Foldable electronic device

Abstract

The embodiment of the present application provides a foldable electronic device comprising an antenna. The antenna uses a first frame and a second frame arranged in the foldable electronic device as a radiator. Part of the first frame acts as a feed branch, and part of the second frame acts as a parasitic branch. By providing a slit in the parasitic branch, the radiation aperture of the parasitic branch 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 more particularly to a foldable electronic device. Background Technology

[0002] With the rapid development of wireless communication technology, second-generation (2G) mobile communication systems primarily supported voice calls. Electronic devices were simply tools for sending and receiving text messages and communicating via voice. Wireless internet access was extremely slow because data transmission relied on voice channels. Nowadays, in addition to making calls, sending text messages, and taking photos, electronic devices can be used for online music streaming, watching online movies, and real-time video, covering a wide range of applications in people's lives, including communication, entertainment, and e-commerce. Many of these applications require wireless networks for uploading and downloading data; therefore, high-speed data transmission has become extremely important.

[0003] As the demand for high-speed data transmission increases, the trend in industrial design (ID) of electronic devices is towards larger screen ratios and multiple cameras. This has resulted in a significant reduction in antenna clearance and increasingly limited layout space. However, this contradicts the inherent nature of antennas as open systems, thus restricting antenna performance. Summary of the Invention

[0004] This application provides a foldable electronic device, including an antenna. The antenna utilizes a first frame and a second frame, which are foldably configured in the electronic device, as radiators. A portion of the first frame serves as a radiating stub (a stub that feeds a signal into the feed point), and a portion of the second frame serves as a parasitic stub (a stub that couples a signal through coupling with the main radiating stub). By providing gaps in the parasitic stubs, the antenna's radiating aperture is increased to improve its radiation characteristics.

[0005] In a first 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, the first frame being at least partially spaced from the floor, and the second frame being at least partially spaced from the floor; the first frame includes a first position and a second position, the first frame being coupled to the floor or having a first gap at the first position, and the first frame being coupled to the floor or having a second gap at the second position; the second frame includes a third position and a fourth position, the second frame being coupled to the floor at the third position, and the second frame having a third gap at the fourth position; a first pivot, the first pivot being located between the first housing and the second housing, and the first pivot being rotatably connected to both the first housing and the second housing; and an antenna, the antenna comprising: a first radiator and a first feed circuit, the first radiator being the first frame located between the first housing and the second housing; and an antenna comprising: a first radiator and a first feed circuit, the first radiator being the first frame located between the first housing and the second housing; and an antenna comprising: a first radiator and a first feed circuit, the first radiator being the first frame located between the first housing and the second housing; the first frame being ... The conductive portion between the first position and the second position, the first radiator including a first feed point, the first feed circuit coupled to the first feed point, the second radiator and the first element, the second radiator being the conductive portion of the second frame between the third position and the fourth position, the length of the second radiator being less than or equal to three times the length of the first radiator; wherein, the second radiator including a first coupling point and a second coupling point, the second radiator having a fourth gap between the first coupling point and the second coupling point, the first end of the first element coupled to the first coupling point, the second end of the first element coupled to the second coupling point; wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator being used to generate a first resonance, the second radiator and the first element being used to generate a first parasitic resonance, the first direction being the thickness direction of the foldable electronic device.

[0006] According to an embodiment of this application, a fourth gap is provided between the first coupling point and the second coupling point, and a first element (which can be used to determine the equivalent capacitance value of the fourth gap) is coupled to this gap, which can increase the radiation aperture of the second radiator. Because the radiation aperture of the second radiator is increased, the intensity of a single current strong point of the second radiator can be reduced, making the current distribution more uniform. This reduces conductor loss and dielectric loss caused by the conductors and dielectrics surrounding the second radiator, thereby improving the system efficiency and radiation efficiency of the antenna.

[0007] In conjunction 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; the second radiator, the first element, and the second element are used to generate the first parasitic resonance.

[0008] According to the embodiments of this application, in the technical solution provided in this application, the second radiator is coupled to the ground through a component at the third coupling point, which can increase the radiation aperture of the second radiator. Because the radiation aperture of the second radiator is increased, the intensity of a single current strong point of the second radiator can be reduced, making the current distribution more uniform, reducing conductor loss and dielectric loss caused by the conductors and dielectrics surrounding the second radiator, thereby improving the system efficiency and radiation efficiency of the antenna.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the length of the second radiator between the third position and the fourth slit is less than the length of the second radiator between the third slit and the fourth slit.

[0010] According to an embodiment of this application, since the second frame is coupled to the ground 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 gap is located in the area with stronger current, the effect of reducing the intensity of a single strong current point of the second radiator is more significant, and the current distribution of the second radiator is relatively more uniform. Because the current distribution of the second radiator is relatively more uniform, the conductor loss and dielectric loss caused by the conductors and dielectrics surrounding the second radiator are reduced. In one embodiment, the more uniform current distribution of the second radiator leads to a more significant increase in the radiating aperture of the second radiator, resulting in a better improvement in the system efficiency and radiation efficiency of the antenna.

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

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

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

[0014] The third coupling point can be located between the third position and the first coupling point, and 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 first element and the second element are similar to being in series.

[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 using the first element and the second element, the radiation aperture of the second radiator can be 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 0 mm, the third coupling point coincides with the second coupling point. In one embodiment, the second end of the first element and the first end of the second element can be coupled to the second coupling point (third coupling point) through the same connector.

[0017] The third coupling point can be located between the fourth position and the second coupling point. The second element can be a capacitor, which can increase the equivalent capacitance between the first and third coupling points. It should be understood that when the third coupling point is located between the fourth position and the second coupling point, the first and second elements are similar to being connected in parallel. In one embodiment, when the equivalent capacitance of the first element is 2pF, the loss is high. However, the second element can be used to reduce the loss while ensuring the same effect (e.g., the same radiating aperture) (the equivalent capacitance of the first element is 1pF, the equivalent capacitance of the second element is 1pF, and the equivalent capacitance between the first and third coupling points is 2pF), 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 using the first element and the second element, the radiation aperture of the second radiator can be adjusted simultaneously to achieve parasitic resonance in the desired frequency band.

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

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

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

[0022] In conjunction 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 frequency of the first parasitic resonance is less than or equal to 1 GHz, the first threshold is 10 pF; when the resonant frequency of the first parasitic resonance is greater than 1 GHz, the first threshold is 2 pF.

[0023] In conjunction 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, where the first wavelength is the wavelength corresponding to the first parasitic resonance.

[0024] According to an embodiment of this 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 gap, 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 reversal occurs), and the electric field between the second radiator and the ground does not reverse. The electrical length of the second radiator increases from one-quarter of the first wavelength to more than three-eighths of the first wavelength, but it still operates in a quarter-wavelength mode. In this case, the current density on the second radiator 240 is dispersed, and the current density between the second radiator and the ground is reduced, thereby reducing the losses caused by the radiator and the conductors and dielectrics placed around the radiator, and thus improving the radiation characteristics of the antenna.

[0025] In conjunction 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 conjunction 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 conjunction with the first aspect, in some implementations of the first aspect, 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 200MHz.

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

[0029] According to an embodiment of this application, when one of the first and second ends 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 is operating in a quarter-mode. Specifically, the grounded end current of the first radiator is stronger, and the open end electric field of the first radiator is stronger.

[0030] In conjunction 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 at the first position and the fifth position, and the first frame is provided with a second gap and a fifth gap at the second position and the sixth position, respectively; the antenna includes a third radiator and a second feeding circuit, the third radiator is the conductive portion 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.

[0031] In conjunction 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 at the first position and the fifth position, and the first frame is provided with a second gap and a fifth gap at the second position and the sixth position, respectively; the antenna includes a third radiator and a second feeding circuit, the third radiator is a conductive 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.

[0032] According to embodiments of this application, a first radiator and a first feeding circuit can form a first antenna element. A third radiator and a second feeding circuit can form a second antenna element. The second radiator can simultaneously serve as a parasitic branch for both the first and second antenna elements, used to improve the radiation characteristics of both antenna elements. Furthermore, since the first and second antenna elements can reuse the second radiator, the overall antenna structure can be miniaturized while simultaneously improving the radiation characteristics of both antenna elements.

[0033] In conjunction with the first aspect, in some implementations of the first aspect, the antenna includes a third element; the third radiator further includes a fourth coupling point, the second feed 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 conjunction with the first aspect, in some implementations of the first aspect, the foldable electronic device further includes a third housing, the third housing including a third frame, the third frame being at least partially spaced from the floor, wherein the third frame includes a fifth position and a sixth position, the third frame being coupled to the floor or having a fifth gap at the fifth position, and the third frame being coupled to the floor or having a sixth gap at the sixth position; the foldable electronic device further includes a second pivot, the second pivot being located between the first housing and the third housing, and the second pivot being rotatably connected to both the first housing and the third housing; the antenna includes a third radiator and a second feeding circuit, the third radiator being a conductive portion of the first frame between the fifth position and the sixth position, the third radiator including a second feeding point, and the second feeding circuit being coupled to the second feeding point; based on the foldable electronic device being in a folded state, the third radiator and the second radiator at least partially overlap along a first direction.

[0035] In conjunction with the first aspect, in some implementations of the first aspect, the first frame has a first gap at the first position and a second gap at the second position; the third frame is coupled to the floor at the fifth position and has a sixth gap 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 floor at the first grounding point.

[0036] In conjunction with the first aspect, in some implementations of the first aspect, the antenna includes a third element; the first radiator further includes a fourth coupling point, the first feed point being located between the first ground point and the second position, the fourth coupling point being located between the first position and the first ground point, a first end of the third element being coupled to the fourth coupling point, and a second end of the third element being coupled to the ground plane.

[0037] In conjunction with the first aspect, in some implementations of the first aspect, the first frame has a first gap at the first position and a second gap at the second position; the third frame has a fifth gap at the fifth position and a sixth gap 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 floor 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 floor at the grounding point.

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

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

[0040] In conjunction with the first aspect, in some implementations of the first aspect, based on the foldable electronic device being in a folded state, the first radiator and the third radiator do not overlap at all along the first direction.

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

[0042] In conjunction with the first aspect, in some implementations of the first aspect, the third radiator is used to generate a second resonance, wherein the resonant frequency band of the first resonance is the same as or close to the resonant frequency band of the second resonance.

[0043] In conjunction with the first aspect, in some implementations of the first aspect, the foldable electronic device further includes a third housing, the third housing including a third frame, the third frame being at least partially spaced from the floor, wherein the third frame includes a fifth position and a sixth position, the third frame being coupled to the floor at the fifth position, and the third frame having a fifth gap at the sixth position; the foldable electronic device further includes a second pivot, the second pivot being located between the second housing and the third housing, and the second pivot being rotatably connected to both the first housing and the third housing; the antenna includes a third radiator, the third radiator being a conductive portion 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 this application, the second and third radiators, which are parasitic branches, are located on different shells and at least partially overlap with the first radiator, which is the main radiating branch, in a first direction, thereby generating resonance through indirect coupling.

[0045] In conjunction with the first aspect, in some 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 has a sixth gap 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 conjunction with the first aspect, in some 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 ground at the fifth position, and the second frame has a sixth gap at the sixth position; the antenna includes a third radiator and a fourth element, the third radiator is the conductive portion 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, the first end of the fourth element is coupled to the seventh coupling point, and the second end of the fourth element is coupled to the eighth coupling point.

[0047] According to an embodiment of this application, the second radiator and the third radiator are located on the same housing, and the second radiator resonates through indirect coupling. The third radiator is coupled to the seventh coupling point of the second radiator through an eighth coupling point, and also indirectly coupled to the second radiator, thereby generating 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, 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, a fourth position, and a fifth position, the fifth position being located between the third position and the fourth position, the second frame being coupled to the floor at the third position and the fourth position, and the second frame having a third gap at the fifth position; a first pivot, the first pivot being located between the first housing and the second housing, and the first pivot being rotatably connected to the first housing and the second housing respectively; and an antenna, the antenna comprising: a first radiator and a first feed circuit, the first radiator being a conductive portion of the first frame between the first position and the second position, the first radiator including a first feed point, the first feed circuit being coupled to the first feed point, a second radiator and a first element and a second element, the second radiator being a conductive portion of the second frame between the first position and the second position, the first radiator including a first feed point, the first feed circuit being coupled to the first feed point, a second radiator and a first element and a second element, the second radiator being a conductive portion of the second frame between the first position and the second position; the first radiator including a first radiator and a first element and a second element, the second radiator being a conductive portion of the second frame between the first position and the second position; the first radiator including a first feed point, the first feed circuit being coupled to the first feed point; the second radiator including ... The conductive portion between the third position and the fourth position, wherein 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 being located between the third position and the fifth position, the third coupling point and the fourth coupling point being located between the fourth position and the fifth position, the second radiator having a fourth gap between the first coupling point and the second coupling point, the second radiator having a fifth gap between the third coupling point and the fourth coupling point, and the first end of the first element being connected to the first... A coupling point is formed, wherein the second end of the first element is coupled to the second coupling point, the first end of the second element is coupled to the third coupling point, and the second end of the second element is coupled to the fourth coupling point; wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator and the first element, and the second element are used to generate a first parasitic resonance, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200MHz, and the first direction is the thickness direction of the foldable electronic device.

