Electronic device

Abstract

The invention provides electronic equipment. The electronic equipment comprises a frame, a first antenna unit and a second antenna unit, the first antenna unit comprises a first antenna radiator and a first feed source, one end of a first radiation section of the first antenna radiator forms a free end, the other end of the first radiation section is coupled with one end of a first parasitic section, and the other end of the first parasitic section is grounded; the first radiation section is provided with a first feeding point electrically connected with the first feed source and a grounding point which is located on the side, facing the free end, of the first feeding point and is grounded. The first antenna radiator supports a first mid-high frequency band. The second antenna unit comprises a second antenna radiator and a second feed source, one end of a second radiation section of the second antenna radiator is grounded, the other end of the second radiation section is coupled with one end of a second parasitic section, the other end of the second parasitic section is grounded, and the second radiation section is provided with a second feed point electrically connected with the second feed source; the second antenna radiator supports a first low frequency band. The electronic device can give consideration to both cost and miniaturization.

Description

Technical Field

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

[0002] In the related art, the mid- and high-frequency antenna units of electronic devices introduce more switching circuits to achieve multi-frequency and / or broadband performance, which increases the cost of the electronic devices. In addition, the low-frequency antenna units of electronic devices are longer and occupy a larger space. Summary of the invention

[0003] The present application provides an electronic device that can balance cost and miniaturization.

[0004] Specifically, the present application provides an electronic device, including:

[0005] A frame, comprising a first sub-frame and a second sub-frame connected by bending;

[0006] A first antenna unit, comprising a first antenna radiator and a first feed source provided on the first sub-frame, wherein the first antenna radiator comprises a first radiating section and a first parasitic section, wherein one end of the first radiating section forms a free end, the other end of the first radiating section forms a first coupling end, one end of the first parasitic section forms a second coupling end, the other end of the first parasitic section forms a first grounding end, a first coupling gap is formed between the second coupling end and the first coupling end, the first grounding end is grounded, the first radiating section is provided with a first feeding point and a grounding point located on a side of the first feeding point facing the free end, the first feeding point is electrically connected to the first feed source, and the grounding point is grounded; the first antenna radiator generates at least a first resonant mode supporting a first medium and high frequency band under the excitation of the first feed source; and

[0007] The second antenna unit includes a second antenna radiator and a second feed source, which are arranged at one end of the second sub-frame close to the first sub-frame, the second antenna radiator includes a second radiating section and a second parasitic section, one end of the second radiating section forms a first connecting end, the other end of the second radiating section forms a third coupling end, one end of the second parasitic section forms a fourth coupling end, the other end of the second parasitic section forms a second grounding end, a second coupling gap is formed between the fourth coupling end and the third coupling end, the first connecting end and the second grounding end are grounded, the second radiating section has a second feeding point, and the second feeding point is electrically connected to the second feed source; the second antenna radiator generates at least a second resonant mode supporting the first low-frequency band under the excitation of the second feed source.

[0008] The electronic device provided by the present application includes a frame, a first antenna unit and a second antenna unit, the frame includes a first sub-frame and a second sub-frame that are bent and connected, the first antenna unit includes a first antenna radiator and a first feed source arranged in the first sub-frame, because the first antenna radiator includes a first radiating section and a first parasitic section, one end of the first radiating section forms a free end, the other end of the first radiating section forms a first coupling end, one end of the first parasitic section forms a second coupling end, the other end of the first parasitic section forms a first grounding end, a first coupling gap is formed between the second coupling end and the first coupling end, the first grounding end is grounded, the first radiating section has a first feeding point and a grounding point, the first feeding point is electrically connected to the first feed source, and the grounding point is grounded; the first antenna radiator generates at least a first resonant mode supporting a first medium and high frequency band under the excitation of the first feed source, that is, the first antenna unit of the present application forms a T-shaped antenna through the first radiating section, and the loop antenna formed by the first radiating section between the first parasitic section and the grounding point to the first coupling end generates a first resonant mode supporting the first medium and high frequency band, which can reduce the switching circuit in the first antenna unit while achieving broadband performance, thereby reducing the cost of the electronic device. The second antenna unit includes a second antenna radiator and a second feed source, which are arranged at one end of the second sub-frame close to the first sub-frame. The second antenna radiator includes a second radiating section and a second parasitic section. One end of the second radiating section forms a first connecting end, the other end of the second radiating section forms a third coupling end, one end of the second parasitic section forms a fourth coupling end, the other end of the second parasitic section forms a second grounding end, and a second coupling gap is formed between the fourth coupling end and the third coupling end. The first connecting end and the second grounding end are grounded, the second radiating section has a second feeding point, and the second feeding point is electrically connected to the second feed source. The second antenna radiator generates at least a second resonant mode supporting the first low-frequency band under the excitation of the second feed source, that is, the second antenna unit of the present application generates a second resonant mode supporting the first low-frequency band through the ring antenna formed by the second radiating section and the second parasitic section, which can reduce the length of the second antenna unit while achieving support for the low-frequency band, thereby reducing the occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] 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.

