Method and device for regulating circularly polarized wave, and electronic equipment

Abstract

This application discloses a method, apparatus, and electronic device for controlling circularly polarized waves. The radiator includes a first radiating segment and a second radiating segment connected by bends. The length between the first grounding point and the connection point is less than or equal to 1 / 16 of the wavelength of the second frequency band, and the distance between the feed point and the first grounding point is less than 1 / 16 of the wavelength of the second frequency band. A signal source is used to excite the radiator to form a first resonant mode and support a second resonant mode of the second frequency band. The second resonant mode is a 1 / 2 wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third and fourth resonant currents form a circularly polarized wave, and the radiation direction of the circularly polarized wave is related to the length ratio of the first and second radiating segments. This application can improve circular polarization performance.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to a method, apparatus, and electronic device for controlling circularly polarized waves. Background Technology

[0002] Satellite communication typically uses circularly polarized antennas, while satellite communication antennas used in mobile phones, wearable devices, and other electronic devices are linearly polarized antennas. Using linearly polarized antennas in these devices results in at least 3dB of polarization mismatch, meaning at least 3dB of performance degradation, leading to a decrease in the circular polarization efficiency of these devices. Therefore, improving the circular polarization performance of electronic devices has become a technical problem that needs to be solved. Summary of the Invention

[0003] This application provides a method, apparatus, and electronic device for controlling circularly polarized waves to improve the circular polarization performance of electronic devices.

[0004] In a first aspect, this application provides an electronic device including an antenna assembly, the antenna assembly comprising:

[0005] A radiator includes a first radiating segment and a second radiating segment connected by a bend. The radiator also includes a first free end, a connection point, a first grounding point, a feed point, and a second free end. The connection point is the junction between the first and second radiating segments. The first free end is the end of the first radiating segment furthest from the connection point, and the second free end is the end of the second radiating segment furthest from the connection point. The length between the first grounding point and the connection point is less than or equal to 1 / 16 of the wavelength of the second frequency band, and the distance between the feed point and the first grounding point is less than 1 / 16 of the wavelength of the second frequency band.

[0006] A signal source electrically connected to the feed point is used to excite the radiator to form a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. The first resonant mode forms a first resonant current between the first free end and the first ground point and returns to ground through the first ground point. The first resonant mode forms a second resonant current between the second free end and the first ground point and returns to ground through the first ground point. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third resonant current and the fourth resonant current are used to form a circularly polarized wave. The radiation direction of the circularly polarized wave is related to the length ratio of the first radiation segment and the second radiation segment.

[0007] Secondly, this application provides a method for controlling circularly polarized waves, applied to an electronic device. The electronic device includes an antenna assembly, which includes a radiator and a signal source. The radiator includes a first radiating segment and a second radiating segment connected by a bend. The radiator also includes a first free end, a connection point, a first grounding point, a feed point, and a second free end. The connection point is the junction between the first and second radiating segments. The first free end is the end of the first radiating segment furthest from the connection point, and the second free end is the end of the second radiating segment furthest from the connection point. The length between the first grounding point and the connection point is less than or equal to 1 / 16 of the wavelength of the second frequency band. The distance between the feed point and the first grounding point is less than 1 / 16 of the wavelength of the second frequency band. The signal source is electrically connected to the feed point. The signal source is used to excite the radiator to form a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. A first resonant current formed between the first free end and the first grounding point in the first resonant mode returns to ground through the first grounding point. A second resonant current formed between the second free end and the first grounding point in the first resonant mode also returns to ground through the first grounding point. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third and fourth resonant currents are used to form a circularly polarized wave. The method includes:

[0008] The ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment is adjusted to control the main radiation direction of the circularly polarized wave.

[0009] Thirdly, this application provides a circularly polarized wave modulation device applied to an electronic device. The electronic device includes an antenna assembly, which includes a radiator and a signal source. The radiator includes a first radiating segment and a second radiating segment connected by a bend. The radiator also includes a first free end, a connection point, a first grounding point, a feed point, and a second free end. The connection point is the junction between the first and second radiating segments. The first free end is the end of the first radiating segment furthest from the connection point, and the second free end is the end of the second radiating segment furthest from the connection point. The length between the first grounding point and the connection point is less than or equal to 1 / 16 of the wavelength of the second frequency band. The distance between the feed point and the first grounding point is less than 1 / 16 of the wavelength of the second frequency band. The signal source is electrically connected to the feed point. The signal source is used to excite the radiator to form a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. A first resonant current formed between the first free end and the first grounding point in the first resonant mode returns to ground through the first grounding point. A second resonant current formed between the second free end and the first grounding point in the first resonant mode also returns to ground through the first grounding point. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third and fourth resonant currents are used to form a circularly polarized wave. The device includes:

[0010] The control module is used to control the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment, thereby controlling the main radiation direction of the circularly polarized wave.

[0011] Fourthly, this application provides an electronic device including a memory and a processor. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the circularly polarized wave modulation method.

[0012] The circularly polarized wave modulation method, apparatus, and electronic device provided in this application embodiment include a radiator comprising a first radiating segment and a second radiating segment connected by bending. The radiator also includes a first free end, a connection point, a first grounding point, a feed point, and a second free end. The connection point is the junction between the first and second radiating segments. The first free end is the end of the first radiating segment furthest from the connection point, and the second free end is the end of the second radiating segment furthest from the connection point. The length between the first grounding point and the connection point is less than or equal to 1 / 16 of the wavelength of the second frequency band, and the distance between the feed point and the first grounding point is less than 1 / 16 of the wavelength of the second frequency band. A signal source is electrically connected to the feed point. The signal source is used to excite the radiator to form a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band. The first resonant mode is... The first resonant current formed between the free end and the first grounding point returns to ground through the first grounding point. The second resonant current formed between the second free end and the first grounding point in the first resonant mode also returns to ground through the first grounding point. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third resonant current and the fourth resonant current form a circularly polarized wave. The radiation direction of the circularly polarized wave is related to the length ratio of the first radiation segment and the second radiation segment. The first resonant mode and the second resonant mode can improve the efficiency of the second frequency band, thereby enabling the electronic device to support circularly polarized waves while also having good circular polarization performance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0014] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0015] Figure 2 This is a partially exploded structural diagram of an electronic device provided in an embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the structure of an antenna assembly provided in the first embodiment of the electronic device provided in this application;

[0017] Figure 4 This is a schematic diagram of the current distribution on the first resonant mode of the antenna assembly provided in the first embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the current distribution on the second resonant mode of the antenna assembly provided in the first embodiment of this application;

[0019] Figure 6 yes Figure 3 The S-parameter curves of the provided antenna assembly;

[0020] Figure 7 This is a scene diagram of a circularly polarized wave transceiver (such as a satellite) communicating with electronic devices;

[0021] Figure 8 These are the circular polarization parameters of the antenna assembly provided in the first embodiment of this application;

[0022] Figure 9 The antenna assembly provided in the first embodiment of this application forms a right-hand circularly polarized 3D radiation pattern on the display screen side;

[0023] Figure 10 The antenna assembly provided in the first embodiment has a left-handed circularly polarized 3D radiation pattern formed on the rear cover side;

[0024] Figure 11 This is a schematic diagram of the antenna assembly provided in the second embodiment of this application;

[0025] Figure 12 This is a right-hand circularly polarized 3D radiation pattern formed on the display screen side by the antenna assembly provided in the second embodiment of this application;

[0026] Figure 13 This is the left-hand circularly polarized 3D radiation pattern formed on the back cover side of the antenna assembly provided in the second embodiment of this application;

[0027] Figure 14 This is a schematic diagram of the antenna assembly provided in the third embodiment of this application;

[0028] Figure 15 This is a schematic diagram of the switch switching circuit provided in the embodiment of this application;

[0029] Figure 16 This is the 3D radiation pattern on the display screen side of the antenna assembly provided in the third embodiment of this application when the switching unit is switched to be electrically connected to the grounded large inductor;

[0030] Figure 17 This is the 3D radiation pattern of the rear cover side of the antenna assembly provided in the third embodiment of this application when the switching unit is switched to be electrically connected to the grounded large inductor;

[0031] Figure 18 This is a schematic diagram of the antenna assembly provided in the fourth embodiment of this application;

[0032] Figure 19 This is a schematic diagram of the current distribution on the second resonant mode of the antenna assembly provided in the fourth embodiment of this application;

[0033] Figure 20 This is a schematic diagram of the current distribution on the third resonant mode of the antenna assembly provided in the fourth embodiment of this application;

[0034] Figure 21 This is a schematic diagram of the antenna assembly provided in the fifth embodiment of this application;

[0035] Figure 22 This is a schematic diagram of the current distribution on the second resonant mode of the antenna assembly provided in the fifth embodiment of this application;

[0036] Figure 23 This is a schematic diagram of the current distribution on the fourth resonant mode of the antenna assembly provided in the fifth embodiment of this application;

[0037] Figure 24 This is a schematic diagram of the antenna assembly provided in the sixth embodiment of this application;

[0038] Figure 25 This is a schematic diagram of the first method for controlling circularly polarized waves provided in the embodiments of this application;

[0039] Figure 26 This is a schematic diagram of the second method for controlling circularly polarized waves provided in the embodiments of this application;

[0040] Figure 27 This is a schematic diagram of one implementation of step S100 in the first method for controlling circularly polarized waves provided in this application embodiment;

[0041] Figure 28 This is a schematic diagram of another implementation of step S100 in the first method for controlling circularly polarized waves provided in this application embodiment;

[0042] Figure 29 This application provides a device for controlling a circularly polarized wave.

[0043] Figure 30 This is a circuit block diagram of an electronic device provided in an embodiment of this application.

[0044] Explanation of icon numbers:

[0045] Electronic device 1000; display screen 200; middle frame 300; back cover 400; middle plate 310; frame 320; antenna assembly 100; radiator 10; signal source 30; first radiating section 11; second radiating section 12; first free end A; connection point B; first grounding point C; feed point D; second free end E; reference ground 500; switch switching circuit 40; control circuit 50; first current region H1; second current region H2; third current region H3; switch unit K; ground short circuit branch N1; impedance branch N2; first parasitic radiator 60; third free end F; second grounding point G; second parasitic radiator 70; fourth free end H; third grounding point I; control device 600; control module 610; memory 700; processor 800. Detailed Implementation

[0046] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without creative effort are within the protection scope of this application.

[0047] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0048] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device comprising one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0049] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of this application. The electronic device 1000 includes, but is not limited to, devices with communication functions such as mobile phones, tablets, laptops, computers, wearable devices, drones, robots, and digital cameras. This embodiment uses a mobile phone as an example for illustration; other electronic devices can refer to this embodiment.