[0049] Thirdly, 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, 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 being coupled to the floor or having a first gap at the first position, and the first frame being coupled to the floor or having a second gap at the second position; the second frame includes a third position, a fourth position, and a fifth position, the fifth position being located between the third position and the fourth position, and the second frame being spaced from the floor at the third position, fourth position, and fifth position. The third and fourth positions are respectively provided with a third gap and a fourth gap, and the second frame is coupled to the floor at the fifth position; a first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is rotatably connected to the first housing and the second housing respectively; and an antenna, the antenna including: a first radiator and a first feed circuit, the first radiator being the conductive portion of the first frame between the first position and the second position, the first radiator including a first feed point, the first feed circuit being coupled to the first feed point, a second radiator and a first element and a second element, the second radiator being the conductive portion of the second frame between the third position and the floor; the second radiator being the conductive portion of the first frame between the third position and the floor respectively ... The conductive portion between the fourth positions, wherein 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, as well as a third coupling point and a fourth coupling point, the first coupling point and the second coupling point being located between the third position and the fifth position, the third coupling point and the fourth coupling point being located between the fourth position and the fifth position, the second radiator having a fifth gap between the first coupling point and the second coupling point, the second radiator having a sixth gap between the third coupling point and the fourth coupling point, the first element's... One 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 along a first direction, the first radiator is used to generate a first resonance, the second radiator and the first element, and the second element are used to generate a first parasitic resonance, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200MHz, and the first direction is the thickness direction of the foldable electronic device. Attached Figure Description

[0050] Figure 1This is a schematic structural diagram of the foldable electronic device 100 provided in the embodiments of this application.

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

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

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

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

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

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

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

[0058] Figure 9 This is a diagram showing the structure of the slot differential mode provided in this application and the corresponding distribution of current, electric field, and magnetic current.

[0059] Figure 10 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0060] Figure 11 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0061] Figure 12 This is a schematic diagram of the distributed device provided in the embodiments of this application.

[0062] Figure 13 This is a schematic diagram of another foldable electronic device 100 provided in the embodiments of this application.

[0063] Figure 14 yes Figure 11 and Figure 13 The simulation results of the S-parameters of the antenna shown are displayed.

[0064] Figure 15 yes Figure 11 and Figure 13The simulation results show the radiation efficiency of the antenna and the system efficiency.

[0065] Figure 16 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0066] Figure 17 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0067] Figure 18 yes Figure 17 The simulation results of the S-parameters of the antenna shown are displayed.

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

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

[0070] Figure 21 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0071] Figure 22 yes Figure 21 The simulation results of the S-parameters of the antenna shown are displayed.

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

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

[0074] Figure 25 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0075] Figure 26 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0076] Figure 27 yes Figure 25 The simulation results of the S-parameters of the antenna shown are displayed.

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

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

[0079] Figure 30 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0080] Figure 31 yes Figure 30 The simulation results of the S-parameters of the antenna shown are displayed.

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

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

[0083] Figure 34 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0084] Figure 35 yes Figure 34 The simulation results of the S-parameters of the antenna shown are displayed.

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

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

[0087] Figure 38 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0088] Figure 39 yes Figure 38 The simulation results of the S-parameters of the antenna shown are displayed.

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

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

[0091] Figure 42 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0092] Figure 43 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0093] Figure 44 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0094] Figure 45 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0095] Figure 46 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0096] Figure 47 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0097] Figure 48 yes Figure 47 The simulation results of the S-parameters of the antenna shown are displayed.

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

[0099] Figure 50 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0100] Figure 51 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0101] Figure 52 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application. Detailed Implementation

[0102] The following explains the terminology that may appear in the embodiments of this application.

[0103] It should be understood that the term "and / or" used in this document is merely a description of the same field in the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0104] The phrase "within the range" used in this application, unless otherwise specified, includes both endpoints of the range by default. For example, in the range of 1 to 5, it includes the values ​​1 and 5.

[0105] Coupling: This can be understood as direct coupling and / or indirect coupling. "Coupled connection" or "coupled connection" can be understood as direct coupling and / or indirect coupling. Direct coupling can also be called "electrical connection," which means that components are physically in contact and electrically conductive; it can also be understood as the form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Indirect coupling" can be understood as two conductors conducting electricity through a gap / non-contact method. In one embodiment, indirect coupling can also be called capacitive coupling, for example, using the coupling between the gaps between two conductive parts to form an equivalent capacitance to achieve signal transmission.

[0106] Components / devices: including at least one of lumped components / devices and distributed components / devices.

[0107] Lumped components / devices: This refers to all components whose size is much smaller than the wavelength relative to the circuit's operating frequency. For signals, the characteristics of these components remain constant regardless of frequency. Lumped components / devices can include lumped capacitors, lumped inductors, etc.

[0108] Distributed elements / devices: Unlike lumped elements, when a signal passes through an element, the characteristics of each point within the element will vary depending on the signal. Therefore, the element as a whole cannot be considered a single entity with fixed characteristics, and should be called a distributed element. Distributed elements / devices can include distributed capacitance, distributed inductance, etc.

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

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

[0111] Radiator: In an antenna, this is the device used to receive / transmit electromagnetic wave radiation. In some cases, the term "antenna" is narrowly defined as a radiator, which converts guided wave energy from the 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 via a feed line, where it is converted into electromagnetic wave energy of a specific polarization and radiated in the desired direction. The receiving radiator converts electromagnetic wave energy of a specific polarization from a specific direction in space back into modulated high-frequency current energy, which is then transmitted to the receiver input via a feed line.

[0112] Radiators may include conductors with specific shapes and sizes, such as wires or sheets, and this application does not limit the specific shape. In one embodiment, a wire radiator may be simply referred to as a wire antenna. In one embodiment, a wire radiator may be implemented by a conductive frame, and may also be called a frame antenna. In one embodiment, a wire radiator may be implemented by a support conductor, and may also be called a support antenna. In one embodiment, the wire diameter (e.g., including thickness and width) of the wire radiator, or the radiator of the wire antenna, is much smaller than the wavelength (e.g., the wavelength of the medium) (e.g., less than 1 / 16 of the wavelength), and the length may be comparable to the wavelength (e.g., the wavelength of the medium) (e.g., a length of approximately 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, and inverted F antennas (also known as IFA, Inverted F Antenna). For example, in a dipole antenna, each dipole antenna typically includes two radiating stubs, each fed from the feed end of the radiating stub by a feed section. For example, an inverted-FAntenna (IFA) can be considered as a monopole antenna with an added ground path. An IFA antenna has one feed point and one ground point, and is called an inverted-F antenna because its side view is inverted-F shaped. 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 a PIFA). In one embodiment, the sheet radiator may be implemented using a planar conductor (e.g., a conductive sheet or conductive coating). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet. In one embodiment, the sheet radiator may include a conductive coating, such as silver paste. The shape of the sheet radiator includes circular, rectangular, and annular shapes, and this 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, wherein the dielectric substrate is disposed between the radiator and the ground plane.

[0113] Radiators may also include slots or gaps formed on a conductor, for example, closed or semi-closed slots or gaps formed on a grounded conductor surface. In one embodiment, a slotted or slit radiator may be simply referred to as a slot antenna or a gap antenna. In one embodiment, the radial dimension (e.g., including width) of the slot or gap of the slot antenna / gap antenna is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), while the length dimension may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., a length of approximately 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 gap may be simply referred to as a closed slot antenna. In one embodiment, a radiator with a semi-closed slot or gap (e.g., an opening added to a closed slot or gap) may be simply referred to as an open slot antenna. In some embodiments, the gap shape is elongated. In some embodiments, the length of the gap is approximately half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the gap is approximately an integer multiple of a wavelength (e.g., one dielectric wavelength). In some embodiments, the slot can be fed by transmission lines connected across one or both sides, 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 gap antenna can be implemented by a conductive frame grounded at both ends, also known as a frame antenna; in this embodiment, the slot antenna or gap antenna can be viewed as including a linear radiator, the linear radiator being spaced apart from the ground and grounded at both ends, thereby forming a closed or semi-closed slot or gap. In one embodiment, the radiator of the slot antenna or gap antenna can be implemented by a support conductor grounded at both ends, also known as a support antenna.

[0114] A feed circuit / feed structure is the combination of all components of an antenna used for receiving and transmitting radio frequency (RF) waves. In the case of a receiving antenna, the feed circuit can be considered the antenna section from the first amplifier to the front-end transmitter. In a transmitting antenna, the feed circuit can be seen as the section after the last power amplifier. In some cases, the term "feed circuit" is narrowly interpreted as the RF chip, or the transmission path including the RF chip to the feed point on the radiator or transmission line. The feed circuit has the function of converting radio waves into electrical signals and sending them to the receiver components. Generally, it is considered part of the antenna used to convert radio waves into electrical signals and vice versa. Maximum power transfer capability and efficiency should be considered when designing an antenna. For this purpose, 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 achieved by considering frequency requirements and antenna design parameters such as gain, directivity, and radiation efficiency.

[0115] End / Point: The term "end / point" in the context of the antenna radiator's first end / second end / feed end / ground end / feed point / ground point / coupling point should not be narrowly interpreted as necessarily being a point or end physically disconnected from other radiators. It can also be considered as a point or segment on a continuous radiator. In one embodiment, "end / point" can include a connection / coupling region on the antenna radiator that couples to other conductive structures. For example, a feed end / feed point can be a coupling region on the antenna radiator that couples to a feed structure or feed circuit (e.g., a region facing a part of the feed circuit). Similarly, a ground end / ground point can be a connection / coupling region on the antenna radiator that couples to a ground structure or ground circuit.

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

[0117] In some embodiments, the understanding of "closed end" can also be from the perspective of current distribution. A closed end or ground end can be understood as a point of high current or low electric field on a radiator. In one embodiment, coupling electronic devices (e.g., capacitors, inductors, etc.) through a closed end can maintain the current distribution characteristics of the point of high current / low electric field. In one embodiment, opening a slit at or near the closed end (e.g., filling the slit with insulating material) can maintain the current distribution characteristics of the point of high current / low electric field.

[0118] In some embodiments, the understanding of "open terminal" can also be from the perspective of current distribution. An open terminal or a floating terminal can be understood as a point with a small current or a point with a large electric field on the radiator. In one embodiment, coupling electronic devices (e.g., capacitors, inductors, etc.) through an open terminal can maintain the current distribution characteristics of the point with a small current or a large electric field.

[0119] It should be understood that when an electronic device (e.g., capacitor, inductor, etc.) is coupled at the radiator end of a gap (which, from the perspective of the radiator's structure, is similar to the radiator at the opening of an open or floating end), the radiator end can be a point with a large current / small electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0120] Resonance / 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's 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. The return loss characteristic of the center frequency can be less than -20dB. It should be understood that, unless otherwise specified, in the phrase "generating the first resonance" mentioned in this application, the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or the lowest frequency resonance generated by the antenna / radiator.

[0121] Resonant band / communication band / operating band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting the B40 band operates within the frequency range of 2300MHz to 2400MHz, or in other words, the antenna's operating band includes the B40 band. The frequency range that meets the specifications can be considered the antenna's operating band.

[0122] Electrical length: can be the ratio of physical length (i.e., mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. Electrical length can satisfy the following formula:

[0123] ;

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

[0125] Wavelength: or operating wavelength, can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming 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 this frequency. Not limited to the center frequency, "operating wavelength" can also refer to the wavelength corresponding to the resonant frequency or a non-center frequency of the operating frequency band.

[0126] It should be understood that the wavelength of a radiation 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 radiation signal (MHz), and the speed of light can be taken as 3 × 10⁸ m / s. The wavelength of a radiation signal in a medium can be calculated as follows: Medium wavelength = (speed of light / ... ) / frequency, where, The wavelength is the relative permittivity of the medium. In the embodiments of this application, the wavelength typically 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 the center frequency of the B1 uplink band (resonant frequency of 1920 MHz to 1980 MHz) is 1955 MHz, the wavelength can be the medium wavelength calculated using this frequency. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to the resonant frequency or a non-center frequency of the operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of this application can be simply calculated using the relative permittivity of the medium filling one or more sides of the radiator.

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

[0128] Antenna radiation efficiency refers to the ratio of the power radiated into space by an antenna (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. The active power input to the antenna equals the antenna's input power minus the power loss. Power loss primarily includes return loss power, ohmic loss power of the metal, and / or dielectric loss power. Radiation efficiency measures an antenna's radiation capability; metal loss and dielectric loss are both factors affecting radiation efficiency.