[0010] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0011] Figure 2 for Figure 1 A schematic diagram of the structure of a first antenna unit and a second antenna unit in the electronic device shown;

[0012] Figure 3 for Figure 2A schematic structural diagram of a first antenna radiator in the electronic device shown, in which one end of the first radiating section forms a free end, the other end of the first radiating section forms a first coupling end, one end of the first parasitic section forms a second coupling end, and the other end of the first parasitic section forms a first grounding end;

[0013] Figure 4 for Figure 2 A schematic diagram showing a structure in which one end of the second radiation section of the second antenna radiator in the electronic device forms a first connection end, and the other end of the second radiation section forms a third coupling end. One end of the second parasitic section forms a fourth coupling end, and the other end of the second parasitic section forms a second grounding end;

[0014] Figure 5 for Figure 2 The first antenna unit of the electronic device shown also includes a structural schematic diagram of a first tuning circuit;

[0015] Figure 6 for Figure 5 A schematic structural diagram of the first tuning circuit shown;

[0016] Figure 7 for Figure 5 A schematic structural diagram of a first radiating section of the electronic device shown being electrically connected to a first feed source and a reference ground via a first tuning circuit;

[0017] Figure 8 for Figure 5 A schematic diagram of the distribution of the resonant current corresponding to the first resonant mode of the electronic device shown;

[0018] Fig. 9 for Figure 5 A schematic diagram of the distribution of the resonant current corresponding to the third resonant mode of the electronic device shown;

[0019] Fig.10 for Figure 5 A graph showing return loss, radiation efficiency and system efficiency of the first antenna unit in the electronic device;

[0020] Fig.11 for Figure 5 The second antenna unit of the electronic device shown also includes a structural schematic diagram of a second tuning circuit;

[0021] Fig.12 for Fig.11 A schematic diagram of a structure in which a second radiating section of the electronic device is electrically connected to a second feed source and a reference ground via a second tuning circuit;

[0022] Fig.13 for Fig.12 A schematic diagram of the distribution of the resonant current corresponding to the second resonant mode of the electronic device shown;

[0023] Fig.14 for Fig.12 A schematic diagram of the distribution of the resonant current corresponding to the fourth resonant mode of the electronic device shown;

[0024] Fig.15 for Fig.12 A graph showing return loss, radiation efficiency and system efficiency of a second antenna unit in the electronic device;

[0025] Fig.16 for Figure 1 The electronic device shown also includes a structural schematic diagram of a third antenna unit;

[0026] Fig.17 for Fig.16 A schematic diagram of the structure of a first antenna unit, a second antenna unit and a third antenna unit in the electronic device shown;

[0027] Fig.18 for Fig.17 A schematic diagram of a structure in which one end of a third radiating section of a third antenna radiator in the electronic device forms a second connection end, the other end of the third radiating section forms a fifth coupling end, one end of a third parasitic section forms a sixth coupling end, and the other end of the third parasitic section forms a third grounding end;

[0028] Fig.19 for Fig.18 The third antenna unit of the electronic device shown also includes a structural schematic diagram of a third tuning circuit;

[0029] Fig. 20 for Fig.19 A schematic diagram of a structure in which a third radiating section of the electronic device can be electrically connected to a third feed source and a reference ground through a third tuning circuit;

[0030] Fig.21 for Fig. 20 A schematic diagram of the distribution of the resonant current corresponding to the fifth resonant mode of the electronic device shown;

[0031] Fig. 22 for Fig. 20 A schematic diagram of the distribution of the resonant current corresponding to the sixth resonant mode of the electronic device shown;

[0032] Fig.23 for Fig. 20 A schematic diagram of the distribution of the resonant current corresponding to the seventh resonant mode of the electronic device shown;

[0033] Fig.24 for Fig. 20 A graph showing return loss, radiation efficiency and system efficiency of the third antenna unit in the electronic device;

[0034] Fig.25 for Fig. 20A schematic structural diagram of the electronic device shown is that the first connection end is close to the first floor corner point, and the second connection end is close to the second floor corner point.