[0050] Please see Figure 2 The electronic device 1000 includes an antenna assembly 100. Taking a mobile phone as an example, the working environment of the antenna assembly 1000 is illustrated. The electronic device 1000 includes a display screen 200, a mid-frame 300, and a back cover 400 arranged sequentially along its thickness direction. The mid-frame 300 includes a mid-plate 310 and a frame 320 surrounding the mid-plate 310. The display screen 200, mid-plate 310, and back cover 400 are stacked sequentially, forming receiving spaces between the display screen 200 and mid-plate 310, and between mid-plate 310 and back cover 400, to accommodate circuit boards, camera modules, receiver modules, batteries, various sensors, and other devices. One side of the frame 320 surrounds the edge of the display screen 200, and the other side surrounds the edge of the back cover 400, forming the complete external structure of the electronic device 1000. In this embodiment, the frame 320 and mid-plate 310 are an integral structure, while the frame 320 and back cover 400 can be separate structures. The above describes the working environment of the antenna assembly 100 using a mobile phone as an example, but the antenna assembly 100 of this application is not limited to the working environment described above.

[0051] Please see Figure 3 The electronic device 1000 includes at least an antenna assembly 100.

[0052] Please see Figure 3 The antenna assembly 100 includes a radiator 10 and a signal source 30.

[0053] Please see Figure 3 The radiator 10 includes a first radiating segment 11 and a second radiating segment 12 that are bent and connected. This application does not specify the angle at which the first radiating segment 11 and the second radiating segment 12 are bent and connected; for example, the angle can be 70°-110°, 60°-100°, or 80°-120°, etc. Further, the angle between the first radiating segment 11 and the second radiating segment 12 is around 90°, such as 80°, 85°, 88°, 89°, 90°, 91°, 94°, 100°, etc. The first radiating segment 11 and the second radiating segment 12 are orthogonal or nearly orthogonal to form orthogonal signal pairs. The concept of bending and connecting the first radiating segment 11 and the second radiating segment 12 in this application originates from the formation of circularly polarized waves; therefore, the angle at which the first radiating segment 11 and the second radiating segment 12 are bent and connected, as required to form circularly polarized waves, is within the protection scope of this application.

[0054] Please see Figure 3The radiator 10 further includes a first free end A, a connection point B, a first grounding point C, a feed point D, and a second free end E. The connection point B is the junction between the first radiating segment 11 and the second radiating segment 12. The first free end A is the end of the first radiating segment 11 furthest from the connection point B. The second free end E is the end of the second radiating segment 12 furthest from the connection point B.

[0055] The first free end A and the second free end E are insulated from other conductive structures. Of course, when the radiator 10 is part of the frame 320, the first free end A and the second free end E can be separated by an insulating filling structure (such as...). Figure 3 The shaded portion is connected to other conductive structures.

[0056] Optionally, the radiator 10 is made of a conductive material. The shape of the radiator 10 includes, but is not limited to, strip, rod, sheet, or thin film. The form of the radiator 10 includes, but is not limited to, a metal frame 320, a metal frame embedded in a plastic frame 320, a metal radiator 10 located within or on the surface of the frame 320, a flexible circuit board antenna formed on a flexible printed circuit board (FPC), a laser-directly formed antenna (LDS), a printed direct formed antenna (PDS), and a conductive sheet antenna (e.g., a metal bracket antenna). In this embodiment, the radiator 10 being part of the metal frame 320 is used as an example for explanation.

[0057] Please see Figure 3 The signal source 30 is electrically connected to the feed point D. The signal source 30 is used to excite the radiator 10 to form a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band.

[0058] Please see Figure 4 The first resonant current formed between the first free terminal A and the first grounding point C in the first resonant mode returns to ground through the first grounding point C. The second resonant current formed between the second free terminal E and the first grounding point C in the first resonant mode also returns to ground through the first grounding point C. The directions of the first and second resonant currents are opposite. The first resonant mode forms a 1 / 4 wavelength mode of the first frequency band between the second free terminal E and the first grounding point C, and the intensity of the second resonant current is greater than the intensity of the first resonant current. In other words, the resonant current between the second free terminal E and the first grounding point C in the first resonant mode makes the main contribution to the radiated energy of the first resonant mode.

[0059] The electrical length between the second free end E and the first grounding point C determines the resonant frequency of the first frequency band. Specifically, the first resonant mode forms a 1 / 4 wavelength mode corresponding to the first frequency band between the second free end E and the first grounding point C. In other words, the electrical length between the second free end E and the first grounding point C is approximately 1 / 4 wavelength of the first frequency band.

[0060] The electrical length described in this application can satisfy the following formula:

[0061]

[0062] Where L is the physical length, a is the transmission time of the electrical or electromagnetic signal in the medium, and b is the transmission time in the free scene.

[0063] Please see Figure 5 The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end A and the second free end E. The resonant current of the second resonant mode includes a third resonant current located between the first free end A and the connection point B, and a fourth resonant current located between the connection point B and the second free end E. The third resonant current and the fourth resonant current have at least a 90° phase difference. The current intensity of the fourth resonant current is greater than that of the third resonant current. In other words, the fourth resonant current makes the main contribution to the radiated energy of the second resonant mode. Specifically, the electrical length between the connection point B and the second free end E is approximately one-quarter wavelength of the second frequency band.

[0064] The direction of the fourth resonant current is the same as that of the second resonant current. The direction of the first resonant current is opposite to that of the third resonant current. Since the third and fourth resonant currents are located on the first radiation segment 11 and the second radiation segment 12, which are nearly perpendicular or perpendicular to each other, the third and fourth resonant currents are spatially perpendicular or nearly perpendicular. The amplitudes of the third and fourth resonant currents are similar, and the phase difference between the third and fourth resonant currents is at least partially 90°, thus forming a circularly polarized wave.

[0065] The center frequency of the first frequency band is lower than the center frequency of the second frequency band, and the difference between the center frequencies of the first frequency band and the second frequency band is less than 1 GHz. The first frequency band and the second frequency band form a continuous frequency band.

[0066] Please see Figure 6 , Figure 6 yes Figure 3The provided antenna assembly's S-parameter curves show that the first and second frequency bands form a continuous band with a return loss of less than -4dB, covering at least 2GHz-3GHz. The overall efficiency curve in the figure also demonstrates good efficiency within the continuous band formed by the first and second frequency bands.

[0067] In this embodiment, the distance between the feed point D and the first ground point C is less than 1 / 16 of the wavelength of the second frequency band. In other words, the feed point D and the first ground point C are spaced relatively close together, meaning the feed point D is close to the first ground point C, and both the feed point D and the first ground point C are located in the middle of the radiator 10, which has free ends at both ends. Thus, the antenna assembly is a T-type antenna. The first resonant mode can be referred to as the radiation mode of the T-type antenna, and the second resonant mode can be referred to as the balanced mode of the T-type antenna. The first resonant mode and the second resonant mode form a dual-wave resonance, and the second resonant mode is coupled with the second resonant mode, which can improve the overall in-band efficiency of the first and second frequency bands.

[0068] The length between the first grounding point C and the connection point B is less than or equal to 1 / 16 of the wavelength of the second frequency band. In other words, the first grounding point C is close to the connection point B between the first radiation segment 11 and the second radiation segment 12, for the following reasons: First, for the first resonant mode, since the direction of the first resonant current is opposite to the direction of the second resonant current and the dividing point is the first grounding point C, when the first grounding point C is located on the second radiation segment 12, the current direction between the first grounding point C and the connection point B is opposite to the current direction between the first grounding point C and the second free end E. The opposite currents have a canceling effect on far-field energy. Therefore, setting the first grounding point C close to the connection point B can effectively reduce the opposite current, thereby reducing far-field energy cancellation and improving the efficiency of the first resonant mode. Since the first resonant mode and the second resonant mode complement each other, the efficiency improvement of the first resonant mode also promotes the efficiency improvement of the second resonant mode. When the first grounding point C is close to the connection point B, the more effective portion of the third resonant current is orthogonal to the more effective portion of the fourth resonant current, thereby promoting the formation of a better circularly polarized wave by the third resonant current and the fourth resonant current, and improving the performance of the circularly polarized wave.

[0069] In this embodiment, the radiation direction of the circularly polarized wave is related to the length ratio of the first radiating segment 11 and the second radiating segment 12. When the length ratio of the first radiating segment 11 and the second radiating segment 12 is different, the current intensity of the lateral mode formed by the antenna assembly 100 on the reference floor is also different, thereby adjusting the radiation direction of the circularly polarized wave. For example, increasing the length of the laterally extended radiating segment increases the current intensity of the lateral mode formed by the antenna assembly 100 on the reference floor, which helps to shift the radiation direction of the circularly polarized wave toward the side where the top edge of the electronic device 1000 is located, thereby adjusting the radiation direction of the circularly polarized wave.

[0070] The electronic device 1000 provided in this application embodiment includes a radiator 10 comprising a first radiating segment 11 and a second radiating segment 12 connected by bending. The radiator 10 also includes a first free end A, a connection point B, a first grounding point C, a feed point D, and a second free end E. The connection point B is the connection between the first radiating segment 11 and the second radiating segment 12. The first free end A is the end of the first radiating segment 11 away from the connection point B, and the second free end E is the end of the second radiating segment 12 away from the connection point B. The length between the first grounding point C and the connection point B is less than or equal to 1 / 16 of the wavelength of the second frequency band, and the distance between the feed point D and the first grounding point C is less than 1 / 16 of the wavelength of the second frequency band. A signal source 30 is electrically connected to the feed point D. The signal source 30 is used to excite the radiator 10 to form a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band. A first resonant current formed between the first free end A and the first ground point C returns to ground through the first ground point C. A second resonant current formed between the second free end E and the first ground point C returns to ground through the first ground point C. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end A and the second free end E. The resonant current of the second resonant mode includes a third resonant current located between the first free end A and the connection point B and a fourth resonant current located between the connection point B and the second free end E. The third and fourth resonant currents form a circularly polarized wave. The first and second resonant modes can improve the efficiency of the second frequency band, thereby enabling the electronic device 1000 to support circularly polarized waves while also having good circular polarization performance. The radiation direction of the circularly polarized wave is related to the length ratio of the first radiating segment and the second radiating segment. When the length ratio of the first radiating segment 11 and the second radiating segment 12 is different, the current intensity of the lateral mode formed by the antenna assembly 100 on the reference ground is also different, thereby adjusting the radiation direction of the circularly polarized wave.