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

[0130] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port after passing through the antenna circuit to the transmit power at the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the higher the antenna's radiation efficiency. Conversely, the larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the antenna's radiation efficiency.

[0131] Antenna return loss can be represented by the S11 parameter, which is one of the S-parameters. S11 represents the reflection coefficient, and this parameter characterizes the antenna's transmission efficiency. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the less energy the antenna reflects back, which means more energy actually enters the antenna, and the higher the antenna's system efficiency. Conversely, the larger the S11 parameter, the greater the antenna return loss, and the lower the antenna's system efficiency.

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

[0133] It should be understood that, as mentioned in the embodiments of this application, the resonant frequency bands (e.g., S11 < -4dB) of the first and second resonances being the same (also referred to as being at the same frequency) can be understood as any of the following:

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

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

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

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

[0138] Ground (GND): Generally refers to at least a portion of any grounding layer, ground plane, or grounding metal layer within an electronic device (such as a mobile phone), or at least a portion of any combination of the aforementioned grounding layers, ground planes, or grounding components. "Ground" can be used for grounding components within an electronic device. In one embodiment, "ground" can be the grounding layer of a circuit board in an electronic device, or a grounding metal layer formed by a ground plane formed within the frame of the electronic device or a metal film formed beneath the screen. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12-14-layer board with 8, 10, 12, 13, or 14 layers of conductive material, or components separated and electrically insulated by dielectric or insulating layers such as fiberglass or polymers. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer, and a trace layer, with the trace layer and grounding layer electrically connected via vias. In one embodiment, components such as displays, touchscreens, input buttons, transmitters, processors, memory, batteries, charging circuits, and system-on-chip (SoC) architectures can be mounted on or connected to a circuit board; or electrically connected to trace layers and / or ground layers in the circuit board. For example, a radio frequency source is disposed on a trace layer.

[0139] Any of the aforementioned grounding layers, ground planes, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material may be any of the following: 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, graphite-impregnated cloth, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. Those skilled in the art will understand that grounding layers / ground planes / grounding metal layers may also be made of other conductive materials.

[0140] Grounding: refers to coupling with the aforementioned ground / floor in any way. In one embodiment, grounding can be achieved through physical grounding, such as through a structural component of the mid-frame to achieve a physical ground at a specific location on the frame (or, physical ground). In another embodiment, grounding can be achieved through device grounding, such as through devices like capacitors / inductors / resistors connected in series or parallel (or, device ground).

[0141] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings.

[0142] Figure 1This is a schematic diagram of the structure of a foldable electronic device 100 provided in an embodiment of this application. The foldable electronic device 100 can be a mobile phone, tablet computer, e-reader, laptop computer, wearable device such as a watch, or other electronic device with folding function. Figure 1 The illustrated embodiment uses a foldable phone as an example.

[0143] refer to Figure 1 The foldable electronic device 100 may include a flexible display screen 110, a first frame 121, a first cover 122, a second frame 123, a second cover 124, and a hinge 125. In some embodiments, the first frame 121, the first cover 122, the second frame 123, and the second cover 124 may form a first housing 126 and a second housing 127 supporting 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 in the center can schematically represent the flexible display screen 110. The flexible display screen 110 can be highly flexible and bendable, providing users with a new interaction method based on its bendability. The display panel of the flexible display screen 110 can be any of the following: liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light-emitting diode (AMOLED), flex light-emitting diode (FLED), quantum dot light-emitting diode (QLED), etc. This application embodiment does not limit this choice.

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

[0146] The first frame 121 may surround the outer periphery of the first cover 122, and at least a portion of the first frame 121 may also surround the outer periphery of the first display portion 111. The first display portion 111 may be arranged parallel to and spaced apart from the first cover 122, and the first display portion 111 and the first cover 122 may be located on opposite sides of the first frame 121. The space between the first display portion 111 and the first cover 122 may be used to house components of the foldable electronic device 100, such as antennas, circuit board assemblies, etc.

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

[0148] In one embodiment provided in this application, the cover and the frame can be two parts of the housing of the foldable electronic device 100. The cover and the frame can be connected, and the connection method does not have to be an assembly method such as snap-fit, adhesive, welding, riveting, or clearance fit. The connection between the cover and the frame is usually difficult to separate. In another embodiment provided in this application, the cover and the frame can be two different components. By assembling the cover 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 for transmitting / receiving radio frequency signals. This portion of the frame serving as the radiator can have gaps between it and the rest of the cover, thereby ensuring a good radiation environment for the antenna radiator. In one embodiment, the cover can have a slit at the portion of the frame serving as the radiator to facilitate antenna radiation.

[0150] The antenna of the electronic device 100 can also be disposed within the frame. When the frame of the electronic device 100 is made of a non-conductive material, the antenna radiator can be located inside the electronic device 100 and positioned along the frame. For example, the antenna radiator can be positioned close to the frame to minimize the volume occupied by the antenna radiator and to be closer to the outside of the electronic device 100, thereby achieving better signal transmission performance. It should be noted that "positioning the antenna radiator close to the frame" means that the antenna radiator can be placed flush against the frame or close to the frame; for example, there can be a small gap between the antenna radiator and the frame.

[0151] The antenna of electronic device 100 can also be housed within the casing, such as a bracket antenna, millimeter-wave antenna, etc. Figure 1(Not shown in the image). The clearance of the antenna disposed within the housing can be obtained by a slit / opening on any of the cover, and / or frame, and / or display screen, or by a non-conductive gap / aperture formed between any of them. The clearance setting of the antenna can ensure the radiation performance of the antenna. It should be understood that the clearance of the antenna can be a non-conductive area formed by any conductive components within the electronic device 100, through which the antenna radiates signals to the external space. In one embodiment, the antenna can be a flexible printed circuit (FPC) based antenna, a laser-direct-structuring (LDS) based antenna, or a microstrip disk antenna (MDA), etc. In one embodiment, the antenna can also be a transparent structure embedded inside the display screen of the electronic device 100, making the antenna a transparent antenna unit embedded inside the display screen of the electronic device 100.

[0152] The foldable electronic device 100 may also include a printed circuit board (PCB) (not shown). The PCB is disposed within the cavity formed by the cover. The PCB may be made of a flame-retardant material (FR-4) dielectric substrate, a Rogers dielectric substrate, a hybrid dielectric substrate of Rogers and FR-4, etc. Here, FR-4 is a designation for a flame-retardant material grade, and Rogers dielectric substrate is a high-frequency board. Components, such as radio frequency chips, are carried on the PCB. In one embodiment, a metal layer may be disposed on the PCB. This metal layer can be used to ground components carried on the PCB, or to ground other components, such as bracket antennas, frame antennas, etc. This metal layer may be referred to as a ground plane, grounding plane, or grounding layer. In one embodiment, the metal layer may be formed by etching metal onto the surface of any dielectric substrate in the PCB. In one embodiment, the grounding metal layer may be disposed on the side of the PCB near the flexible display screen 110. In one embodiment, the edge of the PCB may be considered as the edge of its grounding layer. The electronic device 100 may also have other ground planes / grounding planes, as previously described, and will not be repeated here.

[0153] A hinge 125 can connect the first housing 126 and the second housing 127. Under the action of the hinge 125, the first housing 126 and the second housing 127 can move closer to or further away from each other. Correspondingly, the first display portion 111 and the second display portion 112 of the flexible display screen 110 can move closer to or further away from each other, allowing the flexible display screen 110 to be folded or unfolded.

[0154] In one example, the pivot 125 may include a main shaft, a first connecting component, and a second connecting component. The first connecting component may be fixed to the first cover 122, and the second connecting component may be fixed to the second cover 124. The first and second connecting components are rotatable relative to the main shaft. Through the mutual movement of the first and second connecting components, the mutual 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 its unfolded state. In the unfolded state, the angle between the first housing 126 and the second housing 127 can be approximately 180°. The flexible display screen 110 can be positioned as follows: Figure 1 The unfolded state shown.

[0156] Figure 2 This illustrates one possible folded state of the foldable electronic device 100. Figure 2 The outward folding state of the foldable electronic device 100 is shown (the outward folding state can be simply referred to as the outward folding state). Figure 2 The outward folding state shown can be, for example, a left-right outward folding state or a top-bottom outward folding state. (The following is in conjunction with...) Figure 1 and Figure 2 This describes one possible folding state of the foldable electronic device 100.

[0157] In this embodiment, the foldable electronic device 100 being in a folded state means that the foldable electronic device 100 is currently bent, and the degree of bending of the foldable electronic device 100 reaches its maximum. At this time, the first cover 122 and the second cover 124 can be arranged approximately parallel, spaced apart from each other, and facing each other, and the distance between the first cover 122 and the second cover 124 is minimal. At least a portion of the first housing 126 and the second housing 127 are housed within the space enclosed by the flexible display screen 110; the first display portion 111, the first housing 126, the second housing 127, and the second display portion 112 are stacked sequentially. Similarly, the first display portion 111 and the second display portion 112 can 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 portion 111 and the second display portion 112. At this time, the first display portion 111 and the second display portion 112 can be considered to be located on different planes.

[0158] Combination Figure 1 and Figure 2When the foldable electronic device 100 is in the outward-folded state, the first cover 122 and the second cover 124 can approach each other, and the first display unit 111 and the second display unit 112 can approach each other. The first display unit 111, the second display unit 112, and the foldable display unit 113 can form a housing area for accommodating the first cover 122, the second cover 124, and the hinge 125. That is, the first cover 122, the second cover 124, and the hinge 125 can be accommodated in the space between the first display unit 111 and the second display unit 112.

[0159] It should be understood that the foldable electronic device 100 can be folded inward (the inward folded state can be simply referred to as the inward folded state). When the foldable electronic device 100 is in the inward folded state, the first cover 122 and the second cover 124 can be brought close to each other, and the first display unit 111 and the second display unit 112 can be brought close to each other. The first cover 122, the second cover 124, and the hinge 125 can form a housing area for accommodating the first display unit 111, the second display unit 112, and the foldable display unit 113. That is, the first display unit 111, the second display unit 112, and the foldable display unit 113 can be accommodated in the space between the first cover 122 and the second cover 124.

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

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

[0162] And in Figure 3 The foldable electronic device 100 shown has three foldable parts (first housing 126, second housing 127 and third housing 128), and therefore has three states: 1. unfolded state; 2. folded state; 3. partially unfolded state.

[0163] 1. For example Figure 3The diagram shows one 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 also be in the unfolded state.

[0164] 2. For example Figure 4 The diagram shows a possible folded state (tri-fold state) of the foldable electronic device 100. In the folded state, the first housing 126 and the second housing 127 rotate along the pivot 125, and the second housing 127 and the third housing 128 rotate along the pivot 129, maximizing the bending degree of the foldable electronic device 100. At this time, the first housing 126, the second housing 127, and the third housing 128 can be considered to be located on different planes.

[0165] 3. For example Figure 5 The diagram illustrates one 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°. The second housing 127 and the third housing 128 rotate along the pivot 129, causing the third housing 128 to move closer to the second housing 127. At this time, the first housing 126 and the second housing 127 are considered to be on the same plane, while the second housing 127 and the third housing 128 can be considered to be 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°. The first housing 126 and the second housing 127 rotate along the pivot 125, causing the first housing 126 to move closer to the second housing 127.

[0166] Figure 1 The electronic device 100 is shown only schematically, and the actual shape, size, and construction of these components are not subject to change. Figure 1 limited.

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

[0168] It should be understood that, in the embodiments of this application, when a user holds (typically vertically and facing the screen) an electronic device, the orientation of the electronic device includes a top, bottom, left side, and right side.

[0169] First, by Figures 6 to 9 This application will cover four antenna modes. Among them, Figure 6This is a schematic diagram of the common-mode structure of an antenna provided in this application and the corresponding current and electric field distribution. Figure 7 This is a schematic diagram of the differential mode structure of another antenna provided in this application and the corresponding current and electric field distribution. Figure 6 and Figure 7 The antenna radiator is open at both ends, and its common-mode and differential-mode modes can be referred to as line common-mode and line differential-mode, respectively. Figure 8 This is a schematic diagram of the common-mode structure of an antenna provided in this application and the corresponding distribution of current, electric field, and magnetic current. Figure 9 This is a schematic diagram of the differential mode structure of another antenna provided in this application and the corresponding distribution of current, electric field, and magnetic current. Figure 8 and Figure 9 The antenna radiator is grounded by coupling its two ends to the ground plane. Its common-mode and differential-mode modes can be referred to as slot common-mode and slot differential-mode, respectively.

