Electronic device

Abstract

The invention discloses electronic equipment. A first radiator comprises a first end and a second end which are oppositely arranged, and a connecting point and a feeding point which are arranged between the first end and the second end; the signal source is electrically connected with the feeding point; the second radiator comprises a third end and a fourth end which are oppositely arranged, the third end and the second end are coupled through a gap, and the fourth end is grounded; one end of the first switch circuit is electrically connected with the connection point, and the other end of the first switch circuit is grounded; one end of the second switch circuit is electrically connected with the first end, and the other end of the second switch circuit is grounded; the working modes of the antenna assembly comprise a first working mode and a second working mode, and in the first working mode, the first switching circuit is in an on state, and the second switching circuit is in an off state; and in the second working mode, the first switching circuit is in an off state, and the second switching circuit is in an on state. According to the electronic equipment, the antenna assembly keeps good antenna performance.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an electronic device. Background Art

[0002] An electronic device is provided with an antenna for communication. The environment of the electronic device is changeable, which causes the environment faced by the antenna component to also be changeable. For example, the antenna component may be held by the hand, which will cause the performance of the antenna component to degrade. Therefore, how to design an electronic device with an antenna component that maintains good antenna performance has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an electronic device with an antenna assembly that maintains good antenna performance.

[0004] The present application provides an electronic device, including an antenna assembly, wherein the antenna assembly includes:

[0005] A first radiator, the first radiator comprising a first end and a second end arranged opposite to each other, and a connection point and a feeding point arranged between the first end and the second end;

[0006] A signal source, the signal source being electrically connected to the feeding point;

[0007] A second radiator, the second radiator comprising a third end and a fourth end arranged opposite to each other, the third end and the second end are coupled via a gap, and the fourth end is grounded;

[0008] a first switch circuit, one end of the first switch circuit being electrically connected to the connection point, and the other end of the first switch circuit being grounded; and

[0009] a second switch circuit, wherein one end of the second switch circuit is electrically connected to the first end, and the other end of the second switch circuit is grounded;

[0010] The working modes of the antenna component include a first working mode and a second working mode. In the first working mode, the first switch circuit is in an on state, and the second switch circuit is in an off state; in the second working mode, the first switch circuit is in an off state, and the second switch circuit is in an on state.

[0011] The electronic device provided in the embodiment of the present application is designed such that the first radiator includes a first end and a second end which are arranged opposite to each other, and a connection point and a feeding point which are arranged between the first end and the second end, the signal source is electrically connected to the feeding point, and the second radiator includes a third end and a fourth end which are arranged opposite to each other, the third end is coupled to the second end through a gap, the fourth end is grounded, one end of the first switch circuit is electrically connected to the connection point, the other end of the first switch circuit is grounded, one end of the second switch circuit is electrically connected to the first end, and the other end of the second switch circuit is grounded. Thus, the working mode of the antenna component includes at least a first working mode and a second working mode. In the first working mode, the first switch circuit is in a conducting state, and the second switch circuit is in a disconnected state, and the antenna component is a T+L type antenna; in the second working mode, the first switch circuit is in a disconnected state, and the second switch circuit is in a conducting state, and the antenna component is an IFA+L type antenna. Thus, the antenna component constitutes different antenna forms in different working modes, has different current distributions, and can maintain good antenna performance in a variety of environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0013] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0014] Figure 2 is a schematic diagram of the structural decomposition of an electronic device provided in an embodiment of the present application;

[0015] Figure 3 It is a structural schematic diagram of an antenna assembly provided by a first embodiment of the present application on an electronic device;

[0016] Figure 4 is a structural schematic diagram of an antenna assembly provided in the first embodiment of the present application;

[0017] Figure 5 is a schematic structural diagram of an antenna assembly provided by a first embodiment of the present application in a first working state;

[0018] Figure 6 is a simplified schematic diagram of the antenna assembly provided by the first embodiment of the present application in a first working state;

[0019] Figure 7 is a structural schematic diagram of the antenna assembly provided by the first embodiment of the present application in a second working state;

[0020] Figure 8 is a simplified schematic diagram of the antenna assembly provided by the first embodiment of the present application in the second working state;

[0021] Fig. 9 This is a schematic diagram of the structure of the first type of proximity sensor provided in the antenna assembly provided by the first embodiment of the present application;

[0022] Fig.10 This is a schematic diagram of the structure of the first type of proximity sensor provided in the antenna assembly provided by the first embodiment of the present application;

[0023] Fig.11 is a current distribution diagram of a first resonant mode of an antenna assembly provided by a first embodiment of the present application;

[0024] Fig.12 is a current distribution diagram of the second resonance mode of the antenna assembly provided by the first embodiment of the present application;

[0025] Fig.13 is a current distribution diagram of the third resonant mode of the antenna assembly provided by the first embodiment of the present application;

[0026] Fig.14 is a current distribution diagram of the fourth resonance mode of the antenna assembly provided by the first embodiment of the present application;

[0027] Fig.15 is a current distribution diagram of the fifth resonant mode of the antenna assembly provided by the first embodiment of the present application;

[0028] Fig.16 is a current distribution diagram of the sixth resonant mode of the antenna assembly provided by the first embodiment of the present application;

[0029] Fig.17 is a current distribution diagram of the seventh resonance mode of the antenna assembly provided by the first embodiment of the present application;

[0030] Fig.18 is a structural schematic diagram of an antenna assembly provided by a first embodiment of the present application provided with a first tuning circuit in a first working mode;

[0031] Fig.19 is a structural schematic diagram of a first tuning circuit provided in an embodiment of the present application;

[0032] Fig. 20 It is a structural schematic diagram of an antenna assembly provided by the first embodiment of the present application having a second tuning circuit in a second working mode;

[0033] Fig.21 is a schematic diagram of the structure of a second tuning circuit provided in an embodiment of the present application;

[0034] Fig. 22 It is an S parameter curve and an efficiency curve diagram of the antenna assembly provided by the first embodiment of the present application in the first working mode;

[0035] Fig.23 is a structural schematic diagram of an antenna assembly provided in a second embodiment of the present application on an electronic device;

[0036] Fig.24 It is an S parameter curve and an efficiency curve diagram of the antenna assembly provided by the first embodiment of the present application in the second working mode;

[0037] Fig.25 is a hot spot distribution diagram of the antenna assembly provided by the first embodiment of the present application in the first working mode;

[0038] Fig.26 It is a structural schematic diagram of an antenna assembly disposed on the bottom edge of an electronic device in a first working mode provided by a first embodiment of the present application.

[0039] Description of the structural symbols of the accompanying drawings:

[0040] Electronic device 1000; antenna assembly 100; display screen 200; middle frame 300; back cover 400; middle plate 310; frame 320; top edge 321; bottom edge 322; first side edge 323; second side edge 324; first radiator 10; second radiator 20; signal source 30; first switching circuit 40; second switching circuit 50; first end A; second end D; connection point B; feeding point C; third end E; fourth end F; reference floor 60; first matching circuit M1; first switching unit K1; second switching unit K2; proximity detector 70; detection electrode 71; detection circuit 72; third radiator 80; fifth end G; sixth end H; first tuning circuit T1; first tuning branch T11; second tuning circuit T2; second tuning branch T12. DETAILED DESCRIPTION

[0041] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only some embodiments, not all embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without paying creative work belong to the protection scope of the present application. The following implementation methods can be combined with each other when they are not contradictory, and the implementation methods after combination also belong to the protection scope of the present application.

[0042] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0043] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0044] See also Figure 1 , Figure 1 The following is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application. The electronic device 1000 includes but is not limited to a mobile phone, a tablet computer, a laptop computer, a computer, a wearable device, a drone, a robot, a digital camera, and other devices with communication functions. The present embodiment of the present application is described using a mobile phone as an example, and other electronic devices may refer to this embodiment.

[0045] See also Figure 2 , the electronic device 1000 includes an antenna assembly 100.

[0046] See also Figure 2, taking the electronic device 1000 as a mobile phone as an example, the working environment of the antenna assembly 100 is illustrated. The electronic device 1000 includes a display screen 200, a middle frame 300 and a back cover 400 arranged in sequence along the thickness direction. Among them, the middle frame 300 includes a middle plate 310 and a frame 320 surrounding the side of the middle plate 310. Of course, in other embodiments, the electronic device 1000 may not have a middle plate 310. The display screen 200, the middle plate 310 and the back cover 400 are stacked in sequence, and a receiving space is formed between the display screen 200 and the middle plate 310, and between the middle plate 310 and the back cover 400 to accommodate components such as a main board, a camera module, a receiver module, a battery, and various sensors. One side of the frame 320 is surrounded by the edge of the display screen 200, and the other side of the frame 320 is surrounded by the edge of the back cover 400 to form a complete appearance structure of the electronic device 1000. In this embodiment, the frame 320 and the middle plate 310 are an integral structure, and the frame 320 and the back cover 400 may be separate structures. The above is the working environment of the antenna assembly 100 taking a mobile phone as an example, but the antenna assembly 100 of the present application is not limited to the above working environment.

[0047] See also Figure 3 The frame 320 includes a top edge 321 and a bottom edge 322 that are arranged opposite to each other, and a first side edge 323 and a second side edge 324 that are connected to the top edge 321 and the bottom edge 322. The top edge 321 is the side that is away from the ground when the user holds the electronic device 1000, and the bottom edge 322 is the side that is facing the ground when the user holds the electronic device 1000.

[0048] See also Figure 4 The first embodiment of the present application provides an antenna assembly 100, wherein the antenna assembly 100 includes a first radiator 10, a second radiator 20, a signal source 30, a first switching circuit 40 and a second switching circuit 50.

[0049] The first radiator 10 is a port for the antenna assembly 100 to send and receive radio frequency signals. The radio frequency signal is transmitted in the air medium in the form of an electromagnetic wave signal. The present application does not specifically limit the material of the first radiator 10. Optionally, the material of the first radiator 10 is a conductive material, including but not limited to conductive materials such as metals and alloys.