[0071] Optional, please refer to Figure 3The antenna assembly 100 also includes a matching circuit M. The matching circuit M is electrically connected between the signal source 30 and the feed point DA. The matching circuit M includes at least one of a capacitor and an inductor. Specifically, the matching circuit M may include, but is not limited to, a capacitor, an inductor, a series connection of a capacitor and an inductor, a parallel connection of a capacitor and an inductor, a series connection of the aforementioned components in parallel with a capacitor, a series connection of the aforementioned components in parallel with an inductor, two series connections in parallel, two parallel connections in series, and so on. The matching circuit M, by adjusting the impedance matching between the signal source 30 port and the radiator 10 port, facilitates the tuning of the resonant frequencies of the first and second resonant modes.

[0072] This application does not specifically limit the first and second frequency bands. Optionally, the first and second frequency bands may include, but are not limited to, 300MHz-3GHz, 3GHz-30GHz, etc. This application uses an example with the center frequency of the first frequency band at 2.0GHz and the center frequency of the second frequency band at 2.58GHz for illustration.

[0073] Please see Figure 3 The frame 320 includes a top edge 321, a first side edge 323, a bottom edge 322, and a second side edge 324 connected in sequence. The top edge 321 is the side away from the ground when the user holds and uses the electronic device 1000, and the bottom edge 322 is the side facing the ground when the user holds and uses the electronic device 1000. The first side edge 323 is the left side of the rear view, and the second side edge 324 is the right side of the rear view.

[0074] Please see Figure 3 The first radiating segment 11 is located on the first side 323, meaning the first radiating segment 11 is arranged along the first side 323. The second radiating segment 12 is located on the top edge 321, meaning the second radiating segment 12 is arranged along the top edge 321. The bent and connected first radiating segment 11 and second radiating segment 12 are located at the upper left corner of the rear view of the electronic device 1000. Further, the first radiating segment 11 may be a part of the first side 323, and the second radiating segment 12 may be a part of the top edge 321, meaning the entire bent and connected radiator 10 is a corner of the frame 320. This application eliminates the need for an additional radiator 10, utilizing the corner structure design on the frame 320 of the electronic device 1000 to form the bent and connected radiator 10, thereby exciting and generating circularly polarized waves.

[0075] The circularly polarized wave formed by the third resonant current and the fourth resonant current includes a right-hand circularly polarized wave formed on the side where the display screen of the electronic device 1000 is located. A left-hand circularly polarized wave that is mirror-symmetrical to the right-hand circularly polarized wave is formed on the side where the back cover 400 of the electronic device 1000 is located.

[0076] Please see Figure 7 , Figure 7 This is a scene diagram of a circularly polarized wave transceiver (such as a satellite) communicating with electronic device 1000. Figure 7 As can be seen from the above, in the usage scenario, the display screen side of the electronic device 1000 is directly connected to the satellite signal transmitted by the circularly polarized wave transceiver 2000, and the back cover 400 side of the electronic device 1000 receives the satellite signal reflected by other objects, so as to achieve high-efficiency communication between the circularly polarized wave transceiver 2000 and the electronic device 1000, and also ensure that the electronic device 1000 and the circularly polarized wave transceiver 2000 maintain good communication.

[0077] Optionally, the satellite signal transmitted by the circularly polarized wave transceiver 2000 is a right-hand circularly polarized wave. The antenna assembly 100 provided in this application is located at the upper right corner of the back of the electronic device 1000. In the second resonant mode formed by the antenna assembly 100, the third and fourth resonant currents form a right-hand circularly polarized wave on the side where the display screen of the electronic device 1000 is located. This allows the antenna assembly 100 to be directly connected to the right-hand circularly polarized wave transmitted by the satellite signal via the right-hand circularly polarized wave on the display screen side when the user is in a common handheld posture (holding the electronic device 1000 and looking at the display screen of the electronic device 1000). A left-hand circularly polarized wave is formed on the side where the back cover 400 is located, so that when the user is in a common handheld posture (holding the electronic device 1000 and looking at the display screen of the electronic device 1000), the antenna assembly 100 can receive the left-hand circularly polarized wave reflected back by other objects (mountains, ground, etc.) through the left-hand circularly polarized wave on the side of the back cover 400, thereby improving the reception rate of the antenna assembly 100 for satellite signals transmitted by the circularly polarized wave transceiver 2000 and improving the communication efficiency of the electronic device 1000 and the circularly polarized wave transceiver 2000 (e.g., satellite).

[0078] Please see Figure 3 The electronic device 1000 includes a reference ground plane 500. The reference ground plane 500 is made of a conductive material and can be disposed in the middle plate 310 of the electronic device 1000. Optionally, the reference ground plane 500 includes a metal alloy in the middle plate 310, a reference ground metal in the circuit board, etc. The reference ground plane 500 is disposed within the space enclosed by the frame 320, and the first grounding point C is electrically connected to the reference ground plane 500. Taking a mobile phone as an example, the reference ground plane 500 can be equivalently represented as a rectangular plate disposed within the frame 320.

[0079] In this embodiment, both the first grounding point C and the feed point D are located in the second radiation segment 12 to increase the lateral (extending direction of the top edge 321) current in the ground current formed by the second resonant mode on the reference ground 500. When the antenna assembly 100 excites more lateral current on the reference ground 500, the angle between the main radiation direction of the circularly polarized wave formed by the third resonant current and the fourth resonant current and the preset direction decreases. In other words, the main radiation direction of the circularly polarized wave formed by the third resonant current and the fourth resonant current is smaller than the preset angle, which is the angle formed between the radiation direction of the circularly polarized wave and the preset direction when the feed point D and the first grounding point C are located on the first radiation segment 11, keeping other conditions unchanged. The preset direction is the direction from the bottom edge 322 to the top edge 321. That is, the radiation pattern of the antenna assembly 100 moves closer to the direction of the top edge 321, achieving upward adjustment of the radiation pattern.

[0080] When a user's usual posture is holding the electronic device 1000 and viewing the content on the display screen 200, there is a certain angle between the surface of the display screen 200 and the horizontal plane. The main radiation direction of the right-hand circularly polarized wave on the side of the display screen 200 has a certain angle with the surface of the display screen 200. The angle of the main radiation direction of the right-hand circularly polarized wave on the side of the display screen 200 relative to the horizontal plane is the sum of the two angles mentioned above. However, the angle between the surface of the display screen 200 and the horizontal plane is variable, resulting in an variable angle of the main radiation direction of the right-hand circularly polarized wave on the side of the display screen 200 relative to the horizontal plane. During use, it is desirable that the main radiation direction of the right-hand circularly polarized wave on the display screen 200 side be directly connected to the circularly polarized wave transceiver 2000 above. Therefore, how to design the antenna assembly 100 so that the right-hand circularly polarized wave on the display screen 200 side of the electronic device 1000 is directly connected to the circularly polarized wave transceiver 2000 above, reducing reflection and obstruction, and improving satellite signal transmission efficiency, has become a technical problem that needs to be solved.

[0081] The antenna assembly 100 provided in this embodiment adjusts the transverse (extending direction of the top edge 321) current in the ground current formed on the reference ground 500 by the second resonant mode by adjusting the length of the second radiating segment 12, thereby adjusting the main radiation direction of the circularly polarized wave. Furthermore, since the third and fourth resonant currents in the second resonant mode form a circularly polarized wave, in order to keep the frequency band of the circularly polarized wave unchanged, that is, to keep the frequency band supported by the second resonant mode unchanged, the total length of the first radiating segment 11 and the second radiating segment 12 can be kept unchanged, and thus the electrical length from the first free end A to the second free end E remains unchanged, and the center frequency of the second frequency band remains unchanged. Based on this, adjusting the length of the second radiating segment 12, in other words, is to adjust the ratio of the length of the first radiating segment 11 to the length of the second radiating segment 12.

[0082] In this embodiment, the length ratio of the first radiating segment 11 to the length of the second radiating segment 12 is 1:3 to 3:1. When the length ratio of the first radiating segment 11 to the second radiating segment 12 is less than 1:3, the length of the first radiating segment 11 is too small, and the length of the first radiating segment 11 is insufficient to support a large phase span of the third resonant current on the first radiating segment 11. For example, when the length ratio of the first radiating segment 11 to the second radiating segment 12 is less than 1:3, the phase span is only 0-30°, and the third resonant current on the first radiating segment 11 and the fourth resonant current on the second radiating segment 12 are difficult to form a good circularly polarized wave. Correspondingly, when the length ratio of the first radiating segment 11 to the second radiating segment 12 is greater than 3:1, the length of the second radiating segment 12 is too small, and the length of the second radiating segment 12 is insufficient to support a large phase span of the fourth resonant current on the second radiating segment 12, and the third resonant current on the first radiating segment 11 and the fourth resonant current on the second radiating segment 12 are difficult to form a good circularly polarized wave. In this embodiment, by setting the ratio of the length of the first radiation segment 11 to the length of the second radiation segment 12 to 1:3-3:1, the third current signal on the first radiation segment 11 and the fourth current signal on the second radiation segment 12 have a large phase span, thus creating conditions for the third resonant current and the fourth resonant current to form a circularly polarized wave.

[0083] Optionally, the ratio of the length of the first radiating segment 11 to the length of the second radiating segment 12 is 1:3 to 3:1. Designing the lengths of the first radiating segment 11 and the second radiating segment 12 within this range allows the angle between the main radiation direction of the circularly polarized wave and the preset direction to be 30°-90°. Furthermore, the circularly polarized wave has a certain coverage angle in the direction from the top edge 321 to the bottom edge 322. For example, when the angle between the main radiation direction of the circularly polarized wave and the preset direction is 60°, the coverage angle range of the circularly polarized wave in the direction from the top edge 321 to the bottom edge 322 is greater than or equal to 45° (not limited to this data; it can also be 50°, 60°, 90°, etc.), enabling the circularly polarized wave to simultaneously cover a range with an angle of at least 60°-105° with respect to the preset direction.

[0084] When the angle between the main radiation direction of the circularly polarized wave and the preset direction is 90°, even if the angle between the display screen 200 of the electronic device 1000 and the horizontal plane is 0 degrees, the right-hand circularly polarized wave on the display screen 200 side of the electronic device 1000 can be directly connected to the circularly polarized wave of the satellite above. When the angle between the main radiation direction of the circularly polarized wave and the preset direction is 30°, even if the angle between the display screen 200 of the electronic device 1000 and the horizontal plane is 60 degrees, the right-hand circularly polarized wave on the display screen 200 side of the electronic device 1000 can be directly connected to the circularly polarized wave of the satellite above.

[0085] The first embodiment provided in this application will be described below with reference to the accompanying drawings.