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

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

[0172] 1. Common mode (CM) mode

[0173] Figure 6 Figure (a) shows that the radiator of antenna 40 is open at both ends and connected to a feed circuit (not shown) at the middle position 41. In one embodiment, the antenna 40 is fed in a symmetrical feed configuration. The feed circuit can be connected to the middle position 41 of antenna 40 via feed wire 42. It should be understood that symmetrical feed can be understood as one end of the feed circuit being connected to the radiator and the other end being coupled to the ground to achieve grounding, wherein the coupling point between the feed circuit and the radiator (feed point) is located at the center of the radiator, which may be, for example, the midpoint of the geometry, or the midpoint of the electrical length (or a certain area within a certain range near the aforementioned midpoint).

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

[0175] Figure 6(b) shows the current and electric field distribution of antenna 40. Figure 6 As shown in (b), the current exhibits a reverse distribution on both sides of the middle position 41, for example, a symmetrical distribution; the electric field exhibits a unidirectional distribution on both sides of the middle position 41. Figure 6 As shown in (b), the current at feeder line 42 exhibits a unidirectional distribution. Based on the unidirectional current distribution at feeder line 42, Figure 6 The type of feed shown in (a) can be called a line CM feed. This is based on the fact that the current is distributed in opposite directions on both sides of the connection between the radiator and the feed line 42. Figure 6 The antenna mode shown in (b) can be called the line CM mode (or simply CM mode; for example, for a line antenna, CM mode refers to the line CM mode). Figure 6 The current and electric field shown in (b) can be referred to as the current and electric field of the line CM mode, respectively.

[0176] The current is stronger at the middle position 41 of antenna 40 (the current is strongest near the middle position 41 of antenna 40), and weaker at both ends of antenna 40. Figure 6 As shown in (b) of the diagram. 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. Differential mode (DM)

[0178] like Figure 7 Image (a) shows that the two radiators of antenna 50 have open ends on both sides and are connected to a feed circuit at the middle position 51. In one embodiment, antenna 50 is fed using an anti-symmetrical feed. One end of the feed circuit is connected to one of the radiators via a feed wire 52, and the other end of the feed circuit is connected to the other radiator via a feed wire 52. The middle position 51 can be the geometric center of antenna 50, or the gap formed between the radiators.

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

[0180] Figure 7 (b) shows the current and electric field distribution of antenna 50. Figure 7 As shown in (b), the current in the antenna 50 is distributed in the same direction on both sides of the middle position 51, for example, an antisymmetric distribution; the electric field is distributed in opposite directions on both sides of the middle position 51. Figure 7As shown in (b), the current at feeder line 52 exhibits a reverse distribution. Based on the reverse current distribution at feeder line 52, Figure 7 The type of feed shown in (a) can be called a line DM feed. This is based on the fact that the current is distributed in the same direction on both sides of the connection between the radiator and the feed line 52. Figure 7 The antenna mode shown in (b) can be called line DM mode (or simply DM mode; for example, for a line antenna, DM mode refers to line DM mode). Figure 7 The current and electric field shown in (b) can be referred to as the current and electric field of the line DM mode, respectively.

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

[0182] It should be understood that an antenna radiator can be considered as a metal structural component that generates radiation, and its quantity can be one, such as... Figure 6 As shown, or, it can be two items, such as Figure 7 As shown, adjustments can be made according to actual design or production needs. For example, for the line CM mode, it can also be as follows: Figure 7 The diagram illustrates two radiators positioned opposite each other with a gap between them. Symmetrical feeding is used at the two ends closest to each other; for example, feeding the same feed source signal into each of the two radiators at their respective close ends can also achieve the same result as... Figure 6 The antenna structure shown achieves a similar effect. Correspondingly, for line DM mode, it can also be done as follows... Figure 6 The diagram illustrates a radiator with two feed points positioned at its center, using an anti-symmetrical feeding method. For example, by feeding signals of the same amplitude but opposite phase to the two symmetrical feed points on the radiator, a signal similar to [the one shown] can be obtained. Figure 7 The antenna structure shown has a similar effect.

[0183] 3. Line CM-DM mode

[0184] The above Figure 6 and Figure 7 The diagrams show how different feeding methods generate line CM mode and line DM mode when both ends of the radiator are open.

[0185] When the antenna is fed asymmetrically (the feed point is off-center from the radiator, including side-feed or offset feed), or when the grounding point of the radiator (coupled to the ground) is asymmetrical (off-center from the radiator), the antenna can simultaneously generate a first resonance and a 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, with current and electric field distributions as follows: Figure 6 As shown in (b) above. The second resonance corresponds to the line DM mode, and the current and electric field distribution is as follows. Figure 7 As shown in (b) of the diagram.

[0186] 4. Slot CM mode

[0187] Figure 8 The radiator of the antenna 60 shown in (a) has a hollowed-out slot or slit 61, or the radiator of the antenna 60 and ground (e.g., a floor, which may be a PCB) may enclose the slot or slit 61. The slot 61 can be formed by slotting in the floor. An opening 62 is provided on one side of the slot 61, and the opening 62 may be specifically located at the middle position on that side. The middle position on this side of the slot 61 may be, for example, the geometric midpoint of the antenna 60, or the midpoint of the electrical length of the radiator, for example, the area on the radiator where the opening 62 is provided covers the middle position on this side. A feed circuit can be connected at the opening 62, and an antisymmetric feed is used. It should be understood that antisymmetric feed can be understood as the positive and negative poles of the feed circuit being connected to the two ends of the radiator, respectively. The signal outputs from the positive and negative poles of the feed circuit have the same amplitude but opposite phase, for example, a phase difference of 180° ± 10°.

[0188] Figure 8 (b) shows the current, electric field, and magnetic current distribution of antenna 60. Figure 8 As shown in (b), the current is unidirectionally distributed around slot 61 on the conductors (such as the floor and / or radiator 60) surrounding slot 61, the electric field is oppositely distributed on both sides of the middle position of slot 61, and the magnetic current is oppositely distributed on both sides of the middle position of slot 61. Figure 8 As shown in (b), the electric field at opening 62 (e.g., the feed point) is in the same direction, and the magnetic current at opening 62 (e.g., the feed point) is also in the same direction. Based on the fact that the magnetic current at opening 62 (the feed point) is in the same direction, Figure 8 The type of feed shown in (a) can be called a slot CM feed. This is based on the current exhibiting a unidirectional distribution (e.g., antisymmetric distribution) on the radiators on both sides of opening 62, or on the current exhibiting a unidirectional distribution around slot 61 on the conductors surrounding slot 61. Figure 8 The antenna mode shown in (b) can be called slot CM mode (or simply CM mode; for example, for slot antennas, CM mode refers to slot CM mode). Figure 8 The electric field, current, and magnetic current distribution shown in (b) can be referred to as the electric field, current, and magnetic current of the slot CM mode.

[0189] The magnetic field is weaker at the center of antenna 60 and stronger at both ends. The electric field is stronger at the center of antenna 60 (the largest electric field is located near the center of antenna 60) and weaker at both ends. Figure 8 As shown in (b) of the diagram.

[0190] 5. Slot DM Mode

[0191] like Figure 9 The antenna 70 shown in (a) has a slot or slit 72 in its radiator, or the slot or slit 72 may be formed by the radiator of the antenna 70 and ground (e.g., a floor, which may be a PCB). The slot 72 can be formed by slotting in the floor. A feed circuit is connected at the middle position 71 of the slot 72, and symmetrical feeding is used. It should be understood that symmetrical feeding can be understood as one end of the feed circuit being connected to the radiator, and the other end being coupled to the floor to achieve grounding, wherein the coupling point between the feed circuit and the radiator (feed point) is located at the center of the radiator, which may be, for example, the midpoint of the geometry, or the midpoint of the electrical length (or a certain range near the aforementioned midpoint). The positive terminal of the feed circuit is connected at the middle position of one side of the slot 72, and the negative terminal of the feed circuit is connected at the middle position of the other side of the slot 72. The middle position of the side of slot 72 can be, for example, the middle position of slot antenna 60 / the middle position of ground, such as the geometric midpoint of slot antenna, or the midpoint of the electrical length of radiator, such as the middle position 51 of the side covered by the connection between the feed circuit and the radiator.

[0192] Figure 9 (b) shows the current, electric field, and magnetic current distribution of antenna 70. Figure 9 As shown in (b), in the conductors surrounding slot 72 (such as the floor and / or radiator 60), the current is distributed around slot 72, and the current is distributed in opposite directions on both sides of the middle position 71. The electric field is distributed in the same direction on both sides of the middle position 71, and the magnetic current is distributed in the same direction on both sides of the middle position 71. The magnetic current at the feed circuit is distributed in opposite directions (not shown). Based on the opposite magnetic current distribution at the feed circuit, Figure 9 The type of feed shown in (a) can be called a slot DM feed. This is based on the current exhibiting an opposite distribution (e.g., symmetrical distribution) on both sides of the connection between the feed circuit and the radiator, or on the current exhibiting an opposite distribution (e.g., symmetrical distribution) around the slot 71. Figure 9 The antenna mode shown in (b) can be called slot DM mode (or simply DM mode; for example, for slot antennas, DM mode refers to slot DM mode). Figure 9 The electric field, current, and magnetic current distribution shown in (b) can be referred to as the electric field, current, and magnetic current of the slot DM mode.

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

[0194] It should be understood that the radiating element of an antenna can be understood as a metallic structural component that generates radiation (e.g., a portion of the floor), and may include openings, such as... Figure 8 As shown, or it could be a complete ring, such as Figure 9 As shown, adjustments can be made according to actual design or production needs. For example, for the CM (Channel Module) pattern, it can also be adjusted as follows: Figure 9 The diagram shows a complete annular radiator. Two feed points are positioned in the middle of the radiator on one side of slot 61, using an anti-symmetrical feeding method. For example, signals with the same amplitude but opposite phase can be fed into both ends of the original opening position to obtain signals similar to those shown. Figure 8 The antenna structure shown achieves a similar effect. Correspondingly, for the slot DM mode, it can also be done as follows... Figure 8 The diagram shows a radiator with an opening, and symmetrical feeding at both ends of the opening. For example, the same feed source signal can be fed into both ends of the radiator on both sides of the opening to obtain the same signal. Figure 9 The antenna structure shown has a similar effect.

[0195] 6. Slotted CM-DM mode.

[0196] The above Figure 8 and Figure 9 The diagrams show how different power supply methods are used to generate slot CM mode and slot DM mode for the slot structure.

[0197] When the antenna uses asymmetrical feeding (the feed point deviates from the center position, including side feeding or offset feeding), or the opening on one side of the slot is asymmetrical (the opening deviates from the center position on that side), the antenna can simultaneously generate a first resonance and a second resonance, corresponding to the slot CM mode and slot DM mode, respectively. For example, the first resonance corresponds to the slot CM mode, and the current, electric field, and magnetic current distribution are as follows: Figure 8 As shown in (b) above. The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distributions are as follows. Figure 9 As shown in (b) of the diagram.

[0198] Since the above antenna structures can generate two operating modes (the electric field is orthogonal (the electric field product in the far field is zero, which is an integral orthogonal distribution)) with orthogonal electric fields, the isolation between the two operating modes of this antenna structure is good, and it can be applied to multi-input multi-output (MIMO) antenna systems in electronic devices.

[0199] Meanwhile, when the two antenna structures operate in two different modes (the electric field is symmetrically distributed or antisymmetrically distributed) with orthogonal electric fields (the electric field product in the far field is zero (integral orthogonal)), the two antenna structures also have good isolation and can be used as sub-units in MIMO antenna systems in electronic devices.

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

[0201] This application provides a foldable electronic device, including an antenna. The antenna utilizes a first and second frame, which are foldably configured in the electronic device, as radiators. A portion of the first frame serves as a radiating stub (including a feed point), and a portion of the second frame serves as a parasitic stub. By providing gaps in the parasitic stubs, the antenna's radiating aperture is increased to improve its radiation characteristics.

[0202] Figure 10 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

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

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

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

[0206] It should be understood that in the embodiments of this application, the coupling connection is only described using electrical connection as an example. In actual production or in practice, it can also be achieved through indirect coupling. For the sake of brevity, it will not be described in detail.

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

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

[0209] It should be understandable that, Figure 10 In the foldable electronic device 100 shown, a first pivot 203 is directly connected to a first housing 201 and a second housing 202, allowing the first housing 201 and the second housing 202 to rotate relative to each other. Furthermore, "the first pivot 203 is rotatably connected to the first housing 201 and the second housing 202" includes the case where the first pivot 203 can be rotatably connected to the first or second housing via one or more second pivots and one or more intermediate housings. For example, in one embodiment, the foldable electronic device 100 may further include a first pivot and a second pivot, and one or more intermediate housings located between the first pivot and the second pivot. The first pivot is located between the first housing 201 and the intermediate housings, and is rotatably connected to both the first housing 201 and the intermediate housings, allowing the first housing 201 and the intermediate housings to rotate relative to each other. The second pivot is located between the intermediate housings and the second housing 202, and the first pivot 203 is rotatably connected to both the intermediate housings and the second housing 202, allowing the intermediate housings and the second housing 202 to rotate relative to each other.