[0035] Description of reference numerals:

[0036] Electronic device 100; first antenna unit 10; second antenna unit 20; frame 40; reference floor 50; first sub-frame 401; second sub-frame 402; third sub-frame 403; fourth sub-frame 404; first antenna radiator 101; first feed source 102; first radiation section 110; first parasitic section 111; free end 1101; first coupling end 1102; second coupling end 1110; first grounding end 1112; first coupling gap 103; first feeding point 1103; grounding point 1104; second antenna radiator 201; second feed source 202; second radiation section 210; second parasitic section 211; first connection end 2101; third coupling end 2102; fourth coupling end 2110; second grounding end 2111; second coupling gap 203; second feeding point 2103; first tuning circuit 104; second tuning circuit 204; third antenna unit 30; third antenna radiator 301; third feed source 302; third radiation section 310; third parasitic section 311; second connection end 3101; fifth coupling end 3102; sixth coupling end 3110; third grounding end 3111; third coupling gap 303; third feeding point 3103; third tuning circuit 304; first grounding edge 501; second grounding edge 502; third grounding edge 503; first floor corner point 504; second floor corner point 505. DETAILED DESCRIPTION

[0037] The technical solution provided by the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0038] References to "embodiments" and "implementations" in this application mean that the specific features, structures, or characteristics described in conjunction with the embodiments or implementations 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.

[0039] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned description of the drawings are used to distinguish different objects rather than to describe a specific order; the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. In addition, the terms "end" and "point" in the specification and claims of this application and the above-mentioned description of the drawings may indicate a small section of the antenna radiator relative to the antenna radiator as a whole, that is, "end" cannot be narrowly understood as an end, and "point" cannot be narrowly understood as a point.

[0040] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of an electronic device 100 provided in an embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of the structure of the first antenna unit 10 and the second antenna unit 20 in the electronic device 100 shown. The electronic device 100 can be a mobile phone, a tablet, a computer or other device with communication functions. In the embodiment of the present application, the electronic device 100 takes a mobile phone as an example. The electronic device 100 includes a frame 40, a reference floor 50, a first antenna unit 10 and a second antenna unit 20. Of course, the electronic device 100 may also include a circuit board, a display screen, a battery, a camera module, etc.

[0041] Among them, the frame 40 can be a metal frame; it can also be a non-metal frame, such as a plastic frame, etc. The frame 40 includes a first sub-frame 401 and a second sub-frame 402 that are connected by bending. The present application does not specifically limit the bending connection method between the first sub-frame 401 and the second sub-frame 402. For example: the first sub-frame 401 and the second sub-frame 402 can be connected by bending at a right angle; or, the first sub-frame 401 and the second sub-frame 402 can be connected by bending at a rounded angle. The frame 40 is surrounded to form a receiving space. In a possible embodiment, the width direction of the electronic device 100 can refer to the X-axis direction in the accompanying drawings; the length direction of the electronic device 100 can refer to the Y-axis direction in the accompanying drawings. The frame 40 includes a first sub-frame 401, a second sub-frame 402, a third sub-frame 403 and a fourth sub-frame 404. The first sub-frame 401, the second sub-frame 402, the fourth sub-frame 404 and the third sub-frame 403 are connected end to end in sequence. The first sub-frame 401 and the fourth sub-frame 404 are arranged oppositely along the length direction of the electronic device 100, and the first sub-frame 401 is the bottom frame of the electronic device 100; the fourth sub-frame 404 is the top frame of the electronic device 100. The second sub-frame 402 and the third sub-frame 403 are arranged oppositely along the width direction of the electronic device 100, and the second sub-frame 402 is the left frame of the electronic device 100, and the third sub-frame 403 is the right frame of the electronic device 100. It can be understood that the second sub-frame 402 and the third sub-frame 403 are located on both sides of the first sub-frame 401. The first sub-frame 401, the second sub-frame 402, the third sub-frame 403 and the fourth sub-frame 404 are surrounded to form a receiving space. In the embodiment of the present application, the first sub-frame 401 and the fourth sub-frame 404 are relatively short; the second sub-frame 402 and the third sub-frame 403 are relatively long. Of course, in other possible implementations, the first sub-frame 401 may also be the top frame of the electronic device 100, and the fourth sub-frame 404 may also be the bottom frame of the electronic device 100; or, the second sub-frame 402 may also be the right frame of the electronic device 100, and the third sub-frame 403 may also be the left frame of the electronic device 100.

