A foldable electronic device

Abstract

Embodiments of the present application provide a foldable electronic device, including an antenna. The antenna utilizes the first frame and the second frame provided in the foldable electronic device as radiators. A partial frame of the first frame serves as a feeding stub, and a partial frame of the second frame serves as a parasitic stub. By providing a slit in the parasitic stub, the radiation aperture of the parasitic stub is increased to improve the radiation characteristics of the antenna, so that the electronic device has better communication performance.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and particularly to a foldable electronic device. Background Art

[0002] With the rapid development of wireless communication technology, the past second-generation (2G) mobile communication systems mainly supported call functions. Electronic devices were only tools for people to send and receive text messages and communicate by voice. The wireless Internet function used the voice channel to transmit data, and the speed was extremely slow. Nowadays, in addition to making calls, sending text messages, and taking pictures, electronic devices can also be used for online music listening, watching online videos, real-time video, etc., covering various applications such as calls, film and television entertainment, and e-commerce in people's lives. Among these, multiple functional applications require wireless networks to upload and download data. Therefore, the high-speed transmission of data has become extremely important.

[0003] With the increasing demand for high-speed data transmission by people, the development trend of the industrial design (ID) of electronic devices is a large screen ratio and multiple cameras. This has caused a significant reduction in the antenna clearance, and the layout space is becoming more and more limited. However, this conflicts with the nature of the antenna itself as an open system, restricting the performance of the antenna. Summary of the Invention

[0004] An embodiment of this application provides a foldable electronic device, including an antenna. The antenna uses the first and second frames of the foldable electronic device as radiators. Part of the first frame is used as a radiation stub (the stub where the feeding point feeds in the signal), and part of the second frame is used as a parasitic stub (the stub that couples the signal by coupling the main radiation stub). By providing a slit in the parasitic stub, 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, including: a first housing, a second housing, and a floor. Wherein, the first housing includes a first frame, the second housing includes a second frame, at least part of the first frame is spaced apart from the floor, and at least part of the second frame is spaced apart from the floor; the first frame includes a first position and a second position, the first frame is coupled to the floor or has a first gap at the first position, and the first frame is coupled to the floor or has 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 has a third gap at the fourth position; a first rotating shaft, the first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is respectively rotatably connected to the first housing and the second housing; and an antenna, the antenna includes: 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 includes a first feeding point, and 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 has 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 in 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 embodiments of the present application, a fourth gap is provided between the first coupling point and the second coupling point, and a first element is coupled (the first element can be used to determine the equivalent capacitance value of the fourth gap), 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, the current is more evenly distributed, and the conductor loss and dielectric loss brought by the second radiator and the conductors and dielectrics arranged around 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 further includes a second element; the second radiator includes the third coupling point, a first end of the second element is coupled to the third coupling point, and a second end of the second element is coupled to the ground plane; the second radiator, the first element, and the second element are configured to generate the first parasitic resonance.

[0008] According to the embodiments of the present application, in the technical solution provided by the embodiments of the present application, the second radiator is coupled to the ground plane 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, the current is more evenly distributed, and the conductor loss and dielectric loss caused by the second radiator and the conductors and dielectrics 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, the length of the second radiator between the third position and the fourth slot is less than the length of the second radiator between the third slot and the fourth slot.

[0010] According to the embodiments of the present application, since the second frame is coupled to the ground plane at the third position, the current of the second radiator is stronger near the third position and weaker near the fourth position. When the fourth slot is provided in the region with stronger current, the effect of reducing the intensity of a single current strong 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 second radiator and the conductors and dielectrics 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 more obviously increased, 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, the 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 slot, and the second coupling point is located between the fourth position and the fourth slot; 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 the embodiments 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 ends of the first element and the second element can be coupled to the first coupling point (third coupling point) through the same connecting member.

[0014] The third coupling point can be located between the third position and the first coupling point. The second element can be an inductor, which can 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 relationship between the first element and the second element is similar to a series relationship.

[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. By the first element and the second element, the radiation aperture of the second radiator is adjusted simultaneously 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 connecting member.

[0017] The third coupling point can be located between the fourth position and the second coupling point. The second element can be a capacitor, which can increase 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 relationship between the first element and the second element is similar to a parallel relationship. In one embodiment, when the equivalent capacitance value of the first element is 2 pF, the loss is relatively high. However, the second element 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 is 1 pF, the equivalent capacitance value of the second element is 1 pF, and the equivalent capacitance value between the first coupling point and the third coupling point is 2 pF), 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 can be an inductor, which can be used to reduce the radiation aperture of the second radiator. By the first element and the second element, the radiation aperture of the second radiator is adjusted simultaneously to achieve parasitic resonance in the desired frequency band.

[0019] Combined with the first aspect, in some implementation manners of the first aspect, the width of the fourth slit 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 some implementations of the first aspect, the distance between the first coupling point and the fourth slot is less than or equal to 5 mm, and / or the distance between the second coupling point and the fourth slot is less than or equal to 5 mm.

[0021] 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 a second slot at the second position; wherein, based on the foldable electronic device being in a folded state, the second slot is aligned with the third slot or the fourth slot in the first direction.

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

[0024] According to the embodiments 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 can correspond to a quarter-wavelength mode. Through the second element and the fourth slot, the electrical length of the second radiator can be made greater than three-eighths of the first wavelength, the current on the second radiator is in the same direction (no reverse occurs), and the electric field between the second radiator and the floor does not reverse. The electrical length of the second radiator increases from a quarter wavelength of the first wavelength to more than three-eighths of the first wavelength, but still operates in the 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 losses caused by the radiator and the conductors and dielectrics arranged around the radiator, and further improving the radiation characteristics of the antenna.

[0025] 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 0.8 times the 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, 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.

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

[0029] According to the embodiments 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. Among them, 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 some 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 ground plane at the first position and the fifth position, and the second slot and the fifth slot are respectively provided at the second position and the sixth position of the first frame; the antenna includes a third radiator and a second feeding circuit, the third radiator is the 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 some 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 ground plane at the first position and the fifth position, and the second slot and the fifth slot are respectively provided at the second position and the sixth position of the first frame; the antenna includes a third radiator and a second feeding circuit, the third radiator is the 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 may form a first antenna unit. The third radiator and the second feeding circuit may form a second antenna unit. The second radiator may simultaneously serve as a parasitic stub of the first antenna unit and the second antenna unit, for improving the radiation characteristics of the first antenna unit and the second antenna unit. Moreover, since the first antenna unit and the second antenna unit can share the second radiator, miniaturization of the overall structure of the antenna can be achieved while improving the radiation characteristics of the first antenna unit and the second antenna unit at the same time.

[0033] In combination with the first aspect, in some implementation manners of the first aspect, the antenna includes a third element; the third radiator further 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, a first end of the third element is coupled to the fourth coupling point, and a second end of the third element is coupled to the ground plane.

[0034] In combination with the first aspect, in some implementation manners of the first aspect, the foldable electronic device further includes a third housing, the third housing includes a third frame, at least a part of the third frame is spaced apart from the ground plane, wherein the third frame includes a fifth position and a sixth position, the third frame is coupled to the ground plane or provided with a fifth gap at the fifth position, and the third frame is coupled to the ground plane 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 housing and the third housing, and the second rotating shaft is respectively rotatably connected to the first housing and the third housing; 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 in a first direction.

[0035] In combination with the first aspect, in some implementation manners 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 ground plane 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 ground plane 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 further 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 ground plane.

[0037] In combination with the first aspect, in certain implementations of the first aspect, the first frame has a first slot at the first position and a second slot at the second position; the third frame has a fifth slot at the fifth position and a sixth slot at the sixth position; the first frame further includes a first grounding point located between the first position and the second position, and the first frame is coupled to the ground plane at the first grounding point; the third frame further includes a second grounding point located between the fifth position and the sixth position, and the third frame is coupled to the ground plane at the grounding point.

[0038] In combination with the first aspect, in certain implementations of the first aspect, 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 ground plane, 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 ground plane.

[0039] In combination with the first aspect, in certain 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 certain implementations of the first aspect, based on the foldable electronic device being in a folded state, the first radiator and the third radiator do not overlap at all along the first direction.

[0041] In combination with the first aspect, in certain implementations of the first aspect, the third radiator is used to generate a second resonance, 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.

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

[0043] In combination with the first aspect, in certain implementations of the first aspect, the foldable electronic device further includes a third housing, the third housing includes a third frame, and at least a part of the third frame is 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 slit at the sixth position; the foldable electronic device further includes a second rotating shaft, the second rotating shaft is located between the second housing and the third housing, and the second rotating shaft is respectively rotatably connected to the first housing and the third housing; 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 a first direction.

[0044] According to an embodiment of the present application, the second radiator and the third radiator as parasitic stubs are respectively located on different housings, and at least partially overlap with the first radiator as the main radiation stub in a first direction, and generate resonance through an indirect coupling method.

[0045] In combination with the first aspect, in certain implementations of the first aspect, the antenna includes a fourth element; the third radiator further includes a fifth coupling point and a sixth coupling point, the third radiator is provided with a sixth slit between the fifth coupling point and the sixth coupling point, a first end of the fourth element is coupled to the fifth coupling point, and a 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 slit 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 a first direction, the second radiator includes a seventh coupling point, the third radiator includes an eighth coupling point, a first end of the fourth element is coupled and connected to the seventh coupling point, and a second end of the fourth element is coupled and connected 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. The second radiator generates resonance through an indirect coupling method. The third radiator is coupled to the seventh coupling point of the second radiator through the eighth coupling point, and through the indirect coupling with the second radiator, so as to generate resonance.

[0048] In a second aspect, a foldable electronic device is provided, comprising: a first housing, a second housing, and a floor, wherein the first housing includes a first frame, the second housing includes a second frame, at least a part of the first frame is spaced apart from the floor, and at least a part of the second frame is spaced apart from the floor; the first frame includes a first position and a second position, the first frame is coupled to the floor or has a first gap at the first position, and the first frame is coupled to the floor or has a second gap at the second position; the second frame includes 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 has a third gap at the fifth position; a first rotating shaft, the first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is respectively rotatably connected to the first housing and the second housing; and an antenna, the antenna includes: 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 includes a first feeding point, and the first feeding circuit is coupled to the first feeding point, a second radiator, a first element, and a second 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, as well as 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 has a fourth gap between the first coupling point and the second coupling point, the second radiator has a fifth gap between the third coupling point and the fourth coupling point, a first end of the first element is coupled to the first coupling point, a second end of the first element is coupled to the second coupling point, a first end of the second element is coupled to the third coupling point, and a 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 in a first direction, the first radiator is used to generate a first resonance, the second radiator, the first element, and the second element are used to generate a first parasitic resonance, and the frequency difference between the resonance points of the first parasitic resonance and 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] In a third aspect, a foldable electronic device is provided, including: a first housing, a second housing, and a floor. Among them, the first housing includes a first frame, the second housing includes a second frame, at least a part of the first frame is spaced apart from the floor, and at least a part of the second frame is spaced apart from the floor; the first frame includes a first position and a second position, the first frame is coupled to the floor or has a first gap at the first position, and the first frame is coupled to the floor or has a second gap at the second position; the second frame includes 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 has a third gap and a fourth gap at the third position and the fourth position respectively, 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 housing and the second housing, and the first rotating shaft is respectively rotatably connected to the first housing and the second housing; and an antenna, the antenna includes: a first radiator and a first feeding circuit, the first radiator is the conductive part of the first frame between the first position and the second position, the first radiator includes a first feeding point, and the first feeding circuit is coupled to the first feeding point, a second radiator, a first element, and a second element, the second radiator is the conductive part of the second frame between the third position and the fourth position, 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 has a fifth gap between the first coupling point and the second coupling point, the second radiator has a sixth gap between the third coupling point and the fourth coupling point, the first end of the first element is coupled to the first coupling point, 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 in a first direction, the first radiator is used to generate a first resonance, the second radiator, the first element, and the second element are used to generate a first parasitic resonance, and the frequency difference between the resonance points of the first parasitic resonance and the first resonance is less than or equal to 200 MHz, and the first direction is the thickness direction of the foldable electronic device. Description of the Drawings

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

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

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

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

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

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

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

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

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

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

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

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

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

[0063] Figure 14 Is Figure 11 And Figure 13 The S-parameter simulation result diagram of the antenna shown.