[0050] The present application does not specifically limit the shape of the first radiator 10. For example, the shape of the first radiator 10 includes but is not limited to a strip, a sheet, a rod, a coating, a film, and the like. Figure 3The first radiator 10 shown is only an example and does not limit the shape of the first radiator 10 provided in the present application. In the present embodiment, the first radiators 10 are all in the shape of strips. The present application does not limit the extension trajectory of the first radiator 10. Optionally, the first radiator 10 may extend along a straight line, or along a curve, or along a bend line. In the present embodiment, the first radiator 10 is in the shape of a straight line. In other embodiments, the first radiator 10 may also extend along a trajectory such as a bend line. The above-mentioned first radiator 10 may be a line with uniform width on the extension trajectory, or may be a strip with unequal width such as a gradient width and a widened area.

[0051] The present application does not specifically limit the form of the first radiator 10. Optionally, the form of the first radiator 10 includes but is not limited to a metal frame 320, a metal frame (metal insert) embedded in the plastic frame 320, a metal first radiator 10 located in or on the surface of the frame 320, a flexible circuit board antenna formed on a flexible circuit board (Flexible Printed Circuitboard, FPC), a laser direct structured antenna by laser direct structure (Laser Direct Structuring, LDS), a printed direct structured antenna by printing direct structure (Print Direct Structuring, PDS), a conductive sheet antenna (such as a metal bracket antenna), etc.

[0052] See also Figure 4 The first radiator 10 includes a first end A and a second end D that are arranged opposite to each other, and a connection point B and a feeding point C that are arranged between the first end A and the second end D. The specific positions of the connection point B and the feeding point C are not limited in the present application.

[0053] The second end D is an end that is disconnected from other structures. The second end D can also be called a free end. The first end A can be disconnected from or connected to a structure outside the first radiator 10. The present application does not specifically limit the position of the connection point B and the feeding point C between the first end A and the second end D.

[0054] In an optional implementation, the connection point B and the feeding point C are located at the same point. In this case, the feeding point C is electrically connected to the signal source 30 through a matching circuit, a part of the matching circuit is connected in series between the feeding point C and the signal source 30, and the other part is connected to the ground through a capacitor and / or an inductor device, so that the feeding point C is electrically connected to the signal source 30, and the connection point B is used for grounding.

[0055] In another optional embodiment, the feeding point C is close to the center position of the first end A and the second end D. For example, the distance between the feeding point C and the center position of the first end A and the second end D is less than 1 / 4 of the total length of the first radiator 10. The feeding point C is electrically connected to the signal source 30, or the feeding point C is electrically connected to the signal source 30 through a matching circuit. The connection point B is located between the first end A and the feeding point C or between the second end D and the feeding point C, and the connection point B is set close to the feeding point C, and the connection point B is used for grounding.

[0056] The following embodiments are described by taking the case where the connection point B is located between the feeding point C and the first end A as an example.

[0057] The signal source 30 is electrically connected to the feeding point C. The first radiator 10 is a main radiator, and the second radiator 20 is a parasitic radiator.

[0058] The signal source 30 includes but is not limited to a radio frequency transceiver chip, etc. The signal source 30 is used to provide a radio frequency excitation current, which, after being transmitted to the first radiator 10, can excite the first radiator 10 to generate a resonant current and form a resonant mode to cover a radio frequency band for electromagnetic wave transceiver.

[0059] In the embodiment of the present application, the signal source 30 is disposed on the mainboard. The electrical connection method between the signal source 30 and the feeding point C includes but is not limited to direct welding, or indirect connection through coaxial lines, microstrip lines, conductive springs, conductive glue, coupling connection, etc. Specifically, the signal source 30 is electrically connected to the feeding point C through a feeding spring (conductive spring) disposed on the mainboard.

[0060] The second radiator 20 may refer to the first radiator 10. In this embodiment, the first radiator 10 and the second radiator 20 are taken as metal inserts of the frame 320 of the electronic device 1000 as an example.

[0061] See also Figure 4 , the second radiator 20 includes a third end E and a fourth end F that are relatively arranged, and the third end E is coupled to the second end D through a gap. Among them, the third end E is an end that is disconnected from other structures. The third end E can also be called a free end. The fourth end F can be disconnected or connected to the structure outside the second radiator 20. In other words, the second end D and the third end E generate an electric field under an electric signal, and although there is a gap between the second end D and the third end E, current signals can also be transmitted. The fourth end F is grounded. "Grounding" in this embodiment includes direct grounding or indirect grounding. Specifically. The fourth end F is used to electrically connect the reference floor 60.

[0062] See also Figure 4 , the antenna assembly 100 also includes a first matching circuit M1.

[0063] The first matching circuit M1 is electrically connected between the signal source 30 and the feeding point C. The first matching circuit M1 includes at least one of a capacitor and an inductor. The first matching circuit M1 helps the signal source 30 to excite a first resonant mode on the first radiator 10 by adjusting the impedance matching between the port of the signal source 30 and the port of the first radiator 10.

[0064] Specifically, the first matching circuit M1 includes but is not limited to a capacitor, or an inductor, a series device of a capacitor and an inductor, a parallel device of a capacitor and an inductor, the above-mentioned series device in parallel with a capacitor, the above-mentioned series device in parallel with an inductor, two of the above-mentioned series devices in parallel, two of the above-mentioned parallel devices in series, and so on.

[0065] The second end D of the first radiator 10 and the third end E of the second radiator 20 are coupled, that is, the first radiator 10 and the second radiator 20 form a mouth-to-mouth antenna, and the excitation signal excited by the signal source 30 can be transmitted to the second radiator 20, that is, both the first radiator 10 and the second radiator 20 can be used by the signal source 30. After the first radiator 10 and the second radiator 20 are coupled, the electrical length of the first radiator 10 and the second radiator 20 can be reduced, thereby reducing the overall size of the first radiator 10 and the second radiator 20.

[0066] One end of the first switch circuit 40 is electrically connected to the connection point B, and the other end of the first switch circuit 40 is grounded.

[0067] The first switch circuit 40 is used to be connected to or disconnected from the reference ground 60. In other words, the connection point B of the first radiator 10 is connected to or disconnected from the reference ground 60.

[0068] See also Figure 5 The first switch circuit 40 at least includes a first switch unit K1. The first switch unit K1 has an on state or an open state. The first switch unit K1 includes but is not limited to at least one of a field effect tube, a triode, a transistor, and the like.

[0069] One end of the second switch circuit 50 is electrically connected to the first end A, and the other end of the second switch circuit 50 is grounded.

[0070] The second switch circuit 50 is used to be connected to or disconnected from the reference ground 60. In other words, the connection point B of the second radiator 20 is connected to or disconnected from the reference ground 60.

[0071] See also Figure 6The second switch circuit 50 at least includes a second switch unit K2. The second switch unit K2 has an on state or an open state. The second switch unit K2 includes but is not limited to at least one of a field effect tube, a triode, a transistor, and the like.

[0072] The working mode of the antenna assembly 100 at least includes a first working mode and a second working mode.

[0073] See also Figure 5 and Figure 6 , in the first working mode, the first switch circuit 40 is in the on state, and the second switch circuit 50 is in the off state. Specifically, the connection point B of the first radiator 10 is electrically connected to the reference floor 60, and the first end A of the first radiator 10 is disconnected from the reference floor 60. At this time, the first end A of the first radiator 10 is equivalent to a free end. The first radiator 10 and the signal source 30 form a T-shaped antenna. One end of the second radiator 20 is a free end, and the other end is grounded, so the second radiator 20 is roughly L-shaped. The first radiator 10, the signal source 30 and the second radiator 20 form a T+L-shaped antenna.

[0074] Optionally, the connection point B may be directly grounded or may be grounded through a third matching circuit M3 , wherein the third matching circuit M3 may be a capacitor or an inductor to adjust the electrical length of the first radiator 10 .

[0075] See also Figure 7 and Figure 8 , in the second working mode, the first switch circuit 40 is in an off state, and the second switch circuit 50 is in an on state. Specifically, the connection point B of the first radiator 10 is disconnected from the reference floor 60, and the first end A of the first radiator 10 is electrically connected to the reference floor 60. At this time, the first end A of the first radiator 10 is equivalent to the ground end. The first radiator 10 and the signal source 30 form an IFA antenna. One end of the second radiator 20 is a free end, and the other end is grounded, so the second radiator 20 is roughly L-shaped. The first radiator 10, the signal source 30 and the second radiator 20 form an IFA+L-shaped antenna.

[0076] Of course, the working mode of the antenna assembly 100 can also include a third working mode and a fourth working mode. Among them, the third working mode is that the first switch circuit 40 and the second switch circuit 50 are both in the on state. In this embodiment, when the working mode of the antenna assembly 100 works in the first working mode and the second working mode, it can cover the target frequency band, wherein the target frequency band includes, for example, the MHB frequency band. In the third working mode, the frequency band supported by the antenna assembly 100 can be switched to the UHB frequency band. For example, in the first working mode and the second working mode, the antenna assembly 100 can support the B1, B3, B40, and B41 frequency bands. In the third working mode, the antenna assembly 100 can support the N78 frequency band. In this embodiment, there is basically no current between the first end A of the first radiator 10 and the connection point B. In this embodiment, another N78 antenna adjacent to the first end A of the first radiator 10 can also be provided on the frame 320 of the electronic device 1000. At this time, the first end A of the first radiator 10 and the connection point B can be used as a signal isolation device for two N78 antennas. Furthermore, two other N78 antennas may be provided on the frame 320 of the electronic device 1000 to form a 4*4 mimo antenna group of N78, or to form multiple N78 antennas with intelligent switching.

[0077] The fourth working mode is that both the first switch circuit 40 and the second switch circuit 50 are in the disconnected state. The antenna assembly 100 can be switched to a dipole antenna to form a new current distribution.

[0078] Generally, the free end is much more sensitive to hand shielding than the grounded end. During the hand holding process, the hand holding the free end has a greater impact on the current distribution and resonance mode of the antenna assembly 100, causing frequency deviation or even frequency band unsupportable problems.

