in this application includes a line differential mode mode and a slot differential mode mode, which can be specifically determined according to the structure of the antenna.

[0171] It should be understood that the "common-differential mode" or "CM-DM mode" in this application refers to the line common mode mode and the line differential mode mode generated on the same radiator, or refers to the slot common mode mode and the slot differential mode mode generated on the same radiator, which can be specifically determined according to the structure of the antenna.

[0172] 1. Common mode (CM) mode

[0173] Figure 6 (a) in the figure shows that the radiator of the antenna 40 is open at both ends, and is connected to a feeding circuit (not shown) at the middle position 41. In one embodiment, the feeding form of the antenna 40 adopts symmetrical feed. The feeding circuit can be connected to the middle position 41 of the antenna 40 through a feeding line 42. It should be understood that symmetrical feeding can be understood as one end of the feeding circuit is connected to the radiator, and the other end is coupled to the floor to achieve grounding, wherein the coupling point between the feeding circuit and the radiator (feeding point) is located at the center of the radiator, and the center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or an area within a certain range near the above midpoint).

[0174] The middle position 41 of the antenna 40 may be, for example, the geometric center of the antenna, or the midpoint of the electrical length of the radiator. For example, the connection between the feed line 42 and the antenna 40 covers the middle position 41 .

[0175] Figure 6(b) in FIG. 4 shows the current and electric field distribution of the antenna 40. Figure 6 As shown in (b), the current is distributed in opposite directions on both sides of the middle position 41, for example, symmetrically; the electric field is distributed in the same direction on both sides of the middle position 41. Figure 6 As shown in (b) in FIG. 4 , the current at the feeder 42 is distributed in the same direction. Based on the current distribution in the feeder 42, Figure 6 The feeding shown in (a) in FIG. 4 is called line CM feeding. Based on the reverse distribution of the current on both sides of the connection between the radiator and the feeding line 42, Figure 6 The antenna mode shown in (b) in the figure can be called a linear CM mode (it can also be simply referred to as a CM mode. For example, for a linear antenna, the CM mode refers to a linear CM mode). Figure 6 The current and electric field shown in (b) can be called the current and electric field of the line CM mode, respectively.

[0176] The current is stronger at the middle position 41 of the antenna 40 (the current is stronger near the middle position 41 of the antenna 40), and weaker at both ends of the antenna 40, such as Figure 6 As shown in (b) in FIG. 4 , the electric field is weak at the middle position 41 of the antenna 40 and is strong at both ends of the antenna 40 .

[0177] 2. Line differential mode (DM) mode

[0178] like Figure 7 (a) in the figure shows that the left and right ends of the two radiators of the antenna 50 are open ends, and the feeding circuit is connected at the middle position 51. In one embodiment, the feeding form of the antenna 50 adopts anti-symmetrical feed. One end of the feeding circuit is connected to one of the radiators through the feeding line 52, and the other end of the feeding circuit is connected to the other radiator through the feeding line 52. The middle position 51 can be the geometric center of the antenna 50, or the gap formed between the radiators.

[0179] It should be understood that the "center antisymmetric feeding" mentioned in this application can be understood as that the positive and negative poles of the feeding unit are respectively connected to two coupling points near the above-mentioned midpoint of the radiator. In one embodiment, the positive and negative poles of the feeding unit output signals with the same amplitude and opposite phases, for example, a phase difference of 180°±10°.

[0180] Figure 7 (b) in FIG. 5 shows the current and electric field distribution of the antenna 50. Figure 7 As shown in (b) of FIG. 5 , the current is distributed in the same direction on both sides of the middle position 51 of the antenna 50, for example, in an anti-symmetrical distribution; and the electric field is distributed in opposite directions on both sides of the middle position 51. Figure 7As shown in (b) in FIG. 5 , the current at the feeder 52 presents a reverse distribution. Based on the reverse distribution of the current at the feeder 52, Figure 7 The feeding shown in (a) in FIG. 5 is called line DM feeding. Based on the fact that the current is distributed in the same direction on both sides of the connection between the radiator and the feeding line 52, Figure 7 The antenna mode shown in (b) can be called a linear DM mode (can also be simply referred to as a DM mode. For example, for a linear antenna, the DM mode refers to a linear DM mode). Figure 7 The current and electric field shown in (b) can be called the current and electric field of the line DM mode, respectively.

[0181] The current is stronger at the middle position 51 of the antenna 50 (the current is stronger near the middle position 51 of the antenna 50), and weaker at both ends of the antenna 50, such as Figure 7 As shown in (b) in FIG. 5 , the electric field is weak at the middle position 51 of the antenna 50 and is strong at both ends of the linear antenna 50 .

[0182] It should be understood that the antenna radiator can be understood as a metal structure that generates radiation, and the number of the metal structure can be one, such as Figure 6 As shown, or, it can be two pieces, such as Figure 7 As shown, it can be adjusted according to actual design or production needs. For example, for the line CM mode, it can also be Figure 7 As shown in the figure, two radiators are used, and the two ends of the two radiators are arranged opposite to each other and separated by a gap. A symmetrical feeding method is adopted at the two ends close to each other. For example, the same feed source signal is fed into the two ends close to each other, and the same Figure 6 The antenna structure shown in FIG. 1 has a similar effect. Correspondingly, for the line DM mode, it can also be Figure 6 As shown in the figure, a radiator is used, two feeding points are set at the middle position of the radiator and an antisymmetric feeding method is adopted. For example, if two symmetrical feeding points on the radiator are fed with signals with the same amplitude and opposite phases respectively, the same power supply as in the embodiment of the present invention can be obtained. Figure 7 The antenna structure shown has a similar effect.

[0183] 3. Line CM-DM mode

[0184] Above Figure 6 and Figure 7 It is shown that when both ends of the radiator are open, a line CM mode and a line DM mode are generated by using different feeding methods.

[0185] When the antenna is fed in an asymmetric way (the feeding point is offset from the middle of the radiator, including side feeding or offset feeding), or the grounding point of the radiator (where it is coupled with the floor) is asymmetric (the grounding point is offset from the middle of the radiator), the antenna can simultaneously generate the first resonance and the second resonance, corresponding to the line CM mode and the line DM mode, respectively. For example, the first resonance corresponds to the line CM mode, and the current and electric field distribution are as follows: Figure 6 The second resonance corresponds to the line DM mode, and the current and electric field distribution are shown in (b). Figure 7 As shown in (b) in .

[0186] 4. Slot CM mode

[0187] Figure 8 The radiator of the antenna 60 shown in (a) has a hollow slot or gap 61, or the radiator of the antenna 60 and the ground (for example, the floor, which can be a PCB) enclose the slot or slot 61. The slot 61 can be formed by grooving the floor. An opening 62 is provided on one side of the slot 61, and the opening 62 can be specifically provided in the middle position of the side. The middle position of the side of the slot 61 can be, for example, the geometric midpoint of the antenna 60, or the midpoint of the electrical length of the radiator, for example, the opening 62 is provided on the radiator so that the area covers the middle position of the side. The opening 62 can be connected to the feeding circuit and antisymmetric feeding can be used. It should be understood that antisymmetric feeding can be understood as the positive and negative poles of the feeding circuit are respectively connected to the two ends of the radiator. The signals output by the positive and negative poles of the feeding circuit have the same amplitude and opposite phases, for example, the phase difference is 180°±10°.

[0188] Figure 8 (b) in FIG. 6 shows the current, electric field, and magnetic current distribution of the antenna 60. Figure 8 As shown in (b) of FIG. 1 , the current on the conductor (such as the floor, and / or the radiator 60) around the slot 61 is distributed in the same direction around the slot 61, the electric field is distributed in opposite directions on both sides of the middle position of the slot 61, and the magnetic current is distributed in opposite directions on both sides of the middle position of the slot 61. Figure 8 As shown in (b), the electric field at the opening 62 (e.g., the feeding point) is in the same direction, and the magnetic current at the opening 62 (e.g., the feeding point) is in the same direction. Based on the same direction of the magnetic current at the opening 62 (the feeding point), Figure 8 The feeding shown in (a) of FIG. 6 is referred to as slot CM feeding. Based on the current being distributed in the same direction (e.g., anti-symmetric distribution) on the radiators on both sides of the opening 62, or based on the current being distributed in the same direction around the slot 61 on the conductors around the slot 61, Figure 8 The antenna mode shown in (b) can be called a slot CM mode (also referred to as a CM mode for short. For example, for a slot antenna, the CM mode refers to a slot CM mode). Figure 8 The electric field, current, and magnetic current distributions shown in (b) can be called the electric field, current, and magnetic current of the slot CM mode.

[0189] The magnetic field is weak in the middle of the antenna 60 and strong at both ends of the antenna 60. The electric field is strong in the middle of the antenna 60 (the largest point of the electric field is located near the middle of the antenna 60) and weak at both ends of the antenna 60, such as Figure 8 As shown in (b) in .

[0190] 5. Slot DM mode

[0191] like Fig. 9 The radiator of the antenna 70 shown in (a) has a hollow slot or gap 72, or the radiator of the antenna 70 and the ground (for example, the floor, which can be a PCB) enclose the slot or slot 72. The slot 72 can be formed by grooving the floor. The middle position 71 of the slot 72 is connected to the feeding circuit, and symmetrical feeding is adopted. It should be understood that symmetrical feeding can be understood as one end of the feeding circuit is connected to the radiator, and the other end is coupled to the floor to achieve grounding, wherein the coupling point between the feeding circuit and the radiator (feeding point) is located at the center of the radiator, and the center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or an area within a certain range near the above midpoint). The middle position of one side of the slot 72 is connected to the positive pole of the feeding circuit, and the middle position of the other side of the slot 72 is connected to the negative pole of the feeding circuit. The middle position of the side of the slot 72 can be, for example, the middle position of the slot antenna 60 / the middle position of the ground, such as the geometric midpoint of the slot antenna, or the midpoint of the electrical length of the radiator, such as the connection between the feeding circuit and the radiator covering the middle position 51 of the side.

[0192] Fig. 9 (b) in FIG. 7 shows the current, electric field, and magnetic current distribution of the antenna 70. Fig. 9 As shown in (b) of FIG. 1 , on the conductor (such as the floor, and / or the radiator 60) around the slot 72, the current is distributed around the slot 72, and is distributed in opposite directions on both sides of the middle position of the slot 72, the electric field is distributed in the same direction on both sides of the middle position 71, and the magnetic current is distributed in the same direction on both sides of the middle position 71. The magnetic current at the feeding circuit is distributed in opposite directions (not shown). Based on the magnetic current at the feeding circuit being distributed in opposite directions, Fig. 9 The feeding shown in (a) in FIG. 1 may be referred to as slot DM feeding. Based on the reverse distribution (e.g., symmetrical distribution) of the current on both sides of the connection between the feeding circuit and the radiator, or based on the reverse distribution (e.g., symmetrical distribution) of the current around the slot 71, Fig. 9 The antenna mode shown in (b) can be called a slot DM mode (can also be referred to as a DM mode for short, for example, for a slot antenna, the DM mode refers to a slot DM mode). Fig. 9 The distribution of electric field, current and magnetic current shown in (b) can be called the electric field, current and magnetic current of the slot DM mode.

[0193] The current is weaker in the middle of the antenna 70 and stronger at both ends of the antenna 70. The electric field is stronger in the middle of the antenna 70 (the largest point of the electric field is located near the middle of the antenna 60) and weaker at both ends of the slot antenna 70, such as Fig. 9 As shown in (b) in .

[0194] It should be understood that the radiator of the antenna can be understood as a metal structure that generates radiation (for example, a part of the floor), which may include an opening, such as Figure 8 As shown, or, it can also be a complete ring, such as Fig. 9 As shown, it can be adjusted according to actual design or production needs. For example, for the slot CM mode, it can also be Fig. 9 As shown in the figure, a complete annular radiator is used, two feeding points are set at the middle position of the radiator on one side of the slot 61, and an anti-symmetric feeding method is adopted. For example, signals with the same amplitude and opposite phases are fed into the two ends of the original opening position, and the same Figure 8 The antenna structure shown in FIG. 1 has a similar effect. Correspondingly, for the slot DM mode, it can also be Figure 8 The radiator with an opening is shown in the figure, and a symmetrical feeding method is adopted at both ends of the opening. For example, the same feed source signal is fed into both ends of the radiator on both sides of the opening, and the same Fig. 9 The antenna structure shown has a similar effect.

[0195] 6. Slot CM-DM mode.

[0196] Above Figure 8 and Fig. 9 It is shown that the slot structure uses different feeding methods to generate slot CM mode and slot DM mode respectively.