[0086] In the first embodiment, please refer to Figure 4 The antenna assembly 100 is a T-type antenna. Both the feed point D and the first ground point C are located in the second radiating segment 12, and the distance between the feed point D and the first ground point C is relatively short. The length ratio of the first radiating segment 11 to the length of the second radiating segment 12 is 1:1. The short distance between the first ground point C and the connection point B helps to form a circularly polarized wave with good circular polarization characteristics.

[0087] Please see Figure 4 and Figure 5 The antenna assembly 100 operates in two modes: a first resonant mode and a second resonant mode. The first resonant mode is a quarter-wavelength mode (T-antenna radiating mode) in which the first free end A and the second free end E return to ground via the first grounding point C. The second resonant mode is a half-wavelength mode (T-antenna balanced mode) in which the first free end A passes through the first grounding point C to the second free end E.

[0088] Please see Figure 5 , Figure 5In the diagram, J1 represents the third resonant current, and J2 represents the fourth resonant current. J1 and J2 are spatially perpendicular and orthogonal. Since the second resonant mode is a half-wavelength mode, J1 and J2 are also 90 degrees out of phase. Therefore, the corner structure of the 320-degree frame is used as a carrier to form orthogonal J1 and J2 to excite and generate circularly polarized waves.

[0089] Please see Figure 6 , Figure 6 These are the S-parameter curves and efficiency curves of the antenna assembly 100 provided in the first embodiment of this application. Curve a is the S-parameter curve, curve b is the radiation efficiency curve, and curve c is the overall efficiency curve. The S-parameter curves show that the resonant frequency of the first resonant mode is approximately 2 GHz, and the resonant frequency of the second resonant mode is 2.5 GHz. The first and second resonant modes of the antenna assembly 100 form a dual-wave resonance. The first frequency band supported by the first resonant mode and the second frequency band supported by the second resonant mode form a continuous frequency band with a return loss of less than -4 dB. Within this continuous frequency band, the efficiency is greater than -3 dB, indicating that the radiating mode and balanced mode of the T-shaped antenna improve the in-band efficiency. The T-shaped antenna has a relatively high efficiency and is inherently very efficient.

[0090] Please see Figure 8 , Figure 8 These are the circular polarization parameters of the antenna assembly 100 provided in the first embodiment of this application. Curve a is the axial ratio curve, curve b is the left-hand circular polarization gain, and curve c is the right-hand circular polarization gain. It can be seen that at the resonant frequency of the second resonant mode at 2.5 GHz, the axial ratio is 2.9 (less than 3), indicating that a very good circularly polarized wave is generated near the resonant frequency of the second resonant mode. The difference between the left-hand and right-hand circular polarization gains reaches 10 dB, and the right-hand circular polarization gain is greater than the left-hand circular polarization gain, indicating that the circularly polarized wave formed by the antenna assembly 100 on the display screen 200 side is a right-hand circularly polarized wave.

[0091] Please see Figure 9 and Figure 10 , Figure 9 and Figure 10 This is a 3D radiation pattern of the antenna assembly 100 provided in the first embodiment of this application. Figure 9 The antenna assembly 100 provided in the first embodiment of this application forms a right-handed circularly polarized 3D radiation pattern on the display screen 200 side. From Figure 9 As can be seen, the main radiation direction of the right-hand circularly polarized wave is obliquely upward, specifically in the direction where theta = 60° and phi = 90°. That is, the angle between the main radiation direction of the right-hand circularly polarized wave and the preset direction is 60°. Furthermore, within the preset direction, the main radiation direction (main lobe) of the right-hand circularly polarized wave has a certain coverage area with other radiation directions (side lobes), for example... Figure 9 The coverage area includes a theta of 60°-120°. When the handheld electronic device 1000 is in use, the main radiation of the right-hand circularly polarized wave is directed from the top and side of the display screen 200, which facilitates signal connection with the satellite.

[0092] Figure 10 This is a 3D radiation pattern of left-hand circularly polarized radiation formed on the back cover 400 side of the antenna assembly 100 provided in the first embodiment of this application. It can be clearly seen that the main radiation directions of the left-hand circularly polarized wave and the main radiation directions of the right-hand circularly polarized wave are symmetrical with respect to the surface where the display screen 200 is located.

[0093] In the second embodiment, the antenna assembly 100 provided in this embodiment has the same structure as the antenna assembly 100 in the first embodiment. The main difference is that, please refer to [link to relevant documentation]. Figure 11 In this embodiment, the ratio of the length of the first radiating segment 11 to the length of the second radiating segment 12 is less than 1:1. In other words, the length of the second radiating segment 12 is greater than the length of the first radiating segment 11, and the total length of the radiator 10 remains unchanged. The angle between the main radiation direction of the circularly polarized wave generated by the antenna assembly 100 provided in this embodiment and the preset direction is reduced, that is, the main radiation direction of the radiation pattern of the antenna assembly 100 is shifted toward the side where the top edge 321 is located.

[0094] Taking an increase of 2.5mm in the second radiating segment 12 (e.g., 1 / 6 of the total length of the second radiating segment 12) and a decrease of 2.5mm in the first radiating segment 11 as an example, 2.5mm is merely an example; other suitable dimensions could also be used, such as 1mm, 2mm, or 5mm. In this embodiment, the length of the radiator 10 remains unchanged, so the resonant frequency of the second resonant mode remains essentially unchanged. However, due to the increased length of the second radiating segment 12, the ground current distribution of the second resonant mode on the reference ground plane 500 is more transverse, resulting in a radiation pattern that closely resembles the radiation pattern distribution of a transverse IFA antenna, thus achieving upward modulation of the radiation pattern.

[0095] Please see Figure 12 and Figure 13 , Figure 12 and Figure 13 This is a 3D radiation pattern of the antenna assembly 100 provided in the second embodiment of this application. Figure 12 This is a right-handed circularly polarized 3D radiation pattern formed by the antenna assembly 100 on the display screen 200 side, according to the second embodiment of this application. Figure 12As can be seen, the main radiation direction of the right-hand circularly polarized wave is oriented diagonally upward. Compared to the first embodiment, the angle between the main radiation direction of the right-hand circularly polarized wave and the preset direction is smaller, that is, the angle between the main radiation direction of the circularly polarized wave and the preset direction is less than 55°. This data is an example, and it can also be 50°, 45°, etc. The range covered by the circularly polarized wave in the preset direction is greater than or equal to 90°, but is not limited to this data, and can also be 120°, 150°, 180°. This embodiment achieves the adjustment of the main radiation direction of the antenna assembly 100 toward the side where the top edge 321 is located by increasing the length of the second radiation segment 12. This adjustment is more favorable to the direction of right-hand circular polarization because more energy is radiated upward on the antenna assembly 100. When the main radiation direction of the antenna assembly 100 is adjusted to be close to the top edge 321, the right-hand circularly polarized wave on the display screen 200 side of the electronic device 1000 is less obstructed, and it is easier to communicate directly with the circularly polarized wave transceiver 2000 above (e.g., satellite).

[0096] Furthermore, within a predetermined direction, the main radiation direction (main lobe) of the right-hand circularly polarized wave forms a certain radiation range with other radiation directions (side lobes), for example, Figure 9 The coverage area includes a theta of 60°-120°. When using the handheld electronic device 1000, the main radiation of the right-hand circularly polarized wave points directly upwards and to the side from the display screen 200, facilitating signal connection with the satellite.

[0097] Figure 13 This is a 3D radiation pattern of left-hand circular polarization formed on the back cover 400 side of the antenna assembly 100 provided in the second embodiment of this application. It can be clearly seen that the main radiation directions of the left-hand circular polarization wave and the main radiation directions of the right-hand circular polarization wave are symmetrical with respect to the surface where the display screen 200 is located.

[0098] In other embodiments, by reducing the length of the second radiating segment 12, the lateral current of the antenna assembly 100 on the reference ground 500 is reduced, causing the circularly polarized wave formed by the antenna assembly 100 to deflect in a direction away from the top edge 321 and closer to the bottom edge 322.

[0099] In the third embodiment, the antenna assembly 100 provided in this application is substantially the same as the antenna assembly 100 provided in the second embodiment. The main difference is that the main radiation direction of the circularly polarized wave formed by the third resonant current and the fourth resonant current is related to the ratio of the current intensity on the first radiation segment 11 and the second radiation segment 12.

[0100] When the current intensity ratios of the first radiating segment 11 and the second radiating segment 12 are different, the current intensity of the lateral mode formed by the antenna assembly 100 on the reference ground 500 is also different, thereby adjusting the radiation direction of the circularly polarized wave. For example, if the current intensity of the laterally extended radiating segment increases, the current intensity of the lateral mode formed by the antenna assembly 100 on the reference ground 500 also increases, which helps to shift the radiation direction of the circularly polarized wave toward the side where the top edge of the electronic device 1000 is located, thereby adjusting the radiation direction of the circularly polarized wave.

[0101] Please see Figure 14 The antenna assembly 100 further includes a switching circuit 40. One end of the switching circuit 40 is connected to the first grounding point C, and the other end is grounded. The switching circuit 40 is used to adjust the ratio of the current intensity on the first radiating segment 11 to the current intensity on the second radiating segment 12, so as to adjust the angle between the main radiation direction of the circularly polarized wave and the preset direction.

[0102] The antenna assembly 100 further includes a control circuit electrically connected to the switch switching circuit 40. The control circuit 50 is used to control the switch switching circuit 40 to adjust the angle between the main radiation direction of the circularly polarized wave and the preset direction based on the received intensity of the circularly polarized wave being less than a preset intensity.

[0103] Because the environment in which the electronic device 1000 is located is complex, there may be obstructions or the circularly polarized wave transceiver 2000 (e.g., a satellite) above it may be moving, causing the signal source direction of the circularly polarized wave transceiver 2000 to be uncertain. In this embodiment of the application, the control circuit 50 is configured to control the switch switching circuit 40 to adjust the ratio of the current intensity on the first radiation segment 11 to the current intensity on the second radiation segment 12 according to the received intensity of the circularly polarized wave being less than a preset intensity, so as to adjust the angle between the main radiation direction of the circularly polarized wave and the preset direction, thereby making the main radiation direction of the antenna assembly 100 adjustable, in order to deal with the problem of the uncertain signal source direction of the circularly polarized wave transceiver 2000.