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

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

[0212] The second radiator 240 is the conductive portion of the second frame 220 between the third position 221 and the fourth position 222. The second radiator 240 has a fourth gap, or in other words, the second frame 220 has this fourth gap between the third position 221 and the fourth position 222. The two ends of the first element 252 are respectively coupled to the radiator portions of the second radiator 240 on both sides of the fourth gap. 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 "length" in this application refers to physical length; "electrical length" in this application refers to the ratio of physical length to the wavelength of the transmitted electromagnetic wave.

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

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

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

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

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

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

[0220] For example, the first radiator 230 may also have a gap, or in other words, the first frame 210 may have a gap between the first position 211 and the second position 212, and corresponding components may be provided thereon, with both ends of the components coupled to the radiator portions of the first radiator 230 on both sides of the gap. In this way, the structures of the first radiator 230 and the second radiator 240 are similar, and their lengths are also quite close. See below for details. Figure 44 The illustrated embodiment section.

[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 also includes a first coupling point 241 and a second coupling point 242. The second radiator 240 has the aforementioned fourth gap between the first coupling point 241 and the second coupling point 242. The first end of the first element 252 is coupled to the first coupling point 241, and the second end of the first element 252 is coupled to the second coupling point 242.

[0223] In one embodiment, the first element 252 can be used to adjust the equivalent capacitance between the first coupling point 241 and the second coupling point 242, thereby adjusting the radiation characteristics of the first parasitic resonance (e.g., the frequency of the resonant point). In one embodiment, the distance between the first coupling point 241 and the second coupling point 242 and the fourth gap is less than or equal to 5 mm. The distance between the first coupling point 241 and the second coupling point 242 and the fourth gap can be understood as the minimum distance between the first coupling point 241 and the second coupling point 242 and the conductors on both sides of the fourth gap. When the first element 252 is electrically connected to the first coupling point 241 and the second coupling point 242 via a metal spring, the distance to the fourth gap can be understood as the minimum distance between the center of the portion of the metal spring in contact with the coupling point and the conductors on both sides of the fourth gap.

[0224] It should be understood that the equivalent capacitance between the first coupling point 241 and the second coupling point 242 can be understood as the distributed capacitance formed by the fourth gap and the equivalent capacitance after the first element 252 is 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 gap (e.g., the width of the fourth gap and the relative permittivity of the dielectric filling the fourth gap).

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

[0226] According to the embodiments of this application, since the second frame is coupled to the floor at the third position 221, the current near the third position is stronger. Since a gap is opened at the fourth position, the current near the fourth position is weaker. When the fourth gap is located in a region of strong current on the second radiator 240, the effect of reducing the intensity of a single strong current point on the second radiator through the fourth gap is more significant, and the current distribution of the second radiator is relatively more uniform.

[0227] In one embodiment, a fourth gap 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 gap is less than the length of the second radiator 240 between the third gap and the fourth gap.

[0228] In one embodiment, the fourth gap 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 gap is less than or equal to three-fifths of the length of the second radiator 240 between the third gap and the fourth gap.

[0229] In one embodiment, the fourth gap 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 gap is less than or equal to one-third of the length of the second radiator 240 between the third gap and the fourth gap.

[0230] In one embodiment, the fourth gap 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 gap is less than or equal to one-seventh of the length of the second radiator 240 between the third gap and the fourth gap.

[0231] It should be understood that the location of the fourth slit, for the region with a large current in the second radiator 240, should be understood as, for the second radiator 240 without slits (for example, operating in quarter-wavelength mode), when the fourth slit is provided, the current intensity at the corresponding location becomes weaker, achieving the effect of evenly dispersing the current.

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

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

[0234] It should be understood that the use of the second radiator 240 and the first element 252 to generate the first parasitic resonance can be understood as the entirety 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 or equivalent inductance) directly affect the first parasitic resonance (e.g., the frequency of the resonant point). In a comparative embodiment, without the first electronic element 252, the resonant point of the second parasitic resonance will deviate from the target frequency band by more than a first threshold, which can be greater than or equal to 200MHz.

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

[0236] In one embodiment, the "first radiator 230 for generating the first resonance" and the "second radiator 240 and first element 252 for generating the first parasitic resonance" can be understood as a whole technical solution. The presence or absence of the first element 252 has a greater impact on the first parasitic resonance than on the first resonance itself. Compared to the solution of this application, in the solution without the first element 252, the frequency difference offset of the resonant point of the first parasitic resonance is greater than the frequency difference offset of the first resonance. For example, the frequency difference offset of the resonant point of the first parasitic resonance is more than twice or more than five times the frequency difference offset of the first resonance.

[0237] It should be understood that, in the technical solution provided in this application embodiment, when the foldable electronic device 100 is in a folded state, the first radiator 230 in the antenna 200 acts as a main radiating stub (the stub where the signal is fed into the feed point), and the second radiator 240 acts as a parasitic stub (the stub that couples the signal through coupling with the main radiating stub). The second radiator 240 can generate a first parasitic resonance through coupling with the first radiator 230. The resonant frequency of the first parasitic resonance can be determined by the length of the second radiator 240, and the resonant frequency of the first parasitic resonance can be determined by the electrical parameters of the second radiator 240 and the electrical parameters of the first element 252. In one embodiment, the length of the second radiator 240, the length of the second radiator 240, and the electrical parameters of the first element 252 are used to bring the first parasitic resonance closer to the first resonance. The first resonance and the first parasitic resonance together form a working frequency band to extend the working bandwidth of the antenna 200 and jointly support one working frequency band of the foldable electronic device 100.

[0238] The idea that the first resonance and the first parasitic resonance together form a working frequency band can be understood as the first parasitic resonance being close to the first resonance and thus forming a resonant frequency band. For example, the resonant frequency of the first resonance may be lower than the resonant frequency of the first parasitic resonance, or the resonant frequency of the first resonance may be higher than the resonant frequency of the first parasitic resonance. In one embodiment, it can also be understood that the resonant points of the first resonance and the first parasitic resonance are connected in the S11 diagram, and the S11 of the connected region is less than -4dB, thus forming a resonant frequency band.

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

[0240] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 600MHz-1.5GHz, 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 200MHz; or, in another embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 600MHz-1.5GHz, 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 100MHz.

[0241] In one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 1.5 GHz to 3 GHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the first resonance 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 to 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 3GHz-6GHz, 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 600MHz; or, in one embodiment, the resonant frequency band of the antenna 200 includes any operating frequency band within 3GHz-6GHz, 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 400MHz.

[0243] A fourth gap is provided between the first coupling point 241 and the second coupling point 242, and coupled to the first element 252 (the fourth gap on the second radiator 240 can be considered as an equivalent capacitance on the second radiator 240, for example, a distributed capacitance; the first element 252 can be used to determine the equivalent capacitance value of the fourth gap). This can reduce the intensity of individual current strong points on the second radiator 240, making the current distribution more uniform. In one embodiment, the more uniform current distribution of the second radiator 240 can reduce conductor and dielectric losses caused by the conductors and dielectrics surrounding the second radiator 240. In another embodiment, the more uniform current distribution of the second radiator 240 can increase the radiating 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 to the first element 252, can improve the system efficiency and radiation efficiency of the antenna.

[0244] Meanwhile, the first radiator 230 serves as a main radiating stub (the stub of the signal fed into the feed point), and the embodiments of this 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 and second ends of the first radiator 230 to be grounded or open (e.g., the first frame 210 is coupled to the ground plane 101 at the first position 211 or has a first gap, and the first frame 210 is coupled to the ground plane 101 at the second position 212 or has a second gap). The antenna structure formed by the first radiator 230 can operate in different antenna modes. For example, if the first and second ends of the first radiator 230 are open, the first radiator can operate in the aforementioned line CM-DM mode. If the first and second ends of the first radiator 230 are grounded, the first radiator can operate in the aforementioned slot CM-DM mode. If one end of the first and second ends of the first radiator 230 is grounded and the other end is open, the first radiator 230 can operate in a quarter-wavelength mode.

[0245] It should be understood that when one of the first and second ends of the first radiator 230 is a grounded end and the other end is an open end, and the currents on the first radiator 230 are in the same direction, then the first radiator 230 can be considered to be operating in a quarter-mode. In this mode, the grounded end current of the first radiator 230 is stronger, and the open end electric field 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 slit is less than the length of the second radiator 240 between the third slit and the fourth slit.

[0247] It should be understood that because the second frame 220 is coupled to the ground 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 gap is located in the area of ​​stronger current, the effect of reducing the intensity of a single strong current point of the second radiator 240 is more significant, and the current distribution of the second radiator 240 is relatively more uniform. Due to the relatively more uniform current distribution of the second radiator 240, the conductor loss and dielectric loss caused by the conductor and dielectric surrounding the second radiator 240 are reduced. In one embodiment, the relatively more uniform current distribution of the second radiator 240 results in a more significant increase in the radiating aperture of the second radiator 240, and a better effect on improving the system efficiency and radiation efficiency of the antenna.

[0248] In one embodiment, the first radiator 230 and the second radiator 240 are arranged adjacent to each other in a first direction (e.g., no other conductor is provided between the first radiator 230 and the second radiator 240). In one embodiment, when the first frame 210 has a gap at the first position / second position 212, the gap provided by the first frame 210 is aligned with the third gap or the fourth gap, so that when an electrical signal is fed in, the third gap or the fourth gap can couple more energy through the electric field at the gap provided by 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 this application, alignment can be understood as the two gaps at least partially overlapping in a first direction. When the two gaps completely overlap in the first direction, the radiation characteristics of the parasitic resonance generated by the second radiator are optimal.

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

[0251] In one embodiment, a second feed 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 can be fed with an electrical signal through the second feed point and can serve as a main radiating stub. Meanwhile, in one embodiment, when the foldable electronic device 100 is in the folded state, the second radiator 240 can serve as a parasitic stub in the antenna 200 while simultaneously being fed with an electrical signal through the second feed point as a main radiating stub for other antennas; this application does not impose any limitations on this.

[0252] Figure 11 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

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

[0254] This should be understandable, such as Figure 10 The two-dimensional diagram shown, and Figure 11 The three-dimensional schematic diagram shows that the second gap at the second position 212 and the fourth gap between 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 this application, the gaps provided on different frames can be understood similarly. For example, the gaps are staggered in the three-dimensional diagram to more conveniently show the radiator structures on different frames of the foldable electronic device 100.

[0255] In one embodiment, the width of the second / third / fourth gap is greater than or equal to 0.1 mm and less than or equal to 2 mm. It should be understood that the width of the gaps provided on the frame in this embodiment 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. A first end of the second element 253 is coupled to the third coupling point 243, and a second end of the second element 253 is coupled to the ground.

[0257] It should be understood that in the technical solutions provided in the embodiments of this application, the second radiator 240 is coupled to the ground at the third coupling point 243 via the second element 253, 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 between the first coupling point 241 and the second coupling point 242, which can improve the system efficiency and radiation efficiency of the antenna. The arrangement of the first element 252 and / or the second element 253 can disperse the current density on the second radiator 240 (e.g., reduce the intensity of a single strong current point, making the current distribution more uniform). In one embodiment, the relatively more uniform current distribution of the second radiator 240 can reduce conductor loss and dielectric loss caused by the conductors and dielectrics surrounding the second radiator 240. In another embodiment, the relatively more uniform current distribution of the second radiator 240 can increase the radiation aperture of the second radiator 240.

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

[0259] In one embodiment, the current on the second radiator 240 can be reversed in the region 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 reversed (e.g., excluding the reversed electric field region). There is no zero point, which disperses the current density on the total radiator, increases the radiation aperture of the second radiator 240, and effectively increases the total radiation aperture of the antenna 200 (the total radiation aperture of the first radiator 230 and the second radiator 240), reduces the loss caused by the conductor and the dielectric, and improves the radiation characteristics of the antenna.

[0260] In one embodiment, no switch is provided between the second radiator 240 and the second element 253 (e.g., 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 ground (e.g., no switch is provided between the second end of the second element 253 and the ground). The element connected in series between the second radiator 240 and the ground in this embodiment is used to disperse the current density on the radiator, thereby reducing losses caused by the radiator and the conductors surrounding it. In one embodiment, the second element 253 can influence the frequency of the resonant point to some extent, but this is different from a tuning circuit primarily used to adjust the frequency of the resonant point. Furthermore, no switch is provided at the first element to switch frequency bands, as a switch would introduce additional insertion loss, degrading the antenna's radiation performance.