[0197] When the antenna is fed in an asymmetric way (the feeding point deviates from the middle position, including side feeding or offset feeding), or the opening of one side of the slot is asymmetric (the opening deviates from the middle position of the side), the antenna can simultaneously generate the first resonance and the second resonance, corresponding to the slot CM mode and the slot DM mode, respectively. For example, the first resonance corresponds to the slot CM mode, and the current, electric field, and magnetic current distribution are as follows: Figure 8 The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distribution are shown in (b). Fig. 9 As shown in (b) in .

[0198] Since the above antenna structures can generate two working modes (the electric field is symmetrically distributed or antisymmetrically distributed) in which the electric field is orthogonal (the product of the electric field in the far field is zero (integrated orthogonal)), the isolation between the two working modes of this antenna structure is good, and it can be applied to multi-input multi-output (MIMO) antenna systems in electronic devices.

[0199] At the same time, when the two antenna structures respectively operate in two working modes (the electric field is symmetrically distributed or antisymmetrically distributed) in which the electric field is orthogonal (the product of the electric field in the far field is zero (integrated orthogonal)), there is also good isolation between the two antenna structures, and they can be used as sub-units in the MIMO antenna system in electronic devices.

[0200] It should be understood that the two antenna structures can be understood as antenna structures into which signals are fed by the first feeding circuit and the second feeding circuit respectively. The first feeding circuit and the second feeding circuit are different. In the electronic device, the first feeding circuit and the second feeding circuit can be different radio frequency channels in a radio frequency chip (RF IC).

[0201] The embodiment of the present application provides a foldable electronic device, including an antenna. The antenna uses the first frame and the second frame of the foldable electronic device as radiators. Part of the frame of the first frame is used as a radiation branch (including a feeding point), and part of the frame of the second frame is used as a parasitic branch. By providing a break in the parasitic branch, the radiation aperture of the antenna is increased to improve the radiation characteristics of the antenna.

[0202] Fig.10 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0203] like Fig.10 As shown, the foldable electronic device 100 may include a first housing 201 , a second housing 202 and a floor 101 .

[0204] The first housing 201 includes a first frame 210 , at least a portion of which is spaced apart from the floor 101 . The second housing 202 includes a second frame 220 , at least a portion of which is spaced apart from the floor 101 .

[0205] The first frame 210 includes a first position 211 and a second position 212. In one embodiment, the first frame 210 is coupled to the floor 101 or has a first gap at the first position 211. In one embodiment, the first frame 210 is coupled to the floor 101 or has a second gap at the second position 212.

[0206] It should be understood that in the embodiments of the present application, the coupling connection is only illustrated by taking electrical connection as an example. In actual production or practice, it can also be achieved by indirect coupling. For the sake of simplicity of discussion, it will not be described one by one.

[0207] The second frame 220 includes a third position 221 and a fourth position 222. The second frame 220 is coupled to the floor 101 at the third position 221, and the second frame 220 is provided with a third gap at the fourth position 222.

[0208] In one embodiment, the foldable electronic device 100 may further include a first shaft 203. The first shaft 203 is located between the first housing 201 and the second housing 202, and the first shaft 203 is rotatably connected to the first housing 201 and the second housing 202, respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other.

[0209] It should be understandable that Fig.10 In the foldable electronic device 100 shown, the first rotating shaft 203 is directly connected to the first shell 201 and the second shell 202 respectively, so that the first shell 201 and the second shell 202 can rotate relative to each other. In addition, "the first rotating shaft 203 is rotatably connected to the first shell 201 and the second shell 202 respectively" includes the situation that the first rotating shaft 203 can be rotatably connected to the first or second shell through one or more second rotating shafts and one or more intermediate shells. For example, in one embodiment, the foldable electronic device 100 may also include a first rotating shaft and a second rotating shaft, and one or more intermediate shells located between the first rotating shaft and the second rotating shaft. The first rotating shaft is located between the first shell 201 and the intermediate shell, and the first rotating shaft is rotatably connected to the first shell 201 and the intermediate shell respectively, so that the first shell 201 and the intermediate shell can rotate relative to each other. The second rotating shaft is located between the intermediate shell and the second shell 202, and the first rotating shaft 203 is rotatably connected to the intermediate shell and the second shell 202 respectively, so that the intermediate shell and the second shell 202 can rotate relative to each other.

[0210] The foldable electronic device 100 may further include an antenna 200 . The antenna 200 includes a first radiator 230 , a second radiator 240 , a first feeding circuit 251 , and a first element 252 .

[0211] The first radiator 230 is a conductive portion of the first frame 210 between the first position 211 and the second position 212. The first radiator 230 includes a first feeding point 231, and the first feeding circuit 251 is coupled to the first feeding point 231.

[0212] The second radiator 240 is a conductive portion of the second frame 220 between the third position 221 and the fourth position 222. The second radiator 240 is provided with a fourth slit, or in other words, the second frame 220 is provided with the fourth slit between the third position 221 and the fourth position 222. Both ends of the first element 252 are respectively coupled to the radiator portions of the second radiator 240 on both sides of the fourth slit. The length of the second radiator 240 is less than or equal to three times the length of the first radiator 230.

[0213] It should be understood that the "length" in this application refers to the physical length; and the "electrical length" in this application refers to the ratio of the physical length to the wavelength of the transmitted electromagnetic wave.

[0214] In one embodiment, the length of the second radiator 240 is greater than the length of the first radiator 230 .

[0215] The length of the second radiator 240 may be greater than or equal to three-half of the length of the first radiator 230 and less than or equal to two-fifths of the length of the first radiator 230 .

[0216] Alternatively, the length of the second radiator 240 may be greater than or equal to 1.8 times the length of the first radiator 230 and less than or equal to 2.2 times the length of the first radiator 230 .

[0217] In one embodiment, the length of the second radiator 240 may be less than or equal to the length of the first radiator 230 .

[0218] The length of the second radiator 240 may be greater than or equal to 0.8 times the length of the first radiator 230 and less than or equal to the length of the first radiator 230 .

[0219] Alternatively, the length of the second radiator 240 may be greater than or equal to 0.9 times the length of the first radiator 230 and less than or equal to the length of the first radiator 230 .

[0220] For example, the first radiator 230 may also have a gap, or in other words, the first frame 210 may have a gap between the first position 211 and the second position 212, and a corresponding element may be provided, and the two ends of the element are respectively coupled to the radiator parts of the first radiator 230 on both sides of the gap. In this way, the first radiator 230 and the second radiator 240 have similar structures and their lengths are also relatively close. For details, please refer to the following Fig.44 The embodiment section shown.

[0221] It should be understood that the ratio between the length of the second radiator 240 and the length of the first radiator 230 can be adjusted according to actual production or design.

[0222] The second radiator 240 further includes a first coupling point 241 and a second coupling point 242. The second radiator 240 is provided with the fourth gap between the first coupling point 241 and the second coupling point 242. The first end of the first element 252 is coupled to the first coupling point 241, and the second end of the first element 252 is coupled to the second coupling point 242.

[0223] In one embodiment, the first element 252 can be used to adjust the equivalent capacitance between the first coupling point 241 and the second coupling point 242, thereby adjusting the radiation characteristics of the first parasitic resonance (for example, the frequency of the resonance point). In one embodiment, the distance between the first coupling point 241 and the second coupling point 242 and the fourth gap is less than or equal to 5 mm. Among them, the distance between the first coupling point 241 and the second coupling point 242 and the fourth gap can be understood as the minimum distance between the first coupling point 241 and the second coupling point 242 and the conductors on both sides of the fourth gap. When the first element 252 is electrically connected to the first coupling point 241 and the second coupling point 242 through a metal spring, the distance between the fourth gap can be understood as the minimum distance between the center of the part where the metal spring contacts the coupling point and the conductors on both sides of the fourth gap.

[0224] It should be understood that the equivalent capacitance between the first coupling point 241 and the second coupling point 242 can be understood as the distributed capacitance formed by the fourth gap and the capacitance equivalent to the first element 252 connected in parallel. The capacitance value of the equivalent capacitance can be determined by the electrical parameters of the first element 252 (e.g., the equivalent capacitance value) and the electrical parameters of the fourth gap (e.g., the width of the fourth gap, the relative dielectric constant of the medium filled in the fourth gap).

[0225] In one embodiment, the length of the second radiator 240 between the third position 221 and the fourth slot is smaller than the length of the second radiator 240 between the third slot and the fourth slot.

[0226] According to the embodiment of the present application, since the second frame is coupled with the floor at the third position 221, the current near the third position is relatively strong, and the current near the fourth position is relatively weak when the second frame is slotted at the fourth position. When the fourth slot is provided in an area where the current on the second radiator 240 is relatively strong, the effect of reducing the intensity of a single current strong point of the second radiator by the fourth slot is more obvious, and the current distribution of the second radiator is relatively more uniform.

[0227] In one embodiment, the fourth slot is disposed between the midpoint of the second radiator 240 and the ground end (e.g., the third position 221), for example, the length of the second radiator 240 between the third position 221 and the fourth slot is less than the length of the second radiator 240 between the third slot and the fourth slot.

[0228] In one embodiment, the fourth slot is disposed between the midpoint of the second radiator 240 and the ground end (e.g., the third position 221), and the length of the second radiator 240 between the third position 221 and the fourth slot is less than or equal to three-fifths of the length of the second radiator 240 between the third slot and the fourth slot.

[0229] In one embodiment, the fourth slot is disposed between the midpoint of the second radiator 240 and the ground end (e.g., the third position 221), and the length of the second radiator 240 between the third position 221 and the fourth slot is less than or equal to one third of the length of the second radiator 240 between the third slot and the fourth slot.

[0230] In one embodiment, the fourth slot is disposed between the midpoint of the second radiator 240 and the ground end (e.g., the third position 221), and the length of the second radiator 240 between the third position 221 and the fourth slot is less than or equal to one seventh of the length of the second radiator 240 between the third slot and the fourth slot.

[0231] It should be understood that the position where the fourth slit is set, for the area where the current of the second radiator 240 is larger, should be understood as corresponding to the second radiator 240 without a slit (for example, working in a quarter-wavelength mode). After the fourth slit is set, the current intensity at the corresponding position becomes weaker, achieving the effect of evenly dispersing the current.

[0232] When the foldable electronic device 100 is in a folded state, the first radiator 230 and the second radiator 240 at least partially overlap along a first direction, where the first direction is a thickness direction of the foldable electronic device 100 , for example, a z direction.

[0233] The first radiator 230 is used to generate a first resonance. The second radiator 240 and the first element 252 are used to generate a first parasitic resonance.

[0234] It should be understood that the second radiator 240 and the first element 252 are used to generate the first parasitic resonance, which can be understood as the entire second radiator 240 and the first element 252 are used to generate the first parasitic resonance, and the electrical parameters of the second radiator 240 (for example, electrical length) and the electrical parameters of the first element 252 (for example, equivalent capacitance value or equivalent inductance value) directly affect the first parasitic resonance (for example, the frequency of the resonance point). In a comparative embodiment, the first electronic element 252 is not provided, and the resonance point of the second parasitic resonance will shift the target frequency band beyond the range of the first threshold, and the first threshold may be greater than or equal to 200MHz.

[0235] The first radiator 230 is used to generate the first resonance, which can be understood as the entire radiator is used to generate the resonance. At the same time, it should not be understood that other components (for example, the first element 252) or other radiators (for example, the parasitic radiator in the first shell or the parasitic radiator in the second shell) are not used to affect the resonance.

[0236] In one embodiment, "the first radiator 230 is used to generate the first resonance" and "the second radiator 240 and the first element 252 are used to generate the first parasitic resonance" can be understood as a whole technical solution, wherein the presence or absence of the first element 252 has a greater impact on the first parasitic resonance than on the first resonance. Relative to the solution of the present application, in the solution without the first element 252, the frequency difference shifted by the resonance point of the first parasitic resonance is greater than the frequency difference shifted by the first resonance. For example, the frequency difference shifted by the resonance point of the first parasitic resonance is more than 2 times, or more than 5 times, the frequency difference shifted by the first resonance.

[0237] It should be understood that the technical solution provided by the embodiment of the present application is that when the foldable electronic device 100 is in a folded state, the first radiator 230 in the antenna 200 acts as a main radiation branch (a branch into which the signal is fed from the feeding point), and the second radiator 240 acts as a parasitic branch (a branch that couples the signal by coupling the main radiation branch). The second radiator 240 can generate a first parasitic resonance by coupling with the first radiator 230. The resonant frequency of the first parasitic resonance can be determined by the length of the second radiator 240, and the resonant frequency of the first parasitic resonance can be determined by the electrical parameters of the second radiator 240 and the electrical parameters of the first element 252. In one embodiment, the first parasitic resonance is brought closer to the first resonance by the length of the second radiator 240, the length of the second radiator 240, and the electrical parameters of the first element 252. The first resonance and the first parasitic resonance jointly form an operating frequency band to expand the operating bandwidth of the antenna 200 and jointly support an operating frequency band of the foldable electronic device 100.