[0104] Generally, when the main radiation direction of the antenna assembly 100's radiation pattern is oriented towards the top edge 321, the antenna assembly 100 has good signal strength when communicating with the circularly polarized wave transceiver 2000 (satellite) via right-hand circularly polarized waves. When direct communication between the right-hand circularly polarized wave and the satellite is obstructed or impossible (the direct connection direction is blocked), the signal strength between the right-hand circularly polarized wave and the circularly polarized wave transceiver 2000 (satellite) is less than a preset strength. To further ensure the signal stability of the electronic device 1000's communication with the satellite, this embodiment uses a control circuit 50 to control a switch switching circuit 40 to adjust the ratio of the current intensity on the first radiation segment 11 to the current intensity on the second radiation segment 12 based on the received strength of the circularly polarized wave being less than the preset strength. This adjusts the angle between the main radiation direction of the circularly polarized wave and the preset direction until the received strength of the circularly polarized wave is less than the preset strength. If the main radiation direction of the circularly polarized wave is biased towards the bottom edge 322, the antenna assembly 100 can also communicate with the circularly polarized wave transceiver 2000 through the left-hand circularly polarized wave on the back cover 400 side. This allows the antenna assembly 100 to switch the receiving direction of the circularly polarized wave according to the different sources of the circularly polarized wave. The intelligent switching ensures the stability of satellite communication in scenarios where direct connection is not possible, and also makes full use of the right-hand and left-hand circularly polarized waves formed by the antenna assembly 100.

[0105] In this embodiment, please refer to Figure 14 The resonant current distribution of the second resonant mode includes a first current region H1, a second current region H2, and a third current region H3 arranged sequentially. The second current region H2 has a current strength point, and is thus a current strength region. The current intensity of the first current region H1 is less than that of the second current region H2. The current intensity of the third current region H3 is less than that of the second current region H2. The first grounding point C is located in either the first current region H1 or the third current region H3. That is, the first grounding point C is located outside the current strength region on the radiator 10. Generally, the current strength region corresponds to the electric wall position. A switching circuit is set at the electric wall position. This switching circuit has a weak effect on adjusting the input impedance on the radiator 10, which is not conducive to effectively adjusting the ratio of the current intensity on the first radiating segment 11 to the current intensity on the second radiating segment 12.

[0106] Based on this, this application places the first grounding point C outside the electric barrier region of the second resonant mode of the radiator 10, i.e., the first current region H1 and the second current region H2. In this embodiment, the current of the second resonant mode is the current of the 1 / 2 wavelength mode. The current of the second resonant mode gradually increases from the first free end A to the center of the radiator 10, and then gradually decreases from the center of the radiator 10 to the center of the second free end E. Therefore, the area near the center of the radiator 10 is the current strength point of the second resonant mode. The center of the radiator 10 is located in the second current region H2. The first grounding point C is offset from the center of the radiator 10. In other words, the distance between the first free end A and the first grounding point C is not equal to the distance between the first grounding point C and the second free end E.

[0107] To ensure that the right-hand circularly polarized wave of the antenna assembly 100 has a better radiation direction (the main radiation direction is closer to the side where the top edge 321 is located) when the switching circuit 40 is not connected to the first grounding point C, in this embodiment, the size of the second radiating segment 12 is larger than the size of the first radiating segment 11. The length between the first grounding point C and the first free end A is less than the length between the first grounding point C and the second free end E.

[0108] The switching circuit 40 has a ground short-circuit state for the second frequency band and at least one impedance state. The at least one impedance state includes states with different impedance values. The switching circuit 40 is used to adjust the input impedance of the first ground point C by switching different impedance states, thereby adjusting the ratio of the current intensity on the first radiating segment 11 to the current intensity on the second radiating segment 12, and thus adjusting the main radiation direction of the antenna assembly 100.

[0109] Optional, please refer to Figure 15 The switching circuit 40 includes a switching unit K, a ground short-circuit branch N1, and at least one impedance branch N2. One end of the switching unit K is electrically connected to the first grounding point C, and the other end of the switching unit K can be selectively connected to at least one of the ground short-circuit branch N1 and the at least one impedance branch N2. The at least one impedance branch N2 includes at least one ground inductive branch and / or at least one ground capacitive branch that is impedance to the second frequency band. Optionally, the ground inductive branch is a ground inductor. Optionally, the ground capacitive branch is a ground capacitor.

[0110] For example, at least one impedance branch N2 includes four branches: a grounded first inductor, a grounded second inductor, a grounded first capacitor, and a grounded second capacitor, wherein the first inductor and the second inductor have different sizes, and the first capacitor and the second capacitor have different sizes.

[0111] When the switching unit K switches to the ground short-circuit branch N1 and is electrically connected to the first ground point C, that is, when the switching circuit 40 is in the ground short-circuit state, the switching circuit 40 is in the ground short-circuit state for the second frequency band, the first ground point C has a first impedance value, and at this time the ratio of the current intensity on the first radiation segment 11 to the current intensity on the second radiation segment 12 is the first ratio.

[0112] The at least one impedance branch N2 includes a grounded inductive branch (e.g., a large inductor of 20-30nH). When the switching unit K switches to the grounded inductive branch electrically connected to the first grounding point C, and the switching circuit 40 switches to the impedance state, the first grounding point C has a second impedance value. At this time, the ratio of the current intensity on the first radiating section 11 to the current intensity on the second radiating section 12 is a second ratio. The second ratio is greater than the first ratio.

[0113] Please see Figure 16 and Figure 17 , Figure 16 This is the 3D radiation pattern on the display screen 200 side of the antenna assembly 100 provided in the third embodiment of this application when the switching unit K is switched to be electrically connected to the grounded large inductor. Figure 17 This is a 3D radiation pattern of the antenna assembly 100 provided in the third embodiment of this application on the back cover 400 side when the switching unit K is switched to be electrically connected to the grounded large inductor. In this embodiment, the angle between the main radiation direction of the circularly polarized wave and the preset direction is a second angle, which is greater than 100°. The antenna assembly 100 can communicate with the circularly polarized wave transceiver 2000 (e.g., a satellite) via the left-hand circularly polarized wave. In the second embodiment, the angle between the main radiation direction of the circularly polarized wave and the preset direction is a first angle, which is less than 55°. The antenna assembly 100 can communicate with the circularly polarized wave transceiver 2000 (e.g., a satellite) via the right-hand circularly polarized wave.

[0114] In other words, compared to when the switching unit K switches to the ground short-circuit branch N1, when the switching unit K switches to the ground inductive branch, the current intensity of the second radiation segment 12 decreases, the ratio of the current intensity of the first radiation segment 11 to the current intensity of the second radiation segment 12 increases, and the main radiation direction of the antenna assembly 100 points to the side where the bottom edge 322 is located.

[0115] Optionally, the control circuit 50 is electrically connected to the switching unit K. The initial state of the switching unit K is an electrical connection between the ground short-circuit branch N1 and the first ground point C. Since the first ground point C corresponds to the first main radiation direction when electrically connected to the ground short-circuit branch N1, this first main radiation direction is biased towards the side where the top edge 321 is located, and right-hand circularly polarized waves operate. When the direction of the circularly polarized wave transmitted by the circularly polarized wave transceiver 2000 (e.g., a satellite) differs significantly from the first main radiation direction of the antenna assembly 100, the receiving end of the antenna assembly 100 detects that the received intensity of the circularly polarized wave is less than a preset intensity. It then transmits a trigger signal indicating that the received intensity of the circularly polarized wave is less than the preset intensity to the control circuit 50. The control circuit 50 controls the switching unit K to disconnect the ground short-circuit branch N1 from the first ground point C, and sequentially connects other impedance branches N2 to the first ground point C. It then determines the target impedance branch N2 with a signal strength greater than the preset intensity and... The target impedance branch N2 is electrically connected to the first grounding point C. The target impedance branch N2 changes the impedance value of the first grounding point C and changes the intensity of the third resonant current on the first radiation segment 11 and the intensity of the fourth resonant current on the second radiation segment 12, so that the main radiation direction of the circularly polarized wave formed by the third resonant current and the fourth resonant current is the second main radiation direction. This second main radiation direction corresponds to the direction of the circularly polarized wave transmitted by the circularly polarized wave transceiver device 2000 (e.g., a satellite). Therefore, the receiving end of the antenna assembly 100 detects that the received intensity of the circularly polarized wave is greater than the preset intensity.

[0116] The antenna assembly 100 provided in the third embodiment is illustrated below with reference to the accompanying drawings. When the switching unit K is switched to the ground short-circuit branch N1, which is electrically connected to the first ground point C, it is the antenna assembly 100 provided in the second embodiment. When the switching unit K is switched to the inductive branch, a large grounded inductor is connected in series at the first ground point C. By adjusting the input impedance of the first ground point C, the center frequency of the second resonant mode remains unchanged, and the current ratio of the second resonant mode in the first radiating segment 11 and the second radiating segment 12 changes slightly. Due to the increase in the current intensity in the second radiating segment 12, the ratio of the current intensity in the first radiating segment 11 to the current intensity in the second radiating segment 12 increases compared to the ratio of the current intensity in the first radiating segment 11 to the current intensity in the second radiating segment 12 in the second embodiment.

[0117] The antenna assembly 100 provided in this embodiment can be switched to the ground short-circuit branch N1 by setting the switch unit K, so as to realize the direct connection between the right-hand circularly polarized wave on the display screen 200 side of the electronic device 1000 and the satellite communication equipment; then, in the scenario where the right-hand circularly polarized wave on the display screen 200 side of the electronic device 1000 cannot be directly connected to the satellite communication equipment, and it is ineffective to adjust the right-hand circularly polarized pattern upward, the switch unit K is switched to the inductive branch to realize the distribution ratio control of J1, J2, so that the radiation direction of the left-hand circularly polarized wave on the back cover 400 side of the electronic device 1000 is as low as possible and closer to the ground, so as to receive more left-hand circularly polarized waves reflected from the satellite.

[0118] Optional, please refer to Figure 18 The antenna assembly 100 further includes a first parasitic radiator 60. The first parasitic radiator 60 includes a third free end F and a second grounding point G. The third free end F is disposed opposite to the second free end E, and the second grounding point G is grounded. The first parasitic radiator 60 is coupled to the radiator 10.

[0119] The first parasitic radiator 60 and the second free end E form a port-to-port antenna between the first grounding point C and the second free end E.

[0120] Please see Figure 19 The second resonant mode also forms a fifth resonant current in the same direction as the fourth resonant current at the third free terminal F and the second grounding point G. Due to the addition of the first parasitic radiator 60, the main current of the second resonant mode is distributed between the first grounding point C and the third free terminal F. The intensity of the fifth resonant current is less than that of the fourth resonant current. The second resonant mode includes a combination of the T-antenna balanced mode and the EE radiating mode.

[0121] Optionally, the radiator 10 and the first parasitic radiator 60 also form a third resonant mode supporting the third frequency band under the excitation of the signal source 30. The center frequency of the third frequency band is greater than the center frequency of the second frequency band. The center frequency of the third frequency band may be greater than, less than, or equal to the center frequency of the first frequency band, wherein the third frequency band may support Wi-Fi 2.4G band, B41 band, N78 band, etc.