[0079] The antenna assembly 100 provided in the present application can change its antenna form by switching the states of the first switch circuit 40 and the second switch circuit 50, so as to form different resonant modes, and change the grounding state of the end, so as to change the sensitivity of the end to the hand blocking of the subject to be measured. When the working mode of the antenna assembly 100 is switched from the first working mode to the second working mode, the first end A of the antenna assembly 100 is switched from the free end to the ground end, and the form of the antenna assembly 100 is changed, at least the sensitivity of the first end A of the antenna assembly 100 to hand holding is changed. For example, when the position where the first end A is located is held by hand, the antenna assembly 100 can work in the second working mode, so that the antenna assembly 100 can maintain good antenna performance in a variety of environments.

[0080] The electronic device 1000 provided in the embodiment of the present application is designed such that the first radiator 10 includes a first end A and a second end D which are arranged opposite to each other, and a connection point B and a feeding point C which are arranged between the first end A and the second end D, the signal source 30 is electrically connected to the feeding point C, the second radiator 20 includes a third end E and a fourth end F which are arranged opposite to each other, the third end E and the second end D are coupled through a gap, the fourth end F is grounded, one end of the first switch circuit 40 is electrically connected to the connection point B, the other end of the first switch circuit 40 is grounded, one end of the second switch circuit 50 is electrically connected to the first end A, and the other end of the second switch circuit 50 is grounded, so that the working mode of the antenna component 100 includes at least a first working mode and a second working mode, in the first working mode, the first switch circuit 40 is in an on state, and the second switch circuit 50 is in an off state, and the antenna component 100 is a T+L type antenna. In the second working mode, the first switch circuit 40 is in the disconnected state, and the second switch circuit 50 is in the on state. The antenna component 100 is an IFA+L-type antenna. In this way, the antenna component 100 constitutes different antenna forms in different working modes and has different current distributions, and can maintain good antenna performance in a variety of environments.

[0081] An example of a working scenario of the electronic device 1000 is provided below in conjunction with the accompanying drawings. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0082] See also Fig. 9 The electronic device 1000 further includes a proximity detector 70. The proximity detector 70 is electrically connected to the antenna assembly 100. The antenna assembly 100 is configured to switch to the second working mode when the proximity detector 70 detects that the subject to be detected is close to the first end A of the first radiator 10.

[0083] The present application does not specifically limit the proximity detector 70, and the proximity detector 70 is used to detect whether the subject to be tested is close to the antenna assembly 100. Further, the proximity detector 70 is used to detect whether the first end A of the first radiator 10 is blocked by the hand of the subject to be tested.

[0084] When the proximity detector 70 detects that the hand of the subject to be tested covers the first end A of the first radiator 10, the antenna assembly 100 switches to the second working mode, thereby increasing the sensitivity of the first end A of the first radiator 10 to the hand and reducing the impact of hand occlusion on the frequency band supported by the antenna assembly 100, thereby ensuring the working efficiency of the antenna assembly 100 in different holding scenarios.

[0085] Optionally, when the proximity detector 70 detects that the distance between the subject to be detected and the first end A of the first radiator 10 is outside the preset distance, the antenna assembly 100 switches to operate in the first operating mode.

[0086] For further information, see Fig. 9 and Fig.10 The proximity detector 70 includes a detection electrode 71 and a detection circuit 72. The detection electrode 71 may be the same structure as the first radiator 10, or the detection electrode 71 is a part of the metal frame 320 and is disposed adjacent to the first end A of the first radiator 10. When designing, the detection electrode 71 is equivalent to a DC signal being in a suspended state. When designing the detection circuit 72, the detection circuit 72 includes a device for isolating AC signals.

[0087] The present application does not limit the frequency band supported by the antenna assembly 100. In other words, the sub-frequency band supported by the antenna assembly 100 belongs to at least one of the LB frequency band (less than 1 GHz), the MHB frequency band (1-3 GHz), the UHB frequency band (greater than 3 GHz), the Wi-Fi frequency band, etc.

[0088] Optionally, the sub-frequency bands that the antenna assembly 100 can cover in the first working mode and the second working mode are the same. For example, the working frequency bands of the antenna assembly 100 in the first working mode and the second working mode include the B3 frequency band, the B1 frequency band, the B39 frequency band, the B40 frequency band, and the B41 frequency band. Or, for example, the working frequency bands of the antenna assembly 100 in the first working mode and the second working mode include the B3 frequency band, the B1 frequency band, and the B39 frequency band.

[0089] Specifically, the antenna assembly 100 can cover the target frequency band in both the first working mode and the second working mode. In other words, the working frequency bands of the antenna assembly 100 in the first working mode and the second working mode are both target frequency bands. The bandwidth of the target frequency band is greater than or equal to 1 GHz. Furthermore, the working frequency bands of the antenna assembly 100 in the first working mode and the second working mode cover 1.5-2.7 GHz. The bandwidth of the working frequency band of the antenna assembly 100 in the first working mode and the second working mode is greater than or equal to 1 GHz.

[0090] The embodiment of the present application switches the working state of the antenna component 100 through the first switching circuit 40 and the second switching circuit 50 to ensure that the antenna component 100 can support a wider bandwidth to form a broadband antenna, and ensure that the antenna component 100 has stable antenna performance even when the first end A of the first radiator 10 is blocked by the hand, thereby maintaining its broadband antenna performance.

[0091] In the first working mode or the second working mode, the first radiator 10 and the second radiator 20 form at least three resonance modes under the excitation of the signal source 30. Specifically, the number of resonance modes formed by the first radiator 10 and the second radiator 20 under the excitation of the signal source 30 includes three, four, etc.

[0092] In the embodiment of the present application, the first radiator 10 and the second radiator 20 generate at least three resonance modes under the excitation signal provided by the signal source 30 to generate multiple resonance modes. The resonance frequencies of the multiple resonance modes are set to be similar so that the frequency band supported by each resonance mode forms a continuous frequency band. For example, the frequency bands supported by the three resonance modes are 1.5-2.1 GHz, 1.5-2.5 GHz, and 2.5-2.8 GHz, respectively, forming a continuous frequency band of 1.5-2.8 GHz.

[0093] The following is an illustrative description of the resonant mode of the antenna assembly 100 in the first working mode with reference to the accompanying drawings.

[0094] See also Fig.11 In the first working mode, the first radiator 10 and the second radiator 20 form a first resonance mode supporting the first frequency band under the excitation of the signal source 30. In other words, in the first working mode, the excitation signal provided by the signal source 30 forms a resonance of the first frequency band on the first radiator 10 and the second radiator 20, and this resonance is named as the first resonance mode in the present application. The characteristics of this resonance are: the resonant current of the first resonance mode includes a first sub-resonant current formed between the first end A and the connection point B, and a second sub-resonant current formed between the second end D and the connection point B. The current intensity of the first sub-resonant current is greater than the current intensity of the second sub-resonant current. The mode of the first sub-resonant current is a 1 / 4 wavelength mode of the first frequency band. The direction of the first sub-resonant current is opposite to that of the second sub-resonant current.

[0095] Specifically, the resonant current of the first resonant mode flows from the reference floor 60 through the second switching circuit 50 and the connection point B to the first end A and the second end D. Of course, due to the periodicity of the current, the direction of the resonant current of the first resonant mode may also be opposite to the above current direction. The portion of the first sub-resonant current between the first end A and the connection point B in the resonant current of the first resonant mode is a strong current. The first sub-resonant current makes the main contribution to the radiation of the first resonant mode, and the current mode of the first sub-resonant current also determines the size of the frequency band supported by the first resonant mode. For example, the current mode of the first sub-resonant current is a 1 / 4 wavelength mode from the connection point B to the first end A. In other words, the electrical length from the connection point B to the first end A is close to 1 / 4 wavelength of the first frequency band. The electrical length described in the present application can satisfy the following formula:

[0096]

[0097] 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 free space.

[0098] In this implementation, the center frequency of the first frequency band is 1.8 GHz, and the first frequency band is an effective frequency band where the return loss corresponding to the first resonance mode is less than -3 dB, or less than -4 dB, or less than -5 dB. In this implementation, the first frequency band is 1.5-2.1 GHz, which can effectively support the B3 frequency band, the B1 frequency band, and the B39 frequency band.

[0099] See also Fig.12 In the first working mode, the first radiator 10 and the second radiator 20 also form a second resonance mode supporting the second frequency band under the excitation of the signal source 30. In other words, in the first working mode, the excitation signal provided by the signal source 30 also forms a resonance of the second frequency band on the first radiator 10 and the second radiator 20, and the resonance is named as the second resonance mode in the present application. The characteristics of this resonance are: the resonance current of the second resonance mode includes a third sub-resonance current formed between the first end A and the second end D, and a fourth sub-resonance current formed between the third end E and the fourth end F. The current intensity of the third sub-resonance current between the connection point B and the second end D is greater than the current intensity of the third sub-resonance current between the connection point B and the first end A. The current intensity of the third sub-resonance current between the connection point B and the second end D is greater than the current intensity of the fourth sub-resonance current. The mode of the third sub-resonance current is a 1 / 2 wavelength mode of the second frequency band. The direction of the third sub-resonance current is the same as that of the fourth sub-resonance current.

[0100] Specifically, the resonant current of the second resonant mode flows from the first end A to the second end D, and flows from the third end E of the second radiator 20 to the fourth end F through the coupling gap, and then goes to the ground through the fourth end F. Of course, due to the periodicity of the current, the current direction of the resonant current of the second resonant mode can also be opposite to the current direction above. The part of the resonant current of the second resonant mode between the connection point B and the second end D is a strong current. The resonant current between the connection point B and the second end D makes the main contribution to the radiation of the second resonant mode, and the current mode of the resonant current between the connection point B and the second end D also determines the frequency band supported by the second resonant mode. The mode of the third sub-resonant current is the 1 / 2 wavelength mode of the second frequency band. Among them, the current mode of the resonant current between the connection point B and the second end D is the 1 / 4 wavelength mode from the connection point B to the second end D. In other words, the electrical length from the connection point B to the second end D is close to the 1 / 4 wavelength of the second frequency band.