[0238] Among them, the first resonance and the first parasitic resonance jointly form a working frequency band, which can be understood as the first parasitic resonance and the first resonance are close to each other, and together form a resonance frequency band. For example, the resonance point frequency of the first resonance is lower than the resonance point frequency of the first parasitic resonance, or the resonance point frequency of the first resonance is higher than the resonance point frequency of the first parasitic resonance. In one embodiment, it can also be understood that the resonance point of the first resonance is connected to the first parasitic resonance in the S11 diagram, and the S11 of the connected area is less than -4dB to form a resonance frequency band.

[0239] Moreover, a working frequency band of the foldable electronic device 100 is set between the first coupling point 241 and the second coupling point 242, which can be understood as a frequency range, such as a low frequency band (LB) (698MHz-960MHz), a middle frequency band (MB) (1710MHz-2170MHz) or a high frequency band (HB) (2300MHz-2690MHz) in a cellular network. Taking a working frequency band of the foldable electronic device 100 as LB (698MHz-960MHz) as an example, the working frequency band may include multiple communication frequency bands within the frequency range, such as B5, B8, etc., which can be understood accordingly in the embodiments of the present application.

[0240] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within the range of 600 MHz to 1.5 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance may be less than or equal to 200 MHz; or, in one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within the range of 600 MHz to 1.5 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance may also be less than or equal to 100 MHz.

[0241] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within the range of 1.5 GHz to 3 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance may be less than or equal to 400 MHz; or, in one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within the range of 1.5 GHz to 3 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance may also be less than or equal to 200 MHz.

[0242] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within the range of 3 GHz to 6 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance may be less than or equal to 600 MHz; or, in one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within the range of 3 GHz to 6 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance may be less than or equal to 400 MHz.

[0243] A fourth gap is provided between the first coupling point 241 and the second coupling point 242, and the first element 252 is coupled and connected (the fourth gap provided on the second radiator 240 can be regarded as an equivalent capacitance provided on the second radiator 240, for example, a distributed capacitance, and the first element 252 can be used to determine the equivalent capacitance value of the fourth gap), which can reduce the intensity of a single current strong point of the second radiator 240 and make the current more evenly distributed. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which can reduce the conductor loss and dielectric loss caused by the conductor and dielectric provided around the second radiator 240 and the second radiator 240. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which can increase the radiation aperture of the second radiator 240. Therefore, a fourth gap is provided between the first coupling point 241 and the second coupling point 242, and the first element 252 is coupled and connected, which can improve the system efficiency and radiation efficiency of the antenna.

[0244] At the same time, the first radiator 230 serves as a main radiation branch (a branch into which the signal is fed from the feeding point), and the embodiment of the present application does not limit the antenna structure formed by the first radiator 230. For example, the first end and the second end of the first radiator 230 can be adjusted to be grounded or open (for example, the first frame 210 is coupled with the floor 101 at the first position 211 or is provided with a first gap, and the first frame 210 is coupled with the floor 101 at the second position 212 or is provided with a second gap) so that the first radiator 230 forms different antenna structures. The antenna structure formed by the first radiator 230 can operate in different antenna modes. For example, the first end and the second end of the first radiator 230 are open ends, and the first radiator can operate in the above-mentioned line CM-DM mode. The first end and the second end of the first radiator 230 are grounded, and the first radiator can operate in the above-mentioned slot CM-DM mode. One of the first end and the second end of the first radiator 230 is a grounded end and the other end is an open end, and the first radiator 230 can operate in a quarter-wavelength mode.

[0245] It should be understood that when one of the first end and the second end of the first radiator 230 is a grounded end and the other end is an open end, and the currents on the first radiator 230 are in the same direction, it can be considered that the first radiator 230 operates in a quarter mode. Among them, the current at the grounded end of the first radiator 230 is stronger, and the electric field at the open end of the first radiator 230 is stronger.

[0246] In one embodiment, the length of the second radiator 240 between the third position 221 and the fourth slot is smaller than the length of the second radiator 240 between the third slot and the fourth slot.

[0247] It should be understood that, since the second frame 220 is coupled with the floor at the third position 221, the current of the second radiator 240 is stronger near the third position 221, and the current is weaker near the fourth position 222. When the fourth gap is provided in the area with stronger current, the effect of reducing the intensity of a single strong current point of the second radiator 240 is more obvious, and the current distribution of the second radiator 240 is relatively more uniform. Since the current distribution of the second radiator 240 is relatively more uniform, the conductor loss and dielectric loss caused by the conductor and dielectric arranged around the second radiator 240 and the second radiator 240 are smaller. In one embodiment, the current distribution of the second radiator 240 is relatively more uniform, the radiation aperture of the second radiator 240 is improved more significantly, and the effect of improving the system efficiency and radiation efficiency of the antenna is better.

[0248] In one embodiment, the first radiator 230 and the second radiator 240 are disposed adjacent to each other in the first direction (for example, no other conductor is disposed between the first radiator 230 and the second radiator 240). In one embodiment, when the first frame 210 is provided with a slit at the first position / the second position 212, the slit provided in the first frame 210 is aligned with the third slit or the fourth slit, so that when an electrical signal is fed, the third slit or the fourth slit can couple to more energy through the electric field at the slit provided in the first frame 210, thereby improving the radiation characteristics of the parasitic resonance generated by the second radiator.

[0249] It should be understood that in the embodiment of the present application, alignment can be understood as two slots at least partially overlapping in the first direction. When the two slots completely overlap in the first direction, the radiation characteristics of the parasitic resonance generated by the second radiator are optimal.

[0250] In one embodiment, the first radiator 230 and the second radiator 240 are spaced apart in the first direction (for example, other conductors are arranged between the first radiator 230 and the second radiator 240, for example, in a multi-fold electronic device, the first radiator 230 and the second radiator 240 are arranged on non-adjacent shells). In one embodiment, when the first frame 210 is provided with a gap at the first position / second position 212, the gap provided in the first frame 210 is aligned with the third gap or the fourth gap, so that when an electrical signal is fed, the third gap or the fourth gap can be coupled to more energy through the electric field at the gap provided in the first frame 210, thereby improving the radiation characteristics of the resonance generated by the second radiator.

[0251] In one embodiment, a second feeding point may be further provided on the second radiator 240. When the foldable electronic device 100 is in the unfolded state, the second radiator 240 may be fed with an electrical signal by the second feeding point and may serve as a main radiation branch. At the same time, in one embodiment, when the foldable electronic device 100 is in the folded state, the second radiator 240 may be fed with an electrical signal by the second feeding point as a parasitic branch in the antenna 200 and also as a main radiation branch of other antennas, and the embodiment of the present application does not limit this.

[0252] Fig.11 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0253] like Fig.11 As shown, the first frame 210 is coupled to the floor at a first position 211 and has a second gap at a second position 212. The second frame 220 is coupled to the floor at a third position 221 and has a third gap at a fourth position 222.

[0254] It should be understandable that Fig.10 The two-dimensional schematic diagram shown, and Fig.11 In the three-dimensional schematic diagram shown, the second gap at the second position 212 and the fourth gap between the coupling points 241 and 242 can be aligned in the folded state to meet the appearance consistency requirements of the electronic device. In the two-dimensional and three-dimensional schematic diagrams of other embodiments of the present application, the gaps set on different frames can be understood similarly. For example, the gaps are staggered in the three-dimensional diagram to more conveniently display the radiator structures on different frames of the foldable electronic device 100.

[0255] In one embodiment, the width of the second gap / the third gap / the fourth gap is greater than or equal to 0.1 mm and less than or equal to 2 mm. It should be understood that the width of the gaps provided on the frame in the embodiment of the present application can be within the above range.

[0256] In one embodiment, the antenna 200 further includes a second element 253. The second radiator 240 includes a third coupling point 243. A first end of the second element 253 is coupled to the third coupling point 243, and a second end of the second element 253 is coupled to the floor.

[0257] It should be understood that in the technical solution provided in the embodiment of the present application, the second radiator 240 is coupled to the floor through the second element 253 at the third coupling point 243, and / or a fourth gap is set between the first coupling point 241 and the second coupling point 242 and the first element 252 is coupled and connected between the first coupling point 241 and the second coupling point 242, which can improve the system efficiency and radiation efficiency of the antenna. Through the setting of the first element 252 and / or the second element 253, the current density on the second radiator 240 can be dispersed (for example, the intensity of a single current strong point is reduced to make the current more evenly distributed). In one embodiment, the current distribution of the second radiator 240 is relatively more uniform, which can reduce the conductor loss and dielectric loss caused by the conductor and dielectric arranged around the second radiator 240. In one embodiment, the current distribution of the second radiator 240 is relatively more uniform, which can increase the radiation aperture of the second radiator 240.

[0258] In one embodiment, the electric field generated by the second radiator 240 is in the same direction from the first end to the second end of the second radiator 240 .

[0259] In one embodiment, the current on the second radiator 240 can be reversed in the area near the third coupling point 243, so that the electric field generated by the second radiator 240 is continuous. Therefore, the electric field cannot reach the zero point at the third coupling point 243, so that the electric field generated by the radiator is continuous and does not reverse (for example, does not include the electric field reversal area), and there is no zero point. The current density on the total radiator is dispersed, the radiation aperture of the second radiator 240 is increased, and the total radiation aperture of the antenna 200 (the total radiation aperture of the first radiator 230 and the second radiator 240) is equivalently increased, the loss caused by the conductor and the medium is reduced, and the radiation characteristics of the antenna are improved.

[0260] In one embodiment, no switch is provided between the second radiator 240 and the second element 253 (for example, no switch is provided between the third coupling point 243 and the first end of the second element 253), or no switch is provided between the second element 253 and the floor (for example, no switch is provided between the second end of the second element 253 and the floor). The element connected in series between the second radiator 240 and the floor in the embodiment of the present application is used to disperse the current density on the radiator so as to reduce the loss caused by the radiator and the conductor provided around the radiator. In one embodiment, the second element 253 can affect the frequency of the resonance point of the resonance to a certain extent, but it is different from the tuning circuit mainly used to adjust the frequency of the resonance point of the resonance. In addition, no switch is provided at the first element to switch the frequency band, and the switch will introduce additional insertion loss and lose the radiation performance of the antenna.

[0261] In one embodiment, a switch may also be provided between the second radiator 240 and the second element 253 , so that when the antenna 200 operates in different operating frequency bands, the second element 253 with different capacitance values ​​or inductance values ​​is switched.

[0262] In one embodiment, the second radiator 240 may be used to generate a first parasitic resonance. The electrical length of the second radiator 240 may be greater than three eighths of the first wavelength, and the first wavelength may be a wavelength corresponding to the first parasitic resonance.

[0263] It should be understood that the first end of the second radiator 240 is coupled to the floor as a grounding end, and the second end is an open end. The first parasitic resonance of the second radiator 240 may correspond to a quarter-wavelength mode. Through the second element 253 and the fourth gap, the electrical length of the second radiator 240 may be greater than three-eighths of the first wavelength, the current on the second radiator 240 is in the same direction (for example, not reversed), and the electric field between the second radiator 240 and the floor does not reverse. The electrical length of the second radiator 240 increases from a quarter of the first wavelength to more than three-eighths of the first wavelength, but still operates in a quarter-wavelength mode. In this case, the current density on the second radiator 240 is dispersed, and the current density between the second radiator 240 and the floor is weakened, thereby reducing the loss caused by the radiator and the conductor and dielectric arranged around the radiator, thereby improving the radiation characteristics of the antenna 200.

[0264] In one embodiment, the first radiator 230 can be used to generate a first resonance. In one embodiment, a first end of the first radiator 230 is coupled to a floor as a ground end, and a second end is an open end. The first radiator 230 can operate in a quarter wavelength mode. The electrical length of the first radiator is one quarter of the second wavelength, and the second wavelength is the wavelength corresponding to the first resonance.

[0265] In one embodiment, the length of the second frame 220 between the third position 221 and the fourth position 222 is greater than or equal to two fifths of the length of the first frame 210 between the first position 211 and the second position 212 .

[0266] In one embodiment, the electrical length between the third position 221 and the fourth slot is less than one quarter of the first wavelength, and the electrical length between the fourth position 222 and the fourth slot is less than one half of the first wavelength.

[0267] In one embodiment, the first coupling point 241 is located between the third position 221 and the fourth gap, and the second coupling point 242 is located between the fourth position 222 and the fourth gap.