[0064] Figure 15 Is Figure 11 And Figure 13Simulation results of the radiation efficiency and system efficiency of the antenna shown.

[0065] Figure 16 FIG. 4 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0066] Figure 17 FIG. 4 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0067] Figure 18 is Figure 17 FIG. 5 is a simulation result diagram of the S-parameters of the antenna shown.

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

[0069] Figure 20 is Figure 17 Simulation results of the radiation efficiency and system efficiency of the second antenna unit in the antenna shown.

[0070] Figure 21 FIG. 6 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0071] Figure 22 is Figure 21 FIG. 7 is a simulation result diagram of the S-parameters of the antenna shown.

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

[0073] Figure 24 is Figure 21 Simulation results of the radiation efficiency and system efficiency of the second antenna unit in the antenna shown.

[0074] Figure 25 FIG. 8 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0075] Figure 26 FIG. 9 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0076] Figure 27 is Figure 25 FIG. 10 is a simulation result diagram of the S-parameters of the antenna shown.

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

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

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

[0080] Figure 31 It is Figure 30 S-parameter simulation result diagram of the antenna shown.

[0081] Figure 32 It is Figure 30 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown.

[0082] Figure 33 It is Figure 30 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

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

[0084] Figure 35 It is Figure 34 S-parameter simulation result diagram of the antenna shown.

[0085] Figure 36 It is Figure 34 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown.

[0086] Figure 37 It is Figure 34 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

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

[0088] Figure 39 It is Figure 38 S-parameter simulation result diagram of the antenna shown.

[0089] Figure 40 It is Figure 38 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown.

[0090] Figure 41 It is Figure 38 Simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

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

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

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

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

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

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

[0097] Figure 48 is Figure 47 The S-parameter simulation result diagram of the antenna shown.

[0098] Figure 49 is Figure 47 The simulation results of the radiation efficiency and system efficiency of the antenna shown.

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

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

[0101] Figure 52 It is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application. Detailed implementation manners

[0102] Hereinafter, the terms that may appear in the embodiments of the present application will be explained.

[0103] It should be understood that the term "and / or" used herein is only a same field for describing associated objects, indicating that three relationships may exist. For example, A and / or B may indicate: A exists alone, A and B exist simultaneously, 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] For the range used in this application, unless otherwise specified as not including the end values, it is default to include the two end values of the range. For example, in the range from 1 to 5, the two values 1 and 5 are included.

[0105] Coupling: It 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 physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines such as copper foils or wires on a printed circuit board (PCB) that can transmit electrical signals. "Indirect coupling" can be understood as electrical conduction between two conductors in a non-contact manner through air separation. In one embodiment, indirect coupling can also be called capacitive coupling. For example, signal transmission is achieved by forming an equivalent capacitance through the coupling between the gaps separating two conductive parts.

[0106] Element / device: Includes at least one of lumped elements / devices and distributed elements / devices.

[0107] Lumped element / device: It refers to the general term for all elements when the size of the element is much smaller than the wavelength corresponding to the operating frequency of the circuit. For a signal, at any moment, the characteristics of the element always remain fixed and are independent of frequency. Lumped elements / devices can include lumped capacitors, lumped inductors, etc.

[0108] Distributed element / device: Different from lumped elements, when a signal passes through an element, the characteristics of each point of the element itself will vary with the change of the signal. At this time, the element as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed element. Distributed elements / devices can include distributed capacitors, distributed inductors, etc.

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

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

[0111] Radiator: It is a device in an antenna used to receive / transmit electromagnetic wave radiation. In some cases, "antenna" is narrowly understood as a radiator, which converts the guided wave energy from a transmitter into radio waves, or converts radio waves into guided wave energy, for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator through a feeder line. Through the radiator, it is converted into electromagnetic wave energy of a certain polarization and radiated in the required direction. The receiving radiator converts the electromagnetic wave energy of a certain polarization from a specific direction in space back into modulated high-frequency current energy and transports it to the input end of the receiver through a feeder line.

[0112] The radiator may include a conductor with a specific shape and size, such as linear or sheet-like, etc. The present application does not limit the specific shape. In one embodiment, the linear radiator may be simply referred to as a wire 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 support conductor and may also be referred to as a support antenna. In one embodiment, the wire diameter (e.g., including thickness and width) of the linear radiator, or the radiator of the wire antenna, is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length can be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of wire antennas include dipole antennas, half-wave dipole antennas, monopole antennas, loop antennas, inverted-F antennas (also known as IFA, Inverted F Antenna). For example, for a dipole antenna, each dipole antenna usually includes two radiating branches, and each branch is fed by a feeding part from the feeding end of the radiating branch. For example, an inverted-F antenna (Inverted-F Antenna, IFA) can be regarded as obtained by adding a grounding path to a monopole antenna. The IFA antenna has a feeding point and a grounding point, and is called an inverted-F antenna because its side view is in the shape of an inverted F. 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 F Antenna). 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 silver paste, etc. The shape of the sheet radiator includes circular, rectangular, annular, etc. The present application does not limit the specific shape. The structure of a microstrip antenna generally consists of a dielectric substrate, a radiator, and a ground plane, where the dielectric substrate is disposed between the radiator and the ground plane.

[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] Terminal / Point: The "terminal / point" among the first terminal / second terminal / feeding terminal / grounding terminal / feeding point / grounding point / coupling point of the antenna radiator should not be narrowly understood as necessarily being an end point or end part physically disconnected from other radiators. It can also be considered as a certain point or a certain section on a continuous radiator. In one embodiment, the "terminal / point" can include the connection / coupling area on the antenna radiator for coupling and connecting other conductive structures. For example, the feeding terminal / feeding point can be the coupling area on the antenna radiator for coupling and connecting a feeding structure or a feeding circuit (for example, the area facing a part of the feeding circuit), and for another example, the grounding terminal / grounding point can be the connection / coupling area on the antenna radiator for coupling and connecting a grounding structure or a grounding circuit.

[0116] Open End, Closed End: In some embodiments, the open end and the closed end are, for example, defined 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, defined relative to other conductive bodies. The closed end is electrically connected to other conductive bodies, and the open end is not electrically connected to other conductive bodies. In one embodiment, the open end can also be called a floating end, a free end, an open end, or an open-circuit end. In one embodiment, the closed end can also be called a grounding end or a short-circuit end. It should be understood that in some embodiments, other conductive bodies can be coupled and connected through the open end to transfer coupled energy (which can be understood as transferring current).

[0117] In some embodiments, the understanding of the "closed end" can also be from the perspective of current distribution. The closed end or the grounding end, etc., can be understood as the current large point on the radiator, or can also be understood as the electric field small point on the radiator. In one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the closed end can not change the current distribution characteristics of its current large point / electric field small point. In one embodiment, opening a slit (such as a slit filled with an insulating material) at or near the closed end can not change the current distribution characteristics of its current large point / electric field small point.

[0118] In some embodiments, the understanding of the "open end" can also be from the perspective of current distribution. The open end or the floating end, etc., can be understood as the current small point on the radiator, or can also be understood as the electric field large point on the radiator. In one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the open end can not change the current distribution characteristics of its current small point / electric field large point.

[0119] It should be understood that coupling electronic devices (such as capacitors, inductors, etc.) to the radiator end at a slit (from the perspective of the radiator structure, similar to the opening of an open end or a floating end) can make this radiator end a current large point / electric field small point. In this case, it should be understood that the radiator end at this slit is actually a closed end or a grounding end, etc.

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

[0121] Resonant Band / Communication Band / Operating Band: No matter what type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting Band B40 has an operating band including frequencies in the range of 2300 MHz to 2400 MHz, or in other words, the operating band of this antenna includes Band B40. The frequency range that meets the index requirements can be regarded as the operating band of the antenna.

[0122] Electrical Length: It can refer to the ratio of the physical length (i.e., the 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 the operating wavelength, which can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating band supported by the antenna. For example, assuming the center frequency of the B1 uplink band (resonant frequency from 1920 MHz to 1980 MHz) is 1955 MHz, then the operating wavelength can be the wavelength calculated using the frequency of 1955 MHz. Not limited to the center frequency, the "operating wavelength" can also refer to the wavelength corresponding to a non - center frequency of the resonant frequency or operating band.

[0126] It should be understood that the wavelength of the radiated signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiated signal (MHz), and the speed of light can be taken as 3×10^8 m / s. The wavelength of the radiated signal in a medium can be calculated as follows: Among them, ε is the relative permittivity of the medium. The wavelength in the embodiments of the present application generally refers to the medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency, or the medium wavelength corresponding to 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 from 1920 MHz to 1980 MHz) is 1955 MHz, the wavelength can be the medium wavelength calculated using this frequency of 1955 MHz. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to a non-center frequency of the resonant frequency or the operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of the present application can be simply calculated by the relative permittivity of the medium filled on one side or multiple sides of the radiator.

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

[0128] Antenna radiation efficiency: It refers to the ratio of the power radiated by the antenna into space (i.e., the power effectively converted into electromagnetic waves) 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, 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, and both metal loss and dielectric loss are factors affecting 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 with dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is characterized.

[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 transmitted 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 smaller the radiation efficiency of the antenna.

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

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

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

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

[0135] There is at least partial frequency overlap between the resonance frequency bands of the first resonance and the second resonance. For example, the resonance frequency band of the first resonance includes B35 (1.85 - 1.91 GHz) in LTE, and the resonance frequency band of the second resonance includes B39 (1.88 - 1.92 GHz) in LTE. Since the frequencies of the resonance frequency band of the first resonance and the resonance 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 in the embodiments of the present application, the working frequency bands of the first resonance and the second resonance being adjacent can be understood as:

[0137] Among the resonance frequency bands of the first resonance and 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 central frequency of the higher frequency band. For example, the resonance frequency band of the first resonance includes B3 (1.71 - 1.785 GHz) in LTE, and the resonance frequency band of the second resonance includes L1 (1578.42 ± 1.023 MHz) in GPS. Since B3 (1.71 - 1.785 GHz) and L1 (1578.42 ± 1.023 MHz) are adjacent frequency bands, it can be considered that the resonance frequency bands of the first resonance and the second resonance are adjacent. Or for example, the resonance frequency band of the first resonance includes B40 (2.3 - 2.4 GHz) in LTE, and the resonance frequency band of the second resonance includes the BT frequency band (2.4 - 2.485 GHz). Since B40 (2.3 - 2.4 GHz) and the BT frequency band (2.4 - 2.485 GHz) are adjacent frequency bands, it can be considered that the resonance frequency bands of the first resonance and the second resonance are adjacent.

[0138] Ground (Floor) (ground, GND): It can generally refer to at least a part of any ground layer, ground plane, or ground metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of the above-mentioned ground layer, ground plane, or ground component, etc. "Ground" can be used for grounding components in an electronic device. In one embodiment, "ground" can be the ground layer of the circuit board of the electronic device, or the ground plane formed by the middle frame of the electronic device, or the ground metal layer formed by the metal film under the 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 with 8, 10, 12, 13, or 14 layers of conductive material, or components separated and electrically insulated by dielectric layers or insulating layers such as fiberglass, polymers, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a trace layer, and the trace layer and the ground layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on the circuit board or connected to the circuit board; or electrically connected to the trace layer and / or the ground layer in the circuit board. For example, a radio frequency source is disposed on the trace layer.