[0101] The first resonance mode and the second resonance mode are analyzed, wherein the second resonance mode can be divided into a first sub-resonance mode formed by a resonance current between the first end A and the second end D, and a second sub-resonance mode formed by a resonance current between the connection point B and the fourth end F. The antenna part where the first sub-resonance mode is located is a T-shaped antenna, and the antenna part where the second sub-resonance mode is located is a mouth-to-mouth antenna with free ends facing free ends.

[0102] The first resonant mode and the first sub-resonant mode form a group of radiation modes and balanced modes of the T-shaped antenna. The resonant current of the first resonant mode flows from the reference floor 60 to the two ends of the T-shaped antenna through the connection, and the first resonant mode is also called a high mode radiating mode. The resonant current of the first sub-resonant mode flows from one end of the T-shaped antenna to the other end, and the first sub-resonant mode is also called a high mode balanced mode. Generally, after the antenna assembly 100 generates a high mode radiation mode and a high mode balanced mode, the efficiency will be greatly improved, thereby improving the radiation efficiency (wave boost) within the antenna band.

[0103] When the first frequency band is close to the second frequency band (for example, less than 1 GHz), the first frequency band and the second frequency band form a continuous frequency band, have a better bandwidth, and have a better efficiency bandwidth.

[0104] In this embodiment, the center frequency of the second frequency band is 2.2 GHz, and the second frequency band is an effective frequency band where the return loss corresponding to the second resonance mode is less than -3dB, or less than -4dB, or less than -5dB. In this embodiment, the second frequency band is 2.1-2.5 GHz, which can effectively cover the B40 frequency band.

[0105] The second resonant mode formed in the present embodiment is a part where the strong current is distributed between the second end D and the connection point B. The current in this part can act on both sides, thereby forming a radiation mode of the mouth-to-mouth antenna toward the side where the second radiator 20 is located, and forming a balanced mode of the T-shaped antenna toward the side away from the second radiator 20. Therefore, the second resonant mode is a fusion mode of the radiation mode of the mouth-to-mouth antenna + the balanced mode of the T-shaped antenna.

[0106] See also Fig.13 In the first working mode, the first radiator 10 and the second radiator 20 also form a third resonance mode supporting the third frequency band under the excitation of the signal source 30. In other words, in the first working mode, the excitation signal provided by the signal source 30 forms a resonance of the third frequency band on the first radiator 10 and the second radiator 20, and this resonance is named the third resonance mode in the present application. The characteristics of this resonance are: the resonant current of the third resonance mode includes a fifth sub-resonant current formed between the first end A and the second end D, and a sixth sub-resonant current formed between the third end E and the fourth end F. The current intensity of the sixth sub-resonant current is greater than the current intensity of the fifth sub-resonant current. The mode of the sixth resonant current is a 1 / 4 wavelength mode of the third frequency band. The direction of the fifth sub-resonant current is opposite to that of the sixth sub-resonant current.

[0107] Specifically, the resonant current of the third resonant mode flows from the first end A to the second end D, and from the reference floor 60 to the third end E through the fourth end F of the second radiator 20. Of course, due to the periodicity of the current, the current direction of the resonant current of the third resonant mode can also be completely opposite to the current direction above. The sixth sub-resonant current is a strong current in the resonant current of the third resonant mode. The sixth sub-resonant current makes the main contribution to the radiation of the third resonant mode, and the current mode of the sixth sub-resonant current also determines the frequency band supported by the third resonant mode. The mode of the fifth sub-resonant current is the 1 / 2 wavelength mode of the second frequency band. Among them, the current mode of the sixth sub-resonant current is the 1 / 4 wavelength mode from the third end E to the fourth end F. In other words, the electrical length from the third end E to the fourth end F is close to the 1 / 4 wavelength of the third frequency band.

[0108] The second resonance mode and the third resonance mode are analyzed, wherein the third resonance mode can be divided into a third sub-resonance mode formed by a resonance current between the first end A and the second end D, and a fourth sub-resonance mode formed by a resonance current between the connection point B and the fourth end F. The antenna part where the third sub-resonance mode is located is a T-shaped antenna, and the antenna part where the fourth sub-resonance mode is located is a mouth-to-mouth antenna with free ends facing each other.

[0109] Among them, the second sub-resonance mode and the fourth sub-resonance mode form a radiation mode and a balanced mode of a pair of mouth-to-mouth antennas (EE mode, i.e., electric field-electric field mode). Among them, the second sub-resonance mode generates a unidirectional current from the connection point B to the second end D and from the third end E to the fourth end F, and the second sub-resonance mode is also called a high mode radiating mode. The fourth sub-resonance mode generates a reverse current from the connection point B to the second end D and from the third end E to the fourth end F, which is also called a high mode balanced mode. Generally, after the antenna component 100 generates a high mode radiation mode and a high mode balanced mode, there will be a greater improvement in efficiency, thereby improving the radiation efficiency (wave boost) within the antenna band.

[0110] When the second frequency band is close to the third frequency band (for example, less than 1 GHz), the second frequency band and the third frequency band form a continuous frequency band, have a better bandwidth, and have a better efficiency bandwidth.

[0111] In this embodiment, the center frequency of the third frequency band is 2.6 GHz, and the third frequency band is an effective frequency band where the return loss corresponding to the third resonance mode is less than -3 dB, or less than -4 dB, or less than -5 dB. In this embodiment, the third frequency band is 2.5-2.8 GHz, which can effectively cover the B41 frequency band.

[0112] The third resonant mode formed in this embodiment forms a fusion mode of the balanced mode of the mouth-to-mouth antenna + the balanced mode of the T-shaped antenna because the strong current is distributed between the third end E and the fourth end F and the first radiator 10 is the main radiator.

[0113] The radiation mode + balanced mode of the mouth-to-mouth antenna can improve the in-band efficiency of the mouth-to-mouth antenna, and an efficiency pit is generated after the balanced mode of the mouth-to-mouth antenna. The balanced mode + balanced mode of the T-shaped antenna can improve the in-band efficiency of the mouth-to-mouth antenna, and an efficiency pit is generated after the balanced mode of the T-shaped antenna. Relatively speaking, the efficiency pit of the T-shaped antenna is small, that is, the efficiency reduction is relatively small, for example, the efficiency is reduced from -3dB to about -4.5dB. Therefore, the T-shaped antenna has the potential to form a broadband antenna, that is, the radiation mode and balanced mode formed by the T-shaped antenna, combined with other modes, can cover a larger bandwidth.

[0114] In the embodiment of the present application, the electrical length from the connection point B to the first end A is designed to be greater than the electrical length from the connection point B to the second end D, so that the center frequency of the first frequency band is smaller than the center frequency of the second frequency band. Moreover, the electrical length from the connection point B to the second end D is designed to be greater than the electrical length from the third end E to the fourth end F, so that the center frequency of the second frequency band is smaller than the center frequency of the third frequency band. The above design sets the resonant frequency of the balanced mode of the mouth-to-mouth antenna at the highest frequency point, which not only utilizes the radiation mode + balanced mode to improve the efficiency of the mouth-to-mouth antenna within the wideband, but also sets the efficiency pit after the balanced mode of the mouth-to-mouth antenna in the area outside the wideband. The first frequency band, the second frequency band and the third frequency band form a continuous frequency band that can cover a bandwidth greater than or equal to 1 GHz, so that the antenna assembly 100 can support a wideband of more than 1 GHz.

[0115] In the present application, a capacitor or inductor element may be set between the fourth end F and the ground end to change the electrical length between the third end E and the fourth end F. For example, the physical length between the third end E and the fourth end F may be reduced, and an inductor element may be set to compensate for the reduction in the physical length between the third end E and the fourth end F.

[0116] Generally, when designing an antenna assembly 100 that covers the B3 frequency band, the B1 frequency band, the B39 frequency band, the B40 frequency band, and the B41 frequency band at the same time, the antenna assembly 100 needs to cover a bandwidth of 1.5-2.8 GHz. The frequency band supported by each antenna assembly 100 is limited. If a switch is used to switch the sub-frequency band, it will not be possible to support each of the above frequency bands at the same time. If multiple antenna assemblies 100 are used to support the above B3 frequency band, the B1 frequency band, the B39 frequency band, the B40 frequency band, and the B41 frequency band at the same time, the multiple antenna assemblies 100 will occupy a large space on the electronic device 1000.

[0117] Based on the above problems, the antenna assembly 100 provided in the present application designs the antenna structure to generate multiple resonant modes on the antenna structure, and designs the sizes of the resonant frequencies of the multiple resonant modes, thereby achieving broadband while further improving the in-band efficiency. It can simultaneously support the B3 band, B1 band, B39 band, B40 band, and B41 band without the need for switch switching or setting up multiple antenna assemblies 100.

[0118] See also Fig.14The second embodiment of the present application also provides an antenna assembly 100, which is compared with the antenna assembly 100 provided in the first embodiment. The antenna assembly 100 also includes a third radiator 80. The third radiator 80 includes a fifth end G and a sixth end H that are relatively arranged. The fifth end G is a free end. In the first working mode, the fifth end G is coupled to the first end A through a gap. The sixth end H is grounded. Optionally, the sixth end H can be directly grounded or grounded through a second matching circuit M2. Among them, the second matching circuit M2 can be a capacitor or an inductor to adjust the electrical length of the second radiator 20.

[0119] The third radiator 80 forms an L-shaped parasitic antenna. The second radiator 20, the first radiator 10, and the third radiator 80 form an L+T+L-shaped antenna to generate more resonance modes and support more frequency bands.

[0120] See also Fig.14 The embodiment of the present application not only generates the above-mentioned first resonance mode, second resonance mode, and third resonance mode, but the first radiator 10 and the third radiator 80 also form a fourth resonance mode supporting a fourth frequency band under the excitation of the signal source 30.

[0121] In other words, see Fig.14 In the first working mode, the excitation signal provided by the signal source 30 forms a resonance of the fourth frequency band on the first radiator 10 and the third radiator 80, and this resonance is named the fourth resonance mode in the present application. The characteristics of this resonance are: the resonant current of the fourth resonance mode includes a seventh sub-resonant current formed between the first end A and the second end D, and an eighth sub-resonant current formed between the fifth end G and the sixth end H. The current intensity of the eighth sub-resonant current is greater than the current intensity of the seventh sub-resonant current. The mode of the eighth resonant current is a 1 / 4 wavelength mode of the fourth frequency band. The seventh sub-resonant current has the same direction as the eighth sub-resonant current.