[0268] In one embodiment, the third coupling point 243 may be located between the third position 221 and the first coupling point 241. In one embodiment, the distance between the third coupling point 243 and the first coupling point 241 (e.g., the length of the second radiator between the third coupling point 243 and the first coupling point 241) is greater than or equal to 0 mm and less than or equal to 5 mm.

[0269] It should be understood that when the distance between the third coupling point 243 and the first coupling point 241 is equal to 0 mm, the third coupling point 243 coincides with the first coupling point 241. In one embodiment, the first end of the first element 252 and the first end of the second element 253 can be coupled to the first coupling point 241 (third coupling point 243) through the same connector.

[0270] When the third coupling point 243 can be located between the third position 221 and the first coupling point 241, the first element 252 and the second element 253 are similar to a series relationship. In one embodiment, the second element 253 can be an inductor, which can further increase the radiation aperture of the second radiator. In one embodiment, the second element can be a capacitor, which can be used to reduce the radiation aperture of the second radiator. Through the first element and the second element, the radiation aperture of the second radiator is adjusted at the same time, and the parasitic resonance in the desired frequency band has been achieved.

[0271] In one embodiment, the third coupling point 243 may be located between the fourth position 222 and the second coupling point 242. In one embodiment, the distance between the third coupling point 243 and the second coupling point 242 (e.g., the length of the second radiator between the third coupling point 243 and the second coupling point 242) is greater than or equal to 0 mm and less than or equal to 5 mm.

[0272] It should be understood that when the distance between the third coupling point 243 and the second coupling point 242 is equal to 0 mm, the third coupling point 243 coincides with the second coupling point 242. In one embodiment, the second end of the first element 252 and the first end of the second element 253 can be coupled to the second coupling point 242 (third coupling point 243) through the same connector.

[0273] When the third coupling point 243 can be located between the fourth position 222 and the second coupling point 242, the first element 252 and the second element 253 are similar to a parallel relationship. In one embodiment, the second element 253 can be a capacitor, which can improve the equivalent capacitance between the first coupling point 241 and the third coupling point 253. In one embodiment, when the equivalent capacitance value of the first element 252 is 2pF, the loss is high, and the second element 253 can be used to reduce the loss while ensuring the same effect (for example, the same radiation aperture) (the equivalent capacitance value of the first element 252 is 1pF, the equivalent capacitance value of the second element 253 is 1pF, and the equivalent capacitance value between the first coupling point 241 and the third coupling point 253 is 2pF), thereby improving the radiation characteristics of the antenna. In one embodiment, the second element can be an inductor, which can be used to reduce the radiation aperture of the second radiator. Through the first element and the second element, the radiation aperture of the second radiator is adjusted at the same time, and the parasitic resonance under the desired frequency band has been achieved.

[0274] It should be understood that the third coupling point 243 can be located at any position on the second radiator 240, and the embodiment of the present application does not limit this. When the length of the second radiator between the third coupling point 243 and the first coupling point 241 / the second coupling point 242 is less than or equal to 5 mm, the radiation aperture of the second radiator 240 can be better adjusted to improve the radiation characteristics of the antenna 200.

[0275] In one embodiment, a third coupling point 243 may be provided between the third position 221 and the first coupling point 241 , and between the fourth position 222 and the second coupling point 242 , respectively. Each third coupling point 243 is coupled to the floor through a corresponding second element 253 .

[0276] In one embodiment, a switch may be provided between the first element 252 and / or the second element 253 and the second radiator 240 for positioning the parasitic resonance, or may be understood as being used to switch the radiation aperture of the second radiator 240. The switch may be used to switch the first element 252 and / or the second element 253 having different electrical parameters.

[0277] In one embodiment, the switch can be electrically connected between the first end of the first element 252 and the first coupling point 241 or between the second end of the first element 252 and the second coupling point 242. The switch can be used to switch the first element 252 with different electrical parameters, so that the radiation aperture of the second radiator 240 can be switched.

[0278] In one embodiment, the second element 253 may include an inductor, a capacitor, and a 0 ohm resistor, a switch is provided between the second element 253 and the third coupling point 243, or a switch is provided between the second element 253 and the ground, and the second element 253 or the inductor, capacitor, or 0 ohm resistor is switched by the switch. Alternatively, the switch may be used to switch the position of the third coupling point 243, so that the third coupling point 243 may be located between the fourth position 222 and the second coupling point 242 or between the third position 221 and the first coupling point 241. For example, when the second element 253 is an inductor, the third coupling point 243 is located between the third position 221 and the first coupling point 241, and the radiation aperture of the second radiator 240 increases; when the third coupling point 243 is located between the fourth position 222 and the second coupling point 242, the radiation aperture of the second radiator 240 decreases.

[0279] In one embodiment, the second slit at the second position 212 at least partially overlaps with the fourth slit provided on the second radiator 240 in the first direction (e.g., z direction). Alternatively, the second slit at the second position 212 at least partially overlaps with the third slit at the fourth position 222 in the first direction (e.g., z direction).

[0280] It should be understood that when the second slot at the second position 212 and the third slot (or the third slot at the fourth position 222) partially overlap in the first direction, when the first feeding point 231 feeds an electrical signal, the second radiator 240 can couple more energy through the electric field at the slot, thereby enhancing the resonant radiation characteristics generated by the second radiator.

[0281] In one embodiment, the second element 253 may be an inductor or an element equivalent to an inductor.

[0282] In one embodiment, the equivalent inductance of the second element 253 may be less than or equal to 10 nH.

[0283] It should be understood that by designing the equivalent inductance value of the second element 253 according to the frequency of the resonance point of the different first parasitic resonances, the current distribution on the second radiator 240 can be made more uniform, the conductor loss and the dielectric loss can be reduced, and the radiation aperture of the second radiator 240 can be increased, thereby improving the radiation characteristics of the antenna.

[0284] In one embodiment, the first element 252 may be a capacitor or an element equivalent to a capacitor.

[0285] In one embodiment, the equivalent capacitance value of the first element 252 may be less than or equal to the first threshold value. The first threshold value may be designed according to the resonance point frequency of the first parasitic resonance generated by the second radiator 240. When the resonance point frequency of the first parasitic resonance is less than or equal to 1 GHz, the first threshold value is 10 pF. When the resonance point frequency of the first parasitic resonance is greater than 1 GHz, the first threshold value is 2 pF.

[0286] It should be understood that by designing the equivalent inductance value of the first element 252 according to the frequency of the resonance point of the different first parasitic resonances, the current distribution on the second radiator 240 can be made more uniform, the conductor loss and the dielectric loss can be reduced, and the radiation aperture of the second radiator 240 can be increased, thereby improving the radiation characteristics of the antenna.

[0287] In one embodiment, when the first element 252 is a capacitor, it can be implemented by extending the conductors on both sides of the fourth gap (for example, at the first coupling point 241 and / or the second coupling point 242) into the electronic device to form a distributed capacitor structure, such as Fig.12 In one embodiment, when the first element 252 is an inductor, the metal member electrically connected between the first coupling point 241 and the second coupling point 242 can be equivalent to an inductor, such as Fig.12 It should be understood that for the sake of simplicity, only the first element 252 is used as an example for description, and the elements described in the embodiment of the present application can be implemented by distributed devices or lumped devices.

[0288] Fig.13 It is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0289] like Fig.13 As shown, the foldable electronic device 100 includes an antenna 300 .

[0290] It should be understood that Fig.13 The antenna 300 is shown with Fig.11 The difference of the antenna 200 shown is that the parasitic stub (second radiator) does not include the first coupling point, the second coupling point and the third coupling point, and the first element and the fourth slot are not provided on the second radiator.

[0291] Fig.14 and Fig.15 yes Fig.11 and Fig.13 The simulation results of the antenna shown in Figure 2 are shown in Figure 2. Fig.14 yes Fig.11 and Fig.13 S-parameter simulation results of the antenna shown. Fig.15 yes Fig.11 and Fig.13 Simulation results for the radiation efficiency and system efficiency of the antenna shown.

[0292] like Fig.14 As shown, it is shown Fig.11 and Fig.13 S-parameter simulation results of the antenna shown.

[0293] When the foldable electronic device is in a folded state and the second radiator is not provided, the antenna resonates at around 1.8 GHz only by the first radiator.

[0294] When the foldable electronic device is in the folded state, Fig.13 The antenna 300 shown can generate two resonances near 1.8 GHz and near 1.9 GHz. The resonance near 1.9 GHz (first parasitic resonance) can be generated by the second radiator.

[0295] When the foldable electronic device is in the folded state, Fig.11 The antenna 200 shown can generate two resonances near 1.8 GHz and near 1.9 GHz. The resonance near 1.9 GHz (first parasitic resonance) can be generated by the second radiator. With S11<-5dB as the limit, Fig.11 The operating bandwidth of the antenna 200 is shown as Fig.13 The antenna 300 is shown to have a wider operating bandwidth.

[0296] like Fig.15 As shown, compared with the foldable electronic device being in a folded state and without a second radiator, only the first radiator generates resonance. Fig.11 and Fig.13 The antennas shown all generate resonance by the first radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved.

[0297] exist Fig.11 In the antenna 200 shown, since the second radiator is coupled to the floor through the first element at the first coupling point, when the second radiator is coupled to the energy by the first radiator to generate resonance, the current density on the second radiator can be dispersed, the intensity of a single current strong point can be reduced, and the current can be distributed more evenly, thereby reducing the loss caused by the second radiator and the conductor and dielectric arranged around the second radiator. In addition, the gap provided on the second radiator can further increase the radiation aperture and improve the system efficiency and radiation efficiency of the antenna 200. Therefore, compared with Fig.13 The antenna 300 shown, Fig.11 The radiation efficiency and system efficiency of the antenna 200 shown are high.

[0298] Fig.16 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0299] like Fig.16As shown, the antenna 200 includes a third radiator 250 and a second feeding circuit 254. The third radiator 250 includes a second feeding point 232, and the second feeding circuit 254 is coupled to the second feeding point 232.

[0300] The first frame 210 includes a fifth position 213 and a sixth position 214. The second position 212 is located between the fifth position 213 and the first position 211, and the fifth position 213 is located between the second position 212 and the sixth position 214. The third radiator 250 is a conductive portion between the fifth position 213 and the sixth position 214. In one embodiment, the first frame 210 is coupled to the floor at the fifth position 213, and a fifth gap is provided at the sixth position 214.

[0301] like Fig.17 As shown, when the foldable electronic device 100 is in a folded state, the third radiator 250 and the second radiator 240 at least partially overlap along a first direction, and the first direction is a thickness direction of the foldable electronic device 100, for example, a z direction.

[0302] It should be understood that Fig.17 The antenna 200 is shown with Fig.10 The antenna 200 shown is different only in that a third radiator 250 and a second feeding circuit 254 are added.

[0303] The first radiator 230 and the first feeding circuit 251 may form a first antenna unit. The third radiator 250 and the second feeding circuit 252 may form a second antenna unit. The second radiator 240 may simultaneously serve as a parasitic branch of the first antenna unit and the second antenna unit, and may be used to improve the radiation characteristics of the first antenna unit and the second antenna unit. Furthermore, since the first antenna unit and the second antenna unit may reuse the second radiator 240, the overall structure of the antenna may be miniaturized while simultaneously improving the radiation characteristics of the first antenna unit and the second antenna unit.

[0304] In one embodiment, the second radiator 240 may be used to generate a first parasitic resonance. The first parasitic resonance may be used to improve the radiation characteristics of the first antenna unit and the second antenna unit.

[0305] In one embodiment, the first frame 210 may be coupled to the floor through a grounding piece at the fifth position 213. In one embodiment, the width of the grounding piece may be greater than or equal to 2 mm, so that the first antenna unit and the second antenna unit have good isolation.

[0306] In one embodiment, the third slit at the fourth position 222 at least partially overlaps the fifth slit at the sixth position 214 in the first direction (e.g., z-direction). In one embodiment, the second slit at the second position 212 is aligned with (at least partially overlaps) the fourth slit in the first direction (e.g., z-direction).

[0307] It should be understood that when the corresponding gaps partially overlap in the first direction, the second radiator 240 can couple more energy through the electric field at the gap when an electrical signal is fed into the feeding point, thereby improving the resonant radiation characteristics generated by the second radiator.

[0308] Figures 18 to 20 yes Fig.17 The simulation results of the antenna shown in Figure 2 are shown in Figure 2. Fig.18 yes Fig.17 S-parameter simulation results of the antenna shown. Fig.19 yes Fig.17 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown. Fig. 20 yes Fig.17 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0309] like Fig.18 As shown, it is shown Fig.17 S-parameter simulation results of the antenna shown.