[0139] Any of the above-mentioned ground layer, ground plane, or ground metal layer is made of a conductive material. In one embodiment, the conductive material can be any one 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 on an insulating substrate, and tin-plated copper, cloth impregnated with graphite powder, a substrate coated with graphite, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art can understand that the ground layer / ground plane / ground metal layer can also be made of other conductive materials.

[0140] Grounding: It means achieving coupling with the above-mentioned ground / floor in any way. In one embodiment, grounding can be through physical grounding, for example, achieving physical grounding at a specific position on the frame through a partial structural member of the middle frame (or called, physical ground). In one embodiment, grounding can be through device grounding, for example, grounding through devices such as capacitors / inductors / resistors connected in series or in parallel (or called, device ground).

[0141] Next, the technical solutions of the embodiments of the present application will be described in conjunction with the accompanying drawings.

[0142] Figure 1FIG. 0 is a schematic structural diagram of a foldable electronic device 100 provided by an embodiment of the present application. The foldable electronic device 100 may be an electronic device with a folding function such as a mobile phone, a tablet computer, an e-reader, a laptop computer, a wearable device such as a watch, etc. Figure 1 The illustrated embodiment will be described by taking a foldable mobile phone as an example.

[0143] Referring 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 rotating shaft 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 housing 126 and a second housing 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 therein may schematically represent the flexible display screen 110. The flexible display screen 110 may 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 may be, for example, a liquid crystal flexible 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. Any one of them may be used, and the embodiments of the present application do not make any limitation thereto.

[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 rotating shaft 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 can surround the outer periphery of the first cover body 122, and at least part of the first frame 121 can also surround the outer periphery of the first display part 111. The first display part 111 can be arranged in parallel and spaced apart from the first cover body 122, and the first display part 111 and the first cover body 122 can be located on both sides of the first frame 121. The spaced space between the first display part 111 and the first cover body 122 can be used to arrange components of the foldable electronic device 100, such as antennas, circuit board assemblies, etc.

[0147] The second frame 123 can surround the outer periphery of the second cover body 124, and at least part of the second frame 123 can also surround the outer periphery of the second display part 112. The second display part 112 can be arranged in parallel and spaced apart from the second cover body 124, and the second display part 112 and the second cover body 124 can be located on both sides of the second frame 123. The spaced space between the second display part 112 and the second cover body 124 can be used to arrange components of the foldable electronic device 100, such as antennas, circuit board assemblies, etc.

[0148] In an embodiment provided by the present application, the cover body and the frame can be two parts of the housing of the foldable electronic device 100. The cover body and the frame can be connected, and the form of this connection may not belong to assembly methods such as snap connection, adhesion, welding, riveting, clearance fit, etc. The connection relationship between the cover body and the frame is usually difficult to be separated. In another embodiment provided by the present application, the cover body and the frame can be two different components. By assembling the cover body and the frame together, the housing 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. For this part of the frame serving as a radiator, there can be a gap between it and other parts of the cover body, so as to ensure that the antenna radiator has a good radiation environment. In one embodiment, a slit can be provided at this part of the frame where the cover body serves as a radiator to facilitate the radiation of the antenna.

[0150] The antenna of the electronic device 100 can also be arranged inside the frame. When the frame of the electronic device 100 is made of non-conductive material, the antenna radiator can be located inside the electronic device 100 and extend along the frame. For example, the antenna radiator is arranged close to the frame to minimize the volume occupied by the antenna radiator and be closer to the outside of the electronic device 100 to achieve a better signal transmission effect. It should be noted that the antenna radiator being arranged close to the frame means that the antenna radiator can be arranged closely against the frame or 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 can also be arranged inside the housing, such as a bracket antenna, a millimeter wave antenna, etc. Figure 1(not shown in the figure). The clearance of the antenna disposed within the housing can be obtained by a slit / aperture on any one of the cover body, and / or the frame, and / or the display screen, or by a non-conductive gap / aperture formed between any several of them. The setting of the clearance 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 within the electronic device 100, and the antenna radiates signals to the external space through this non-conductive area. In one embodiment, the form of the antenna can be an antenna form based on a flexible printed circuit (FPC), an antenna form based on laser-direct-structuring (LDS), or a microstrip disk antenna (MDA), etc. In one embodiment, the antenna can also adopt a transparent structure embedded within the display screen of the electronic device 100, such that the antenna is a transparent antenna unit embedded within the display screen of the electronic device 100.

[0152] The foldable electronic device 100 may further include a printed circuit board PCB (not shown in the figure). The PCB is disposed within the cavity formed by the cover body. Among them, the PCB can adopt a flame-retardant material (FR-4) dielectric board, or a Rogers dielectric board, or a hybrid 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, for example, radio frequency chips, etc. In one embodiment, a metal layer can be provided on the printed circuit board PCB. This 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. This metal layer can be called a floor, or a ground plane, or a ground layer. In one embodiment, this metal layer can be formed by etching metal on the surface of any layer of the dielectric board within the PCB. In one embodiment, the metal layer for grounding can be provided on the side of the printed circuit board PCB close to the flexible display screen 110. In one embodiment, the edge of the PCB can be regarded as the edge of its ground layer. The electronic device 100 may also have other floors / ground planes / ground layers, as described above, which will not be elaborated 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 approach or move away from each other. Correspondingly, the first display portion 111 and the second display portion 112 of the flexible display screen 110 can approach or move away from each other, such 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 connection component, and a second connection component. The first connection component may be fixed to the first cover 122, and the second connection component may be fixed to the second cover 124. The first connection component and the second connection component may rotate relative to the main shaft. Through the relative movement of the first connection component and the second connection component, the relative movement of the first housing 126 and the second housing 127 can be driven, realizing the opening and closing function of the foldable electronic device 100.

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

[0156] Figure 2 A possible folding state of the foldable electronic device 100 is shown. Among them, Figure 2 The outward folding state of the foldable electronic device 100 is shown (the outward folding state may be simply referred to as the outer fold state). Figure 2 The outward folding state shown may be, for example, a left - right outward folding state or an up - down outward folding state. The following combines Figure 1 and Figure 2 to illustrate a possible folding state of the foldable electronic device 100.

[0157] In the embodiments of the present application, the foldable electronic device 100 being in the folded state may mean that the foldable electronic device 100 is currently bent and the degree of bending 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 apart from each other, and arranged face to face, and the distance between the first cover 122 and the second cover 124 is the smallest. At least part of the first housing 126 and the second housing 127 is received in the space enclosed by the flexible display screen 110; the first display part 111, the first housing 126, the second housing 127, and the second display part 112 are arranged in layers in sequence. Similarly, the first display part 111 and the second display part 112 may be approximately parallel and spaced apart from each other, and the distance between the first cover 122 and the second cover 124 is less than the distance between the first display part 111 and the second display part 112. At this time, the first display part 111 and the second display part 112 may be regarded as being on different planes.

[0158] Combined with Figure 1 and Figure 2, when the foldable electronic device 100 is in the outward folding state, the first cover body 122 and the second cover body 124 can approach each other, and the first display portion 111 and the second display portion 112 can approach each other. The first display portion 111, the second display portion 112, and the foldable display portion 113 can form a housing area for accommodating the first cover body 122, the second cover body 124, and the rotating shaft 125. That is to say, the first cover body 122, the second cover body 124, and the rotating shaft 125 can be received in the 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 simply referred to as the inner folding state). When the foldable electronic device 100 is in the inner folding state, the first cover body 122 and the second cover body 124 can approach each other, and the first display portion 111 and the second display portion 112 can approach each other. The first cover body 122, the second cover body 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 113. That is to say, the first display portion 111, the second display portion 112, and the foldable display portion 113 can be received in the space between the first cover body 122 and the second cover body 124.

[0160] The foldable electronic device 100 can be switched 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 user's viewing range.

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

[0162] And in Figure 3 the foldable electronic device 100 shown, since it has three foldable parts (the first housing 126, the second housing 127, and the third housing 128), therefore, the foldable electronic device 100 has three forms: 1. Unfolded state; 2. Folded state; 3. Partially unfolded state.

[0163] 1. As Figure 3As shown, it 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 can be approximately 180°. The flexible display screen 110 can be in the unfolded state.

[0164] 2. As Figure 4 As shown, it is a possible folded state (three-fold state) of the foldable electronic device 100. In the folded state, the first housing 126 and the second housing 127 rotate along the rotating shaft 125, and the second housing 127 and the third housing 128 rotate along the rotating shaft 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. As Figure 5 As shown, it is a possible partially unfolded state (two-fold state) of the foldable electronic device 100. In the partially unfolded state, the angle between the first housing 126 and the second housing 127 can be approximately 180°, and the second housing 127 and the third housing 128 rotate along the rotating shaft 129, so that the third housing 128 approaches the second housing 127. At this time, the first housing 126 and the second housing 127 are regarded as being located on the same plane, and the second housing 127 and the third housing 128 can be regarded as being located on different planes. In another possible partially unfolded state, the angle between the third housing 128 and the second housing 127 can be approximately 180°, and the first housing 126 and the second housing 127 rotate along the rotating shaft 125, so that the first housing 126 approaches the second housing 127.

[0166] Figure 1 Only some components included in the electronic device 100 are schematically shown, and the actual shape, actual size, and actual structure of these components are not limited by Figure 1 defined.

[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 regarded as the front surface, the surface where the back cover is located can be regarded as the back surface, and the surface where the frame is located can be regarded as the side surface.

[0168] It should be understood that in the embodiments of the present application, when it is considered that the user holds the electronic device (usually vertically and facing the screen), the orientation of the electronic device has a top, a bottom, a left side, and a right side. It should be understood that in the embodiments of the present application, when it is considered that the user holds the electronic device (usually vertically and facing the screen), the orientation of the electronic device has a top, a bottom, a left side, and a right side.

[0169] First, Figures 6 to 9 will introduce four antenna modes involved in the present application. Among them, Figure 6It is a schematic diagram of the structure of the common mode of an antenna provided by this application, as well as the corresponding current and electric field distributions. Figure 7 It is a schematic diagram of the structure of the differential mode of another antenna provided by this application, as well as the corresponding current and electric field distributions. Figure 6 and Figure 7 The two ends of the antenna radiator in [reference] are open, and its common mode and differential mode can be respectively called the line common mode and the line differential mode. Figure 8 It is a schematic diagram of the structure of the common mode of an antenna provided by this application, as well as the corresponding current, electric field, and magnetic current distributions. Figure 9 It is a schematic diagram of the structure of the differential mode of another antenna provided by this application, as well as the corresponding current, electric field, and magnetic current distributions. Figure 8 and Figure 9 The two ends of the antenna radiator in [reference] are coupled to the ground through the floor, and its common mode and differential mode can be respectively called the slot common mode and the slot differential mode.

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

[0172] 1. Line common mode (CM)

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

[0174] The middle position 41 of antenna 40 can be, for example, the geometric center of the antenna, or the midpoint of the electrical length of the radiator. For example, the connection point of the feeding wire 42 and antenna 40 covers the middle position 41.

[0175] Figure 6(b) in shows the current and electric field distributions of the antenna 40. As Figure 6 shown in (b) in, the current shows a reverse distribution on both sides of the middle position 41, for example, a symmetric distribution; the electric field shows a same-direction distribution on both sides of the middle position 41. As Figure 6 shown in (b) in, the current at the feeder line 42 shows a same-direction distribution. Based on the same-direction distribution of the current at the feeder line 42, Figure 6 the feeding shown in (a) in can be called the line CM feeding. Based on the reverse distribution of the current on both sides of the connection between the radiator and the feeder line 42, Figure 6 the antenna pattern shown in (b) in can be called the line CM pattern (which can also be simply called the CM pattern. For example, for a wire antenna, the CM pattern refers to the line CM pattern). Figure 6 The current and electric field shown in (b) in can be respectively called the current and electric field of the line CM pattern.