[0042] The reference floor 50 refers to a portion of the electronic device 100 that is not affected by any grounding configuration and is considered to be a conductive earth. The potential of the reference floor 50 is agreed to be zero. For example, the reference floor 50 may include a grounding layer of a main circuit board, a grounding layer of a secondary circuit board, a metal part of a middle frame, and a conductive part electrically connected to one or more of the grounding layer of the main circuit board, the grounding layer of the secondary circuit board, and the metal part of the middle frame in the electronic device 100. The reference floor 50 is disposed in a space enclosed by the frame 40.

[0043] Please refer to Figure 1 and Figure 2, the first antenna unit 10 includes a first antenna radiator 101 and a first feed source 102 provided on the first sub-frame 401. In the present application, the first antenna radiator 101 provided on the first sub-frame 401 can be understood as the first antenna radiator 101 being integrated on the first sub-frame 401; or, it can also be understood as the first antenna radiator 101 being provided on the inner side of the first sub-frame 401; or, it can also be understood as the first antenna radiator 101 being provided relatively close to the first sub-frame 401. In other words, the first antenna radiator 101 can be a frame antenna radiator or a built-in antenna radiator. The material of the first antenna radiator 101 can be metal, alloy, etc. The first feed source 102 can be understood as a port of the first antenna unit 10 on the circuit board for electrically connecting the RF chip. The first feed source 102 is provided in the receiving space formed by the frame 40. For example: the first feed source 102 can be provided on the circuit board and close to the first antenna radiator 101. The first feed source 102 is electrically connected to the RF chip and can receive the first excitation current provided by the RF chip.

[0044] Please refer to Figure 2 and Figure 3, the first antenna radiator 101 includes a first radiating section 110 and a first parasitic section 111. The present application does not specifically limit the material of the first radiating section 110, the width of the first radiating section 110, the material of the first parasitic section 111, and the width of the first parasitic section 111. The material of the first radiating section 110 and the material of the first parasitic section 111 may be the same or different. The width of the first radiating section 110 and the width of the first parasitic section 111 may be the same or different. In the following implementation, the material of the first radiating section 110 and the material of the first parasitic section 111 are the same, and the width of the first radiating section 110 and the width of the first parasitic section 111 are the same as an example. One end of the first radiating section 110 forms a free end 1101, and the other end of the first radiating section 110 forms a first coupling end 1102. One end of the first parasitic section 111 forms a second coupling end 1110, and the other end of the first parasitic section 111 forms a first grounding end 1112. A first coupling gap 103 is formed between the second coupling end 1110 and the first coupling end 1102. It can be understood that the free end 1101, the first coupling end 1102, the second coupling end 1110, and the first grounding end 1112 are arranged in sequence. The size of the first coupling gap 103 can be 0.5mm to 2mm. The first radiating section 110 and the first parasitic section 111 can achieve mutual transmission of radiation energy through the first coupling gap 103. The first grounding end 1112 is grounded. Among them, the "free end" can be understood as an end that is not electrically connected to the conductive part or has an isolation gap between the conductive part. The "coupled end" can be understood as an end that can achieve mutual transmission of radiation energy with another coupled end. The "grounding end" can be understood as an end that is directly or indirectly electrically connected to the reference floor 50. The meanings of the "free end", "coupled end", and "grounding end" in the following embodiments are the same as the above description and will not be repeated later.