[0310] The first antenna unit (S11) can generate resonances near 1.8 GHz and near 1.92 GHz, wherein the resonance generated near 1.8 GHz can be generated by the first radiator (first resonance), and the resonance generated near 1.92 GHz can be generated by the second radiator (first parasitic resonance).

[0311] The second antenna unit (S22) may generate resonance around 1.56 GHz, and the resonance may be generated by the third radiator (second resonance).

[0312] In the above frequency band, the isolation (S12) between the first antenna unit and the second antenna unit is less than -15dB, and there is good isolation between the two antenna units.

[0313] It should be understood that in the above embodiments, only the different operating frequency bands of the first antenna unit and the second antenna unit are used as an example for explanation, and the first parasitic resonance can be used to expand the operating bandwidth of the first antenna.

[0314] like Fig.19As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and the first antenna only resonating with the first radiator, the first antenna unit resonates with the first radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved.

[0315] Furthermore, when the resonance point of the first parasitic resonance is located at 1.92 GHz, compared with when the first parasitic resonance is located at 2.4 GHz, the system efficiency and radiation efficiency of the first antenna unit are better.

[0316] like Fig. 20 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device not having a second radiator and only resonance being generated by the third radiator, after the second radiator is set, the system efficiency and radiation efficiency of the second antenna unit are improved.

[0317] It should be understood that the resonance point of the first parasitic resonance generated by the second radiator is located at 1.92 GHz or 2.4 GHz, which is far from the resonance point (1.56 GHz) of the second resonance generated by the third radiator. Fig.18 Although not shown in the S-parameters, the first parasitic resonance significantly improves the system efficiency and radiation efficiency of the second antenna unit.

[0318] Fig.21 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0319] like Fig.21 As shown, the third radiator 250 is a conductive portion between the second position 212 and the sixth position 214. The first frame 210 is coupled to the floor at the fifth position 213, and a sixth gap is provided at the sixth position 214.

[0320] The antenna 200 may further include a third element 255. The third radiator 250 may further include a fourth coupling point 244. A first end of the third element 255 is coupled to the fourth coupling point 244, and a second end is coupled to the floor. The third element 255 may be used to enable the third radiator 250 to operate in a DM mode.

[0321] It should be understood that Fig.21 The antenna 200 is shown with Fig.17 The difference between the antenna 200 shown is only that the working mode of the third radiator 250 is different. Fig.17 In the antenna 200 shown, the first end of the third radiator 250 is coupled to the floor as a ground end, and the second end is an open end, which can work in a quarter-wavelength mode. Fig.21 In the antenna 200 shown, the first end and the second end of the third radiator 250 are open ends, forming a T-shaped structure, and working in the line DM mode.

[0322] In one embodiment, the distance between the second position 212 and the fourth coupling point 244 is less than or equal to one half of the distance between the second position 212 and the fifth position 213 .

[0323] In one embodiment, the third element 255 is a capacitor or an element equivalent to a capacitor.

[0324] Figure 22 to Figure 24 yes Fig.21 The simulation results of the antenna shown in Figure 2 are shown in Figure 2. Fig. 22 yes Fig.21 S-parameter simulation results of the antenna shown. Fig.23 yes Fig.21 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown. Fig.24 yes Fig.21 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0325] like Fig. 22 As shown, it is shown Fig.32 S-parameter simulation results of the antenna shown.

[0326] The first antenna unit (S11) can generate resonances near 1.8 GHz and near 1.92 GHz, wherein the resonance generated near 1.8 GHz can be generated by the first radiator (first resonance), and the resonance generated near 1.92 GHz can be generated by the second radiator (first parasitic resonance).

[0327] The second antenna unit (S22) may generate resonance around 1.58 GHz, and the resonance may be generated by the third radiator (second resonance).

[0328] In the above frequency band, the isolation (S12) between the first antenna unit and the second antenna unit is less than -15dB, and there is good isolation between the two antenna units.

[0329] like Fig.23 As shown, when the foldable electronic device is in a folded state, compared with a foldable electronic device that does not have a second radiator and only uses the first radiator to generate resonance, the first antenna unit generates resonance by the first radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved.

[0330] Furthermore, when the resonance point of the first parasitic resonance is located at 1.92 GHz, compared with when the first parasitic resonance is located at 2.4 GHz, the system efficiency and radiation efficiency of the first antenna unit are better.

[0331] like Fig.24As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and the second antenna only resonates with the third radiator, after the second radiator is set, the system efficiency and radiation efficiency of the second antenna unit are improved.

[0332] It should be understood that the resonance point of the first parasitic resonance generated by the second radiator is located at 1.92 GHz or 2.4 GHz, which is far away from the resonance point (1.56 GHz) of the second resonance generated by the third radiator. Fig.18 Although not shown in the S-parameters, the first parasitic resonance significantly improves the system efficiency and radiation efficiency of the second antenna unit.

[0333] Fig.25 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0334] It should be understood that in the above embodiments, only the foldable electronic device 100 including only two housings (for example, a two-fold electronic device) is used as an example for description. In actual production or design, the technical solution provided in the embodiments of the present application can also be applied to a device including multiple housings (for example, a multi-fold electronic device). Fig.25 As shown, the foldable electronic device 100 includes three shells for illustration.

[0335] like Fig.25 As shown, the foldable electronic device 100 may further include a third housing 204 and a second shaft 205. The second shaft 205 is located between the second housing 202 and the third housing 204, and the second shaft 205 is rotatably connected to the second housing 202 and the third housing 204, respectively, so that the second housing 202 and the third housing 204 can rotate relative to each other.

[0336] The third housing 204 may include a third frame 260 .

[0337] The third position 221 and the fourth position 222 may be located at the third frame 260. The fifth position 213 and the sixth position 214 may be located at the second frame 220. The first radiator 210 is a conductive portion between the first position 211 and the second position 212. The second radiator 220 is a conductive portion between the third position 221 and the fourth position 222. The third radiator 250 includes a conductive portion between the fifth position 213 and the sixth position 214.

[0338] It should be understood that Fig.25 The antenna 200 is shown with Fig.16The antenna 200 shown is different only in the third position 221 and the fourth position 222 , and the fifth position 213 and the sixth position 214 . The first radiator 230 and the third radiator 250 are respectively located on the first shell 201 and the second shell 202 , and the second radiator 240 is located on the third shell 204 .

[0339] The first radiator 230 and the second radiator 240 at least partially overlap along a first direction, and the second radiator 240 and the third radiator 250 at least partially overlap along the first direction, where the first direction is the thickness direction of the foldable electronic device 100, for example, the z direction. Fig.26 shown.

[0340] In one embodiment, the third radiator 250 is used to generate the second resonance. In one embodiment, the resonance frequency band of the first resonance generated by the first radiator 230 is the same frequency or adjacent to the resonance frequency band of the second resonance generated by the third radiator 250 .

[0341] It should be understood that, for the sake of simplicity of discussion, the embodiments of the present application are described by taking the case where the resonant frequency band of the first resonance and the resonant frequency band of the second resonance are the same frequency as an example.

[0342] In one embodiment, the resonant frequency band of the first resonance is co-frequency or adjacent to the resonant frequency band of the second resonance, and the first parasitic resonance can be close to the first resonance and the second resonance at the same time, which can be used to simultaneously improve the radiation performance of the first antenna unit and the second antenna unit. In one embodiment, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz, and the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the second resonance is less than or equal to 200 MHz.

[0343] Figure 27 to Figure 29 yes Fig.25 The simulation results of the antenna shown in Figure 2 are shown in Figure 2. Fig. 27 yes Fig.25 S-parameter simulation results of the antenna shown. Fig.28 yes Fig.25 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown. Fig.29 yes Fig.25 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0344] like Fig. 27 As shown, it is shown Fig.25 S-parameter simulation results of the antenna shown.

[0345] The first antenna unit (S11) can generate resonances near 1.95 GHz and near 2.15 GHz, wherein the resonance near 1.95 GHz can be generated by the first radiator (first resonance), and the resonance near 2.15 GHz can be generated by the second radiator (first parasitic resonance).

[0346] The second antenna unit (S22) can generate resonances near 1.95 GHz and near 2.15 GHz, wherein the resonance generated near 1.95 GHz can be generated by the third radiator (second resonance), and the resonance generated near 2.15 GHz can be generated by the second radiator (first parasitic resonance).

[0347] In the above-mentioned frequency band, since the first antenna unit and the second antenna unit reuse the first parasitic resonance generated by the second radiator to expand the working bandwidth, the isolation (S12) between the first antenna unit and the second antenna unit is reduced compared with the above-mentioned embodiment, and the isolation between the first antenna unit and the second antenna unit is less than -9dB.

[0348] It should be understood that in the above embodiments, only the first antenna unit and the second antenna unit are of the same frequency as an example for description, and the first antenna unit and the second antenna unit may include the same communication frequency band as subunits in the MIMO system.

[0349] like Fig.28 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and only resonance generated by the first radiator, the first antenna unit resonates by the first radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved, the system efficiency is improved by about 1.5dB, and the radiation efficiency is improved by about 1dB.

[0350] like Fig.29 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and only resonance generated by the third radiator, the second antenna unit resonates by the third radiator and the second radiator, and both the system efficiency and radiation efficiency are improved, the system efficiency is improved by about 2.5dB, and the radiation efficiency is improved by about 2dB.

[0351] Fig.30 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0352] like Fig.30 As shown, the second frame 220 is provided with a fifth gap and a sixth gap at the fifth position 213 and the sixth position 214, respectively. The second frame 220 between the fifth position 213 and the sixth position 214 includes a grounding point, and the second frame 220 is coupled to the floor at the grounding point.

[0353] In one embodiment, the grounding point may be located in the central area of ​​the second frame 220 between the fifth position 213 and the sixth position 214. The central area may be understood as an area within 5 mm from the center, and the physical length between the center and the fifth position 213 is the same as the physical length between the center and the sixth position 214, or the electrical length between the center and the fifth position 213 is the same as the electrical length between the center and the sixth position 214.

[0354] It should be understood that Fig.26 In the antenna 200 shown, the first end of the third radiator 250 is coupled to the floor as a ground end, and the second end is an open end, which can work in a quarter-wavelength mode. Fig.30 In the antenna 200 shown, the first end and the second end of the third radiator 250 are open ends, forming a symmetrical T-shaped structure, and working in the line CM mode.

[0355] In one embodiment, the current on the third radiator 250 is distributed in opposite directions on both sides of the ground point, for example, symmetrically distributed. Correspondingly, the third radiator 250 can operate in a line CM mode.

[0356] Figure 31 to Figure 33 yes Fig.30 The simulation results of the antenna shown in Figure 2 are shown in Figure 2. Fig.31 yes Fig.30 S-parameter simulation results of the antenna shown. Fig.32 yes Fig.30 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown. Fig.33 yes Fig.30 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0357] like Fig.31 As shown, it is shown Fig.30 S-parameter simulation results of the antenna shown.

[0358] The first antenna unit (S11) can generate resonances near 1.9 GHz and near 2.15 GHz, wherein the resonance generated near 1.9 GHz can be generated by the first radiator (first resonance), and the resonance generated near 2.15 GHz can be generated by the second radiator (first parasitic resonance).

[0359] The second antenna unit (S22) may generate resonance around 1.95 Hz, and the resonance may be generated by the third radiator (second resonance).

[0360] It should be understood that the third radiator works in the line CM mode, and the current on the third radiator is distributed in the opposite direction, such as symmetrically. The second radiator works in the quarter-wavelength mode, and the current on the second radiator is distributed in the same direction. Therefore, when the third radiator is fed with an electrical signal, it cannot excite the second radiator to produce the first parasitic resonance, and the second antenna unit cannot use the first parasitic resonance to expand the working bandwidth. However, since the second antenna unit cannot use the first parasitic resonance, the isolation (S12) between the first antenna unit and the second antenna unit is good, less than -13dB.

[0361] like Fig.32 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and only resonance generated by the first radiator, the first antenna unit resonates by the first radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved, the system efficiency is improved by about 3dB, and the radiation efficiency is improved by about 1.5dB.

[0362] like Fig.33 As shown, since the second antenna unit cannot utilize the first parasitic resonance, the system efficiency and radiation efficiency of the second antenna unit are not significantly improved.

[0363] Fig.34 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0364] like Fig.34 As shown, the antenna 200 may further include a third element 255. The third radiator 250 may further include a fourth coupling point 244, which is located between the fifth position 213 and the ground point. The first end of the third element 255 is coupled to the fourth coupling point 244, and the second end is coupled to the ground.