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

[0262] In one embodiment, the second radiator 240 can be used to generate the first parasitic resonance. The electrical length of the second radiator 240 can be greater than three-eighths of the first wavelength, which can 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 as a ground terminal, and the second end is an open terminal. The first parasitic resonance of the second radiator 240 can 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., no reversal occurs), and the electric field between the second radiator 240 and the ground does not reverse. The electrical length of the second radiator 240 increases from one-quarter of the first wavelength to more than three-eighths of the first wavelength, but it still operates in a quarter-wavelength mode. In this case, the current density on the second radiator 240 is dispersed, and the current density between the second radiator 240 and the ground is reduced, thereby reducing the losses caused by the radiator and the conductors and dielectrics placed around the radiator, and thus improving the radiation characteristics of the antenna 200.

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

[0265] In one embodiment, the length of the second border 220 between the third position 221 and the fourth position 222 is greater than or equal to five-half the length of the first border 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 slit is less than one-quarter of the first wavelength. The electrical length between the fourth position 222 and the fourth slit is less than one-half of the first wavelength.

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

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

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

[0270] When the third coupling point 243 can be located between the third position 221 and the first coupling point 241, the first element 252 and the second element 253 are similar to being in series. In one embodiment, the second element 253 can be an inductor, which can further increase the radiation aperture of the second radiator. In another embodiment, the second element can be a capacitor, which can be used to reduce the radiation aperture of the second radiator. By simultaneously adjusting the radiation aperture of the second radiator through the first and second elements, parasitic resonance in the desired frequency band can be achieved.

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

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

[0273] When the third coupling point 243 can be located between the fourth position 222 and the second coupling point 242, the first element 252 and the second element 253 are similarly connected in parallel. 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 of the first element 252 is 2pF, the loss is high. However, the second element 253 can be used to reduce the loss while ensuring the same effect (e.g., the same radiating aperture) (the equivalent capacitance of the first element 252 is 1pF, the equivalent capacitance of the second element 253 is 1pF, and the equivalent capacitance between the first coupling point 241 and the third coupling point 243 is 2pF), thereby improving the radiation characteristics of the antenna. In one embodiment, the second element can be an inductor, which can be used to reduce the radiating aperture of the second radiator. By simultaneously adjusting the radiating aperture of the second radiator through the first and second elements, parasitic resonance in the desired frequency band can be achieved.

[0274] It should be understood that the third coupling point 243 can be located at any position on the second radiator 240, and this embodiment does not impose any limitation on 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 5mm, the radiating aperture of the second radiator 240 can be better adjusted, thereby improving the radiation characteristics of the antenna 200.

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

[0276] In one embodiment, a switch may be provided between the first element 252 and / or the second element 253 and the second radiator 240 for the position of parasitic resonance, or it can be understood as for switching the radiation aperture of the second radiator 240. This 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 may be electrically connected between a first end of the first element 252 and a first coupling point 241 or between a second end of the first element 252 and a second coupling point 242. This switch can be used to switch the first element 252 with different electrical parameters, thereby allowing the radiation aperture of the second radiator 240 to 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 between the second element 253 and ground. The switch switches the second element 253, the inductor, the capacitor, or the 0-ohm resistor. Alternatively, the switch can be used to switch the position of the third coupling point 243, allowing it to be located between the fourth position 222 and the second coupling point 242, or between the third position 221 and the first coupling point 241. For example, when the second element 253 is an inductor, the third coupling point 243 is located between the third position 221 and the first coupling point 241, increasing the radiation aperture of the second radiator 240; when the third coupling point 243 is located between the fourth position 222 and the second coupling point 242, decreasing the radiation aperture of the second radiator 240.

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

[0280] It should be understood that when the second gap at the second position 212 and the third gap (or the third gap at the fourth position 222) partially overlap in the first direction, when an electrical signal is fed into the first feed point 231, the second radiator 240 can couple more energy through the electric field at the gap, 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 equivalent element.

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

[0283] It should be understood that by designing the equivalent inductance value of the second element 253 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, conductor loss and dielectric loss can be reduced, the radiation aperture of the second radiator 240 can be increased, thereby improving the radiation characteristics of the antenna.

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

[0285] In one embodiment, the equivalent capacitance of the first element 252 may be less than or equal to a first threshold. The first threshold may be designed based on the resonant frequency of the first parasitic resonance generated by the second radiator 240. When the resonant frequency of the first parasitic resonance is less than or equal to 1 GHz, the first threshold is 10 pF. When the resonant 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, thereby improving the radiation characteristics of the antenna.

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

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

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

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

[0291] Figure 14 and Figure 15 yes Figure 11 and Figure 13 The simulation results of the antenna are shown in the figure. Among them, Figure 14 yes Figure 11 and Figure 13 The simulation results of the S-parameters of the antenna shown are displayed. Figure 15 yes Figure 11 and Figure 13 The simulation results show the radiation efficiency of the antenna and the system efficiency.

[0292] like Figure 14 As shown, it illustrates Figure 11 and Figure 13 The simulation results of the S-parameters of the antenna shown are presented.

[0293] When the foldable electronic device is in a folded state and no second radiator is provided, the antenna resonates only with the first radiator around 1.8 GHz.

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

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

[0296] like Figure 15 As shown, compared to foldable electronic devices that are in a folded state and do not have a second radiator, with resonance generated only by the first radiator, Figure 11 and Figure 13 The antennas shown all resonate with the first and second radiators, resulting in improved system efficiency and radiation efficiency.

[0297] exist Figure 11 In the antenna 200 shown, because the second radiator is coupled to the ground at the first coupling point through the first element, when the energy from the first radiator is coupled to the second radiator and resonates, the current density on the second radiator can be dispersed, reducing the intensity of individual current strong points and making the current distribution more uniform. This reduces the losses caused by the conductors and dielectrics surrounding the second radiator. Furthermore, the gaps on the second radiator can further increase the radiating aperture, improving the system efficiency and radiation efficiency of the antenna 200. Therefore, compared to... Figure 13 Antenna 300 shown Figure 11 The antenna 200 shown has high radiation efficiency and system efficiency.

[0298] Figure 16 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

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

[0300] The first frame 210 includes a fifth position 213 and a sixth position 214. A 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 portion between the fifth position 213 and the sixth position 214. In one embodiment, the first frame 210 is coupled to the floor at the fifth position 213, and a fifth gap is provided at the sixth position 214.

[0301] like Figure 17 As shown, when the foldable electronic device 100 is in a folded state, the third radiator 250 and the second radiator 240 overlap at least partially along a first direction, which 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 is Figure 10 The only difference in the antenna 200 shown is the addition of a third radiator 250 and a second feed circuit 254.

[0303] The first radiator 230 and the first feed circuit 251 can form a first antenna element. The third radiator 250 and the second feed circuit 254 can form a second antenna element. The second radiator 240 can simultaneously serve as a parasitic stub for both the first and second antenna elements, used to improve their radiation characteristics. Furthermore, since the first and second antenna elements can reuse the second radiator 240, the overall antenna structure can be miniaturized while simultaneously improving the radiation characteristics of both elements.

[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 element and the second antenna element.

[0305] In one embodiment, the first frame 210 can be coupled to the ground at the fifth position 213 via a grounding element. In one embodiment, the width of the grounding element can be greater than or equal to 2 mm to provide good isolation between the first antenna element and the second antenna element.

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

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

[0308] Figures 18 to 20 yes Figure 17 The simulation results of the antenna are shown in the figure. Among them, Figure 18 yes Figure 17 The simulation results of the S-parameters of the antenna shown are displayed. Figure 19 yes Figure 17 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 20 yes Figure 17 Simulation results of the radiation efficiency of the second antenna element and the system efficiency in the antenna shown.

[0309] like Figure 18 As shown, it illustrates Figure 17 The simulation results of the S-parameters of the antenna shown are presented.

[0310] The first antenna element (S11) can resonate at around 1.8 GHz and 1.92 GHz. The resonance at around 1.8 GHz can be generated by the first radiator (first resonance), and the resonance at around 1.92 GHz can be generated by the second radiator (first parasitic resonance).

[0311] The second antenna element (S22) can generate resonance around 1.56 GHz, which can be generated by the third radiator (second resonance).

[0312] Within the aforementioned frequency band, the isolation (S12) between the first antenna element and the second antenna element is less than -15dB, indicating good isolation between the two antenna elements.

[0313] It should be understood that in the above embodiments, the example only illustrates that the first antenna unit and the second antenna unit operate at different frequency bands. The first parasitic resonance can be used to extend the operating bandwidth of the first antenna.

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

[0315] Furthermore, when the resonant point of the first parasitic resonance is located at 1.92 GHz, the system efficiency and radiation efficiency of the first antenna element are better than those when the first parasitic resonance is located at 2.4 GHz.

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

[0317] It should be understood that the resonant 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 resonant point of the second resonance generated by the third radiator (1.56 GHz). Figure 18 The S-parameters shown are not displayed, but the first parasitic resonance significantly improves the system efficiency and radiation efficiency of the second antenna unit.

[0318] Figure 21 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

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

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

[0321] It should be understood that Figure 21 The antenna 200 shown is Figure 17 The only difference between the antennas 200 shown is the operating mode of the third radiator 250. Figure 17 In the antenna 200 shown, the first end of the third radiator 250 is coupled to the ground plane as a ground terminal, and the second end is an open terminal, allowing it to operate in quarter-wavelength mode. Figure 21 In the antenna 200 shown, the first and second ends of the third radiator 250 are open, forming a T-shaped structure, and it operates in line DM mode.

[0322] In one embodiment, the distance between the second position 212 and the fourth coupling point 244 is less than or equal to half 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 The simulation results of the antenna are shown in the figure. Among them, Figure 22 yes Figure 21 The simulation results of the S-parameters of the antenna shown are displayed. Figure 23 yes Figure 21 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 24 yes Figure 21 Simulation results of the radiation efficiency of the second antenna element and the system efficiency in the antenna shown.

[0325] like Figure 22 As shown, it illustrates Figure 32 The simulation results of the S-parameters of the antenna shown are presented.

[0326] The first antenna element (S11) can resonate at around 1.8 GHz and 1.92 GHz. The resonance at around 1.8 GHz can be generated by the first radiator (first resonance), and the resonance at around 1.92 GHz can be generated by the second radiator (first parasitic resonance).

[0327] The second antenna element (S22) can generate resonance around 1.58 GHz, which can be generated by the third radiator (second resonance).

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

[0329] like Figure 23 As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device that does not have a second radiator and only the first radiator generates resonance, the first antenna unit generates resonance from the first radiator and the second radiator, thus improving both system efficiency and radiation efficiency.

[0330] Furthermore, when the resonant point of the first parasitic resonance is located at 1.92 GHz, the system efficiency and radiation efficiency of the first antenna element are better than those when the first parasitic resonance is located at 2.4 GHz.

[0331] like Figure 24As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device without a second radiator and the second antenna only resonating through the third radiator, the system efficiency and radiation efficiency of the second antenna unit are improved after the second radiator is installed.

[0332] It should be understood that the resonant 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 resonant point of the second resonance generated by the third radiator (1.56 GHz). For the second antenna, this is significant. Figure 18 The S-parameters shown are not displayed, but the first parasitic resonance significantly improves the system efficiency and radiation efficiency of the second antenna unit.

[0333] Figure 25 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0334] It should be understood that the above embodiments are only illustrated by the example of a foldable electronic device 100 comprising only two housings (e.g., a bi-fold electronic device). In actual production or design, the technical solutions provided in the embodiments of this application can also be applied to devices comprising multiple housings (e.g., a multi-fold electronic device). Figure 25 As shown, the foldable electronic device 100, which includes three housings, is used as an example for illustration.

[0335] like Figure 25 As shown, the foldable electronic device 100 may further include a third housing 204 and a second pivot 205. The second pivot 205 is located between the second housing 202 and the third housing 204, and the second pivot 205 is rotatably connected to both the second housing 202 and the third housing 204, 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 border 260.

[0337] The third position 221 and the fourth position 222 can be located on the third border 260. The fifth position 213 and the sixth position 214 can be located on the second border 220. The first radiator 230 is the conductive portion between the first position 211 and the second position 212. The second radiator 240 is the conductive portion between the third position 221 and the fourth position 222. The third radiator 250 includes the conductive portion between the fifth position 213 and the sixth position 214.

[0338] It should be understood that Figure 25 The antenna 200 shown is Figure 16The antenna 200 shown is different 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 located on the first housing 201 and the second housing 202, respectively, and the second radiator 240 is located on the third housing 204.

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

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

[0341] It should be understood that, for the sake of brevity, the embodiments in this application are only illustrated by the example that the resonant frequency bands of the first resonance and the second resonance are the same.

[0342] In one embodiment, the resonant frequency band of the first resonance is the same as or close to the resonant frequency band of the second resonance. The first parasitic resonance can be located close to both the first and second resonances, which can be used to simultaneously improve the radiation performance of the first antenna element and the second antenna element. 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 or equal to 200MHz, and the frequency difference between the resonant point of the first parasitic resonance and the resonant point of the second resonance is less than or equal to 200MHz.