[0045] The first radiating section 110 is provided with a first feeding point 1103 and a grounding point 1104 located on the side of the first feeding point 1103 facing the free end 1101. The first feeding point 1103 may be located at the first coupling end 1102; or, the first feeding point 1103 may be located between the first coupling end 1102 and the free end 1101. In a possible implementation, the grounding point 1104 may be arranged at intervals between the first feeding point 1103 and the free end 1101. Specifically, the free end 1101, the grounding point 1104, the first feeding point 1103 and the first coupling end 1102 are arranged at intervals in sequence. The spacing distance between the grounding point 1104 and the free end 1101 may be greater than the spacing distance between the grounding point 1104 and the first feeding point 1103. In another possible implementation, the grounding point 1104 may coincide with the first feeding point 1103. The first feeding point 1103 is electrically connected to the first feed source 102. The grounding point 1104 is grounded. The first feed point 1103 and the first feed source 102 may be directly electrically connected, or indirectly electrically connected through an electrical connector such as a metal spring. The grounding point 1104 and the reference floor 50 may be directly electrically connected, or indirectly electrically connected through an electrical connector such as a metal spring. The first antenna radiator 101 generates at least a first resonant mode supporting the first medium and high frequency band under the excitation of the first feed source 102. It can be understood that the first antenna unit 10 can support the first medium and high frequency band. The first medium and high frequency band may be any one of the medium and high frequency bands (1GHz to 3GHz). For example: the first medium and high frequency band may include one or more of the B1 band (1.92GHz to 2.17GHz), the B3 band (1.71GHz to 1.88GHz), the B40 band (2.3GHz to 2.4GHz), and the B41 band (2.49GHz to 2.69GHz).

[0046] Please refer to Figure 1 and Figure 2, the second antenna unit 20 includes a second antenna radiator 201 and a second feed source 202, which are arranged at one end of the second sub-frame 402 close to the first sub-frame 401. In the present application, the second antenna radiator 201 is arranged on the second sub-frame 402, which can be understood as the second antenna radiator 201 is integrated on the second sub-frame 402; or, it can also be understood as the second antenna radiator 201 is arranged on the inner side of the second sub-frame 402; or, it can also be understood as the second antenna radiator 201 is arranged relatively close to the second sub-frame 402. In other words, the second antenna radiator 201 can be a frame antenna radiator or a built-in antenna radiator. The material of the second antenna radiator 201 can be metal, alloy, etc. The second feed source 202 can be understood as the port of the second antenna unit 20 on the circuit board for electrically connecting the radio frequency chip. The second feed source 202 is arranged in the receiving space formed by the frame 40. For example: the second feed source 202 can be arranged on the circuit board and close to the second antenna radiator 201. The second feed source 202 is electrically connected to the radio frequency chip and can receive a second excitation current provided by the radio frequency chip.

[0047] Please refer to Figure 2 and Figure 4 , the second antenna radiator 201 includes a second radiating section 210 and a second parasitic section 211. The present application does not specifically limit the material of the second radiating section 210, the width of the second radiating section 210, the material of the second parasitic section 211, and the width of the second parasitic section 211. The material of the second radiating section 210 and the material of the second parasitic section 211 may be the same or different. The width of the second radiating section 210 and the width of the second parasitic section 211 may be the same or different. In the following embodiments, the material of the second radiating section 210 and the material of the second parasitic section 211 are the same, and the width of the second radiating section 210 and the width of the second parasitic section 211 are the same as an example. One end of the second radiating section 210 forms a first connecting end 2101, and the other end of the second radiating section 210 forms a third coupling end 2102. One end of the second parasitic section 211 forms a fourth coupling end 2110, and the other end of the second parasitic section 211 forms a second grounding end 2111. A second coupling gap 203 is formed between the fourth coupling end 2110 and the third coupling end 2102. It can be understood that the first connection end 2101, the third coupling end 2102, the fourth coupling end 2110, and the second grounding end 2111 are arranged in sequence. The size of the second coupling gap 203 can be 0.5 mm to 2 mm. The second radiation section 210 and the second parasitic section 211 can achieve mutual transmission of radiation energy through the second coupling gap 203. The first connection end 2101 and the second grounding end 2111 are grounded.