[0365] It should be understood that compared to Fig.30 The antenna 200 shown, Fig.34 The antenna 200 shown differs only in that a third element 255 is provided. Fig.30 In the antenna 200 shown, the third radiator 250 can work in the line CM mode, and the current on the third radiator 250 is distributed in opposite directions on both sides of the ground point, for example, symmetrically. Fig.34 In the antenna 200 shown, the third element 255 can be used to change the boundary conditions of the third radiator 250 so that the third radiator 250 can operate in the line DM mode, and the current on the third radiator 250 is distributed in the same direction on both sides of the grounding point, such as an anti-symmetric distribution.

[0366] In one embodiment, the distance between the fifth position 213 and the fourth coupling point 244 is less than or equal to one half of the distance between the fifth position 213 and the ground point.

[0367] Figure 35 to Figure 37 yes Fig.34 The simulation results of the antenna shown in Figure 2 are shown in Figure 2. Fig.35 yes Fig.34 S-parameter simulation results of the antenna shown. Fig.36 yes Fig.34 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown. Fig.37 yes Fig.34 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0368] like Fig.35 As shown, it is shown Fig.34 S-parameter simulation results of the antenna shown.

[0369] The first antenna unit (S11) can generate resonances near 1.95 GHz and near 2.2 GHz, wherein the resonance near 1.95 GHz can be generated by the first radiator (first resonance), and the resonance near 2.2 GHz can be generated by the second radiator and the third element 255 (first parasitic resonance).

[0370] The second antenna unit (S22) can generate resonances near 1.95 GHz and near 2.2 GHz, wherein the resonance generated near 1.95 GHz can be generated by the third radiator (second resonance), and the resonance generated near 2.2 GHz can be generated by the second radiator and the third element 255 (first parasitic resonance).

[0371] In the above-mentioned frequency band, since the first antenna unit and the second antenna unit reuse the first parasitic resonance generated by the second radiator to expand the working bandwidth, the isolation (S12) between the first antenna unit and the second antenna unit is reduced compared with the above-mentioned embodiment, and the isolation between the first antenna unit and the second antenna unit is less than -8dB.

[0372] like Fig.36 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device not having a second radiator and only having resonance generated by the first radiator, the first antenna unit has resonance generated by the first radiator and the second radiator, and the system efficiency and radiation efficiency are roughly the same.

[0373] like Fig.37 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and only resonance generated by the first radiator, the second antenna unit resonates with the third radiator and the second radiator, and both the system efficiency and radiation efficiency are improved, the system efficiency is improved by about 3.5dB, and the radiation efficiency is improved by about 2dB.

[0374] It should be understood that see Fig.32, Fig.33 as well as Fig.36 , Fig.37 The simulation results shown in the figure show that when the third radiator works in CM mode, the second radiator acts as a parasitic branch to improve the system efficiency and radiator efficiency of the first antenna unit; when the third radiator works in DM mode, the second radiator acts as a parasitic branch to improve the system efficiency and radiator efficiency of the second antenna unit.

[0375] Fig.38 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0376] It should be understood that in the above embodiments, when the antenna 200 includes the third radiator 250, the first radiator 230 and the third radiator 250 are described as not overlapping in the first direction, and the first direction is the thickness direction of the foldable electronic device 100, for example, the z direction. Fig.38 In the foldable electronic device 100 shown, the first radiator 230 and the third radiator 250 at least partially overlap along the first direction.

[0377] In one embodiment, the first end of the first radiator 230 is an open end, and the second end is an open end. The second frame 220 between the first position 211 and the second position 212 includes a grounding point, and the second frame 220 is coupled to the floor at the grounding point to achieve grounding.

[0378] In one embodiment, a fourth coupling point 244 is further provided between the ground point and the second position 212, and a fifth coupling point 245 is further provided between the feeding point and the ground point. A first end of the first tuning device 256 is coupled to the fourth coupling point 244, and a second end is coupled to the floor. A first end of the second tuning device 257 is coupled to the fifth coupling point 245, and a second end is coupled to the floor. The first tuning device 256 and the second tuning device 257 can be used to adjust the radiation characteristics of the first radiator 230, for example, can be used to adjust the working mode of the first radiator.

[0379] For the sake of simplicity, the first radiator 230 can work in the line DM mode as an example. In actual applications, the first tuning device 256 and the second tuning device 257 can make the first radiator 230 work in different working modes. In one embodiment, adjusting the first tuning device 256 and the second tuning device 257 can make the first radiator 230 work in the line CM mode. In one embodiment, when the first tuning device 256 is equivalent to a short circuit, the first radiator 230 can generate radiation from the portion between the first position 211 and the grounding point, and work in a quarter-wavelength mode. In one embodiment, when the first tuning device 256 is equivalent to a short circuit, the second tuning device 257 is adjusted, and the portion between the first position 211 and the grounding point of the first radiator 230 can form a slot antenna structure at the first border on the other side of the first position 211, and work in the slot CM mode or the slot DM mode.

[0380] In one embodiment, the distance between the fourth coupling point 244 and the second position 212 is less than half the distance between the ground point and the second position 212. In one embodiment, the distance between the fifth coupling point 245 and the first position 211 is less than half the distance between the ground point and the first position 211.

[0381] In one embodiment, the first end of the third radiator 250 is an open end, and the second end is an open end. The second frame 220 between the fifth position 213 and the sixth position 214 includes a grounding point, and the second frame 220 is coupled to the floor at the grounding point to achieve grounding, so that the third radiator 250 can work in the line CM mode.

[0382] Figure 39 to Figure 41 yes Fig.38 The simulation results of the antenna shown in Figure 2 are shown in Figure 2. Fig.39 yes Fig.38 S-parameter simulation results of the antenna shown. Fig.40 yes Fig.38 Simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown. Fig.41 yes Fig.38 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0383] like Fig.39 As shown, it is shown Fig.38 S-parameter simulation results of the antenna shown.

[0384] When the second radiator is not provided, the first antenna unit (S11) may generate resonances near 1.6 GHz and 1.7 GHz. The resonance generated near 1.6 GHz may be generated by the line CM mode of the first radiator, and the resonance generated near 1.7 GHz may be generated by the line DM mode of the first radiator (first resonance). When the second radiator is provided, the first antenna unit (S11) may additionally generate a new resonance (first parasitic resonance) near 2 GHz by the second radiator.

[0385] The second antenna unit (S22) may generate resonance around 1.6 GHz, and the resonance may be generated by the third radiator (second resonance).

[0386] In the above frequency band, the isolation (S12) between the first antenna unit and the second antenna unit is less than -10dB, and there is good isolation between the two antenna units.

[0387] like Fig.40 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and only resonance generated by the first radiator, the first antenna unit resonates by the first radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved, the system efficiency is improved by about 1.5dB, and the radiation efficiency is improved by about 1.5dB.

[0388] like Fig.41 As shown, when the foldable electronic device is in a folded state, compared with the foldable electronic device without a second radiator and only resonance generated by the first radiator, the second antenna unit resonates by the third radiator, and both the system efficiency and the radiation efficiency are improved, the system efficiency is improved by about 2dB, and the radiation efficiency is improved by about 2dB.

[0389] It should be understood that the resonance point of the first parasitic resonance generated by the second radiator is located at 2 GHz, which is far away from the resonance point (1.6 GHz) of the second resonance generated by the third radiator. Fig.39 Although not shown in the S-parameters, the first parasitic resonance significantly improves the system efficiency and radiation efficiency of the second antenna unit.

[0390] Fig.42 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0391] It should be understood that in the above embodiment, only one second element 253 is used as an example for the antenna 200 to be described. In actual production or design, multiple second elements 253 may also be included, such as Fig.42As shown. The multiple second elements 253 can further disperse the current density on the second radiator 240 (for example, reduce the intensity of a single current strong point, so that the current is more evenly distributed), thereby reducing the loss caused by the second radiator 240 and the conductors arranged around the second radiator 240. In one embodiment, the current distribution of the second radiator 240 is relatively more uniform, which can increase the radiation aperture of the second radiator 240. Therefore, the multiple second elements 253 can further improve the system efficiency and radiation efficiency of the antenna.

[0392] In one embodiment, the second radiator 240 may also be provided with a plurality of fourth slits, which may reduce the intensity of a single current strong point of the second radiator 240 and make the current more evenly distributed. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which may reduce the conductor loss and dielectric loss caused by the second radiator 240 and the conductor and dielectric disposed around the second radiator 240. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which may increase the radiation aperture of the second radiator 240. Therefore, a fourth slit is provided between the first coupling point 241 and the second coupling point 242, and the first element 252 is coupled and connected, which may improve the system efficiency and radiation efficiency of the antenna. In one embodiment, the first element 252 may be electrically connected between the conductors on both sides of each fourth slit.

[0393] In one embodiment, when the second radiator 240 is a T-shaped structure, the plurality of second elements 253 may be located on both sides of the grounding point, with some being located between the grounding point and the third position and some being located between the grounding point and the fourth position.

[0394] In one embodiment, the second radiator 240 may operate in a line CM-DM mode.

[0395] Fig.43 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0396] It should be understood that in the above embodiment, only the structure of the second radiator 240 forming a linear antenna (for example, the first end and the second end of the second radiator 240 are both open ends, or one end is a ground end) is used as an example for description. In actual production or design, the second radiator 240 forms a slot antenna structure (for example, the first end and the second end of the second radiator 240 are both coupled to the floor as the ground end), such as Fig.43 shown.

[0397] like Fig.43 As shown, the second frame 220 is coupled to the floor at a third position 221 and a fourth position 223 .

[0398] In one embodiment, the second radiator 240 may also operate in the slot CM-DM mode.

[0399] Fig.44 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0400] It should be understood that in the above embodiment, only the example of electrically connecting the parasitic branch (for example, the second radiator 240) to the floor is used for illustration. In actual production or design, the main radiation branch (for example, the first radiator 230) and the floor may also be electrically connected to a component, such as Fig.44 As shown. The element electrically connected between the main radiation branch and the floor can be used to disperse the current density on the main radiation branch (for example, reduce the intensity of a single current strong point to make the current more evenly distributed), thereby reducing the loss caused by the conductor and dielectric arranged around the main radiation branch, and making the current more evenly distributed. In one embodiment, the current distribution of the first radiator 230 is relatively more uniform, which can reduce the conductor loss and dielectric loss caused by the first radiator 230 and the conductor and dielectric arranged around the first radiator 230. In one embodiment, the current distribution of the first radiator 230 is relatively more uniform, which can increase the radiation aperture of the first radiator 230. Therefore, the system efficiency and radiation efficiency of the antenna can be further improved.

[0401] In one embodiment, the main radiation branch (for example, the first radiator 230) may also be provided with at least one gap, which may reduce the intensity of a single current strong point of the first radiator 230 and make the current more evenly distributed. In one embodiment, the current distribution of the first radiator 230 is relatively more uniform, which may reduce the conductor loss and dielectric loss caused by the first radiator 230 and the conductors and dielectrics arranged around the first radiator 230. In one embodiment, the current distribution of the first radiator 230 is relatively more uniform, which may increase the radiation aperture and improve the system efficiency and radiation efficiency of the antenna. In one embodiment, an element may be electrically connected between the conductors on both sides of each gap to determine the equivalent capacitance value of the gap.

[0402] It should be understood that the specific antenna structure in which the slot is provided on the first radiator 230 may refer to the specific structure in which the slot is provided on the second radiator 240 .

[0403] In one embodiment, the first frame 210 is coupled to the floor at a first position 211 and has a second gap at a second position 212 .

[0404] The first radiator 230 may include coupling points A and B. The first radiator 230 is provided with a gap C between the coupling points A and B. The first end of the element D is coupled to the coupling point A, and the second end of the element D is coupled to the coupling point B.

[0405] In one embodiment, element D can be used to adjust the equivalent capacitance between coupling point A and coupling point B, thereby adjusting the radiation characteristics of the first radiator (for example, the resonant frequency point generated). In one embodiment, the distance between coupling point A and coupling point B and gap C is less than or equal to 5 mm. Among them, the distance between coupling point A and coupling point B and gap C can be understood as the minimum distance between coupling point A and coupling point B and the conductors on both sides of gap C. When element D is electrically connected to coupling point A and coupling point B through a metal spring, the distance between gap C can be understood as the minimum distance between the center of the part where the metal spring contacts the coupling point and the conductors on both sides of gap C.

[0406] It should be understood that the equivalent capacitance between the coupling point A and the coupling point B can be understood as the distributed capacitance formed by the gap C and the capacitance equivalent to the element D connected in parallel. The capacitance value of the equivalent capacitance can be determined by the electrical parameters of the element D (e.g., the equivalent capacitance value) and the electrical parameters of the gap C (e.g., the width of the gap C, the relative dielectric constant of the medium filled in the gap C).

[0407] In one embodiment, the length of the first radiator 230 between the first position 211 and the gap C is smaller than the length of the first radiator 230 between the second gap and the gap C.