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

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

[0178] As Figure 7 (a) in shows that the left and right ends of the two radiators of the antenna 50 are open ends, and a feeding circuit is connected at the middle position 51. In one embodiment, the feeding form of the antenna 50 adopts anti-symmetrical feeding. One end of the feeding circuit is connected to one of the radiators through the feeder line 52, and the other end of the feeding circuit is connected to the other radiator through the feeder 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 "central anti-symmetrical feeding" mentioned in the present 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 midpoints of the radiator. In one embodiment, the signal amplitudes output by the positive and negative poles of the feeding unit are the same, and the phases are opposite, for example, the phase difference is 180° ± 10°.

[0180] Figure 7 (b) in shows the current and electric field distributions of the antenna 50. As Figure 7 shown in (b) in, the current shows a same-direction distribution on both sides of the middle position 51 of the antenna 50, for example, an anti-symmetric distribution; the electric field shows a reverse distribution on both sides of the middle position 51. As Figure 7As shown in (b) thereof, the current at the feeder line 52 shows a reverse distribution. Based on the reverse distribution of the current at the feeder line 52, Figure 7 such feeding as shown in (a) thereof can be referred to as line DM feeding. Based on the fact that the current shows a co-directional distribution on both sides of the connection between the radiator and the feeder line 52, Figure 7 such an antenna pattern as shown in (b) thereof can be referred to as line DM pattern (which can also be simply referred to as DM pattern. For example, for a line antenna, the DM pattern refers to the line DM pattern). Figure 7 The current and electric field as shown in (b) thereof can be respectively referred to as the current and electric field of the line DM pattern.

[0181] The current is stronger at the middle position 51 of the antenna 50 (the current maximum point is near the middle position 51 of the antenna 50), and weaker at both ends of the antenna 50, as Figure 7 shown in (b) thereof. The electric field is weaker at the middle position 51 of the antenna 50 and stronger at both ends of the line antenna 50.

[0182] It should be understood that for an antenna radiator, it can be understood as a metal structural member that generates radiation, and the number thereof can be one piece, as Figure 6 shown, or it can also be two pieces, as Figure 7 shown, and can be adjusted according to actual design or production requirements. For example, for the line CM pattern, two radiators can also be used as Figure 7 shown. The two ends of the two radiators are arranged oppositely and separated by a gap, and a symmetric feeding method is adopted at the two ends close to each other. For example, the same feed source signal is respectively fed into the two ends close to each other of the two radiators, and an effect similar to that of the antenna structure as Figure 6 shown can also be obtained. Correspondingly, for the line DM pattern, one radiator can also be used as Figure 6 shown. Two feeding points are arranged at the middle position of the radiator and an anti-symmetric feeding method is adopted. For example, signals with the same amplitude and opposite phases are respectively fed into two symmetric feeding points on the radiator, and an effect similar to that of the antenna structure as Figure 7 shown can also be obtained.

[0183] 3. Line CM-DM pattern

[0184] The above Figure 6 and Figure 7 respectively show that when both ends of the radiator are open, different feeding methods are used to respectively generate the line CM pattern and the line DM pattern.

[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 weaker at the middle position of the antenna 60 and stronger at both ends of the antenna 60. The electric field is stronger at the middle position of the antenna 60 (the electric field maximum point is near the middle position of the antenna 60), and weaker at both ends of the antenna 60, as Figure 8 shown in (b) of

[0190] 5. Slot DM mode

[0191] As Figure 9 shown in (a) of

[0192] Figure 9 the radiator of the antenna 70 has a hollowed-out slot or gap 72, or alternatively, the radiator of the antenna 70 and the ground (such as the floor, which can be a PCB) enclose the slot or slot 72. The slot 72 can be formed by opening a slot in the floor. The middle position 71 of the slot 72 is connected to the feeding circuit, and symmetric feeding is adopted. It should be understood that symmetric feeding can be understood as one end of the feeding circuit is connected to the radiator, and the other end is coupled to the ground through the floor. Among them, the coupling point (feeding point) of the feeding circuit and the radiator is located at the center of the radiator. The center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or a region 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. For example, the connection point of the feeding circuit and the radiator covers the middle position 51 of this side.

[0192] Figure 9 Figure 9 Figure 9 Figure 9 Figure 9 shown in (b) of

[0193] The current is weaker at the middle position of the antenna 70 and stronger at both ends of the antenna 70. The electric field is stronger at the middle position of the antenna 70 (the electric field maximum is near the middle position of the antenna 60) and weaker at both ends of the slot antenna 70, as Figure 9 shown in (b) of

[0194] It should be understood that for the radiator of the antenna, it can be understood as a metal structure that generates radiation (such as including a part of the floor), and it can include openings, as Figure 8 shown, or it can also be a complete ring, as Figure 9 shown, and it can be adjusted according to actual design or production needs. For example, for the slot CM mode, a complete ring radiator can also be used as Figure 9 shown. 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 both ends of the original opening position, and similar effects to the Figure 8 shown antenna structure can also be obtained. Correspondingly, for the slot DM mode, a radiator including an opening can also be used as Figure 8 shown. A symmetric feeding method is adopted at both ends of the opening position. For example, the same feed source signal is fed into both ends of the radiator on both sides of the opening, and similar effects to the Figure 9 shown antenna structure can also be obtained.

[0195] 6. Slot CM-DM mode.

[0196] The above Figure 8 and Figure 9 respectively show that different feeding methods are adopted for the slot structure to generate the slot CM mode and the slot DM mode respectively.

[0197] When the feeding form of the antenna adopts asymmetric feeding (the feeding point deviates from the middle position, including edge feeding or offset feeding), or the opening on one side of the slot is asymmetric (the opening deviates from the middle position of that 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 distributions are as Figure 8 shown in (b) of Figure 9 The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distributions are as

[0198] shown in (b) of

[0199] Meanwhile, when the two antenna structures operate in two operating modes where the electric fields are orthogonal (the inner product of the electric fields in the far field is zero (integral orthogonality)) (the electric fields are symmetrically distributed or anti-symmetrically distributed), there is also good isolation between the two antenna structures, and they can be used as sub-units in the MIMO antenna system of an electronic device.

[0200] It should be understood that the two antenna structures can be understood as antenna structures fed with signals by a first feeding circuit and a second feeding circuit respectively. The first feeding circuit and the second feeding circuit are different. In an 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] 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. A part of the first frame serves as a radiation stub (including a feeding point), and a part of the second frame serves as a parasitic stub. By providing a slit in the parasitic stub, the radiation aperture of the antenna is increased to improve the radiation characteristics of the antenna.

[0202] Figure 10 FIG. 11 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0203] As Figure 10 shown, the foldable electronic device 100 may include a first housing 201, a second housing 202, and a ground plane 101.

[0204] Among them, the first housing 201 includes a first frame 210, and at least a part of the first frame 210 is spaced apart from the ground plane 101. The second housing 202 includes a second frame 220, and at least a part of the second frame 220 is spaced apart from the ground plane 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 ground plane 101 or provided with a first slit at the first position 211. In one embodiment, the first frame 210 is coupled to the ground plane 101 or provided with a second slit at the second position 212.

[0206] It should be understood that in the embodiments of the present application, the coupled connection is only illustrated by taking electrical connection as an example. In actual production or practice, it can also be realized by an indirect coupling method. For the sake of brevity of the discussion, it will not be elaborated 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 ground plane 101 at the third position 221, and the second frame 220 is provided with a third slit at the fourth position 222.

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

[0209] It should be understood that in Figure 10 the foldable electronic device 100 shown, the first rotating shaft 203 is directly connected to the first housing 201 and the second housing 202 respectively, enabling the first housing 201 and the second housing 202 to rotate relative to each other. In addition, "the first rotating shaft 203 is respectively rotatably connected to the first housing 201 and the second housing 202" includes the situation where the first rotating shaft 203 can be rotatably connected to the first or second housing through one or more second rotating shafts and one or more intermediate housings. For example, in one embodiment, the foldable electronic device 100 may further include a first rotating shaft and a second rotating shaft, and one or more intermediate housings located between the first rotating shaft and the second rotating shaft. The first rotating shaft is located between the first housing 201 and the intermediate housing, and the first rotating shaft is respectively rotatably connected to the first housing 201 and the intermediate housing, enabling the first housing 201 and the intermediate housing to rotate relative to each other. The second rotating shaft is located between the intermediate housing and the second housing 202, and the first rotating shaft 203 is respectively rotatably connected to the intermediate housing and the second housing 202, enabling the intermediate housing and the second housing 202 to 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] Wherein, the first radiator 230 is the conductive part 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 the conductive part of the second frame 220 between the third position 221 and the fourth position 222. A fourth slit is provided on the second radiator 240, or in other words, the fourth slit is provided on the second frame 220 between the third position 221 and the fourth position 222. Two ends of the first element 252 are respectively coupled to the radiator parts 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; 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] Wherein, the length of the second radiator 240 may be greater than or equal to three - halves of the length of the first radiator 230 and less than or equal to five - halves 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] Wherein, 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, there may also be a slit on the first radiator 230, or rather, there may be a slit between the first position 211 and the second position 212 of the first frame 210, and corresponding components may be provided. The two ends of the component are respectively coupled to the radiator parts of the first radiator 230 on both sides of the slit. In this way, the structures of the first radiator 230 and the second radiator 240 are similar and their lengths are also relatively close. For details, reference may be made to the embodiment part shown below. Figure 44 The embodiment part 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 above - mentioned fourth slit between the first coupling point 241 and the second coupling point 242. The first end of the first component 252 is coupled to the first coupling point 241, and the second end of the first component 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 (e.g., 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 slot is less than or equal to 5 mm. Herein, the distance between the first coupling point 241 and the second coupling point 242 and the fourth slot 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 slot. When the first element 252 is electrically connected to the first coupling point 241 and the second coupling point 242 through a spring contact, the distance to the fourth slot can be understood as the minimum distance between the center of the part where the spring contact touches the coupling point and the conductors on both sides of the fourth slot.

[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 equivalent capacitance after the distributed capacitance formed by the fourth slot and the first element 252 are connected in parallel. The capacitance value of this 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 slot (e.g., the width of the fourth slot, the relative dielectric constant of the medium filled in the fourth slot).

[0225] In one embodiment, 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.

[0226] According to the embodiments of the present application, since the second frame is coupled to the floor at the third position 221, the current near the third position is relatively strong, and when a slot is opened at the fourth position, the current near the fourth position is relatively weak. When the fourth slot is provided in the region where the current on the second radiator 240 is relatively strong, the effect of reducing the intensity of the single strong current point of the second radiator through 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 provided between the midpoint of the second radiator 240 and the grounding 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 provided between the midpoint of the second radiator 240 and the grounding 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 provided 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 provided 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 above fourth slot is provided, for the region with a relatively large current of the second radiator 240, should be understood as corresponding to the second radiator 240 without a slot (e.g., operating in the quarter-wavelength mode). When the fourth slot is provided, the current intensity at the corresponding position becomes weaker, achieving the effect of evenly distributing the current.

[0232] When the foldable electronic device 100 is in the folded state, the first radiator 230 and the second radiator 240 at least partially overlap in the first direction, and the first direction is the thickness direction of the foldable electronic device 100, e.g., the 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 being used to generate a first parasitic resonance can be understood as both the whole of the second radiator 240 and the first element 252 being used to generate the first parasitic resonance. The electrical parameters of the second radiator 240 (e.g., electrical length), and the electrical parameters of the first element 252 (e.g., equivalent capacitance value or equivalent inductance value), directly affect the first parasitic resonance (e.g., the frequency of the resonance point). In a comparative embodiment, without setting the first element 252, the resonance point of the second parasitic resonance will shift beyond the range of the first threshold from the target frequency band, and the first threshold can be greater than or equal to 200 MHz.