[0122] Specifically, the resonant current of the fourth resonant mode flows from the second end D to the first end A, and flows from the fifth end G to the sixth end H through the coupling gap. Of course, due to the periodicity of the current, the current direction of the resonant current of the fourth resonant mode can also be completely opposite to the above current direction. The eighth sub-resonant current is a strong current in the resonant current of the fourth resonant mode. The eighth sub-resonant current makes the main contribution to the radiation of the fourth resonant mode, and the current mode of the eighth sub-resonant current also determines the frequency band supported by the fourth resonant mode. The mode of the seventh sub-resonant current is the 1 / 2 wavelength mode of the second frequency band. Among them, the current mode of the eighth sub-resonant current is the 1 / 4 wavelength mode from the fifth end G to the sixth end H. In other words, the electrical length from the fifth end G to the sixth end H is close to the 1 / 4 wavelength of the fourth frequency band.

[0123] The first resonance mode and the fourth resonance mode are analyzed, wherein the fourth resonance mode can be divided into a fifth sub-resonance mode formed by a resonance current between the first end A and the second end D, and a sixth sub-resonance mode formed by a resonance current between the connection point B and the fourth end F. The antenna part where the fifth sub-resonance mode is located is a T-shaped antenna, and the antenna part where the sixth sub-resonance mode is located is a mouth-to-mouth antenna with free ends facing free ends.

[0124] The first resonant mode and the fifth sub-resonant mode form the radiation mode and the balanced mode of the T-shaped antenna. The sixth sub-resonant mode is the radiation mode of the mouth-to-mouth antenna.

[0125] In the present embodiment, since the electrical length between the connection point B and the first end A is greater than the electrical length between the connection point B and the second end D, the radiation section between the connection point B and the first end A is the main radiation section compared to the radiation section between the connection point B and the second end D. In this way, the resonant current on the main radiation section can affect the generation of the resonant current on the third radiator 80, thereby generating a fusion mode of the radiation mode of the above-mentioned mouth-to-mouth antenna + the balanced mode of the T-shaped antenna.

[0126] Of course, in other embodiments, the electrical length between the connection point B and the first end A is less than the electrical length between the connection point B and the second end D, and the radiation section between the connection point B and the second end D is the main radiation section. Compared with the first to fourth resonance modes described above, the resonance mode in this embodiment has a constant current distribution in the first resonance mode, and a change in intensity distribution such that the current strong area of ​​the first resonance mode is located in the radiation section between the connection point B and the second end D, the resonance frequency of the first resonance mode is followed by the resonance frequency of the third resonance mode, the resonance frequency of the third resonance mode is followed by the resonance frequency of the second resonance mode, and the current distribution and intensity distribution of the fourth resonance mode remain unchanged.

[0127] In this implementation manner, the center frequency of the fourth frequency band is greater than the center frequency of the first frequency band, and the center frequency of the fourth frequency band is less than the center frequency of the third frequency band.

[0128] Since the balanced mode of the mouth-to-mouth antenna will produce an efficiency pit, the center frequency of the fourth frequency band is lower than the center frequency of the third frequency band.

[0129] In this implementation, the center frequency of the fourth frequency band is between the center frequency of the first frequency band and the second center frequency. For example, the center frequency of the first frequency band is 1.7 GHz, the center frequency of the fourth frequency band is 1.9 GHz, the center frequency of the second frequency band is 2.2 GHz, and the center frequency of the third frequency band is 1.6 GHz. The first frequency band, the fourth frequency band, the second frequency band, and the third frequency band form a continuous frequency band covering 1.5-2.8 GHz, and can simultaneously cover the B3 frequency band, the B1 frequency band, the B39 frequency band, the B40 frequency band, and the B41 frequency band.

[0130] See also Fig.15 In the first embodiment and the second embodiment of the present application, in the second working mode, the first radiator 10 and the second radiator 20 form a fifth resonance mode supporting the fifth frequency band under the excitation of the signal source 30. In other words, in the second working mode, the excitation signal provided by the signal source 30 forms a resonance of the fifth frequency band on the first radiator 10 and the second radiator 20, and the resonance is named the fifth resonance mode in the present application. The characteristic of this resonance is that the resonant current of the fifth resonance mode includes a ninth sub-resonant current formed between the first end A and the second end D. Specifically, the ninth sub-resonant current flows from the reference floor 60 through the first end A to the second end D. Due to the periodicity of the current, the ninth sub-resonant current can also be reversed. The mode of the ninth sub-resonant current is the 1 / 4 wavelength mode of the fifth frequency band. In other words, the electrical length between the first end A and the second end D is close to the 1 / 4 wavelength of the fifth frequency band.

[0131] For further information, see Fig.15 The second switch circuit 50 includes a second switch unit K2 and a capacitor C1. One end of the second switch unit K2 is electrically connected to the first end A, the other end of the second switch unit K2 is electrically connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded.

[0132] In the embodiment of the present application, the electrical length between the connection point B and the first end A is close to 1 / 4 wavelength of the first frequency band, and the first frequency band is about 1.8 GHz. When the length of the first radiator 10 remains unchanged, the second switch circuit 50 is switched to disconnect, and the first switch circuit 40 is switched to conduction, in order to adjust the fifth frequency band to belong to the MHB frequency band, a capacitor C1 can be connected in series at the first end A back to the ground. The capacitor C1 can reduce the electrical length of the first radiator 10. The electrical length of the capacitor C1 and the first radiator 10 is approximately the electrical length from the first end A to the connection point B, so that the fifth frequency band belongs to the MHB frequency band. The present application does not make a specific limitation on the capacitance value of the capacitor C1. Optionally, the center frequency of the fifth frequency band is about 1.8 GHz, and the fifth frequency band covers about 1.6-2 GHz. It can effectively cover the B3 frequency band, the B1 frequency band, and the B39 frequency band.

[0133] For further information, see Fig.16 , the first radiator 10 and the second radiator 20 further form a sixth resonance mode supporting a sixth frequency band under the excitation of the signal source 30. The resonant current of the sixth resonance mode includes a tenth sub-resonant current formed between the feeding point C and the second end D, and an eleventh sub-resonant current between the third end E and the fourth end F. The resonant current of the sixth resonance mode flows from the feeding point C to the second end D, and flows from the third end E to the fourth end F through the coupling gap. Due to the periodicity of the current, the resonant current of the sixth resonance mode may be opposite to the above current.

[0134] The current intensity of the tenth sub-resonant current is greater than the current intensity of the eleventh sub-resonant current. The portion of the sixth resonant mode between the feeding point C and the second end D is the main mode, which makes the main contribution to the radiation. The current direction of the tenth sub-resonant current is the same as the current direction of the eleventh sub-resonant current. The mode of the tenth sub-resonant current is the 1 / 4 wavelength mode of the sixth frequency band. The distance between the feeding point C and the second end D is approximately 1 / 4 wavelength of the sixth frequency band.

[0135] Among them, the sixth resonance mode is the radiation mode of the mouth-to-mouth antenna.

[0136] See also Fig.17 , the first radiator 10 and the second radiator 20 further form a seventh resonance mode supporting the seventh frequency band under the excitation of the signal source 30. The resonant current of the seventh resonance mode includes a twelfth sub-resonant current formed between the feeding point C and the second end D, and a thirteenth sub-resonant current between the third end E and the fourth end F. The resonant current of the seventh resonance mode flows from the feeding point C to the second end D, and then flows from the fourth end F to the third end E. Due to the periodicity of the current, the resonant current of the sixth resonance mode can be opposite to the above current.

[0137] The current intensity of the thirteenth sub-resonant current is greater than the current intensity of the twelfth sub-resonant current. The portion of the seventh resonant mode between the third end E and the fourth end F is the main mode, which makes the main contribution to radiation. The current direction of the thirteenth sub-resonant current is the same as the current direction of the twelfth sub-resonant current. The mode of the thirteenth sub-resonant current is the 1 / 4 wavelength mode of the seventh frequency band. The distance between the third end E and the fourth end F is approximately 1 / 4 wavelength of the seventh frequency band.

[0138] Among them, the seventh resonance mode is the balanced mode of the mouth-to-mouth antenna.

[0139] The sixth resonant mode and the seventh resonant mode form a set of radiation mode and balanced mode of the mouth-to-mouth antenna. The sixth resonant mode is also called a high mode radiating mode. The seventh resonant mode is also called a high mode balanced mode. Generally, after the antenna assembly 100 generates a high mode radiating mode and a high mode balanced mode, the efficiency will be greatly improved, thereby improving the radiation efficiency (wave boost) within the antenna band.

[0140] When the sixth frequency band is close to the seventh frequency band (for example, less than 1 GHz), the sixth frequency band and the seventh frequency band form a continuous frequency band, have a better bandwidth, and have a better efficiency bandwidth.

[0141] In this embodiment, the center frequency of the sixth frequency band is 2.5 GHz, and the sixth frequency band is an effective frequency band where the return loss corresponding to the sixth resonance mode is less than -3 dB, or less than -4 dB, or less than -5 dB. In this embodiment, the sixth frequency band is 2-2.7 GHz, which can effectively cover the B40 frequency band and the B41 frequency band.

[0142] The center frequency of the fifth frequency band is less than the center frequency of the sixth frequency band. The center frequency of the sixth frequency band is less than the center frequency of the seventh frequency band. The fifth frequency band, the sixth frequency band, and the seventh frequency band form a continuous frequency band capable of covering a bandwidth greater than or equal to 1 GHz.

[0143] The electrical length between the connection point B and the first end A on the first radiator 10 is greater than the electrical length between the connection point B and the second end D, and the electrical length between the connection point B and the second end D is greater than the electrical length between the third end E and the fourth end F.