[0408] According to the embodiment of the present application, since the first frame is coupled with the floor at the first position 211, the current near the first position 211 is relatively strong, and the current near the second position 212 is relatively weak when the gap C is provided in the area where the current is relatively strong on the first radiator 230, the effect of reducing the intensity of a single current strong point of the first radiator through the gap C is more obvious, and the current distribution of the first radiator is relatively more uniform.

[0409] In one embodiment, the gap C is provided between the midpoint of the first radiator 230 and the ground end (e.g., the first position 211), for example, the length of the first radiator 230 between the first position 211 and the gap C is less than the length of the first radiator 230 between the second gap and the gap C.

[0410] In one embodiment, the gap C is provided between the midpoint of the first radiator 230 and the ground end (e.g., the first position 211), and the length of the first radiator 230 between the first position 211 and the gap C is less than or equal to three-fifths of the length of the first radiator 230 between the second gap and the gap C.

[0411] In one embodiment, the gap C is provided between the midpoint of the first radiator 230 and the ground end (e.g., the first position 211), and the length of the first radiator 230 between the first position 211 and the gap C is less than or equal to one third of the length of the first radiator 230 between the second gap and the gap C.

[0412] In one embodiment, the gap C is provided between the midpoint of the first radiator 230 and the ground end (e.g., the first position 211), and the length of the first radiator 230 between the first position 211 and the gap C is less than or equal to one seventh of the length of the first radiator 230 between the second gap and the gap C.

[0413] It should be understood that the position where the above-mentioned gap C is set, for the area where the current of the first radiator 230 is larger, should be understood as corresponding to the first radiator 230 without a gap (for example, working in a quarter-wavelength mode). After the gap C is set, the current intensity at the corresponding position becomes weaker, achieving the effect of evenly dispersing the current.

[0414] In one embodiment, the first radiator 230 and the element D are used to generate a first resonance.

[0415] In one embodiment, the antenna 200 further includes an element E. The first radiator 240 includes a coupling point F. The first end of the element E is coupled to the coupling point F, and the second end of the element E is coupled to the floor. It should be understood that the position where the element E is arranged on the first radiator 230 can refer to the position where the second element 253 is arranged on the second radiator 240. The role and effect of the element E on the first radiator 230 can refer to the role and effect of the second element 253 on the second radiator 240. No further description is given here.

[0416] Fig.44 The structures related to the first radiator in the illustrated embodiment (for example, the coupling points A and B set on the first radiator and the gap C and element D set between the coupling points A and B, and / or the coupling point F set on the first radiator 240 and the element E coupled to the coupling point F at one end) can be applied to other embodiments of the present application, replacing the first radiator structure in other embodiments.

[0417] Figure 45 to Figure 47 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0418] It should be understood that when the antenna 200 includes three radiators (e.g., a first radiator 230, a second radiator 240, and a third radiator 250), in the above embodiment, only one of the radiators is shown as a parasitic branch (e.g., the second radiator 240) to enhance the radiation characteristics of the antenna unit formed by the two main radiators (e.g., the first radiator 230 and the third radiator 250).

[0419] like Fig.45 As shown, the first frame 210 is coupled to the floor at the first position 211 and has a break at the second position 212. The second frame 220 is coupled to the floor at the fifth position 213 and has a sixth gap at the sixth position 214. The third frame 260 is coupled to the floor at the third position 221 and has a third gap at the fourth position 222.

[0420] For the sake of simplicity of discussion, the embodiments of the present application only illustrate the example in which the first ends of the first radiator 230, the second radiator 240 and the third radiator 250 are all open ends and the second ends are coupled to the floor as grounding ends. In actual production or design, the first end and the second end of the first radiator 230, the second radiator 240 and the third radiator 250 can be set according to actual production.

[0421] In one embodiment, the first radiator 230, the second radiator 240 and the third radiator 250 may operate in a quarter-wavelength mode. It should be understood that in actual production or design, the operating modes of the first radiator 230, the second radiator 240 and the third radiator 250 are not limited.

[0422] In one embodiment, the first radiator 230 can be used to generate a first resonance. The second radiator 240 can be used to generate a first parasitic resonance. The third radiator 250 can be used to generate a second parasitic resonance. In one embodiment, the first parasitic resonance and the second parasitic resonance can form a resonance frequency band together with the first resonance.

[0423] In one embodiment, the second slit at the second position 212 , the third slit at the fourth position 222 , and the sixth slit at the sixth position 214 at least partially overlap in the first direction (eg, z-direction).

[0424] It should be understood that when the above-mentioned gaps partially overlap in the first direction, when the first feeding point feeds an electrical signal, the second radiator and the third radiator can couple more energy through the electric field at the gap, thereby enhancing the resonant radiation characteristics generated by the second radiator and the third radiator.

[0425] like Fig.46 As shown, compared to Fig.45In the antenna 200 shown, at least one second element 253 may be electrically connected between the second radiator 240 and the floor. The second element 253 may disperse the intensity of a single current strong point on the second radiator 240, so that the current is more evenly distributed. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which may reduce the loss caused by the second radiator 240 and the conductor and dielectric disposed around the second radiator 240. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which may increase the radiation aperture of the second radiator 240, thereby improving the system efficiency and radiation efficiency of the antenna.

[0426] In one embodiment, at least one fourth slot may be further provided in the second radiator 240. In one embodiment, the first element 252 may be electrically connected between the conductors on both sides of each fourth slot.

[0427] like Fig.47 As shown, compared to Fig.46 In the antenna 200 shown, at least one second element 253 may be coupled and connected between the third radiator 250 and the floor. The second element 253 may disperse the current density on the third radiator 250 (for example, reduce the intensity of a single current strong point, so that the current is more evenly distributed), so that the current is more evenly distributed. In one embodiment, the current distribution of the third radiator 250 is relatively more uniform, which can reduce the loss caused by the third radiator 250 and the conductors arranged around the third radiator 250. In one embodiment, the current distribution of the third radiator 250 is relatively more uniform, which can increase the radiation aperture of the third radiator 250, thereby improving the system efficiency and radiation efficiency of the antenna.

[0428] In one embodiment, the third radiator 250 may further be provided with at least one fourth slot. In one embodiment, the first element 252 may be electrically connected between the conductors on both sides of each fourth slot.

[0429] It should be understood that the first element 252 coupled to the third radiator 250 and the first element 252 coupled to the second radiator 240; the second element 253 that can be coupled and connected between the third radiator 250 and the floor, and the second element 253 that can be coupled and connected between the second radiator 240 and the floor; wherein, for the sake of simplicity, the first element and the second element are both represented by the same figure mark because they correspond to the first element and the second element described above, respectively, and do not mean that the first elements (or, the second elements) coupled to the two radiators are of the same type and / or the same capacitance-inductance value. In one embodiment, the first element 252 coupled to the third radiator 250 can be the above-mentioned capacitance element, and the first element 252 coupled to the second radiator 240 can be the above-mentioned inductance element, and vice versa; the second element 253 should also be understood in the same way. Fig.47 In the illustrated embodiment, when the foldable electronic device 100 is in a folded state, the third radiator 250 and the second radiator 240 both partially overlap with the first radiator 230 in a first direction, where the first direction is the thickness direction of the foldable electronic device 100, for example, the z direction; and the third radiator 250 is disposed between the second radiator 240 and the first radiator 230 in the first direction.

[0430] In one embodiment, the first radiator 230 and the third radiator 250 may be spaced apart in the first direction (for example, other conductors are disposed between the first radiator 230 and the third radiator 250; for example, in a multi-fold electronic device, the first radiator 230 and the second radiator 240 are disposed on non-adjacent shells).

[0431] In one embodiment, the second radiator 240 and the third radiator 250 may be spaced apart in the first direction (for example, other conductors are disposed between the second radiator 240 and the third radiator 250; for example, in a multi-fold electronic device, the first radiator 230 and the second radiator 240 are disposed on non-adjacent shells).

[0432] Reference again Fig.47 In the illustrated embodiment, when the foldable electronic device 100 is in a folded state, in one embodiment, the second radiator 240 and the first radiator 230 are both located at the outermost shell of the electronic device 100 in the first direction.

[0433] In one embodiment, the first radiator 230 is used to generate a first resonance, the second radiator 240 and the corresponding first element 252 are used to generate a first parasitic resonance, and the third radiator 250 and the corresponding first element 252 are used to generate a second parasitic resonance.

[0434] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 600 MHz-1.5 GHz.

[0435] The frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance may be less than or equal to 200 MHz, or, in one embodiment, the resonance frequency band of the antenna 200 includes any operating frequency band within 600 MHz-1.5 GHz, and the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance may also be less than or equal to 100 MHz; and / or,

[0436] The frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance may be less than or equal to 350 MHz; or the frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance is between 150 MHz and 350 MHz (including the endpoints).

[0437] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 1.5 GHz-3 GHz.

[0438] The frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance may be less than or equal to 400 MHz, or, in one embodiment, the resonance frequency band of the antenna 200 includes any operating frequency band within 1.5 GHz-3 GHz, and the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance may also be less than or equal to 200 MHz; and / or,

[0439] The frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance may be less than or equal to 600 MHz; or the frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance is between 200 MHz and 450 MHz (including the end points).

[0440] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 3 GHz-6 GHz.

[0441] The frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance may be less than or equal to 600 MHz, or, in one embodiment, the resonance frequency band of the antenna 200 includes any operating frequency band within 3 GHz-6 GHz, and the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance may be less than or equal to 400 MHz; and / or,

[0442] The frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance may be less than or equal to 900 MHz; or the frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance is between 350 MHz and 700 MHz (including the end points).

[0443] It should be understood that the resonance point of the first parasitic resonance, the resonance point of the first resonance, and the resonance point of the second parasitic resonance can be adjusted according to the actual production design. In one embodiment, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than the frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance, thereby optimizing the efficiency pit and improving the system efficiency of the antenna.

[0444] Fig.48 and Fig.49 yes Fig.47 The simulation results of the antenna shown in Figure 2 are as follows. Fig.48 yes Fig.47 S-parameter simulation results of the antenna shown. Fig.49 yes Fig.47 Simulation results for the radiation efficiency and system efficiency of the antenna shown.

[0445] like Fig.48 As shown, it is shown Fig.47 S-parameter simulation results of the antenna shown.

[0446] When the foldable electronic device is in a folded state and the second radiator and the third radiator are not provided, the antenna resonates only by the first radiator at around 1.96 GHz.

[0447] When the foldable electronic device is in a folded state and the second radiation is not set, the antenna can generate resonance by the first radiator and the third radiator, and generate two resonances near 1.96 GHz and near 2.16 GHz. The resonance near 2.16 GHz (the first parasitic resonance) can be generated by the third radiator.

[0448] When the foldable electronic device is in a folded state, the antenna can resonate with the first radiator, the second radiator and the third radiator. The antenna 200 can resonate near 1.96 GHz and near 2.16 GHz. The second parasitic resonance generated by the second radiator can jointly generate a resonant frequency band with the first parasitic resonance generated by the third radiator, and the first parasitic resonance and the second parasitic resonance cannot be distinguished.

[0449] Taking S11<-3dB as the boundary, the working bandwidth of the antenna of the foldable electronic device when it is in the unfolded state is smaller than the working bandwidth of the antenna when the foldable electronic device is in the partially unfolded state and smaller than the working bandwidth of the antenna when the foldable electronic device is in the folded state.

[0450] like Fig.49 As shown, compared with a foldable electronic device without parasitic branches (for example, the second radiator and the third radiator), when the foldable electronic device is provided with parasitic branches, the radiation characteristics of the antenna are improved by the parasitic branches, and both the system efficiency and the radiation efficiency are improved.

[0451] Figure 50 to Figure 52 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0452] like Fig.50 As shown, the third position 221, the fourth position 222, the fifth position 213 and the sixth position 214 may be located on the second frame 220. The second radiator 240 at least partially overlaps the first radiator 230 in the first direction, and the third radiator 250 does not completely overlap the first radiator 230 in the first direction.

[0453] The second radiator 240 includes a first connection position 249, and the third radiator 250 includes a second connection position 259. The antenna 200 may further include a fourth element 256. The first end of the fourth element 256 is coupled to the first connection position 249, and the second end is coupled to the second connection position 259.

[0454] It should be understood that Figures 45 to 48 In the antenna 200 shown, the second radiator 240 and the third radiator 250 as parasitic branches are respectively located on different housings and at least partially overlap with the first radiator 230 as the main radiating branch in the first direction, generating resonance through indirect coupling. Fig.50 In the antenna 200 shown, the second radiator 240 and the third radiator 250 are respectively located on the same housing, and the second radiator 240 generates resonance by indirect coupling. The third radiator 250 is coupled to the first connection position 249 of the second radiator 240 through the second connection position 259, and indirectly coupled with the second radiator 240, thereby generating resonance.