[0235] The first radiator 230 being used to generate a first resonance can be understood as the whole radiator being used to generate this resonance. At the same time, it should not be understood that other components (e.g., the first element 252) or other radiators (e.g., the parasitic radiator in the first housing or the parasitic radiator in the second housing) do not affect this resonance.

[0236] In one embodiment, the technical solutions of "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. Among them, the influence of the presence or absence of the first element 252 on the first parasitic resonance is greater than that on the first resonance. Compared with the solution of the present application, in the solution without the first element 252, the frequency difference of the resonance point of the first parasitic resonance is greater than that of the first resonance. For example, the frequency difference of the resonance point of the first parasitic resonance is more than 2 times, or more than 5 times, that of the first resonance.

[0237] It should be understood that for the technical solution provided by the embodiment of the present application, when the foldable electronic device 100 is in the folded state, the first radiator 230 in the antenna 200 serves as the main radiation branch (the branch to which the signal is fed at the feeding point), and the second radiator 240 serves as the parasitic branch (the branch that couples the signal by coupling with the main radiation branch). The second radiator 240 can generate the first parasitic resonance through coupling with the first radiator 230. The resonance frequency of the first parasitic resonance can be determined by the length of the second radiator 240. The resonance 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, 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 parasitic resonance is made to approach the first resonance. The first resonance and the first parasitic resonance jointly form a working frequency band to expand the working bandwidth of the antenna 200 and jointly support a working frequency band of the foldable electronic device 100.

[0238] Among them, the fact that the first resonance and the first parasitic resonance jointly form a working frequency band can be understood as that the first parasitic resonance is close to the first resonance and jointly forms 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 -4 dB to form a resonance frequency band.

[0239] Moreover, setting an operating frequency band of the foldable electronic device 100 between the first coupling point 241 and the second coupling point 242 can be understood as a frequency range. For example, the low-frequency band (LB) (698 MHz - 960 MHz), the middle-frequency band (MB) (1710 MHz - 2170 MHz), or the high-frequency band (HB) (2300 MHz - 2690 MHz) in a cellular network. Taking an operating frequency band of the foldable electronic device 100 as LB (698 MHz - 960 MHz) as an example, this operating frequency band may include multiple communication frequency bands within this frequency range. For example, B5, B8, etc., which can be correspondingly understood 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 600 MHz - 1.5 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance can 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 600 MHz - 1.5 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance can 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 1.5 GHz - 3 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance can 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 1.5 GHz - 3 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance can 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 3 GHz - 6 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance can 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 3 GHz - 6 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance can 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 a first element 252 is coupled (the fourth gap provided on the second radiator 240 can be regarded as an equivalent capacitor provided on the second radiator 240, for example, a distributed capacitor, 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 uniform, which can reduce the conductor loss and dielectric loss brought by the conductors and dielectrics 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 uniform, which can increase the radiation aperture of the second radiator 240. Therefore, providing a fourth gap between the first coupling point 241 and the second coupling point 242 and coupling the first element 252 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 (the branch where the signal is fed in at the feeding point), and the embodiments of the present application do not limit the antenna structure formed by the first radiator 230. For example, different antenna structures can be formed by adjusting the first end and the second end of the first radiator 230 to be a grounded end or an open end (for example, the first frame 210 is coupled to the floor 101 or provided with a first gap at the first position 211, and the first frame 210 is coupled to the floor 101 or provided with a second gap at the second position 212). The antenna structure formed by the first radiator 230 can operate in different antenna modes. For example, when the first end and the second end of the first radiator 230 are open ends, the first radiator can operate in the above-mentioned line CM-DM mode. When the first end and the second end of the first radiator 230 are grounded ends, the first radiator can operate in the above-mentioned slot CM-DM mode. When one of the first end and the second end of the first radiator 230 is a grounded end and the other is an open end, the first radiator 230 can operate in the 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 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 the 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 gap is less than the length of the second radiator 240 between the third gap and the fourth gap.

[0247] It should be understood that since the second frame 220 is coupled to the floor at the third position 221, the current of the second radiator 240 is stronger near the third position 221 and weaker near the fourth position 222. When the fourth slot is provided in the region where the current is stronger, the effect of reducing the intensity of the 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 brought by the conductors and dielectrics provided 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, and the radiation aperture of the second radiator 240 is more significantly improved, 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 arranged adjacent to each other in the first direction (for example, no other conductors are provided between the first radiator 230 and the second radiator 240). In one embodiment, when the first frame 210 is provided with a slot at the first position / second position 212, the slot provided in the first frame 210 is aligned with the third slot or the fourth slot, so that when an electrical signal is fed, the third slot or the fourth slot can couple more energy through the electric field at the slot 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 embodiments of the present application, alignment can be understood as that the two slots at least partially overlap 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 arranged at intervals in the first direction (for example, other conductors are provided between the first radiator 230 and the second radiator 240. For example, in a multi-folded electronic device, the first radiator 230 and the second radiator 240 are arranged on non-adjacent housings). In one embodiment, when the first frame 210 is provided with a slot at the first position / second position 212, the slot provided in the first frame 210 is aligned with the third slot or the fourth slot, so that when an electrical signal is fed, the third slot or the fourth slot can couple more energy through the electric field at the slot 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 also be 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 the main radiation stub. Meanwhile, in one embodiment, when the foldable electronic device 100 is in the folded state, the second radiator 240 may serve as a parasitic stub in the antenna 200 and at the same time be fed with an electrical signal by the second feeding point to serve as the main radiation stub of another antenna. The embodiments of the present application do not limit this.

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

[0253] As Figure 11 shown, the first frame 210 is coupled to the floor at the first position 211 and is provided with a second slot at the second position 212. The second frame 220 is coupled to the floor at the third position 221 and is provided with a third slot at the fourth position 222.

[0254] It should be understood that, as shown in Figure 10 the two-dimensional schematic diagram, and Figure 11 the three-dimensional schematic diagram shown, the second slot at the second position 212, and the fourth slot 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 slots provided on different frames can be understood similarly. For example, in the three-dimensional diagram, the slots are staggered for easier display of the radiator structures on different frames of the foldable electronic device 100.

[0255] In one embodiment, the width of the second slot / third slot / fourth slot is greater than or equal to 0.1 mm and less than or equal to 2 mm. It should be understood that in the embodiments of the present application, the widths of the slots provided on the frames can all 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. The first end of the second element 253 is coupled to the third coupling point 243, and the second end of the second element 253 is coupled to the floor.

[0257] It should be understood that in the technical solution provided by the embodiments 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 provided 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. By providing the first element 252 and / or the second element 253, the current density on the second radiator 240 can be dispersed (for example, reducing the intensity of a single current strong point and making 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 conductors and dielectrics 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 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 reverse in the area near the third coupling point 243, making the electric field generated by the second radiator 240 continuous. Therefore, the electric field cannot reach zero at the third coupling point 243, making the electric field generated by the radiator continuous and not reverse (for example, not including the electric field reverse area), without zero points, dispersing the current density on the total radiator, increasing the radiation aperture of the second radiator 240, equivalently increasing the total radiation aperture of the antenna 200 (the total radiation aperture of the first radiator 230 and the second radiator 240), reducing the loss caused by the conductors and dielectrics, and improving the radiation characteristics of the antenna.

[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 embodiments of the present application is used to disperse the current density on the radiator, thereby reducing the loss caused by the radiator and the conductors provided around the radiator. In one embodiment, the second element 253 can affect the frequency of the resonance point to a certain extent, but it is different from the tuning circuit mainly used to adjust the frequency of the resonance point. In addition, no switch is provided at the first element to switch frequency bands, as the switch will introduce additional insertion loss and reduce 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. When the antenna 200 operates at 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 the 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 ground plane as the ground end, and the second end is the 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 slot, the electrical length of the second radiator 240 can be made greater than three-eighths of the first wavelength, the current on the second radiator 240 is in the same direction (e.g., does not reverse), and the electric field between the second radiator 240 and the ground plane does not reverse. The electrical length of the second radiator 240 increases from a quarter-wavelength of the first wavelength to more than three-eighths of the first wavelength, but still operates in the 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 ground plane is weakened, thereby reducing the losses brought by the radiator and the conductors and dielectrics arranged around the radiator, and thus improving the radiation characteristics of the antenna 200.

[0264] In one embodiment, the first radiator 230 may be used to generate a first resonance. In one embodiment, the first end of the first radiator 230 is coupled to the ground plane as the ground end, and the second end is the open end. The first radiator 230 may operate in the quarter-wavelength mode. The electrical length of the first radiator is a 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 five-halves 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 a quarter of the first wavelength. The electrical length between the fourth position 222 and the fourth slot is less than a half of the first wavelength.

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

[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 ends of the first element 252 and the second element 253 may be coupled to the first coupling point 241 (the third coupling point 243) through the same connecting member.

[0270] When the third coupling point 243 may be located between the third position 221 and the first coupling point 241, the relationship between the first element 252 and the second element 253 is similar to a series relationship. In one embodiment, the second element 253 may be an inductor, which can further increase the radiation aperture of the second radiator. In one embodiment, the second element may 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 simultaneously to achieve parasitic resonance at the desired frequency band.

[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 may be coupled to the second coupling point 242 (the third coupling point 243) through the same connecting member.

[0273] When the third coupling point 243 can be located between the fourth position 222 and the second coupling point 242, the relationship between the first element 252 and the second element 253 is similar to a parallel connection. In one embodiment, the second element 253 can be a capacitor, which can increase the equivalent capacitance between the first coupling point 241 and the third coupling point 243. In one embodiment, when the equivalent capacitance value of the first element 252 is 2 pF, the loss is relatively high. However, the second element 253 can be utilized 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 1 pF, the equivalent capacitance value of the second element 253 is 1 pF, and the equivalent capacitance value between the first coupling point 241 and the third coupling point 243 is 2 pF), 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 simultaneously to achieve parasitic resonance at the desired frequency band.

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

[0275] In one embodiment, a third coupling point 243 can 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. Each third coupling point 243 is coupled to the ground through a corresponding second element 253.

[0276] In one embodiment, switches can be provided between the first element 252 and / or the second element 253 and the second radiator 240, for the position of parasitic resonance, or it can be understood as for switching the radiation aperture of the second radiator 240. The switch can be used to switch the first element 252 and / or the second element 253 with 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. The second element 253 or the inductor, capacitor, or 0-ohm resistor can be switched by the switch. Alternatively, the switch can be used to switch the position of the third coupling point 243, such that the third coupling point 243 is 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 slot at the second position 212 and the fourth slot provided on the second radiator 240 overlap at least partially in a first direction (e.g., the z direction). Alternatively, the second slot at the second position 212 and the third slot at the fourth position 222 overlap at least partially in the first direction (e.g., the z direction).

[0280] It should be understood that when the second slot at the second position 212 and the fourth slot (or the third slot at the fourth position 222) overlap partially in the first direction, when an electrical signal is fed into the first feeding point 231, the second radiator 240 can couple to more energy through the electric field at the slot, thereby enhancing the radiation characteristics of the resonance 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 value 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 different first parasitic resonances, the current distribution on the second radiator 240 can be made more uniform, reducing conductor loss and dielectric loss, increasing the radiation aperture of the second radiator 240, thereby enhancing 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 a first threshold. The first threshold may be designed according to the resonant point frequency of the first parasitic resonance generated by the second radiator 240. When the resonant point frequency of the first parasitic resonance is less than or equal to 1 GHz, the first threshold is 10 pF. When the resonant point frequency of the first parasitic resonance is greater than 1 GHz, the first threshold 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 resonant point of different first parasitic resonances, the current distribution on the second radiator 240 can be made more uniform, reducing conductor loss and dielectric loss, increasing the radiation aperture of the second radiator 240, and thus improving the radiation characteristics of the antenna.