[0144] Since the seventh resonant mode is a balanced mode of the mouth-to-mouth antenna, an efficiency pit will be generated after the balanced mode of the mouth-to-mouth antenna. Therefore, by designing the relationship between the electrical length between the connection point B and the first end A, the electrical length between the connection point B and the second end D, and the electrical length between the third end E and the fourth end F on the first radiator 10, the fifth frequency band is made smaller than the sixth frequency band to improve the in-band efficiency of the antenna assembly 100.

[0145] In the embodiment of the present application, the distance between the feeding point C and the first end A is (1 / 4 to 1 / 2) of the total length of the first radiator 10 .

[0146] Taking the total length of the first radiator 10 as 1 / 4 wavelength as an example, the distance between the first connection point BA and the second connection point BB is greater than or equal to 1 / 16 wavelength and less than 1 / 8 wavelength.

[0147] When the distance between the first connection point BA and the second connection point BB is less than 1 / 16 wavelength, that is, the distance between the feeding point C and the first end A is 1 / 4 of the total length of the first radiator 10, the mode formed by the antenna assembly 100 is an IFA mode and cannot generate two resonant modes.

[0148] When the distance between the first connection point BA and the second connection point BB is greater than or equal to 1 / 16 wavelength and less than or equal to 1 / 8 wavelength, that is, the distance between the feeding point C and the first end A is (1 / 4 to 1 / 2) of the total length of the first radiator 10, the IFA mode is split into two modes, one of which is a 1 / 4 wavelength mode from the first end A to the second end D (that is, the fifth resonance mode), and the other is a 1 / 4 wavelength mode from the feeding point C to the second end D (that is, the part of the sixth resonance mode between the feeding point C and the second end D). In this embodiment, by making the distance between the feeding point C and the first end A equal to (1 / 4 to 1 / 2) of the total length of the first radiator 10, two resonance modes are generated on the IFA antenna.

[0149] In this embodiment, at least one of the first switch circuit 40 and the second switch circuit 50 further includes a tuning circuit. One end of the tuning circuit is electrically connected to the first end A. The other end of the tuning circuit is grounded. The tuning circuit is used to switch a sub-band in the frequency band supported by the antenna assembly 100, so that the antenna assembly 100 can support more frequency bands.

[0150] Optional, see Fig.18 and Fig.19 , the antenna assembly 100 also includes a first tuning circuit T1. The first tuning circuit T1 is arranged on a circuit board (main board). The first tuning circuit T1 also includes a plurality of first tuning branches T11. The impedance value of each of the first tuning branches T11 is different. One end of the plurality of first tuning branches T11 is electrically connected to one end of the first switch unit K1, and the other end of the first switch unit K1 is electrically connected to the connection point B. The other ends of the plurality of first tuning branches T11 are all grounded. For example, the plurality of first tuning branches T11 are a plurality of capacitors with different capacitance values. Alternatively, the plurality of first tuning branches T11 are a plurality of inductors with different inductance values. Alternatively, the plurality of first tuning branches T11 include a plurality of capacitors with different capacitance values, and include a plurality of inductors with different inductance values. By adjusting the first switch unit K1 to be electrically connected to different devices, the equivalent electrical length of the first tuning branch T11 electrically connected to the first radiator 10 is adjusted, thereby switching the sub-band supported by the antenna assembly 100. Of course, the first tuning branch T11 may include an adjustable capacitor.

[0151] The first tuning circuit T1 is used to switch the frequency band supported by the antenna assembly 100 in the first working mode.

[0152] Optional, see Fig. 20 and Fig.21 , the antenna assembly 100 also includes a second tuning circuit T2. The second tuning circuit T2 is arranged on a circuit board (main board). The second tuning circuit T2 also includes a plurality of second tuning branches T12. The impedance value of each second tuning branch T12 is different. One end of the plurality of second tuning branches T12 is electrically connected to one end of the second switch unit K2, and the other end of the second switch unit K2 is electrically connected to the first end A. The other ends of the plurality of second tuning branches T12 are all grounded. For example, the plurality of second tuning branches T12 are a plurality of capacitors with different capacitance values. Alternatively, the plurality of second tuning branches T12 are a plurality of inductors with different inductance values. Alternatively, the plurality of second tuning branches T12 include a plurality of capacitors with different capacitance values, and include a plurality of inductors with different inductance values. By adjusting the second switch unit K2 to be electrically connected to different devices, the equivalent electrical length of the second tuning branch T12 electrically connected to the first radiator 10 is adjusted, thereby switching the sub-band supported by the antenna assembly 100. Of course, the second tuning branch T12 may include an adjustable capacitor.

[0153] The second tuning circuit T2 is used to switch the frequency band supported by the antenna assembly 100 in the second working mode.

[0154] The present application does not limit the location of the antenna assembly 100 on the electronic device 1000. Optionally, the antenna assembly 100 can be disposed on the top edge 321, or the bottom edge 322, or the first side edge 323, or the second side edge 324, or two intersecting adjacent edges of the frame 320 of the electronic device 1000.

[0155] When the antenna assembly 100 is arranged at the bottom edge 322, since the main branches and parasitic branches where the current is concentrated are located at the bottom edge 322, the current intensity is large, especially in the N41 frequency band (the N41 frequency band has a high base station duty cycle and a large N41 signal energy), the bottom edge 322 has a serious over-SAR. In addition, there are also different degrees of over-SAR in other MHB frequency bands. Therefore, when actual users use it, since the SAR is backed off by 2-3dB, the performance after backing off in the actual scenario is not high. Therefore, how to balance performance and low SAR while reducing costs has become a technical problem that needs to be solved.

[0156] The first radiator 10 includes a first radiating section 11 and a second radiating section 12 connected to each other. The first radiating section 11 and the second radiating section 12 are respectively arranged on two adjacent connecting edges (eg Figure 3The SAR hotspot generated by the first radiator 10 when transmitting and receiving electromagnetic wave signals is distributed to the sides where the two connecting edges are located, that is, the side where the first radiating section 11 is located and the side where the second radiating section 12 is located.

[0157] In the embodiment of the present application, the first radiator 10 is disposed on two adjacent intersecting sides of the frame 320 , and the current of the horizontal branches and the vertical branches is balanced by the corner, thereby reducing the SAR value of the bottom edge 322 , and significantly reducing the SAR value of the MHB frequency band.

[0158] For example, when the antenna assembly 100 is completely disposed at the bottom edge 322 of the electronic device 1000, the SAR value of the antenna assembly 100 at the bottom edge 322 is 20. When the antenna assembly 100 is disposed at two adjacent sides where the bottom edge 322 and the first side edge 323 intersect, the SAR value of the antenna assembly 100 at the bottom edge 322 is 16, and the SAR value of the antenna assembly 100 at the first side edge 323 is 5. Since the SAR value of the antenna assembly 100 at the first side edge 323 is much smaller than the SAR value at the bottom edge 322, when performing the SAR value fallback calculation, the SAR value of 5 at the first side edge 323 may not be considered, and only the SAR value of 16 of the reference antenna assembly 100 at the bottom edge 322 may be considered. In this way, compared with the original SAR value of 20, the SAR value of the MHB band is greatly reduced.

[0159] On the other hand, the antenna component 100 in the embodiment of the present application includes at least a first radiator 10 and a second radiator 20, wherein the radiator length of the antenna component 100 is relatively long, and the current path of the radiator on the antenna component 100 is long, so that the current amplitude on the radiator of the antenna component 100 is reduced, the current intensity concentration is reduced, and the SAR value of the antenna component 100 is reduced.

[0160] The electronic device 1000 further includes a reference floor 60. The reference floor 60 is disposed in the frame 320. The reference floor 60 has a connection point between two adjacent sides intersecting with the frame 320. The distance between the position where the first switch circuit 40 electrically connects the reference floor 60 and the connection point between the two adjacent sides intersecting with the reference floor 60 is less than 1 / 8 wavelength corresponding to the frequency band supported by the antenna assembly 100.

[0161] The position where the first switch circuit 40 is electrically connected to the reference floor 60 is the return position. Taking the frequency band supported by the antenna assembly 100 as 1.5-2.8 GHz as an example, the distance between the position where the first switch circuit 40 is electrically connected to the reference floor 60 and the connection point between two adjacent edges intersecting on the reference floor 60 is less than 1 / 8 wavelength corresponding to (1.5-2.8 GHz).

[0162] Since the return position and feeding position of the first radiator 10 are both located near the connection point between two adjacent edges intersecting on the reference floor 60, a floor current is formed on the reference floor 60 under the excitation of the signal source 30. The floor current flows from a distance to the return position of the antenna assembly 100 and converges at the return position of the antenna assembly 100, and flows to the first radiator 10 through the return position of the antenna assembly 100. Since the antenna assembly 100 is returned to the ground near the connection point between two adjacent edges intersecting on the reference floor 60, when the reference floor 60 participates in radiation, a transverse current along the transverse edge and a longitudinal current along the longitudinal edge are generated on the reference floor 60. The directions of the transverse current and the longitudinal current are both toward the connection point between the two adjacent edges intersecting on the reference floor 60. Since the transverse current and the longitudinal current intersect and are even close to perpendicular, there is little mutual cancellation between the transverse current and the longitudinal current.

[0163] If the return position of the first radiator 10 is set at a position along the longitudinal edge that is far away from the connection point between the two adjacent edges intersecting on the reference floor 60, a reverse current will be generated along the longitudinal edge. The far-field energy of this reverse current can offset each other, thereby reducing its radiation efficiency.

[0164] Specifically, the length of the horizontal side is less than the length of the vertical side. When the connection point between the two adjacent sides intersecting on the reference floor 60 of the antenna assembly 100 is returned to the ground, the maximum angle between the floor currents on the reference floor 60 is about 90°. That is, the horizontal current along the horizontal side and the vertical current along the vertical side are currents with the maximum angle, and no reverse current is generated, thereby improving the contribution efficiency of the reference floor 60, and thus improving the radiation efficiency of the antenna assembly 100.