[0122] Please see Figure 20The third resonant mode generates a sixth resonant current between the first grounding point C and the second free end E. The third resonant mode also generates a seventh resonant current between the third free end F and the second grounding point G. The intensity of the seventh resonant current is greater than that of the sixth resonant current. The direction of the seventh resonant current is opposite to that of the sixth resonant current. The third resonant mode is the EE balanced mode of the port-to-port antenna formed by the first grounding point C, the second free end E, and the first parasitic radiator 60.

[0123] When the second radiating segment 12 is larger than the first radiating segment 11, the phase critical point of the third resonant current and the fourth resonant current is located on the second radiating segment 12, and the phase span on the first radiating segment 11 decreases, resulting in a reduction in the efficiency of the circularly polarized wave. By setting the third resonant mode, the existence of the third resonant mode can further improve the in-band efficiency of the first resonant mode and the second resonant mode, thus further improving the efficiency of the circularly polarized wave. The addition of the third resonant mode enables the antenna assembly 100 to support more frequency bands. The third resonant mode can also increase the bandwidth of the first resonant mode and the second resonant mode to form a broadband antenna.

[0124] Optional, please refer to Figure 21 The antenna assembly 100 further includes a second parasitic radiator 70. The second parasitic radiator 70 includes a fourth free end H and a third grounding point I. The fourth free end H is disposed opposite to the first free end A, and the third grounding point I is grounded. The second parasitic radiator 70 is coupled to the radiator 10.

[0125] The second parasitic radiator 70 forms a port-to-port antenna with the first free end A to the first grounding point C.

[0126] Please see Figure 22 The main current distribution of the second resonant mode is between the first free end A and the first ground point C. The radiator 10 between the first free end A and the first ground point C can couple with the second parasitic radiator 70, causing an eighth resonant current in the same direction as the third resonant current to be formed on the fourth free end H and the third ground point I. At this time, the second resonant mode includes a combination of the balanced mode of the T antenna and the radiating mode of the EE (electric field-electric field) mode. The current intensity of the third resonant current is greater than that of the eighth resonant current.

[0127] The radiator 10 and the second parasitic radiator 70, under the excitation of the signal source 30, also form a fourth resonant mode supporting the fourth frequency band. The center frequency of the fourth frequency band is greater than the center frequency of the second frequency band. The center frequency of the fourth frequency band may be greater than, less than, or equal to the center frequency of the third frequency band, wherein the fourth frequency band may support Wi-Fi 2.4G band, B41 band, N78 band, etc.

[0128] Please see Figure 23 The fourth resonant mode forms a ninth resonant current between the first grounding point C and the first free end A. The fourth resonant mode forms a tenth resonant current between the fourth free end H and the third grounding point I. The current intensity of the tenth resonant current is greater than that of the ninth resonant current. The direction of the tenth resonant current is opposite to that of the ninth resonant current. The fourth resonant mode is the EE balanced mode of the port-to-port antenna formed by the first grounding point C, the first free end A, and the second parasitic radiator 70.

[0129] When the second radiation segment 12 is larger than the first radiation segment 11, the phase critical point of the third resonant current and the fourth resonant current is located on the second radiation segment 12, the phase span on the first radiation segment 11 decreases, and the efficiency of the circularly polarized wave decreases. By setting the fourth resonant mode, the existence of the fourth resonant mode can further improve the in-band efficiency of the first resonant mode and the second resonant mode, thus further improving the efficiency of the circularly polarized wave. The addition of the fourth resonant mode enables the antenna assembly 100 to support more frequency bands.

[0130] For other implementations, please refer to Figure 24 The first parasitic radiator 60 and the second parasitic radiator 70 can coexist. At this time, the third resonant mode and the fourth resonant mode can coexist, further improving the in-band efficiency of the first resonant mode and the second resonant mode, thus further improving the efficiency of the circularly polarized wave. This enables the antenna assembly 100 to support more frequency bands, such as forming dual-wave bands supporting N41 and N78. The fourth resonant mode can also increase the bandwidth of the first resonant mode and the second resonant mode to form a broadband antenna.

[0131] The electronic device 1000 provided in this application, by adjusting the length ratio of the transverse and longitudinal radiating sections and adding a switching circuit 40 at the first grounding point C, regulates the ratio of the third resonant current J1 and the fourth resonant current J2. This allows for flexible control of the main radiation pattern of the circularly polarized wave, thereby achieving intelligent control of the circularly polarized antenna pattern and ensuring the connection stability of the circularly polarized wave. Furthermore, by adding parasitic stubs to the main radiator 10, radiation efficiency is improved, more resonances are added, and more frequency bands are covered, achieving a broadband antenna.

[0132] Please refer to the following: Figures 1-24This application also provides a method for controlling circularly polarized waves, applied to the electronic device 1000 provided in any of the above embodiments. The electronic device 1000 includes an antenna assembly 100. The antenna assembly 100 includes a radiator 10 and a signal source 30. The radiator 10 includes a first radiating segment 11 and a second radiating segment 12 connected by a bend. The length ratio of the first radiating segment 11 to the second radiating segment 12 is 1:3 to 3:1. The radiator 10 also includes a first free end A, a connection point B, a first ground point C, a feed point D, and a second free end E. The connection point B is the connection between the first radiating segment 11 and the second radiating segment 12. The first free end A is the end of the first radiating segment 11 away from the connection point B. The second free end E is the end of the second radiating segment 12 away from the connection point B. The length between the first ground point C and the connection point B is less than or equal to 1 / 16 of the wavelength of the second frequency band. The distance between the feed point D and the first ground point C is less than 1 / 16 of the wavelength of the second frequency band. The signal source 30 is electrically connected to the feed point D. The signal source 30 is used to excite the radiator 10 to form a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. The first resonant mode forms a first resonant current between the first free end A and the first ground point C, which returns to ground through the first ground point C. The first resonant mode also forms a second resonant current between the second free end E and the first ground point C, which returns to ground through the first ground point C. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end A and the second free end E. The resonant current of the second resonant mode includes a third resonant current located between the first free end A and the connection point B, and a fourth resonant current located between the connection point B and the second free end E. The third resonant current and the fourth resonant current form a circularly polarized wave.

[0133] Please see Figure 25 The method includes:

[0134] Step S100: Adjust the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12 to adjust the main radiation direction of the circularly polarized wave.

[0135] Because the environment in which the electronic device 1000 is located is complex, there may be obstructions or the circularly polarized wave transceiver 2000 above it (such as a satellite) may be moving, causing the signal source direction of the circularly polarized wave transceiver 2000 to be uncertain. The electronic device 1000 provided in this application adjusts the intensity ratio of the third resonant current on the first radiation segment 11 to the fourth resonant current on the second radiation segment 12 to adjust the main radiation direction of the circularly polarized wave, thereby making the radiation pattern of the circularly polarized wave adjustable. This addresses the problem of the uncertain signal source direction of the circularly polarized wave transceiver 2000 and achieves signal stability of the circularly polarized wave.

[0136] In this embodiment, please refer to the relevant documentation. Figure 14 The resonant current distribution of the second resonant mode includes a first current region H1, a second current region H2, and a third current region H3 arranged sequentially. The second current region H2 has a current strength point, and is thus a current strength region. The current intensity of the first current region H1 is less than that of the second current region H2. The current intensity of the third current region H3 is less than that of the second current region H2. The first grounding point C is located in either the first current region H1 or the third current region H3. That is, the first grounding point C is located outside the current strength region on the radiator 10. Generally, the current strength region corresponds to the electric wall position. A switching circuit is set at the electric wall position. This switching circuit has a weak effect on adjusting the input impedance on the radiator 10, which is not conducive to effectively adjusting the ratio of the current intensity on the first radiating segment 11 to the current intensity on the second radiating segment 12.

[0137] Based on this, this application places the first grounding point C outside the electric barrier region of the second resonant mode of the radiator 10, i.e., the first current region H1 and the second current region H2. In this embodiment, the current of the second resonant mode is the current of the 1 / 2 wavelength mode. The current of the second resonant mode gradually increases from the first free end A to the center of the radiator 10, and then gradually decreases from the center of the radiator 10 to the center of the second free end E. Therefore, the area near the center of the radiator 10 is the current strength point of the second resonant mode. The center of the radiator 10 is located in the second current region H2. The first grounding point C is offset from the center of the radiator 10. In other words, the distance between the first free end A and the first grounding point C is not equal to the distance between the first grounding point C and the second free end E.

[0138] To ensure that the right-hand circularly polarized wave of the antenna assembly 100 has a better radiation direction (the main radiation direction is closer to the side where the top edge 321 is located) when the switching circuit 40 is not connected to the first grounding point C, in this embodiment, the size of the second radiating segment 12 is larger than the size of the first radiating segment 11. The length between the first grounding point C and the first free end A is less than the length between the first grounding point C and the second free end E.

[0139] Optional, please refer to the following: Figure 14 and Figure 15 The antenna assembly 100 further includes a switching circuit 40 and a control circuit 50. One end of the switching circuit 40 is connected to the first grounding point C, and the other end of the switching circuit 40 is grounded. The switching circuit 40 has a ground short-circuit state for the second frequency band and at least one impedance state. The switching circuit 40 is used to adjust the input impedance of the first grounding point C by switching different impedance states, thereby adjusting the ratio of the current intensity on the first radiating segment 11 to the current intensity on the second radiating segment 12, and adjusting the angle between the main radiation direction of the circularly polarized wave and the preset direction.

[0140] Optional, please refer to the following: Figure 15 The switching circuit 40 includes a switching unit K, a ground short-circuit branch N1, and at least one impedance branch N2. One end of the switching unit K is electrically connected to the first grounding point C, and the other end of the switching unit K can be selectively connected to at least one of the ground short-circuit branch N1 and the at least one impedance branch N2. The at least one impedance branch N2 includes at least one ground inductive branch and / or at least one ground capacitive branch that is impedance to the second frequency band. Optionally, the ground inductive branch is a ground inductor. Optionally, the ground capacitive branch is a ground capacitor.

[0141] Optionally, at least one impedance branch N2 includes four branches, namely a grounded first inductor, a grounded second inductor, a grounded first capacitor, and a grounded second capacitor, wherein the first inductor and the second inductor have different sizes, and the first capacitor and the second capacitor have different sizes.