[0287] In one embodiment, when the first element 252 is a capacitor, it can be implemented by a distributed capacitance structure formed by extending conductors on both sides of the fourth slot (e.g., at the first coupling point 241 and / or the second coupling point 242) into the electronic device, as shown in (a) and (b) of Figure 12 In one embodiment, when the first element 252 is an inductor, the metal piece electrically connected between the first coupling point 241 and the second coupling point 242 can be equivalent to an inductor, as shown in (b) of Figure 12 It should be understood that for the sake of simplicity of discussion, only the first element 252 is taken as an example for illustration. The elements described in the embodiments of the present application can be implemented by distributed devices or lumped devices.

[0288] Figure 13 is a schematic diagram of another foldable electronic device 100 provided by the embodiments of the present application.

[0289] As shown in Figure 13 the foldable electronic device 100 includes an antenna 300.

[0290] It should be understood that Figure 13 the difference between the antenna 300 shown in Figure 11 and the antenna 200 shown in

[0291] Figure 14 and Figure 15 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. Figure 11 and Figure 13 are the simulation result diagrams of the antennas shown in Figure 14 is Figure 11 and Figure 13 the S-parameter simulation result diagram of the antennas shown in Figure 15 is Figure 11 and Figure 13 the simulation results of the radiation efficiency and system efficiency of the antennas shown in

[0292] As shown Figure 14 in, the S-parameter simulation results of the antenna shown Figure 11 and Figure 13 are shown.

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

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

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

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

[0297] In Figure 11 the antenna 200 shown, since the second radiator is coupled to the ground through the first element at the first coupling point, when the second radiator is coupled to the energy generated by the first radiator to resonate, 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 more evenly distributed, thereby reducing the losses caused by the second radiator and the conductors and dielectrics 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 Figure 13 the antenna 300 shown Figure 11 the radiation efficiency and system efficiency of the antenna 200 shown are higher.

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

[0299] As Figure 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. Among them, 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 the conductive part 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 slot is provided at the sixth position 214.

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

[0302] It should be understood that Figure 17 the antenna 200 shown and Figure 10 the antenna 200 shown are only different 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 can form a first antenna unit. The third radiator 250 and the second feeding circuit 254 can form a second antenna unit. The second radiator 240 can simultaneously serve as parasitic branches of the first antenna unit and the second antenna unit to improve the radiation characteristics of the first antenna unit and the second antenna unit. And, since the first antenna unit and the second antenna unit can reuse the second radiator 240, the miniaturization of the overall structure of the antenna can be achieved while improving the radiation characteristics of the first antenna unit and the second antenna unit at the same time.

[0304] In one embodiment, the second radiator 240 can be used to generate a first parasitic resonance. The first parasitic resonance can 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 can be coupled to the floor through a grounding member at the fifth position 213. In one embodiment, the width of the grounding member can be greater than or equal to 2 mm to ensure good isolation between the first antenna unit and the second antenna unit.

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

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

[0308] Figures 18 to 20 Yes Figure 17 It is a simulation result diagram of the antenna shown. Among them, Figure 18 Yes Figure 17 It is an S-parameter simulation result diagram of the antenna shown. Figure 19 Yes Figure 17 It is the simulation result of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 20 Yes Figure 17 It is the simulation result of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0309] As Figure 18 shown, it shows Figure 17 the S-parameter simulation result of the antenna shown.

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

[0311] The second antenna element (S22) can generate a resonance near 1.56 GHz, and this resonance can be generated by the third radiator (the second resonance).

[0312] Within the above frequency bands, the isolation degree (S12) between the first antenna element and the second antenna element is less than -15 dB, and there is good isolation between the two antenna elements.

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

[0314] As Figure 19As shown, when the foldable electronic device is in the folded state, compared with the case where the foldable electronic device does not have the second radiator and only the first radiator generates 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.

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

[0316] As Figure 20 shown, when the foldable electronic device is in the folded state, compared with the case where the foldable electronic device does not have the second radiator and only the third radiator generates resonance, after the second radiator is provided, the system efficiency and the radiation efficiency of the second antenna unit are both improved.

[0317] It should be understood that the resonance points of the first parasitic resonance generated by the second radiator are at 1.92 GHz or 2.4 GHz respectively, which are far from the resonance point (1.56 GHz) of the second resonance generated by the third radiator and are not shown in the S-parameters shown in Figure 18 However, the first parasitic resonance is obvious in improving the system efficiency and the radiation efficiency of the second antenna unit.

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

[0319] As Figure 21 shown, the third radiator 250 is a conductive part between the second position 212 and the sixth position 214. The first frame 210 is coupled to the ground at the fifth position 213, and a sixth slit 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. 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. The third element 255 can be used to make the third radiator 250 operate in the DM mode.

[0321] It should be understood that Figure 21 the antenna 200 shown in Figure 17 is only different from the antenna 200 shown in Figure 17 in the operating mode of the third radiator 250. In the antenna 200 shown in Figure 21 the first end of the third radiator 250 is coupled to the ground as the ground end, and the second end is an open end, and it can operate in the quarter-wavelength mode. In the antenna 200 shown in

[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] Figures 22 to 24 Yes Figure 21 It is a simulation result diagram of the antenna shown. Among them, Figure 22 Yes Figure 21 It is a simulation result diagram of the S-parameters of the antenna shown. Figure 23 Yes Figure 21 It is the simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 24 Yes Figure 21 It is the simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0325] As Figure 22 shown, it shows Figure 32 the simulation results of the S-parameters of the antenna shown.

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

[0327] The second antenna element (S22) can generate a resonance near 1.58 GHz, and this resonance can be generated by the third radiator (the second resonance).

[0328] Within the above frequency band, the isolation degree (S12) between the first antenna element and the second antenna element is less than -15 dB, and there is good isolation between the two antenna elements.

[0329] As Figure 23 shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator, and only the first radiator generates resonance, the first antenna element generates resonance by the first radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved.

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

[0331] As Figure 24As shown, when the foldable electronic device is in the folded state, compared with the case where the foldable electronic device does not have the second radiator and the second antenna only resonates due to the third radiator, after the second radiator is provided, both the system efficiency and radiation efficiency of the second antenna unit are improved.

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

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

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

[0335] As Figure 25 shown, the foldable electronic device 100 may further include a third housing 204 and a second rotating shaft 205. The second rotating shaft 205 is located between the second housing 202 and the third housing 204, and the second rotating 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 on the third frame 260. The fifth position 213 and the sixth position 214 may be located on the second frame 220. The first radiator 230 is the conductive part between the first position 211 and the second position 212. The second radiator 220 is the conductive part between the third position 221 and the fourth position 222. The third radiator 250 includes the conductive part between the fifth position 213 and the sixth position 214.

[0338] It should be understood that Figure 25 the antenna 200 shown and Figure 16The difference between the shown antenna 200 lies only in the third position 221 and the fourth position 222, as well as the fifth position 213 and the sixth position 214. The first radiator 230 and the third radiator 250 are respectively located on the first housing 201 and the second housing 202, and the second radiator 240 is located on the third housing 204.

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

[0340] In one embodiment, the third radiator 250 is used to generate a second resonance. In one embodiment, the resonance frequency band of the first resonance generated by the first radiator 230 is the same as 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 brevity in the discussion, the embodiments of the present application are described only by taking the example that the resonance frequency band of the first resonance is the same as the resonance frequency band of the second resonance.

[0342] In one embodiment, the resonance frequency band of the first resonance is the same as or adjacent to the resonance frequency band of the second resonance. The first parasitic resonance can be close to both the first resonance and the second resonance simultaneously, and can be used to improve the radiation performance of both the first antenna unit and the second antenna unit simultaneously. 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] Figures 27 to 29 is Figure 25 the simulation result diagram of the shown antenna. Among them, Figure 27 is Figure 25 the S-parameter simulation result diagram of the shown antenna. Figure 28 is Figure 25 the simulation results of the radiation efficiency and system efficiency of the first antenna unit in the shown antenna. Figure 29 is Figure 25 the simulation results of the radiation efficiency and system efficiency of the second antenna unit in the shown antenna.

[0344] As Figure 27 shown, it shows Figure 25 the S-parameter simulation results of the shown antenna.

[0345] The first antenna element (S11) can generate resonances around 1.95 GHz and around 2.15 GHz. Among them, the resonance generated around 1.95 GHz can be generated by the first radiator (the first resonance), and the resonance generated around 2.15 GHz can be generated by the second radiator (the first parasitic resonance).

[0346] The second antenna element (S22) can generate resonances around 1.95 GHz and around 2.15 GHz. Among them, the resonance generated around 1.95 GHz can be generated by the third radiator (the second resonance), and the resonance generated around 2.15 GHz can be generated by the second radiator (the first parasitic resonance).

[0347] Within the above frequency bands, since the first antenna element and the second antenna element reuse the first parasitic resonance generated by the second radiator to expand the operating bandwidth, the isolation degree (S12) between the first antenna element and the second antenna element is reduced compared with the above embodiment, and the isolation degree between the first antenna element and the second antenna element is less than -9 dB.

[0348] It should be understood that in the above embodiment, only the case where the first antenna element and the second antenna element have the same frequency is taken as an example for illustration. The first antenna element and the second antenna element may include the same communication frequency band and serve as sub-units in the MIMO system.

[0349] As Figure 28 shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator and only the first radiator generates resonance, the first antenna element generates resonance 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 1.5 dB, and the radiation efficiency is improved by about 1 dB.

[0350] As Figure 29 shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator and only the third radiator generates resonance, the second antenna element generates resonance by the third radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved. The system efficiency is improved by about 2.5 dB, and the radiation efficiency is improved by about 2 dB.

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

[0352] As Figure 30 shown, the second frame 220 is respectively provided with a fifth slit and a sixth slit at the fifth position 213 and the sixth position 214. 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 ground point may be located in the central region of the second side frame 220 between the fifth position 213 and the sixth position 214. Herein, the central region may be understood as the region 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 in Figure 26 the shown antenna 200, the first end of the third radiator 250 is coupled to the floor as the ground end, and the second end is the open end, and it can operate in the quarter-wavelength mode. In Figure 30 the shown antenna 200, the first end and the second end of the third radiator 250 are open ends, forming a symmetric T-shaped structure and operating in the line CM mode.

[0355] In one embodiment, the current on the third radiator 250 shows a reverse distribution on both sides of the ground point, such as a symmetric distribution. Correspondingly, the third radiator 250 can operate in the line CM mode.

[0356] Figures 31 to 33 is Figure 30 the simulation result diagram of the shown antenna. Among them, Figure 31 is Figure 30 the S-parameter simulation result diagram of the shown antenna. Figure 32 is Figure 30 the simulation results of the radiation efficiency and the system efficiency of the first antenna element in the shown antenna. Figure 33 is Figure 30 the simulation results of the radiation efficiency and the system efficiency of the second antenna element in the shown antenna.

[0357] As Figure 31 shown, it shows Figure 30 the S-parameter simulation results of the shown antenna.

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

[0359] The second antenna element (S22) can generate a resonance near 1.95 Hz, and this resonance can be generated by the third radiator (the second resonance).

[0360] It should be understood that the third radiator operates in the line CM mode, and the current on the third radiator shows a reverse distribution, such as a symmetric distribution. The second radiator operates in the quarter-wavelength mode, and the current on the second radiator shows a co-directional distribution. Therefore, when an electrical signal is fed into the third radiator, the second radiator cannot be excited to generate the first parasitic resonance, and the second antenna element cannot utilize the first parasitic resonance to expand the operating bandwidth. However, since the second antenna element cannot utilize the first parasitic resonance, the isolation degree (S12) between the first antenna element and the second antenna element is relatively good, less than -13 dB.