[0165] See also Figure 3 , Figure 3 1 is a schematic diagram of the structure of the antenna assembly 100 provided in the first embodiment of the present application, which is arranged at the bottom edge 322 and the second side edge 324 of the electronic device 1000 in the first working mode. A portion of the first radiator 10 is arranged at the bottom edge 322 of the electronic device 1000, and another portion of the first radiator 10 is arranged at the second side edge 324 of the electronic device 1000. The second radiator 20 is entirely arranged at the bottom edge 322 of the electronic device 1000. The antenna assembly 100 generates at least three resonance modes, and the above three resonance modes are respectively the first resonance mode, the second resonance mode and the third resonance mode.

[0166] See also Fig. 22 , Fig. 22 yes Figure 3 The S parameters and efficiency curves of the antenna assembly 100 are shown. Curve a is the S parameter of the antenna assembly 100. Curve b is the radiation efficiency curve of the antenna assembly 100. Curve c is the total efficiency curve of the antenna assembly 100.

[0167] from Fig. 22 It can be seen from the S parameter curve in that point 1 of curve a corresponds to the resonant frequency of the first resonant mode, point 2 of curve a corresponds to the resonant frequency of the second resonant mode, and point 3 of curve a corresponds to the resonant frequency of the third resonant mode. It can be seen from curve a that the frequency point where the radiation mode of the T-shaped antenna is located is pulled apart from the frequency point where the balanced mode is located during the tuning process of the first matching circuit M1. For example, the frequency point where the balanced mode of the T-shaped antenna is located is located after the efficiency pit of the T-shaped antenna. The efficiency of the T-shaped antenna is reduced less in the efficiency pit, and the in-band efficiency of the T-shaped antenna is not affected. After the frequency point where the radiation mode of the T-shaped antenna is located is pulled apart from the frequency point where the balanced mode is located, the resonant frequencies of the three resonant modes form a wider frequency band.

[0168] Please refer to Table 1-1, which shows the efficiency of the antenna component 100 in the B3 frequency band, B1 frequency band, B40 frequency band and B41 frequency band when the antenna component 100 is arranged at the bottom edge 322 of the electronic device 1000 in the traditional solution and the efficiency of the antenna component 100 in the B3 frequency band, B1 frequency band, B40 frequency band and B41 frequency band when the antenna component 100 in this embodiment is arranged at the two adjacent edges of the intersection of the bottom edge 322 and the second side edge 324 of the electronic device 1000.

[0169] Table 1-1

[0170]

[0171] Please refer to Table 1-2, which shows the efficiencies corresponding to the power backoff in the B3 band, B1 band, B40 band and B41 band after the antenna component 100 detects the SAR value of the bottom edge 322 in the traditional solution and the efficiencies corresponding to the power backoff in the B3 band, B1 band, B40 band and B41 band after the antenna component 100 detects the SAR value of the bottom edge 322 in this embodiment.

[0172] Table 1-2

[0173]

[0174] Among them, the standards of B3 and B1 are frequency division duplex (FDD) standards, the base station transmission power duty cycle is 100%, and the efficiency value of avoiding SAR power fallback is the actual benefit, which is of great practical significance.

[0175] Please refer to Table 1-3, which shows the efficiency of the antenna assembly 100 after power backoff in the traditional solution and the efficiency of the antenna assembly 100 after power backoff in this embodiment.

[0176] Table 1-3

[0177]

[0178] As can be seen from Tables 1-3, in the conventional solution, after SAR detection and power backoff at the bottom edge 322, the efficiency in the B3 band is -5.2 dB. In this embodiment, since the antenna assembly 100 is disposed at the two intersecting adjacent edges between the bottom edge 322 and the second side edge 324, the SAR value of the B3 band at the bottom edge 322 is reduced, and the power backoff is small. Therefore, the efficiency of this embodiment in the B3 band after SAR detection at the bottom edge 322 is -2.5 dB. Compared with the conventional solution, the embodiment of the present application has benefits in the B3 band. Similarly, the embodiment of the present application has benefits in the B1 band. The antenna assembly 100 provided in the embodiment of the present application also takes into account the reduction of SAR, and can achieve broadband CA state without setting a switch, and improves the actual performance after backing off SAR.

[0179] See also Fig.23 , Fig.23 1 is a schematic diagram of the structure of the antenna assembly 100 provided in the second embodiment of the present application, which is arranged at the bottom edge 322 and the second side edge 324 of the electronic device 1000. A portion of the first radiator 10 is arranged at the bottom edge 322 of the electronic device 1000, and another portion of the first radiator 10 is arranged at the second side edge 324 of the electronic device 1000. The second radiator 20 is entirely arranged at the bottom edge 322 of the electronic device 1000. The third radiator 80 is entirely arranged at the second side edge 324. The antenna assembly 100 generates at least four resonance modes, and the above four resonance modes are respectively the first resonance mode, the fourth resonance mode, the second resonance mode and the third resonance mode.

[0180] See also Fig.24 , Fig.24 yes Fig.23 The S parameters and efficiency curves of the antenna assembly 100 are shown. Curve a is the S parameter of the antenna assembly 100. Curve b is the radiation efficiency curve of the antenna assembly 100. Curve c is the total efficiency curve of the antenna assembly 100.

[0181] from Fig.24It can be seen from the S parameter curve in that point 1 of curve a corresponds to the resonant frequency of the first resonant mode, point 2 of curve a corresponds to the resonant frequency of the fourth resonant mode, point 3 of curve a corresponds to the resonant frequency of the second resonant mode, and point 4 of curve a corresponds to the resonant frequency of the third resonant mode. It can be seen from curve a that the frequency point (point 1) where the radiation mode of the T-shaped antenna is located and the frequency point (point 2) where the balanced mode is located are pulled apart during the tuning process of the first matching circuit M1. For example, the frequency point (point 2) where the balanced mode of the T-shaped antenna is located is located after the efficiency pit of the T-shaped antenna (efficiency corresponding to 1.9 GHz). Since the efficiency of the T-shaped antenna is less reduced in the efficiency pit, the efficiency pit does not affect the in-band efficiency of the T-shaped antenna. After the frequency point where the radiation mode of the T-shaped antenna is located and the frequency point where the balanced mode is located are pulled apart, the resonant frequencies of the four resonant modes form a wider frequency band. It can be seen that at this time, the antenna assembly 100 satisfies the MHB CA state when there is no switch switching, and has a higher efficiency.

[0182] Please refer to Table 2-1, which shows the efficiency of the antenna component 100 in the B3 frequency band, B1 frequency band, B40 frequency band and B41 frequency band when the antenna component 100 is arranged at the bottom edge 322 of the electronic device 1000 in the traditional solution and the efficiency of the antenna component 100 in the B3 frequency band, B1 frequency band, B40 frequency band and B41 frequency band when the antenna component 100 in this embodiment is arranged at the two adjacent edges of the intersection of the bottom edge 322 and the second side edge 324 of the electronic device 1000.

[0183] Table 2-1

[0184]

[0185]

[0186] See also Fig.25 Taking the B3 frequency band as an example, the SAR hotspot comparison distribution of the antenna assembly 100 in this embodiment is as follows: Fig.25 As shown. Compared with the traditional solution, in any frequency band of MHB, the current is distributed in the horizontal and vertical segments, and the SAR hotspots generate both the SAR hotspot of the bottom edge 322 (the dotted box portion corresponding to the bottom edge 322) and the SAR hotspot of the second side edge 324 (the dotted box portion corresponding to the second side edge 324), which plays a role in reducing the SAR of the bottom edge 322. Among them, the SAR of the second side edge 324 itself is very low, and the SAR of the highest surface is the bottom edge 322. After being shunted to the second side edge 324, the highest surface SAR is still the bottom edge 322, and there is no risk of exceeding SAR on other surfaces. Therefore, the main concern here is still the SAR reduction problem of the bottom edge 322. In this embodiment, by moving part of the current of the bottom edge 322 to the second side edge 324, in other words, introducing a SAR hotspot in a corner, the SAR value of the original bottom edge 322 is reduced.

[0187] From the perspective of the current path, the overall current in this embodiment is a 3 / 4 wavelength mode of the frequency band supported by the antenna assembly 100. Compared with the 1 / 2 wavelength mode corresponding to the supported frequency band in the traditional solution, the radiator in this embodiment is longer and the current intensity is reduced. Therefore, the SAR hotspot intensity is also reduced, and the required back-off power is reduced.

[0188] Please refer to Table 2-2, which shows the efficiencies corresponding to the power backoff in the B3 band, B1 band, B40 band and B41 band after the antenna component 100 detects the SAR value of the bottom edge 322 in the traditional solution and the efficiencies corresponding to the power backoff in the B3 band, B1 band, B40 band and B41 band after the antenna component 100 detects the SAR value of the bottom edge 322 in this embodiment.

[0189] Table 2-2

[0190]

[0191] Among them, the standards of B3 and B1 are frequency division duplex (FDD) standards, the base station transmission power duty cycle is 100%, and the efficiency value of avoiding SAR power fallback is the actual benefit, which is of great practical significance.

[0192] Please refer to Table 2-3, which shows the efficiency of the antenna assembly 100 after power backoff in the traditional solution and the efficiency of the antenna assembly 100 after power backoff in this embodiment.

[0193] Table 2-3

[0194]

[0195] As can be seen from Table 2-3, in the conventional solution, after SAR detection and power backoff at the bottom edge 322, the efficiency in the B3 frequency band is -5.2dB. In this embodiment, since the antenna assembly 100 is arranged at the two adjacent edges intersecting between the bottom edge 322 and the second side edge 324, the SAR value of the B3 frequency band at the bottom edge 322 is reduced, and the power backoff is small. Therefore, the efficiency of this embodiment in the B3 frequency band after SAR detection at the bottom edge 322 is -3.8dB. Compared with the conventional solution, the embodiment of the present application has benefits in the B3 frequency band. Similarly, the embodiment of the present application has benefits in the B1 and B41 frequency bands. After the embodiment of the present application adopts a low SAR design, the actual performance improves the actual use performance after backoff compared with the conventional solution, and does not reduce SAR or significantly reduces SAR in each MHB frequency band, thereby improving the actual use performance of users.