[0142] When the switching unit K switches to the ground short-circuit branch N1 and is electrically connected to the first ground point C, that is, when the switching circuit 40 is in the ground short-circuit state, the switching circuit 40 is in the ground short-circuit state for the second frequency band, the first ground point C has a first impedance value, and at this time the ratio of the current intensity on the first radiation segment 11 to the current intensity on the second radiation segment 12 is the first ratio.

[0143] The at least one impedance branch N2 includes a grounded inductive branch (e.g., a large inductance of 20-30nH). When the switching unit K switches to the grounded inductive branch electrically connected to the first grounding point C, and the switching circuit 40 switches to the impedance state, the first grounding point C has a second impedance value, at which time the ratio of the current intensity on the first radiating section 11 to the current intensity on the second radiating section 12 is a second ratio.

[0144] Before step S100, please refer to Figure 26 The method further includes:

[0145] Step S200: Compare the intensity of the circularly polarized wave received by the antenna assembly 100 with a preset intensity.

[0146] Step S300: When the received strength of the circularly polarized wave is less than the preset strength, control the switching circuit 40 to switch from the ground short-circuit state to the impedance state.

[0147] The control circuit 50 is electrically connected to the switching unit K. The initial state of the switching unit K is an electrical connection between the ground short-circuit branch N1 and the first ground point C. Since the first ground point C corresponds to the first main radiation direction when electrically connected to the ground short-circuit branch N1, this first main radiation direction is biased towards the side where the top edge 321 is located, and right-hand circularly polarized waves operate. When the direction of the circularly polarized wave transmitted by the circularly polarized wave transceiver 2000 (e.g., a satellite) differs significantly from the first main radiation direction of the antenna assembly 100, the receiving end of the antenna assembly 100 detects that the received strength of the circularly polarized wave is less than a preset strength. It then transmits a trigger signal indicating that the received strength of the circularly polarized wave is less than the preset strength to the control circuit 50. The control circuit 50 controls the switching unit K to disconnect the ground short-circuit branch N1 from the first ground point C, and sequentially connects other impedance branches N2 to the first ground point C. That is, the control circuit 50 controls the switch switching circuit 40 to switch from the ground short-circuit state to the impedance state, determining the signal strength. A target impedance branch N2 with a strength greater than a preset value is formed, and this target impedance branch N2 is electrically connected to the first grounding point C. The target impedance branch N2 changes the impedance value of the first grounding point C and changes the intensity of the third resonant current on the first radiation segment 11 and the intensity of the fourth resonant current on the second radiation segment 12, so that the main radiation direction of the circularly polarized wave formed by the third resonant current and the fourth resonant current is the second main radiation direction. This second main radiation direction corresponds to the direction of the circularly polarized wave transmitted by the circularly polarized wave transceiver device 2000 (e.g., a satellite). Therefore, the receiving end of the antenna assembly 100 detects that the received intensity of the circularly polarized wave is greater than the preset value.

[0148] Generally, when the main radiation direction of the antenna assembly 100's radiation pattern is oriented towards the top edge 321, the antenna assembly 100 has good signal strength when communicating with the circularly polarized wave transceiver 2000 (satellite) via right-hand circularly polarized waves. When direct communication between the right-hand circularly polarized wave and the satellite is obstructed or impossible (the direct connection direction is blocked), the signal strength between the right-hand circularly polarized wave and the circularly polarized wave transceiver 2000 (satellite) is less than a preset strength. To further ensure the signal stability of the electronic device 1000's communication with the satellite, this embodiment uses a control circuit 50 to control a switch switching circuit 40 to adjust the ratio of the current intensity on the first radiation segment 11 to the current intensity on the second radiation segment 12 based on the received strength of the circularly polarized wave being less than the preset strength. This adjusts the angle between the main radiation direction of the circularly polarized wave and the preset direction until the received strength of the circularly polarized wave is less than the preset strength. If the main radiation direction of the circularly polarized wave is biased towards the bottom edge 322, the antenna assembly 100 can also communicate with the circularly polarized wave transceiver 2000 through the left-hand circularly polarized wave on the back cover 400 side. This allows the antenna assembly 100 to switch the receiving direction of the circularly polarized wave according to the different sources of the circularly polarized wave. The intelligent switching ensures the stability of satellite communication in scenarios where direct connection is not possible, and also makes full use of the right-hand and left-hand circularly polarized waves formed by the antenna assembly 100.

[0149] Please see Figure 27 Step S100 includes:

[0150] Step S110: Reduce the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12, so that the angle between the main radiation direction of the circularly polarized wave and the preset direction is reduced. The preset direction is the direction from the bottom edge 322 of the electronic device 1000 to the top edge 321 of the electronic device 1000.

[0151] Specifically, the impedance of the control switch circuit 40 is reduced to decrease the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12.

[0152] In this embodiment, when the angle between the direction of the circularly polarized wave transmitted by the circularly polarized transceiver 2000 (e.g., a satellite) and the preset direction is small, while the angle between the main radiation direction of the antenna assembly 100 and the preset direction is large, the control circuit 50 controls the impedance of the switch switching circuit 40 to a relatively low impedance state, for example, switching from a large ground inductor to a small ground inductor, or switching from a large ground inductor to a ground short-circuit branch N1, so as to reduce the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12, so that the main radiation direction of the antenna assembly 100 is adjusted towards the side where the top edge 321 is located, so that the main radiation direction of the antenna assembly 100 corresponds to the direction of the circularly polarized wave transmitted by the circularly polarized wave transceiver 2000 (e.g., a satellite), so as to ensure that the circularly polarized wave has a better signal strength.

[0153] Please see Figure 28 Step S120: Increase the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12, so that the angle between the main radiation direction of the circularly polarized wave and the preset direction increases. The preset direction is the direction from the bottom edge 322 of the electronic device 1000 to the top edge 321 of the electronic device 1000.

[0154] Specifically, the impedance of the control switch circuit 40 is increased to increase the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12.

[0155] In this embodiment, when the angle between the direction of the circularly polarized wave transmitted by the circularly polarized transceiver 2000 (e.g., a satellite) and the preset direction is large, while the angle between the main radiation direction of the antenna assembly 100 and the preset direction is small, the control circuit 50 controls the impedance of the switch switching circuit 40 to a relatively high impedance state, for example, switching from a grounded small inductor to a grounded large inductor, or switching from a grounded short-circuit branch N1 to a grounded small inductor, so as to increase the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12, so that the main radiation direction of the antenna assembly 100 is adjusted towards the side where the bottom edge 322 is located, so that the main radiation direction of the antenna assembly 100 corresponds to the direction of the circularly polarized wave transmitted by the circularly polarized wave transceiver 2000 (e.g., a satellite), so as to ensure that the circularly polarized wave has a better signal strength.

[0156] Please see Figure 29This application also provides a circularly polarized wave modulation device 600, applied to an electronic device 1000. The electronic device 1000 includes an antenna assembly 100. The antenna assembly 100 includes a radiator 10 and a signal source 30. The radiator 10 includes a first radiating segment 11 and a second radiating segment 12 connected by a bend. The length ratio of the first radiating segment 11 to the second radiating segment 12 is 1:3 to 3:1. The radiator 10 also includes a first free end A, a connection point B, a first ground point C, a feed point D, and a second free end E. The connection point B is the connection between the first radiating segment 11 and the second radiating segment 12. The first free end A is the end of the first radiating segment 11 furthest from the connection point B. The second free end E is the end of the second radiating segment 12 furthest from the connection point B. The length between the first ground point C and the connection point B is less than or equal to 1 / 16 of the wavelength of the second frequency band. The distance between the feed point D and the first ground point C is less than 1 / 16 of the wavelength of the second frequency band. The signal source 30 is electrically connected to the feed point D. The signal source 30 is used to excite the radiator 10 to form a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. The first resonant mode forms a first resonant current between the first free end A and the first ground point C, which returns to ground through the first ground point C. The first resonant mode forms a second resonant current between the second free end E and the first ground point C, which returns to ground through the first ground point C. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end A and the second free end E. The resonant current of the second resonant mode includes a third resonant current located between the first free end A and the connection point B and a fourth resonant current located between the connection point B and the second free end E. The third resonant current and the fourth resonant current form a circularly polarized wave.

[0157] The device 600 includes a control module 610. The control module 610 is used to control the ratio of the third resonant current of the first radiation segment 11 to the fourth resonant current of the second radiation segment 12, thereby controlling the main radiation direction of the circularly polarized wave. For a detailed implementation, please refer to step S100 described above.

[0158] Please see Figure 30 This application also provides an electronic device 1000, including a memory 700 and a processor 800. The memory 700 is used to store computer programs, and the processor 800 is used to call and run the computer programs stored in the memory 700 to execute the circularly polarized wave modulation method described in any of the above embodiments. The processor 800 includes the control circuit 50 described above, or is used to control the control circuit 50 described above.

[0159] The memory 700 can be a separate device independent of the processor 800, or it can be integrated into the processor 800.

[0160] It should be understood that the processor 800 in this application embodiment may be an integrated circuit chip with signal processing capabilities. In implementation, each step S of the above method embodiment can be completed by the integrated logic circuitry in the hardware of the processor 800 or by instructions in software form. The processor 800 may be a general-purpose processor 800, a digital signal processor 800 (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps S, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor 800 may be a microprocessor 800, or it may be any conventional processor 800, etc. Step S of the method disclosed in the embodiments of this application can be directly manifested as execution by the hardware decoding processor 800, or execution by a combination of hardware and software modules in the decoding processor 800. The software module can reside in a random access memory 700, flash memory, read-only memory 700, programmable read-only memory 700, electrically erasable programmable memory 700, registers, or other mature storage media in the art. This storage medium is located in memory 700, and the processor 800 reads information from memory 700 and, in conjunction with its hardware, completes the steps of the above method.

[0161] It is understood that the memory 700 in the embodiments of this application can be a volatile memory 700 or a non-volatile memory 700, or may include both volatile and non-volatile memory 700. The non-volatile memory 700 can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory 700 can be a random access memory (RAM) 700, which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). It should be noted that the memory 700 of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory 700.

[0162] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. An electronic device, characterized in that, Includes an antenna assembly, the antenna assembly comprising: A radiator includes a first radiating segment and a second radiating segment connected by a bend; the radiator further includes a first free end, a connection point, a first grounding point, a feed point, and a second free end, wherein the connection point is the junction between the first radiating segment and the second radiating segment, the first free end is the end of the first radiating segment away from the connection point, and the second free end is the end of the second radiating segment away from the connection point; the length between the first grounding point and the connection point is less than or equal to 1 / 16 wavelength of the second frequency band, and the distance between the feed point and the first grounding point is less than 1 / 16 wavelength of the second frequency band; and A signal source electrically connected to the feed point is used to excite the radiator to form a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. The first resonant mode forms a first resonant current between the first free end and the first ground point and returns to ground through the first ground point. The first resonant mode forms a second resonant current between the second free end and the first ground point and returns to ground through the first ground point. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third resonant current and the fourth resonant current are used to form a circularly polarized wave. The radiation direction of the circularly polarized wave is related to the length ratio of the first radiation segment and the second radiation segment.