[0361] As Figure 32 shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator, where only the first radiator generates resonance, the first antenna element generates resonance from both 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 3 dB, and the radiation efficiency is improved by about 1.5 dB.

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

[0363] Figure 34 FIG. 14 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0364] As Figure 34 shown, the antenna 200 may further include a third element 255. The third radiator 250 may further include a fourth coupling point 244, and the fourth coupling point 244 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 floor.

[0365] It should be understood that compared with Figure 30 the antenna 200 shown, Figure 34 the difference between the antenna 200 shown and Figure 30 the antenna 200 shown is only that the third element 255 is provided. In Figure 34 the antenna 200 shown, the third radiator 250 may operate in the line CM mode, and the current on the third radiator 250 shows a reverse distribution on both sides of the ground point, such as a symmetric distribution. While in

[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] Figures 35 to 37 is Figure 34 the simulation result diagram of the antenna shown. Among them, Figure 35 is Figure 34 the simulation result diagram of the S-parameters of the antenna shown. Figure 36 is Figure 34 the simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 37 is Figure 34 the simulation results of the radiation efficiency and system efficiency of the second antenna element in the antenna shown.

[0368] As Figure 35 shown, it shows Figure 34 the simulation results of the S-parameters of the antenna shown.

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

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

[0371] In the above frequency band, since the first parasitic resonance generated by the second radiator is multiplexed by the first antenna element and the second antenna element to expand the operating bandwidth, the isolation degree (S12) between the first antenna element and the second antenna element is lower than that in the above embodiment, and the isolation degree between the first antenna element and the second antenna element is less than -8 dB.

[0372] As Figure 36 shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator and only the first radiator generates resonance, the first antenna element generates resonance by the first radiator and the second radiator, and the system efficiency and radiation efficiency are approximately the same.

[0373] As Figure 37 shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator and only the first radiator generates resonance, the second antenna element generates resonance by the third radiator and the second radiator, and both the system efficiency and the radiation efficiency are improved. The system efficiency is improved by about 3.5 dB, and the radiation efficiency is improved by about 2 dB.

[0374] It should be understood that referring to Figure 32, Figure 33 and ​ , ​ As shown in the simulation results, when the third radiator operates in the CM mode, the second radiator, as a parasitic stub, can improve the system efficiency and radiator efficiency of the first antenna element. When the third radiator operates in the DM mode, the second radiator, as a parasitic stub, can improve the system efficiency and radiator efficiency of the second antenna element.

[0375] ​ FIG. 10 is a schematic diagram of a foldable electronic device 100 provided by 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 taken as an example where they do not overlap in the first direction. The first direction is the thickness direction of the foldable electronic device 100, for example, the z direction. In the ​ foldable electronic device 100 shown, the first radiator 230 and the third radiator 250 overlap at least partially in 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 side frame 220 between the first position 211 and the second position 212 includes a grounding point, and the second side 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 included between the grounding point and the second position 212, and a fifth coupling point 245 is further included between the feeding point and the grounding point. The first end of the first tuning device 256 is coupled to the fourth coupling point 244, and the second end is coupled to the floor. The first end of the second tuning device 257 is coupled to the fifth coupling point 245, and the 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, they can be used to adjust the operating mode of the first radiator.

[0379] For the sake of simplicity in discussion, it is exemplified that the first radiator 230 can operate in the line DM mode. In practical applications, the first tuning device 256 and the second tuning device 257 can enable the first radiator 230 to operate in different operating modes. In one embodiment, adjusting the first tuning device 256 and the second tuning device 257 can enable the first radiator 230 to operate 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 radiate from the part between the first position 211 and the ground point and operate in the quarter-wavelength mode. In one embodiment, when the first tuning device 256 is equivalent to a short circuit and the second tuning device 257 is adjusted, the part between the first position 211 of the first radiator 230 and the ground point can form a slot antenna structure with the first side frame on the other side of the first position 211 and operate 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 of 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 of 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 side frame 220 between the fifth position 213 and the sixth position 214 includes a ground point, and the second side frame 220 is coupled to the floor at the ground point to achieve grounding, so that the third radiator 250 can operate in the line CM mode.

[0382] ​ is ​ the simulation result diagram of the antenna shown. Among them, ​ is ​ the S-parameter simulation result diagram of the antenna shown. ​ is ​ the simulation results of the radiation efficiency and system efficiency of the first antenna unit in the antenna shown. ​ is ​ the simulation results of the radiation efficiency and system efficiency of the second antenna unit in the antenna shown.

[0383] As ​ shown, it shows ​ the S-parameter simulation results of the antenna shown.

[0384] When the second radiator is not set, the first antenna element (S11) can resonate around 1.6 GHz and 1.7 GHz. Among them, the resonance generated around 1.6 GHz can be generated by the line CM mode of the first radiator, and the resonance generated around 1.7 GHz can be generated by the line DM mode of the first radiator (first resonance). When the second radiator is set, the first antenna element (S11) can additionally generate a new resonance (first parasitic resonance) by the second radiator around 2 GHz.

[0385] The second antenna element (S22) can resonate around 1.6 GHz, and this resonance can be generated by the third radiator (second resonance).

[0386] Within the above frequency bands, the isolation (S12) between the first antenna element and the second antenna element is less than -10 dB, and there is good isolation between the two antenna elements.

[0387] As ​ shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator and only resonating by the first radiator, the first antenna element 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 1.5 dB, and the radiation efficiency is improved by about 1.5 dB.

[0388] As ​ shown, when the foldable electronic device is in the folded state, compared with the foldable electronic device without the second radiator and only resonating by the first radiator, the second antenna element resonates by the third radiator, and both the system efficiency and the radiation efficiency are improved. The system efficiency is improved by about 2 dB, and the radiation efficiency is improved by about 2 dB.

[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 from the resonance point (1.6 GHz) of the second resonance generated by the third radiator. For the second antenna, it is not shown in the ​ S parameters shown, but the first parasitic resonance is obvious for improving the system efficiency and radiation efficiency of the second antenna element.

[0390] ​ is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0391] It should be understood that in the above embodiment, only one second element 253 is included in the antenna 200 for illustration. In actual production and design, multiple second elements 253 can also be included, such as ​As shown. Multiple second elements 253 can further disperse the current density on the second radiator 240 (for example, reduce the intensity of a single current peak and make the current more evenly distributed), thereby reducing the losses 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, multiple second elements 253 can further improve the system efficiency and radiation efficiency of the antenna.

[0392] In one embodiment, the second radiator 240 can also be provided with multiple fourth slots, which can reduce the intensity of a single current peak 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 uniform, which can reduce the conductor loss and dielectric loss caused by the second radiator 240 and the conductors and dielectrics 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, by providing a fourth slot between the first coupling point 241 and the second coupling point 242 and coupling and connecting the first element 252, the system efficiency and radiation efficiency of the antenna can be improved. In one embodiment, a first element 252 can be electrically connected between the conductors on both sides of each fourth slot.

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

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

[0395] ​ It is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0396] It should be understood that in the above embodiments, only the structure in which the second radiator 240 forms a wire antenna (for example, both the first end and the second end of the second radiator 240 are open ends, or one of the ends is a grounding end) is taken as an example for illustration. In actual production and design, the second radiator 240 forms a slot antenna structure (for example, both the first end and the second end of the second radiator 240 are coupled to the floor as grounding ends), as ​ shown.

[0397] As ​ shown, the second frame 220 is coupled to the floor at the third position 221 and the fourth position 222.

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

[0399] ​ It is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0400] It should be understood that in the above embodiment, only an example is given where an element is electrically connected between the parasitic stub (for example, the second radiator 240) and the ground plane. In actual production or design, an element can also be electrically connected between the main radiation stub (for example, the first radiator 230) and the ground plane, as ​ shown. The element electrically connected between the main radiation stub and the ground plane can be used to disperse the current density on the main radiation stub (for example, reduce the intensity of a single current strong point and make the current more evenly distributed), thereby reducing the losses caused by the conductors and dielectrics arranged around the main radiation stub, 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 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 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 stub (for example, the first radiator 230) can also be provided with at least one slit, which can 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 can reduce the conductor loss and dielectric loss caused by 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 can increase the radiation aperture and improve the system efficiency and radiation efficiency of the antenna. In one embodiment, an element can be electrically connected between the conductors on both sides of each slit to determine the equivalent capacitance value of the slit.

[0402] It should be understandable that for the specific antenna structure with a slit provided on the first radiator 230, reference can be made to the specific structure with a slit provided on the second radiator 240.

[0403] In one embodiment, the first frame 210 is coupled to the ground plane at the first position 211 and is provided with a second slit at the second position 212.

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

[0405] In one embodiment, element D can be used to adjust the equivalent capacitance between connection point A and connection point B, thereby adjusting the radiation characteristics of the first radiator (e.g., the generated resonant frequency). In one embodiment, the distance between connection point A and connection point B and slot C is less than or equal to 5 mm. Herein, the distance between connection point A and connection point B and slot C can be understood as the minimum distance between connection point A and connection point B and the conductors on both sides of slot C. When element D is electrically connected to connection point A and connection point B through a metal shrapnel, the distance to slot C can be understood as the minimum distance between the center of the part of the metal shrapnel in contact with the connection point and the conductors on both sides of slot C.

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

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

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

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

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

[0411] In one embodiment, the slot 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 slot C is less than or equal to one-third of the length of the first radiator 230 between the second slot and the slot C.

[0412] In one embodiment, the slot 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 slot C is less than or equal to one-seventh of the length of the first radiator 230 between the second slot and the slot C.

[0413] It should be understood that the position where the above slot C is provided, for the region with a relatively large current of the first radiator 230, should be understood as corresponding to the first radiator 230 without the slot (e.g., operating in the quarter-wavelength mode). After the slot C is provided, 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 230 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 provided on the first radiator 230 can refer to the position where the second element 253 is provided on the second radiator 240. The function and effect of the element E on the first radiator 230 can refer to the function and effect of the second element 253 on the second radiator 240. Details are not described herein again.

[0416] ​ The structures related to the first radiator in the illustrated embodiment (e.g., the coupling points A and B provided on the first radiator, the slot C and the element D provided between the coupling points A and B, and / or the coupling point F provided on the first radiator 230 and the element E with one end coupled to the coupling point F) can all be applied to other embodiments of the present application to replace the first radiator structure in other embodiments.

[0417] ​ FIG. is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

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

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

[0420] For the sake of simplicity of discussion, the embodiments of the present application only take the first ends of the first radiator 230, the second radiator 240, and the third radiator 250 as open ends and the second ends as grounded ends coupled to the floor as an example for illustration. In actual production or design, the first ends and the second ends 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 can 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 jointly form a resonance frequency band with the first resonance.

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

[0424] It should be understood that when the above slots partially overlap in the first direction, when an electrical signal is fed into the first feeding point, the second radiator and the third radiator can couple more energy through the electric field at the slots, thereby improving the radiation characteristics of the resonance generated by the second radiator and the third radiator.

[0425] As ​ shown, compared with ​For the antenna 200 shown, at least one second element 253 can also be electrically connected between the second radiator 240 and the floor. The second element 253 can disperse the intensity of a single current strong point on the second radiator 240, making the current distribution more uniform. In one embodiment, the current distribution of the second radiator 240 is relatively more uniform, which can reduce the losses brought by the conductors and dielectrics 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, thereby improving the system efficiency and radiation efficiency of the antenna.