[0343] Figures 27 to 29 yes Figure 25 The simulation results of the antenna are shown in the figure. Among them, Figure 27 yes Figure 25 The simulation results of the S-parameters of the antenna shown are displayed. Figure 28 yes Figure 25 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 29 yes Figure 25 Simulation results of the radiation efficiency of the second antenna element and the system efficiency in the antenna shown.

[0344] like Figure 27 As shown, it illustrates Figure 25 The simulation results of the S-parameters of the antenna shown are presented.

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

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

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

[0348] It should be understood that in the above embodiments, the example of the first antenna unit and the second antenna unit operating at the same frequency is used for illustration only. The first antenna unit and the second antenna unit may include the same communication frequency band as sub-units in the MIMO system.

[0349] like Figure 28 As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device that does not have a second radiator and only has the first radiator to generate resonance, the first antenna unit generates resonance from the first radiator and the second radiator. Both system efficiency and radiation efficiency are improved, with system efficiency improved by about 1.5 dB and radiation efficiency improved by about 1 dB.

[0350] like Figure 29 As shown, when the foldable electronic device is in the folded state, compared to the foldable electronic device that does not have a second radiator and only the third radiator generates resonance, the second antenna unit generates resonance by the third radiator and the second radiator. Both system efficiency and radiation efficiency are improved, with system efficiency improved by about 2.5 dB and radiation efficiency improved by about 2 dB.

[0351] Figure 30 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

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

[0353] In one embodiment, the grounding point may be located in the central region of the second frame 220 between the fifth position 213 and the sixth position 214. The central region can be understood as an area within 5 mm of the center, where 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, Figure 26 In the antenna 200 shown, the first end of the third radiator 250 is coupled to the ground plane as a ground terminal, and the second end is an open terminal, allowing it to operate in quarter-wavelength mode. Figure 30 In the antenna 200 shown, the first and second ends of the third radiator 250 are open ends, forming a symmetrical T-shaped structure, and it operates in line CM mode.

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

[0356] Figures 31 to 33 yes Figure 30 The simulation results of the antenna are shown in the figure. Among them, Figure 31 yes Figure 30 The simulation results of the S-parameters of the antenna shown are displayed. Figure 32 yes Figure 30 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 33 yes Figure 30 Simulation results of the radiation efficiency of the second antenna element and the system efficiency in the antenna shown.

[0357] like Figure 31 As shown, it illustrates Figure 30 The simulation results of the S-parameters of the antenna shown are presented.

[0358] The first antenna element (S11) can resonate at around 1.9 GHz and around 2.15 GHz. The resonance at around 1.9 GHz can be generated by the first radiator (first resonance), and the resonance at around 2.15 GHz can be generated by the second radiator (first parasitic resonance).

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

[0360] It should be understood that the third radiator operates in linear CM mode, and the current on the third radiator exhibits an opposite distribution, such as a symmetrical distribution. The second radiator, however, operates in quarter-wavelength mode, and the current on the second radiator exhibits a unidirectional distribution. Therefore, when an electrical signal is fed into the third radiator, it cannot excite the second radiator to generate the first parasitic resonance, and the second antenna element cannot utilize the first parasitic resonance to extend its operating bandwidth. However, because the second antenna element cannot utilize the first parasitic resonance, the isolation (S12) between the first and second antenna elements is good, less than -13dB.

[0361] like Figure 32 As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device that does not have a second radiator and only the first radiator generates resonance, the first antenna unit generates resonance from the first radiator and the second radiator. Both system efficiency and radiation efficiency are improved, with system efficiency improved by about 3dB and radiation efficiency improved by about 1.5dB.

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

[0363] Figure 34 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

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

[0365] It should be understood that, compared to Figure 30 Antenna 200 shown, Figure 34 The only difference in the antenna 200 shown is the addition of a third element 255. Figure 30 In the antenna 200 shown, the third radiator 250 can operate in line CM mode, and the current on the third radiator 250 exhibits an opposite distribution on both sides of the grounding point, for example, a symmetrical distribution. And... Figure 34 In the antenna 200 shown, the third element 255 can be used to change the boundary conditions of the third radiator 250 so that the third radiator 250 can operate in line DM mode. The current on the third radiator 250 is distributed in the same direction on both sides of the grounding point, for example, an antisymmetric distribution.

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

[0367] Figures 35 to 37 yes Figure 34 The simulation results of the antenna are shown in the figure. Among them, Figure 35 yes Figure 34 The simulation results of the S-parameters of the antenna shown are displayed. Figure 36 yes Figure 34 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 37 yes Figure 34 Simulation results of the radiation efficiency of the second antenna element and the system efficiency in the antenna shown.

[0368] like Figure 35 As shown, it illustrates Figure 34 The simulation results of the S-parameters of the antenna shown are presented.

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

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

[0371] Within the aforementioned frequency band, since the first antenna element and the second antenna element reuse the first parasitic resonance generated by the second radiator to extend the operating bandwidth, the isolation between the first antenna element and the second antenna element (S12) is reduced compared to the above embodiment, and the isolation between the first antenna element and the second antenna element is less than -8dB.

[0372] like Figure 36 As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device that does not have a second radiator and only generates resonance through the first radiator, the first antenna element generates resonance through the first radiator and the second radiator. The system efficiency and radiation efficiency are roughly the same.

[0373] like Figure 37 As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device that does not have a second radiator and only has the first radiator to generate resonance, and the second antenna unit that has the third radiator and the second radiator to generate resonance, both the system efficiency and radiation efficiency are improved. The system efficiency is improved by about 3.5dB and the radiation efficiency is improved by about 2dB.

[0374] It should be understood that, see also Figure 32, Figure 33 as well as Figure 36 , Figure 37 The simulation results show that when the third radiator operates in CM mode, the second radiator, as a parasitic stub, improves the system efficiency and radiator efficiency of the first antenna element; when the third radiator operates in DM mode, the second radiator, as a parasitic stub, improves the system efficiency and radiator efficiency of the second antenna element.

[0375] Figure 38 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0376] It should be understood that in the above embodiments, when the antenna 200 includes a third radiator 250, the example given is that the first radiator 230 and the third radiator 250 do not overlap in a first direction. The first direction is the thickness direction of the foldable electronic device 100, for example, the z-direction. Figure 38 In the foldable electronic device 100 shown, the first radiator 230 and the third radiator 250 at least partially overlap along a 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. A second frame 220 between the first position 211 and the second position 212 includes a grounding point, and the second frame 220 is coupled to the ground 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 location 212, and a fifth coupling point 245 is further included between the feed point and the grounding point. A first end of the first tuning device 256 is coupled to the fourth coupling point 244, and a second end is coupled to the ground. A first end of the second tuning device 257 is coupled to the fifth coupling point 245, and a second end is coupled to the ground. 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, to adjust the operating mode of the first radiator.

[0379] For simplicity, the example given is that the first radiator 230 can operate in 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 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 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 portion between the first position 211 and the ground point, operating in quarter-wavelength mode. In another embodiment, when the first tuning device 256 is equivalent to a short circuit, adjusting the second tuning device 257 allows the portion of the first radiator 230 between the first position 211 and the ground point to form a slot antenna structure on the first frame on the other side of the first position 211, operating in slot CM mode or slot DM mode.

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

[0381] In one embodiment, the first end and the second end of the third radiator 250 are both open. A second frame 220 between the fifth position 213 and the sixth position 214 includes a ground point, which is coupled to a ground plane to enable the third radiator 250 to operate in line CM mode.

[0382] Figures 39 to 41 yes Figure 38 The simulation results of the antenna are shown in the figure. Among them, Figure 39 yes Figure 38 The simulation results of the S-parameters of the antenna shown are displayed. Figure 40 yes Figure 38 Simulation results of the radiation efficiency and system efficiency of the first antenna element in the antenna shown. Figure 41 yes Figure 38 Simulation results of the radiation efficiency of the second antenna element and the system efficiency in the antenna shown.

[0383] like Figure 39 As shown, it illustrates Figure 38 The simulation results of the S-parameters of the antenna shown are presented.

[0384] When the second radiator is not provided, the first antenna element (S11) can generate resonance around 1.6 GHz and 1.7 GHz. The resonance around 1.6 GHz can be generated by the linear CM mode of the first radiator, and the resonance around 1.7 GHz can be generated by the linear DM mode of the first radiator (first resonance). When the second radiator is provided, the first antenna element (S11) can generate an additional new resonance around 2 GHz (first parasitic resonance) from the second radiator.

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

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

[0387] like Figure 40 As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device that does not have a second radiator and only generates resonance through the first radiator, the first antenna unit generates resonance through the first radiator and the second radiator. Both system efficiency and radiation efficiency are improved, with system efficiency improved by about 1.5 dB and radiation efficiency improved by about 1.5 dB.

[0388] like Figure 41 As shown, when the foldable electronic device is in a folded state, compared to the foldable electronic device that does not have a second radiator and only has the first radiator to generate resonance, and the second antenna unit is generated by the third radiator, both the system efficiency and radiation efficiency are improved. The system efficiency is improved by about 2dB, and the radiation efficiency is improved by about 2dB.

[0389] It should be understood that the resonant point of the first parasitic resonance generated by the second radiator is located at 2 GHz, which is far from the resonant point of the second resonance generated by the third radiator (1.6 GHz). For the second antenna, this distance is significant. Figure 39 The S-parameters shown are not displayed, but the first parasitic resonance significantly improves the system efficiency and radiation efficiency of the second antenna unit.

[0390] Figure 42 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0391] It should be understood that in the above embodiments, the description is based solely on the example of the antenna 200 including one second element 253. In actual production or design, multiple second elements 253 may also be included, such as... Figure 42As shown. Multiple second elements 253 can more disperse the current density on the second radiator 240 (e.g., reduce the intensity of individual current strong points, making the current distribution more uniform), thereby reducing losses from the second radiator 240 and the conductors surrounding it. In one embodiment, a relatively more uniform current distribution in the second radiator 240 can increase the radiating aperture of the second radiator 240. Therefore, multiple second elements 253 can further improve the antenna's system efficiency and radiation efficiency.

[0392] In one embodiment, the second radiator 240 may also have multiple fourth slots, which can reduce the intensity of a single current strong point of the second radiator 240 and make the current distribution more uniform. In one embodiment, the relatively more uniform current distribution of the second radiator 240 can reduce conductor loss and dielectric loss caused by the conductors and dielectrics surrounding the second radiator 240. In one embodiment, the relatively more uniform current distribution of the second radiator 240 can increase the radiation aperture of the second radiator 240. Therefore, providing a fourth slot 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. In one embodiment, the 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 has a T-shaped structure, a plurality of second elements 253 may be located on both sides of the grounding point, partly between the grounding point and the third position, and partly between the grounding point and the fourth position.

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

[0395] Figure 43 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0396] It should be understood that in the above embodiments, the description only illustrates the structure of the second radiator 240 forming a line antenna (e.g., both the first and second ends of the second radiator 240 are open ends, or one end is a ground end). In actual production or design, the second radiator 240 forms a slot antenna structure (e.g., both the first and second ends of the second radiator 240 are coupled to the ground plane as ground ends), such as... Figure 43 As shown.

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

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

[0399] Figure 44 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0400] It should be understood that in the above embodiments, the example only illustrates the situation where a parasitic branch (e.g., the second radiator 240) is electrically connected to the floor. In actual production or design, the main radiating branch (e.g., the first radiator 230) may also be electrically connected to the floor, such as... Figure 44 As shown. The components electrically connecting the main radiating stub to the ground can be used to disperse the current density on the main radiating stub (e.g., reduce the intensity of a single strong current point, making the current distribution more uniform), thereby reducing losses caused by the conductors and dielectrics surrounding the main radiating stub and making the current distribution more uniform. In one embodiment, a relatively more uniform current distribution in the first radiator 230 can reduce conductor and dielectric losses caused by the first radiator 230 and the conductors and dielectrics surrounding it. In another embodiment, a relatively more uniform current distribution in the first radiator 230 can increase the radiating 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 radiating stub (e.g., the first radiator 230) may also have at least one slot, which can reduce the intensity of a single current strong point of the first radiator 230, making the current distribution more uniform. In one embodiment, the relatively more uniform current distribution of the first radiator 230 can reduce conductor loss and dielectric loss caused by the first radiator 230 and the conductors and dielectrics surrounding the first radiator 230. In one embodiment, the relatively more uniform current distribution of the first radiator 230 can increase the radiating aperture and improve the system efficiency and radiation efficiency of the antenna. In one embodiment, an element may be electrically connected between the conductors on both sides of each slot to determine the equivalent capacitance value of the slot.