2. The electronic device as claimed in claim 1, characterized in that, The electronic device includes a display screen, a frame, and a back cover connected in sequence. The frame includes a top edge, a first side edge, a bottom edge, and a second side edge connected in sequence. A first radiating segment is disposed on the first side edge, and a second radiating segment is disposed on the top edge. The third resonant current and the fourth resonant current form a right-hand circularly polarized wave on the side where the display screen of the electronic device is located, and the third resonant current and the fourth resonant current form a left-hand circularly polarized wave that is mirror-symmetrical to the right-hand circularly polarized wave on the side where the back cover of the electronic device is located.

3. The electronic device as described in claim 2, characterized in that, The electronic device also includes a reference ground plane, which is disposed within the space surrounded by the frame. The first grounding point is electrically connected to the reference ground plane. Both the first grounding point and the feed point are located in the second radiation segment. The second resonant mode forms a transverse ground current on the reference ground plane. The angle between the main radiation direction of the circularly polarized wave formed by the third resonant current and the fourth resonant current and the preset direction is less than the preset angle. The preset direction is the direction from the bottom edge to the top edge.

4. The electronic device as claimed in claim 3, characterized in that, The ratio of the length of the first radiation segment to the length of the second radiation segment is 1:3 to 3:

1.

5. The electronic device as claimed in claim 4, characterized in that, The length ratio of the first radiation segment to the second radiation segment is 1:1, the angle between the main radiation direction of the circularly polarized wave and the preset direction is 60°, and the range covered by the circularly polarized wave in the preset direction is greater than or equal to 45°.

6. The electronic device as claimed in claim 4, characterized in that, The ratio of the length of the first radiation segment to the length of the second radiation segment is less than 1:1, the angle between the main radiation direction of the circularly polarized wave and the preset direction is less than 55°, and the range covered by the circularly polarized wave in the preset direction is greater than or equal to 90°.

7. The electronic device as claimed in claim 3, characterized in that, The main radiation direction of the circularly polarized wave formed by the third resonant current and the fourth resonant current is related to the ratio of the current intensity on the first radiation segment and the second radiation segment.

8. The electronic device as claimed in claim 7, characterized in that, The antenna assembly further includes a switching circuit, one end of which is connected to the first grounding point and the other end of which is grounded. The switching circuit is used to adjust the ratio of the current intensity on the first radiating segment to the current intensity on the second radiating segment.

9. The electronic device as claimed in claim 8, characterized in that, The antenna assembly also includes a control circuit electrically connected to the switching circuit. The control circuit is used to control the switching circuit to adjust the ratio of the current intensity on the first radiation segment to the current intensity on the second radiation segment based on the received intensity of the circularly polarized wave being less than a preset intensity.

10. The electronic device as claimed in claim 8, characterized in that, The resonant current distribution of the second resonant mode includes a first current region, a second current region, and a third current region arranged sequentially. The second current region has a current intensity point. The current intensity of the first current region is less than that of the second current region. The current intensity of the third current region is less than that of the second current region. The first grounding point is located in the first current region or the second current region. The switching circuit has a ground short-circuit state for the second frequency band and at least one impedance state. The switching circuit is used to adjust the input impedance of the first ground point by switching the state, so as to adjust the ratio of the current intensity on the first radiation segment to the current intensity on the second radiation segment.

11. The electronic device as claimed in claim 10, characterized in that, The switching circuit includes a switching unit, a ground short-circuit branch, and at least one impedance branch. One end of the switching unit is electrically connected to the first grounding point, and the other end of the switching unit can be selectively connected to at least one of the ground short-circuit branch and the at least one impedance branch. The at least one impedance branch includes at least one ground inductive branch and / or at least one ground capacitive branch that is in an impedance state to the second frequency band.

12. The electronic device as claimed in claim 10, characterized in that, The length between the first grounding point and the first free end is less than the length between the first grounding point and the second free end; When the switching circuit is switched to the ground short-circuit state, the ratio of the current intensity on the first radiation segment to the current intensity on the second radiation segment is a first ratio, the angle between the main radiation direction of the circularly polarized wave and the preset direction is a first angle, the first angle is less than 55°, and the antenna assembly can communicate with the circularly polarized wave transceiver through the right-hand circularly polarized wave. When the switching circuit switches to the impedance state, the ratio of the current intensity on the first radiation segment to the current intensity on the second radiation segment is a second ratio, which is greater than the first ratio. The angle between the main radiation direction of the circularly polarized wave and the preset direction is a second angle, which is greater than 100°. The antenna assembly can communicate with the circularly polarized wave transceiver via the left-hand circularly polarized wave.

13. The electronic device according to any one of claims 1-12, characterized in that, The first resonant mode forms a 1 / 4 wavelength mode of the first frequency band between the second free end and the first ground point. The intensity of the second resonant current is greater than the intensity of the first resonant current. The center frequency of the first frequency band is less than the center frequency of the second frequency band, and the difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than 1 GHz. The first frequency band and the second frequency band form a continuous frequency band.

14. The electronic device according to any one of claims 1-12, characterized in that, The antenna assembly further includes a first parasitic radiator, which includes a third free end and a second grounding point. The third free end is disposed opposite to the second free end, and the second grounding point is grounded. The second resonant mode also forms a fifth resonant current in the same direction as the fourth resonant current at the third free end and the second grounding point; The radiator and the first parasitic radiator also form a third resonant mode supporting the third frequency band under the excitation of the signal source. The third resonant mode forms a sixth resonant current between the first grounding point and the second free end. The third resonant mode forms a seventh resonant current between the third free end and the second grounding point. The current intensity of the seventh resonant current is greater than that of the sixth resonant current. The direction of the seventh resonant current is opposite to that of the sixth resonant current. The center frequency of the third frequency band is greater than that of the second frequency band.

15. The electronic device according to any one of claims 1-12, characterized in that, The antenna assembly further includes a second parasitic radiator, which includes a fourth free end and a third grounding point. The fourth free end is disposed opposite to the first free end, and the third grounding point is grounded. The second resonant mode also forms an eighth resonant current in the same direction as the third resonant current at the fourth free end and the third grounding point; The radiator and the second parasitic radiator also form a fourth resonant mode supporting the fourth frequency band under the excitation of the signal source. The fourth resonant mode forms a ninth resonant current between the first grounding point and the first free end, and a tenth resonant current between the fourth free end and the third grounding point. The current intensity of the tenth resonant current is greater than that of the ninth resonant current, and the direction of the tenth resonant current is opposite to that of the ninth resonant current. The center frequency of the fourth frequency band is greater than that of the second frequency band.

16. A method for controlling circularly polarized waves, applied to electronic devices, characterized in that, The electronic device includes an antenna assembly, which includes a radiator and a signal source. The radiator includes a first radiating segment and a second radiating segment that are bent and connected. The radiator also includes a first free end, a connection point, a first grounding point, a feed point, and a second free end. The connection point is the junction between the first radiating segment and the second radiating segment. The first free end is the end of the first radiating segment away from the connection point, and the second free end is the end of the second radiating segment away from the connection point. The length between the first grounding point and the connection point is less than or equal to 1 / 16 of the wavelength of the second frequency band, and the distance between the feed point and the first grounding point is less than 1 / 16 of the wavelength of the second frequency band. The signal source is electrically connected to the feed point. The signal source is used to excite the radiator to form a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band. The first resonant mode forms a first resonant current between the first free end and the first ground point and returns to ground through the first ground point. The first resonant mode forms a second resonant current between the second free end and the first ground point and returns to ground through the first ground point. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third resonant current and the fourth resonant current are used to form a circularly polarized wave. The method includes: The ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment is adjusted to control the main radiation direction of the circularly polarized wave.

17. The method as described in claim 16, characterized in that, The antenna assembly further includes a switching circuit, one end of which is connected to the first grounding point, and the other end of which is grounded. The switching circuit has a ground short-circuit state for the second frequency band and at least one impedance state. Before adjusting the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment, the method further includes: Compare the intensity of the circularly polarized wave received by the antenna assembly with a preset intensity; When the received strength of the circularly polarized wave is less than the preset strength, the switching circuit is controlled to switch from the ground short-circuit state to the impedance state.

18. The method as described in claim 17, characterized in that, The adjustment of the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment includes: By reducing the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment, the angle between the main radiation direction of the circularly polarized wave and a preset direction is reduced. The preset direction is the direction from the bottom edge of the electronic device to the top edge of the electronic device; or... Increasing the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment increases the angle between the main radiation direction of the circularly polarized wave and a preset direction, where the preset direction is the direction from the bottom edge of the electronic device to the top edge of the electronic device.

19. The method as described in claim 18, characterized in that, Reducing the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment includes: The impedance of the control switching circuit is reduced to decrease the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment; or, The increase in the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment includes: The impedance of the control switching circuit is increased to increase the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment.

20. A device for controlling a circularly polarized wave, applied to electronic devices, characterized in that, The electronic device includes an antenna assembly, which includes a radiator and a signal source. The radiator includes a first radiating segment and a second radiating segment that are bent and connected. The radiator also includes a first free end, a connection point, a first grounding point, a feed point, and a second free end. The connection point is the junction between the first radiating segment and the second radiating segment. The first free end is the end of the first radiating segment away from the connection point, and the second free end is the end of the second radiating segment away from the connection point. The length between the first grounding point and the connection point is less than or equal to 1 / 16 of the wavelength of the second frequency band, and the distance between the feed point and the first grounding point is less than 1 / 16 of the wavelength of the second frequency band. The signal source is electrically connected to the feed point. The signal source is used to excite the radiator to form a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band. The first resonant mode forms a first resonant current between the first free end and the first ground point and returns to ground through the first ground point. The first resonant mode forms a second resonant current between the second free end and the first ground point and returns to ground through the first ground point. The second resonant mode is a half-wavelength mode of the second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current located between the first free end and the connection point and a fourth resonant current located between the connection point and the second free end. The third resonant current and the fourth resonant current are used to form a circularly polarized wave. The device includes: The control module is used to control the ratio of the third resonant current in the first radiation segment to the fourth resonant current in the second radiation segment, thereby controlling the main radiation direction of the circularly polarized wave.

21. An electronic device, characterized in that, The device includes a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the method as described in any one of claims 16 to 19.

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