[0455] In one embodiment, the fourth element 256 can be used to adjust the phase difference between the electrical signal at the first connection position 249 and the electrical signal at the second connection position 259, thereby enhancing the indirect coupling between the third radiator 250 and the second radiator 240, making the third radiator 250 more fully excited and improving the radiation performance.

[0456] In one embodiment, the fourth position 222 is located between the third position 221 and the fifth position 213, and the fifth position 213 is located between the sixth position 214 and the fourth position 222. Fig.50 In one embodiment, the second frame 220 between the fourth position 222 and the fifth position 213 is coupled to the floor.

[0457] In one embodiment, the fourth position 222 and the fifth position 213 are the same. Fig.51 In one embodiment, the second end of the second radiator 240 is opposite to the first end of the third radiator 250 and they do not contact each other.

[0458] like Fig.51 As shown, compared to Fig.50In the antenna 200 shown, at least one second element 253 may be electrically connected between the third radiator 250 and the floor. The second element 253 may disperse the intensity of a single current strong point on the third radiator 250, so that the current is more evenly distributed. In one embodiment, the current distribution of the third radiator 250 is relatively more even, which may reduce the loss caused by the third radiator 250 and the conductor and dielectric disposed around the third radiator 250. In one embodiment, the current distribution of the third radiator 250 is relatively more even, which may increase the radiation aperture of the third radiator 250, thereby improving the system efficiency and radiation efficiency of the antenna.

[0459] In one embodiment, the third radiator 250 may further be provided with at least one fourth slot. In one embodiment, the first element 252 may be electrically connected between the conductors on both sides of each fourth slot.

[0460] like Fig.52 As shown, compared to Fig.51 In the antenna 200 shown, at least one second element 253 may be electrically connected between the second radiator 240 and the floor. The second element 253 may disperse the intensity of a single current strong point on the second radiator 240, so that the current is more evenly distributed. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which may reduce the loss caused by the second radiator 240 and the conductor and dielectric disposed around the second radiator 240. In one embodiment, the current distribution of the second radiator 240 is relatively more even, which may increase the radiation aperture of the third radiator 250, thereby improving the system efficiency and radiation efficiency of the antenna.

[0461] In one embodiment, at least one fourth slot may be further provided in the second radiator 240. In one embodiment, the first element 252 may be electrically connected between the conductors on both sides of each fourth slot.

[0462] Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0463] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0464] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0465] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A foldable electronic device, characterized in that: include: A first shell, a second shell and a floor, wherein The first shell includes a first frame, the second shell includes a second frame, the first frame is at least partially spaced from the floor, and the second frame is at least partially spaced from the floor; The first frame includes a first position and a second position, the first frame is coupled with the floor or provided with a first gap at the first position, and the first frame is coupled with the floor or provided with a second gap at the second position; The second frame includes a third position and a fourth position, the second frame is coupled to the floor at the third position, and the second frame is provided with a third gap at the fourth position; a first rotating shaft, the first rotating shaft being located between the first shell and the second shell, and the first rotating shaft being rotatably connected to the first shell and the second shell respectively; and An antenna, comprising: a first radiator and a first feeding circuit, wherein the first radiator is a conductive portion of the first frame between the first position and the second position, the first radiator comprises a first feeding point, and the first feeding circuit is coupled to the first feeding point; and a second radiator and a first element, wherein the second radiator is a conductive portion of the second frame between the third position and the fourth position, and the length of the second radiator is less than or equal to three times the length of the first radiator; wherein the second radiator comprises a first coupling point and a second coupling point, the second radiator is provided with a fourth gap between the first coupling point and the second coupling point, the first end of the first element is coupled to the first coupling point, and the second end of the first element is coupled to the second coupling point; Among them, based on the fact that the foldable electronic device is in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator and the first element are used to generate a first parasitic resonance, and the first direction is the thickness direction of the foldable electronic device.

2. The foldable electronic device according to claim 1, characterized in that: A length of the second radiator between the third position and the fourth slot is smaller than a length of the second radiator between the third slot and the fourth slot.

3. The foldable electronic device according to claim 1 or 2, characterized in that: The equivalent capacitance value of the first element is less than or equal to a first threshold; When the resonance point frequency of the first parasitic resonance is less than or equal to 1 GHz, the first threshold is 10 pF; When the resonance point frequency of the first parasitic resonance is greater than 1 GHz, the first threshold is 2 pF.

4. The foldable electronic device according to any one of claims 1 to 3, characterized in that: The antenna further includes a second element; the second radiator includes the third coupling point, the first end of the second element is coupled to the third coupling point, and the second end of the second element is coupled to the floor; The second radiator, the first element, and the second element are used to generate the first parasitic resonance.

5. The foldable electronic device according to claim 4, characterized in that: The equivalent inductance of the second element is less than or equal to 10 nH.

6. The foldable electronic device according to claim 4 or 5, characterized in that: The first coupling point is located between the third position and the fourth gap, and the second coupling point is located between the fourth position and the fourth gap; The third coupling point is located between the third position and the first coupling point, and the distance between the first coupling point and the third coupling point is greater than or equal to 0 mm and less than or equal to 5 mm; or, The third coupling point is located between the fourth position and the second coupling point, and a distance between the second coupling point and the third coupling point is greater than or equal to 0 mm and less than or equal to 5 mm.

7. The foldable electronic device according to any one of claims 1 to 6, characterized in that: The width of the fourth gap is greater than or equal to 0.1 mm and less than or equal to 2 mm.

8. The foldable electronic device according to any one of claims 1 to 7, characterized in that: The distance between the first coupling point and the fourth gap is less than or equal to 5 mm, and / or the distance between the second coupling point and the fourth gap is less than or equal to 5 mm.

9. The foldable electronic device according to any one of claims 1 to 8, characterized in that: The electrical length of the second radiator is greater than three eighths of a first wavelength, and the first wavelength is a wavelength corresponding to the first parasitic resonance.

10. The foldable electronic device according to any one of claims 1 to 9, characterized in that: When the resonance point frequency of the first resonance is less than or equal to 1.5 GHz, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz, When the resonance point frequency of the first resonance is less than or equal to 3 GHz and greater than 1.5 GHz, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 400 MHz, When the frequency of the resonance point of the first resonance is less than or equal to 6 GHz and greater than 3 GHz, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 600 MHz.

11. The foldable electronic device according to any one of claims 1 to 10, characterized in that: The length of the second radiator is greater than or equal to 0.8 times the length of the first radiator.

12. The foldable electronic device according to any one of claims 1 to 11, characterized in that: The first frame is coupled to the floor at the first position, and the first frame is provided with the second gap at the second position.

13. The foldable electronic device according to claim 12, characterized in that: The length of the second radiator is greater than or equal to 1.5 times the length of the first radiator and less than or equal to 2.5 times the length of the first radiator.

14. The foldable electronic device according to claim 12, characterized in that: The first frame includes a fifth position and a sixth position, the second position is located between the fifth position and the first position, the fifth position is located between the second position and the sixth position, the first frame is coupled to the floor at the fifth position, and the first frame is provided with a fifth gap at the sixth position; The antenna includes a third radiator and a second feeding circuit, the third radiator is a conductive portion of the first frame between the fifth position and the sixth position, the third radiator includes the second feeding point, and the second feeding circuit is coupled to the second feeding point.

15. The foldable electronic device according to claim 12, characterized in that: The first frame includes a fifth position and a sixth position, the second position is located between the fifth position and the first position, the fifth position is located between the second position and the sixth position, the first frame is coupled to the floor at the fifth position, and the first frame is provided with a fifth gap at the sixth position; The antenna includes a third radiator and a second feeding circuit, the third radiator is a conductive portion of the first frame between the second position and the sixth position, the third radiator includes the second feeding point, and the second feeding circuit is coupled to the second feeding point.

16. The foldable electronic device according to claim 15, characterized in that: The antenna includes a third element; The third radiator also includes a fourth coupling point, the second feeding point is located between the fifth position and the sixth position, the fourth coupling point is located between the second position and the fifth position, the first end of the third element is coupled to the fourth coupling point, and the second end of the third element is coupled to the floor.

17. The foldable electronic device according to any one of claims 1 to 16, characterized in that: The foldable electronic device further comprises a third housing, the third housing comprises a third frame, and the third frame is at least partially spaced apart from the floor, wherein: The third frame includes a fifth position and a sixth position, the third frame is coupled to the floor or provided with a fifth gap at the fifth position, and the third frame is coupled to the floor or provided with a sixth gap at the sixth position; The foldable electronic device further includes a second rotating shaft, the second rotating shaft is located between the first shell and the third shell, and the second rotating shaft is rotatably connected to the first shell and the third shell respectively; The antenna comprises a third radiator and a second feeding circuit, the third radiator is a conductive portion of the first frame between the fifth position and the sixth position, the third radiator comprises the second feeding point, and the second feeding circuit is coupled and connected to the second feeding point; Based on the foldable electronic device being in a folded state, the third radiator and the second radiator at least partially overlap along a first direction.

18. The foldable electronic device according to claim 17, characterized in that: The first frame is provided with the first slit at the first position, and the first frame is provided with the second slit at the second position; The third frame is coupled to the floor at the fifth position, and the third frame is provided with a sixth gap at the sixth position; The first frame further includes a first grounding point, the first grounding point is located between the first position and the second position, and the first frame is coupled to the floor at the first grounding point.

19. The foldable electronic device according to claim 18, characterized in that: The antenna includes a third element; The first radiator also includes a fourth coupling point, the first feeding point is located between the first grounding point and the second position, the fourth coupling point is located between the first position and the first grounding point, the first end of the third element is coupled to the fourth coupling point, and the second end of the third element is coupled to the floor.

20. The foldable electronic device according to claim 17, characterized in that: The first frame is provided with the first slit at the first position, and the first frame is provided with the second slit at the second position; The third frame is provided with a fifth slit at the fifth position, and the third frame is provided with a sixth slit at the sixth position; The first frame further includes a first grounding point, the first grounding point is located between the first position and the second position, and the first frame is coupled to the floor at the first grounding point; The third frame further includes a second grounding point, which is located between the fifth position and the sixth position, and the third frame is coupled to the floor at the grounding point.

21. The foldable electronic device according to claim 20, characterized in that: The antenna includes a first tuning device and a second tuning device; The third radiator further includes a fourth coupling point and a fifth coupling point, the fourth coupling point is located between the fifth position and the sixth position, and the fifth coupling point is located between the second position and the fifth position; The first end of the first tuning device is coupled to the fourth coupling point, the second end of the first tuning device is coupled to the floor, the first end of the second tuning device is coupled to the fifth coupling point, and the second end of the second tuning device is coupled to the floor.

22. The foldable electronic device according to any one of claims 17 to 21, characterized in that: Based on the foldable electronic device being in a folded state, the first radiator and the third radiator at least partially overlap along the first direction.

23. The foldable electronic device according to any one of claims 17 to 21, characterized in that: Based on the fact that the foldable electronic device is in a folded state, the first radiator and the third radiator do not overlap at all along the first direction.

24. The foldable electronic device according to any one of claims 14 to 23, characterized in that: The third radiator is used to generate a second resonance, and a frequency difference between a resonance point of the first parasitic resonance and a resonance point of the second resonance is less than or equal to 200 MHz.

25. The foldable electronic device according to any one of claims 14 to 24, characterized in that: The third radiator is used to generate a second resonance, and a resonance frequency band of the first resonance is the same frequency or adjacent to a resonance frequency band of the second resonance.

26. The foldable electronic device according to any one of claims 1 to 12, characterized in that: The second frame includes a fifth position and a sixth position, the fourth position is located between the fifth position and the third position, the fifth position is located between the fourth position and the sixth position, the second frame is coupled to the floor at the fifth position, and the second frame is provided with a sixth gap at the sixth position; The antenna includes a third radiator and a fourth element, the third radiator is the conductive part of the second frame between the fifth position and the sixth position, the third radiator and the first radiator do not overlap along the first direction, the second radiator includes a seventh coupling point, the third radiator includes an eighth coupling point, the first end of the fourth element is coupled to the seventh coupling point, and the second end of the fourth element is coupled to the eighth coupling point.

27. The foldable electronic device according to any one of claims 1 to 26, characterized in that: The antenna includes a fourth element; The first radiator also includes a fifth coupling point and a sixth coupling point, the first radiator is provided with a sixth gap between the fifth coupling point and the sixth coupling point, the first end of the fourth element is coupled to the fifth coupling point, and the second end of the fourth element is coupled to the sixth coupling point.

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