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

[0427] As ​ shown, compared with ​ the antenna 200 shown, at least one second element 253 can also be coupled between the third radiator 250 and the floor. The second element 253 can disperse the current density on the third radiator 250 (for example, reducing the intensity of a single current strong point and making the current distribution more uniform), making the current distribution more uniform. In one embodiment, the current distribution of the third radiator 250 is relatively more uniform, which can reduce the losses brought 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 can also be provided with at least one fourth slot. In one embodiment, a first element 252 can 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 also be coupled between the third radiator 250 and the floor and the second element 253 that can also be coupled between the second radiator 240 and the floor; wherein, for the sake of brevity of the text, the first element and the second element are both represented by the same reference numeral because they respectively correspond to the first element and the second element described above, and it does 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 elements. In one embodiment, the first element 252 coupled to the third radiator 250 can be the above-mentioned capacitive element, and the first element 252 coupled to the second radiator 240 can be the above-mentioned inductive element, and vice versa; the same understanding applies to the second element 253. In​ In the illustrated embodiment, when the foldable electronic device 100 is in the folded state, both the third radiator 250 and the second radiator 240 partially overlap with the first radiator 230 in a first direction, which 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 housings).

[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 housings).

[0432] Referring again to ​ the illustrated embodiment, when the foldable electronic device 100 is in the folded state, in one embodiment, both the second radiator 240 and the first radiator 230 are located on the outermost housing of the electronic device 100 in the first direction.

[0433] In one embodiment, the first radiator 230 is configured to generate a first resonance. The second radiator 240 and its corresponding first element 252 are configured to generate a first parasitic resonance. The third radiator 250 and its corresponding first element 252 are configured 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 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 600 MHz - 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; and / or,

[0436] The frequency difference between the resonant point of the second parasitic resonance and the resonant point of the first resonance may be less than or equal to 350 MHz; or the frequency difference between the resonant point of the second parasitic resonance and the resonant 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 resonant point of the first parasitic resonance and the resonant point of the first resonance may be less than or equal to 400 MHz. Alternatively, in one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 1.5 GHz - 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; and / or,

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

[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 resonant point of the first parasitic resonance and the resonant point of the first resonance may be less than or equal to 600 MHz. Alternatively, in one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 3 GHz - 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; and / or,

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

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

[0444] ​ and ​ is ​ the simulation result diagram of the antenna shown. Among them, ​ is ​ the S-parameter simulation result diagram of the antenna shown. ​ is ​ the simulation results of the radiation efficiency and system efficiency of the antenna shown.

[0445] As shown ​ in the figure, the S-parameter simulation results of the antenna shown ​ are presented.

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

[0447] When the foldable electronic device is in the folded state and the second radiator is not provided, the antenna can resonate by the first radiator and the third radiator, generating 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 the folded state, the antenna can resonate by 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 and the first parasitic resonance generated by the third radiator can jointly generate a resonance band, and the first parasitic resonance and the second parasitic resonance cannot be distinguished.

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

[0450] As shown ​ in the figure, compared with the 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] ​ FIG. is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0452] As shown ​ in the figure, the third position 221, the fourth position 222, as well as the fifth position 213 and the sixth position 214 can be located on the second frame 220. The second radiator 240 and the first radiator 230 at least partially overlap in the first direction, and the third radiator 250 and the first radiator 230 do not completely overlap in the first direction.

[0453] The second radiator 240 includes a first connection position 249, and the third radiator 250 may include 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 in ​ the illustrated antenna 200, the second radiator 240 and the third radiator 250, which are parasitic stubs, are respectively located on different housings and at least partially overlap with the first radiator 230, which is the main radiation stub, in a first direction, and resonate through an indirect coupling method. And in ​ the illustrated antenna 200, the second radiator 240 and the third radiator 250 are respectively located on the same housing. The second radiator 240 resonates through an indirect coupling method. 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 to 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, so as to enhance the indirect coupling between the third radiator 250 and the second radiator 240, make the third radiator 250 more fully excited, and improve 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, as ​ illustrated. In one embodiment, the second border 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, as ​ illustrated. In one embodiment, the second end of the second radiator 240 is opposite to and does not contact the first end of the third radiator 250.

[0458] As ​ illustrated, compared with ​For the antenna 200 shown, at least one second element 253 can also be electrically connected between the third radiator 250 and the ground plane. The second element 253 can disperse the intensity of a single current hot spot on the third radiator 250, making the current distribution more uniform. In one embodiment, the current distribution of the third radiator 250 is relatively more uniform, which can reduce the losses caused by the conductors and dielectrics disposed around the third radiator 250 and 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.

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

[0460] As ​ shown, compared with ​ the antenna 200 shown, at least one second element 253 can also be electrically connected between the second radiator 240 and the ground plane. The second element 253 can disperse the intensity of a single current hot spot on the second radiator 240, making the current distribution more uniform. In one embodiment, the current distribution of the second radiator 240 is relatively more uniform, which can reduce the losses caused by the conductors and dielectrics disposed around the second radiator 240 and 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 third radiator 250, thereby improving the system efficiency and radiation efficiency of the antenna.

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

[0462] Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this 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 foregoing method embodiments, and will not be elaborated herein.

[0464] In several embodiments provided by 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 merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, 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 displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection between devices or units can be in an electrical or other form.

[0465] As mentioned above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A foldable electronic device, characterized in that, Comprising: A first housing, a second housing, and a floor, wherein The first housing includes a first frame, the second housing 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 to the floor or has a first gap at the first position, and the first frame is coupled to the floor or has 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 has a third gap at the fourth position; and An antenna, the antenna comprising: A first radiator and a first feeding circuit. The first radiator is the conductive part of the first frame between the first position and the second position. The first radiator includes a first feeding point, and the first feeding circuit is coupled to the first feeding point; and A second radiator, a first element, and a second element. The second radiator is the conductive part of the second frame between the third position and the fourth position. 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, a second coupling point, and a third coupling point. The second radiator has 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, the second end of the first element is coupled to the second coupling point, the first end of the second element is coupled and connected to the third coupling point, and the second end of the second element is coupled to the floor; A first switch and a second switch. The first switch is used to switch the first element with different electrical parameters, and the second switch is used to switch the second element with different electrical parameters; Wherein, 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; 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 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; Based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap in a first direction. The first radiator is used to generate a first resonance, and the second radiator, the first element, and the second element are used to generate a first parasitic resonance. The first direction is the thickness direction of the foldable electronic device.

2. The foldable electronic device according to claim 1, wherein The length of the second radiator between the third position and the fourth gap is less than the length of the second radiator between the third gap and the fourth gap.

3. The foldable electronic device according to claim 1, wherein The equivalent capacitance value of the first element is less than or equal to a first threshold; When the resonant point frequency of the first parasitic resonance is less than or equal to 1 GHz, the first threshold is 10 pF; When the resonant 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 claim 1, wherein The equivalent inductance value of the second component is less than or equal to 10 nH.

5. The foldable electronic device according to claim 1, wherein The width of the fourth slit is greater than or equal to 0.1 mm and less than or equal to 2 mm.

6. The foldable electronic device according to claim 1, wherein The electrical length of the second radiator is greater than three-eighths of the first wavelength, and the first wavelength is the wavelength corresponding to the first parasitic resonance.

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

8. The foldable electronic device according to claim 1, wherein The length of the second radiator is greater than or equal to 0.8 times the length of the first radiator.

9. The foldable electronic device according to claim 1, wherein The first frame is coupled to the ground at the first position, and the second slit is provided at the second position of the first frame; 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.

10. The foldable electronic device according to claim 1, wherein The first frame is coupled to the ground at the first position, and the second slit is provided at the second position of the first frame; 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 ground at the fifth position, and the fifth slit is provided at the sixth position of the first frame; The antenna includes a third radiator and a second feeding circuit, the third radiator is the conductive part of the first frame between the fifth position and the sixth position, the third radiator includes a second feeding point, and the second feeding circuit is coupled to the second feeding point.

11. The foldable electronic device according to claim 1, wherein The first frame is coupled to the ground at the first position, and the second slit is provided at the second position of the first frame; 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 has a fifth gap at the sixth position. The antenna includes a third radiator and a second feeding circuit. The third radiator is the conductive portion of the first frame between the second position and the sixth position. The third radiator includes a second feeding point, and the second feeding circuit is coupled to the second feeding point.

12. The foldable electronic device according to claim 11, wherein the antenna includes a third element; The third radiator further 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.

13. The foldable electronic device according to claim 1, wherein the foldable electronic device further includes a third housing, a first rotating shaft, and a second rotating shaft; wherein, the first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is respectively rotatably connected to the first housing and the second housing; The second rotating shaft is located between the first housing and the third housing, and the second rotating shaft is respectively rotatably connected to the first housing and the third housing.

14. The foldable electronic device according to claim 1, wherein the foldable electronic device further includes a third housing, a first rotating shaft, and a second rotating shaft; wherein, the first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is respectively rotatably connected to the first housing and the second housing. The second rotating shaft is located between the second housing and the third housing, and the second rotating shaft is respectively rotatably connected to the second housing and the third housing, or the first rotating shaft is located between the first housing and the third housing, and the first rotating shaft is respectively rotatably connected to the first housing and the third housing. The second rotating shaft is located between the third housing and the second housing, and the second rotating shaft is respectively rotatably connected to the third housing and the second housing.

15. The foldable electronic device according to claim 13 or 14, wherein the third housing includes a third frame, and at least a part of the third frame is spaced apart from the floor; The third frame includes a fifth position and a sixth position. The third frame is coupled to the floor or has a fifth gap at the fifth position, and the third frame is coupled to the floor or has a sixth gap at the sixth position. The antenna includes a third radiator and a second feeding circuit. The third radiator is the conductive part of the third side frame between the fifth position and the sixth position. The third radiator includes a 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 in a first direction.

16. The foldable electronic device according to claim 15, wherein The first side frame is provided with the first slit at the first position, and the first side frame is provided with the second slit at the second position. The third side frame is coupled to the ground at the fifth position, and the third side frame is provided with a sixth slit at the sixth position. The first side frame further includes a first grounding point located between the first position and the second position, and the first side frame is coupled to the ground at the first grounding point.

17. The foldable electronic device according to claim 16, wherein The antenna includes a third element. The first radiator further includes a fourth coupling point. The first feeding point is located between the first grounding point and the second position, and 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 ground.

18. The foldable electronic device according to claim 17, wherein The first side frame is provided with the first slit at the first position, and the first side frame is provided with the second slit at the second position. The third side frame is provided with a fifth slit at the fifth position, and the third side frame is provided with a sixth slit at the sixth position. The first side frame further includes a first grounding point located between the first position and the second position, and the first side frame is coupled to the ground at the first grounding point. The third side frame further includes a second grounding point located between the fifth position and the sixth position, and the third side frame is coupled to the ground at the grounding point.

19. The foldable electronic device according to claim 18, wherein 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 ground, 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 ground.

20. The foldable electronic device according to claim 15, 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 in the first direction.

21. The foldable electronic device according to claim 15, characterized in that, Based on the foldable electronic device being in a folded state, the first radiator and the third radiator do not overlap at all in the first direction.

22. The foldable electronic device according to claim 15, wherein the third radiator is used to generate a second resonance, 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.

23. The foldable electronic device according to claim 15, wherein the third radiator is used to generate a second resonance, and the resonance frequency band of the first resonance is the same as or adjacent to the resonance frequency band of the second resonance.

24. The foldable electronic device according to claim 1, wherein 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 slot 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 a first direction, the second radiator includes a seventh coupling point, the third radiator includes an eighth coupling point, a first end of the fourth element is coupled to the seventh coupling point, and a second end of the fourth element is coupled to the eighth coupling point.

25. The foldable electronic device according to claim 1, wherein the antenna includes a fourth element; the first radiator further includes a fifth coupling point and a sixth coupling point, the first radiator is provided with a sixth slot between the fifth coupling point and the sixth coupling point, a first end of the fourth element is coupled to the fifth coupling point, and a second end of the fourth element is coupled to the sixth coupling point.

Images