[0402] It should be understood that the specific antenna structure with a slot on the first radiator 230 can be referenced to the specific structure with a slot on the second radiator 240.

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

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

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

[0406] It should be understood that the equivalent capacitance between coupling point A and coupling point B can be understood as the distributed capacitance formed by gap C and the equivalent capacitance after element D is 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 gap C (e.g., the width of gap C and the relative permittivity of the dielectric filling gap C).

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

[0408] According to the embodiments of this application, since the first frame is coupled to the floor at the first position 211, the current near the first position 211 is stronger. When a gap is opened at the second position 212, the current near the second position 212 is weaker. When the gap C is located in a region where the current is stronger on the first radiator 230, the effect of reducing the intensity of a single strong current point on the first radiator through the gap C is more significant, and the current distribution of the first radiator is relatively more uniform.

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

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

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

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

[0413] It should be understood that the location of the aforementioned slit C, for the region with a large current in the first radiator 230, should be understood as, for the first radiator 230 without slits (for example, operating in quarter-wavelength mode), when the slit C is provided, the current intensity at the corresponding location becomes weaker, achieving the effect of evenly dispersing the current.

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

[0415] In one embodiment, antenna 200 further includes element E. First radiator 230 includes coupling point F. A first end of element E is coupled to coupling point F, and a second end of element E is coupled to the ground. It should be understood that the position of element E on the first radiator 230 can be referenced to the position of second element 253 on the second radiator 240. The function and effect of element E on the first radiator 230 can be referenced to the function and effect of second element 253 on the second radiator 240. Further details are omitted here.

[0416] Figure 44 The structures associated with the first radiator in the illustrated embodiments (e.g., coupling points A and B on the first radiator, and the gap C and element D between coupling points A and B, and / or coupling point F on the first radiator 230 and element E coupled to coupling point F at one end) can be applied to other embodiments of this application to replace the first radiator structure in other embodiments.

[0417] Figures 45 to 47 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

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

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

[0420] For the sake of brevity, this embodiment of the application only uses the example where the first end of the first radiator 230, the second radiator 240, and the third radiator 250 are all open ends and the second end is coupled to the ground as a grounding end. In actual production or design, the first end and the second end of the first radiator 230, the second radiator 240, and the third radiator 250 can be set according to the actual production requirements.

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

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

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

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

[0425] like Figure 46 As shown, compared to Figure 45The antenna 200 shown may also have at least one second element 253 electrically connected between the second radiator 240 and the ground. The second element 253 can disperse the intensity of individual current strong points on the second radiator 240, making the current distribution more uniform. In one embodiment, a relatively more uniform current distribution in the second radiator 240 can reduce losses caused by the second radiator 240 and the conductors and dielectrics surrounding it. In another embodiment, a relatively more uniform current distribution in the second radiator 240 can increase the radiating 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 may also be provided with at least one fourth slit. In one embodiment, a first element 252 may be electrically connected between the conductors on both sides of each fourth slit.

[0427] like Figure 47 As shown, compared to Figure 46 The antenna 200 shown may also have at least one second element 253 coupled between the third radiator 250 and the ground. The second element 253 can disperse the current density on the third radiator 250 (e.g., reduce the intensity of individual current strong points, making the current distribution more uniform), thus making the current distribution more uniform. In one embodiment, a relatively more uniform current distribution in the third radiator 250 can reduce losses caused by the third radiator 250 and the conductors surrounding it. In another embodiment, a relatively more uniform current distribution in the third radiator 250 can increase the radiating aperture of the third radiator 250, thereby improving the system efficiency and radiation efficiency of the antenna.

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

[0429] It should be understood that the first element 252 coupled to the third radiator 250 and the second element 252 coupled to the second radiator 240; and the second element 253 that can also be coupled between the third radiator 250 and the ground, and the second element 253 that can also be coupled between the second radiator 240 and the ground; wherein, for the sake of brevity, the first element and the second element are represented by the same reference numeral because they correspond to the first element and the second element described above, respectively, and do not mean that the first element (or, the second element) coupled to the two radiators are elements of the same type and / or the same capacitance-inductance value. In one embodiment, the first element 252 coupled to the third radiator 250 can be the aforementioned capacitive element, and the first element 252 coupled to the second radiator 240 can be the aforementioned inductive element, and vice versa; the second element 253 should also be understood in this way. Figure 47 In the embodiment shown, when the foldable electronic device 100 is in a folded state, the third radiator 250 and the second radiator 240 both partially overlap with the first radiator 230 in a first direction, 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 a first direction (e.g., other conductors may be 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 may be disposed on non-adjacent housings).

[0431] In one embodiment, the second radiator 240 and the third radiator 250 may be spaced apart in a first direction (e.g., other conductors may be 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 may be disposed on non-adjacent housings).

[0432] Refer again Figure 47 In the embodiment shown, when the foldable electronic device 100 is in a 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 a first direction.

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

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

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

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

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

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

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

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

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

[0442] The frequency difference between the resonant point of the second parasitic resonance and the resonant point of the first resonance can be less than or equal to 900MHz; or the frequency difference between the resonant point of the second parasitic resonance and the resonant point of the first resonance can be between 350MHz and 700MHz (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 points of the first parasitic resonance and the first resonance is smaller than the frequency difference between the resonant points of the second parasitic resonance and the first resonance, thereby optimizing the efficiency dip and improving the system efficiency of the antenna.

[0444] Figure 48 and Figure 49 yes Figure 47 The simulation results of the antenna are shown in the figure. Among them, Figure 48 yes Figure 47 The simulation results of the S-parameters of the antenna shown are displayed. Figure 49 yes Figure 47 The simulation results show the radiation efficiency of the antenna and the system efficiency.

[0445] like Figure 48 As shown, it illustrates Figure 47 The simulation results of the S-parameters of the antenna shown are presented.

[0446] When the foldable electronic device is in a folded state and no second or third radiator is provided, the antenna resonates only with the first radiator around 1.96 GHz.

[0447] When the foldable electronic device is in a folded state and without a second radiator, the antenna can resonate with both the first and third radiators, producing two resonances near 1.96 GHz and 2.16 GHz. The resonance near 2.16 GHz (the first parasitic resonance) can be generated by the third radiator.

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

[0449] With S11 < -3dB 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] like Figure 49 As shown, compared to foldable electronic devices without parasitic stubs (e.g., second radiators, third radiators), when foldable electronic devices have parasitic stubs, the antenna's radiation characteristics are improved by the parasitic stubs, resulting in improved system efficiency and radiation efficiency.

[0451] Figures 50 to 52 This is a schematic diagram of a foldable electronic device 100 provided in an embodiment of this application.

[0452] like Figure 50 As shown, the third position 221, the fourth position 222, the fifth position 213, and the sixth position 214 can be located on the second border 220. The second radiator 240 at least partially overlaps with the first radiator 230 in the first direction, and the third radiator 250 does not completely overlap with the first radiator 230 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 also include a fourth element 256. A first end of the fourth element 256 is coupled to the first connection position 249, and a second end is coupled to the second connection position 259.

[0454] It should be understood that, Figures 45 to 48 In the antenna 200 shown, the second radiator 240 and the third radiator 250, as parasitic stubs, are located on different housings and at least partially overlap with the first radiator 230, which is the main radiating stub, in a first direction, generating resonance through indirect coupling. Figure 50 In the antenna 200 shown, the second radiator 240 and the third radiator 250 are located on the same housing. The second radiator 240 resonates through indirect coupling. The third radiator 250 is coupled to the first connection position 249 of the second radiator 240 through the second connection position 259, and also 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, thereby enhancing the indirect coupling between the third radiator 250 and the second radiator 240, making the third radiator 250 more fully excited, and improving the radiation performance.

[0456] In one embodiment, the fourth position 222 is located between the third position 221 and the fifth position 213, and the fifth position 213 is located between the sixth position 214 and the fourth position 222, as follows. Figure 50 As shown. 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, such as Figure 51 As shown. 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] like Figure 51 As shown, compared to Figure 50The antenna 200 shown may also have at least one second element 253 electrically connected between the third radiator 250 and the ground. The second element 253 can disperse the intensity of individual current strong points on the third radiator 250, making the current distribution more uniform. In one embodiment, a more uniform current distribution in the third radiator 250 can reduce losses caused by the third radiator 250 and the conductors and dielectrics surrounding it. In another embodiment, a more uniform current distribution in the third radiator 250 can increase the radiating aperture of the third radiator 250, thereby improving the antenna's system efficiency and radiation efficiency.

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

[0460] like Figure 52 As shown, compared to Figure 51 The antenna 200 shown may also have at least one second element 253 electrically connected between the second radiator 240 and the ground. The second element 253 can disperse the intensity of individual current strong points on the second radiator 240, making the current distribution more uniform. In one embodiment, a relatively more uniform current distribution in the second radiator 240 can reduce losses caused by the conductors and dielectrics surrounding the second radiator 240. In another embodiment, a relatively more uniform current distribution in the second radiator 240 can increase the radiating aperture of the third radiator 250, thereby improving the antenna's system efficiency and radiation efficiency.

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

[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 beyond the scope of this application.

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

[0464] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling, direct coupling, or communication connection shown or discussed may be through some interfaces; the direct coupling or communication connection between devices or units may be electrical or other forms.

[0465] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A foldable electronic device, characterized in that, include: The first shell, the second shell, and the floor, wherein... The first housing includes a first frame, and the second housing includes a second frame, wherein 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, wherein the second frame is coupled to the floor at the third position, and the second frame is provided with a third gap at the fourth position; A first rotating shaft is located between the first housing and the second housing, and is rotatably connected to both the first housing and the second housing; and Antenna, the antenna comprising: A first radiator and a first feeding circuit, wherein the first radiator is a conductive portion of the first frame between the first position and the second position, the first radiator includes a first feeding point, and the first feeding circuit is coupled to the first feeding point; and A second radiator and a first element, wherein the second radiator is the conductive portion of the second frame between the third and fourth positions, 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, and the second radiator has a fourth gap between the first coupling point and the second coupling point; a first end of the first element is coupled to the first coupling point, and a second end of the first element is coupled to the second coupling point; A first switch, the first switch being used to switch the first element having different electrical parameters; Wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator and the first element are used to generate a first parasitic resonance, and the first direction is the thickness direction of the foldable electronic device.

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

4. The foldable electronic device according to claim 1, characterized in that, The antenna further includes a second element; the second radiator includes a 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 used to generate the first parasitic resonance.

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

6. The foldable electronic device according to claim 4, characterized in that, 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.

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

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

9. The foldable electronic device according to claim 1, characterized in that, The electric length of the second radiator is greater than three-eighths of the first wavelength, which is the wavelength corresponding to the first parasitic resonance.

10. The foldable electronic device according to claim 1, characterized in that, When the resonant 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 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 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.

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

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

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

14. The foldable electronic device according to claim 12, characterized in that, The first frame includes a fifth position and a sixth position, the second position is located between the fifth position and the first position, the fifth position is located between the second position and the sixth position, the first frame is coupled to the floor at the fifth position, and the first frame 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 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.

15. The foldable electronic device according to claim 12, characterized in that, The first frame includes a fifth position and a sixth position, the second position is located between the fifth position and the first position, the fifth position is located between the second position and the sixth position, the first frame is coupled to the floor at the fifth position, and the first frame 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.

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

17. The foldable electronic device according to any one of claims 1 to 16, characterized in that, The foldable electronic device further includes a third housing, the third housing including a third frame, the third frame being at least partially spaced from the floor, wherein... 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 foldable electronic device further includes a second pivot, which is located between the first housing and the third housing, and is rotatably connected to both the first housing and the third housing. The antenna includes a third radiator and a second feeding circuit. The third radiator is the conductive portion 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. Since the foldable electronic device is in a folded state, the third radiator and the second radiator at least partially overlap along the first direction.

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

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

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

21. The foldable electronic device according to claim 20, characterized in that, The antenna includes a first tuning device and a second tuning device; The third radiator further includes a fourth coupling point and a fifth coupling point, wherein 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.

22. The foldable electronic device according to claim 17, characterized in that, Since the foldable electronic device is in a folded state, the first radiator and the third radiator at least partially overlap along the first direction.

23. The foldable electronic device according to claim 17, characterized in that, Since the foldable electronic device is in a folded state, the first radiator and the third radiator do not overlap at all along the first direction.

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

25. The foldable electronic device according to claim 14, characterized in that, The third radiator is used to generate a second resonance, wherein the resonant frequency band of the first resonance is the same as or close to the resonant frequency band of the second resonance.

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

27. The foldable electronic device according to claim 1, characterized in that, The antenna includes a fourth element; The first radiator further includes a fifth coupling point and a sixth coupling point. The first radiator has a sixth gap between the fifth coupling point and the sixth coupling point. The first end of the fourth element is coupled to the fifth coupling point, and the second end of the fourth element is coupled to the sixth coupling point.

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