[0196] See also Fig.26 , Fig.261 is a schematic diagram of the structure of the antenna assembly 100 provided in the first embodiment of the present application, which is arranged at the bottom edge 322 of the electronic device 1000 in the second working mode. The first radiator 10 and the second radiator 20 are all arranged at the bottom edge 322 of the electronic device 1000. The antenna assembly 100 generates at least three resonance modes, and the above three resonance modes are respectively the fifth resonance mode, the sixth resonance mode and the seventh resonance mode. Of course, the antenna assembly 100 can also be arranged at the two adjacent sides where the bottom edge 322 and the second side edge 324 intersect.

[0197] See also Fig.24 , Fig.24 yes Fig.26 The S parameters and efficiency curves of the antenna assembly 100 are shown. Curve a is the S parameter of the antenna assembly 100. Curve b is the radiation efficiency curve of the antenna assembly 100. Curve c is the total efficiency curve of the antenna assembly 100.

[0198] from Fig.24 From the S parameter curve in , it can be seen that point 1 of curve a corresponds to the resonant frequency of the fifth resonant mode, point 2 of curve a corresponds to the resonant frequency of the sixth resonant mode, and point 3 of curve a corresponds to the resonant frequency of the seventh resonant mode. From curve a, it can be seen that the resonant frequency of the fifth resonant mode is far away from the resonant frequency of the sixth resonant mode, and the fifth frequency band and the sixth frequency band form a continuous and wide frequency band.

[0199] The antenna assembly 100 provided in the embodiment of the present application can generate MHB CA states such as B3+B1+B39+B40+B41 without setting a switching switch, thereby saving costs; a metal insert process is used to increase breaks and introduce parasitic branches without affecting the appearance; the feeding point C and the return point of the antenna assembly 100 in the first working mode are both located at the connection point between two adjacent edges intersecting on the reference floor 60, and a large current is returned to the ground at the connection point between two adjacent edges intersecting on the reference floor 60, thereby improving efficiency; the overall branch form is a corner T+double L branch form, and the corner is used to balance the current of the lateral branches and the longitudinal branches, thereby greatly reducing the MHB SAR value, realizing a low SAR design, and improving the actual user performance.

[0200] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: An antenna assembly is included, wherein the antenna assembly includes: A first radiator, the first radiator comprising a first end and a second end arranged opposite to each other, and a connection point and a feeding point arranged between the first end and the second end; A signal source, the signal source being electrically connected to the feeding point; A second radiator, the second radiator comprising a third end and a fourth end arranged opposite to each other, the third end and the second end are coupled via a gap, and the fourth end is grounded; a first switch circuit, one end of the first switch circuit being electrically connected to the connection point, and the other end of the first switch circuit being grounded; and a second switch circuit, wherein one end of the second switch circuit is electrically connected to the first end, and the other end of the second switch circuit is grounded; The working modes of the antenna component include a first working mode and a second working mode. In the first working mode, the first switch circuit is in an on state, and the second switch circuit is in an off state; in the second working mode, the first switch circuit is in an off state, and the second switch circuit is in an on state.

2. The electronic device according to claim 1, wherein: The electronic device further includes a proximity detector electrically connected to the antenna assembly, and the antenna assembly is configured to switch to the second operating mode when the proximity detector detects that the subject to be detected is close to the first end of the first radiator.

3. The electronic device according to claim 1, wherein: The antenna assembly can cover a target frequency band in both the first working mode and the second working mode, and a bandwidth of the target frequency band is greater than or equal to 1 GHz.

4. The electronic device according to claim 1, wherein: In the first working mode or the second working mode, the first radiator and the second radiator form at least three resonance modes under the excitation of the signal source.

5. The electronic device according to claim 4, characterized in that: In the first working mode, the first radiator and the second radiator form a first resonance mode supporting the first frequency band under the excitation of the signal source, the resonance current of the first resonance mode includes a first sub-resonance current formed between the first end and the connection point, and a second sub-resonance current formed between the second end and the connection point, the current intensity of the first sub-resonance current is greater than the current intensity of the second sub-resonance current, the mode of the first sub-resonance current is a 1 / 4 wavelength mode of the first frequency band, and the direction of the first sub-resonance current is opposite to that of the second sub-resonance current.

6. The electronic device according to claim 5, characterized in that: The first radiator and the second radiator further form a second resonance mode supporting a second frequency band under the excitation of the signal source, the resonance current of the second resonance mode includes a third sub-resonance current formed between the first end and the second end, and a fourth sub-resonance current formed between the third end and the fourth end, the current intensity of the third sub-resonance current between the connection point and the second end is greater than the current intensity of the third sub-resonance current between the connection point and the first end, the current intensity of the third sub-resonance current between the connection point and the second end is greater than the current intensity of the fourth sub-resonance current, the mode of the third sub-resonance current is a 1 / 2 wavelength mode of the second frequency band, and the direction of the third sub-resonance current is the same as that of the fourth sub-resonance current.

7. The electronic device according to claim 6, characterized in that: The first radiator and the second radiator further form a third resonance mode supporting a third frequency band under the excitation of the signal source, the resonance current of the third resonance mode includes a fifth sub-resonance current formed between the first end and the second end, and a sixth sub-resonance current formed between the third end and the fourth end, the current intensity of the sixth sub-resonance current is greater than the current intensity of the fifth sub-resonance current, the mode of the sixth resonance current is a 1 / 4 wavelength mode of the third frequency band, and the direction of the fifth sub-resonance current is opposite to that of the sixth sub-resonance current.

8. The electronic device according to claim 7, characterized in that: The center frequency of the first frequency band is less than the center frequency of the second frequency band, the center frequency of the second frequency band is less than the center frequency of the third frequency band, and the first frequency band, the second frequency band and the third frequency band form a continuous frequency band that can cover a bandwidth greater than or equal to 1 GHz.

9. The electronic device according to claim 6, characterized in that: The antenna assembly also includes a third radiator, which includes a fifth end and a sixth end that are arranged opposite to each other, the sixth end is grounded, and in the first working mode, the fifth end is coupled to the first end through a gap.

10. The electronic device according to claim 9, characterized in that: The first radiator and the third radiator further form a fourth resonance mode supporting a fourth frequency band under the excitation of the signal source, the resonance current of the fourth resonance mode includes a seventh sub-resonance current formed between the first end and the second end, and an eighth sub-resonance current formed between the fifth end and the sixth end, the current intensity of the eighth sub-resonance current is greater than the current intensity of the seventh sub-resonance current, the mode of the eighth resonance current is a 1 / 4 wavelength mode of the fourth frequency band, and the seventh sub-resonance current has the same direction as the eighth sub-resonance current.

11. The electronic device according to claim 10, characterized in that: The center frequency of the fourth frequency band is greater than the center frequency of the first frequency band, and the center frequency of the fourth frequency band is less than the center frequency of the third frequency band.

12. The electronic device according to claim 4, characterized in that: In the second working mode, the first radiator and the second radiator form a fifth resonance mode supporting the fifth frequency band under the excitation of the signal source, and the resonance current of the fifth resonance mode includes a ninth sub-resonance current formed between the first end and the second end, and the mode of the ninth sub-resonance current is a 1 / 4 wavelength mode of the fifth frequency band.

13. The electronic device according to claim 12, characterized in that: The second switch circuit includes a switch unit and a capacitor, one end of the switch unit is electrically connected to the first end, the other end of the switch unit is electrically connected to one end of the capacitor, and the other end of the capacitor is grounded.

14. The electronic device according to claim 13, characterized in that: The first radiator and the second radiator further form a sixth resonance mode supporting a sixth frequency band under the excitation of the signal source, the resonance current of the sixth resonance mode includes a tenth sub-resonance current formed between the feeding point and the second end, and an eleventh sub-resonance current between the third end and the fourth end, the current intensity of the tenth sub-resonance current is greater than the current intensity of the eleventh sub-resonance current, the current direction of the tenth sub-resonance current is the same as the current direction of the eleventh sub-resonance current, and the mode of the tenth sub-resonance current is a 1 / 4 wavelength mode of the sixth frequency band.

15. The electronic device according to claim 14, characterized in that: The first radiator and the second radiator further form a seventh resonance mode supporting the seventh frequency band under the excitation of the signal source, the resonance current of the seventh resonance mode includes a twelfth sub-resonance current formed between the feeding point and the second end, and a thirteenth sub-resonance current between the third end and the fourth end, the current intensity of the thirteenth sub-resonance current is greater than the current intensity of the twelfth sub-resonance current, the current direction of the thirteenth sub-resonance current is the same as the current direction of the twelfth sub-resonance current, and the mode of the thirteenth sub-resonance current is a 1 / 4 wavelength mode of the seventh frequency band.

16. The electronic device according to claim 15, characterized in that: The center frequency of the fifth frequency band is smaller than the center frequency of the sixth frequency band, the center frequency of the sixth frequency band is smaller than the center frequency of the seventh frequency band, and the fifth frequency band, the sixth frequency band and the seventh frequency band form a continuous frequency band that can cover a bandwidth greater than or equal to 1 GHz.

17. The electronic device according to claim 12, characterized in that: The distance between the feeding point and the first end is (1 / 4 to 1 / 2) of the total length of the first radiator.

18. The electronic device according to any one of claims 1 to 17, characterized in that: The electronic device also includes a frame, and the first radiator also includes a first radiating section and a second radiating section connected to each other. The first radiating section and the second radiating section are respectively arranged on two adjacent connecting edges on the frame, and the SAR hotspot generated by the first radiator when sending and receiving electromagnetic wave signals is distributed to the sides where the two connecting edges are located.

19. The electronic device according to any one of claims 1 to 17, characterized in that: The electronic device also includes a reference floor, and the distance between the position where the first switch circuit is electrically connected to the reference floor and the connection point of two adjacent edges intersecting on the reference floor is less than 1 / 8 wavelength corresponding to the frequency band supported by the antenna assembly.

20. The electronic device according to any one of claims 1 to 17, characterized in that: At least one of the first switching circuit and the second switching circuit also includes a tuning circuit, one end of the tuning circuit is electrically connected to the first end, and the other end of the tuning circuit is grounded, and the tuning circuit is used to switch a sub-band in the frequency band supported by the antenna assembly.

Images