[0048] The second radiation section 210 has a second feeding point 2103. The second feeding point 2103 may be located at the first connection end 2101; or, the second feeding point 2103 may be located at the third coupling end 2102; or, the second feeding point 2103 may be located between the first connection end 2101 and the third coupling end 2102. In a possible implementation, the second feeding point 2103 is provided at the first connection end 2101. By providing the second feeding point 2103 at the first connection end 2101, it is beneficial to excite all the second radiation sections 210 to generate corresponding resonant currents, thereby facilitating shortening the length of the second radiation section 210. The second feeding point 2103 is electrically connected to the second feed source 202; the second antenna radiator 201 generates at least a second resonant mode supporting the first low frequency band under the excitation of the second feed source 202. It can be understood that the second antenna unit 20 can support the first low frequency band. The first low frequency band can be any frequency band in the low frequency band (less than 1 GHz). For example, the first low frequency band may be one of the B5 band (0.82 GHz to 0.89 GHz), the B8 band (0.88 GHz to 0.96 GHz), the B20 band (0.79 GHz to 0.86 GHz), and the B28 band (0.7 GHz to 0.8 GHz).

[0049] The electronic device 100 provided in the present application includes a frame 40, a first antenna unit 10 and a second antenna unit 20, the frame 40 includes a first sub-frame 401 and a second sub-frame 402 that are bent and connected, the first antenna unit 10 includes a first antenna radiator 101 and a first feed source 102 arranged on the first sub-frame 401, since the first antenna radiator 101 includes a first radiating section 110 and a first parasitic section 111, one end of the first radiating section 110 forms a free end 1101, the other end of the first radiating section 110 forms a first coupling end 1102, one end of the first parasitic section 111 forms a second coupling end 1110, the other end of the first parasitic section 111 forms a first grounding end 1112, and a first coupling end 1110 is formed between the second coupling end 110 and the first coupling end 1102. The gap 103, the first grounding end 1112 is grounded, the first radiating section 110 has a first feeding point 1103 and a grounding point 1104, the first feeding point 1103 is electrically connected to the first feed source 102, and the grounding point 1104 is grounded; the first antenna radiator 101 generates at least a first resonant mode supporting the first medium and high frequency band under the excitation of the first feed source 102, that is, the T-shaped antenna formed by the first antenna unit 10 of the present application through the first radiating section 110, and the loop antenna formed by the first radiating section 110 between the first parasitic section 111 and the grounding point 1104 to the first coupling end 1102 generate a first resonant mode supporting the first medium and high frequency band, which can reduce the switching circuit in the first antenna unit 10 while achieving broadband performance, thereby reducing the cost of the electronic device 100. The second antenna unit 20 includes a second antenna radiator 201 and a second feed source 202, which are arranged at one end of the second sub-frame 402 close to the first sub-frame 401. The second antenna radiator 201 includes a second radiating section 210 and a second parasitic section 211. One end of the second radiating section 210 forms a first connecting end 2101, the other end of the second radiating section 210 forms a third coupling end 2102, one end of the second parasitic section 211 forms a fourth coupling end 2110, the other end of the second parasitic section 211 forms a second grounding end 2111, and a second coupling end 2110 is formed between the fourth coupling end 2110 and the third coupling end 2102. The gap 203, the first connection end 2101 and the second grounding end 2111 are grounded, the second radiation section 210 has a second feeding point 2103, and the second feeding point 2103 is electrically connected to the second feed source 202; the second antenna radiator 201 generates at least a second resonant mode supporting the first low-frequency band under the excitation of the second feed source 202, that is, the second antenna unit 20 of the present application generates a second resonant mode supporting the first low-frequency band through the ring antenna formed by the second radiation section 210 and the second parasitic section 211, which can reduce the length of the second antenna unit 20 while achieving support for the low-frequency band, thereby reducing the occupied space.

[0050] In a possible embodiment, Figure 5As shown, the first antenna unit 10 further includes a first tuning circuit 104. The first tuning circuit 104 is electrically connected between the first feeding point 1103 and the first feed source 102. Under the action of the first feed source 102 and the first tuning circuit 104, the first antenna radiator 101 generates a first resonance mode and a third resonance mode supporting a second mid-high frequency band.

[0051] The first tuning circuit 104 and the first feeding point 1103 may be directly or indirectly electrically connected. The first tuning circuit 104 and the first feed source 102 may be directly or indirectly electrically connected. The first tuning circuit 104 may include capacitors and / or inductors, etc. The present application does not specifically limit the number of capacitors and the number of inductors included in the first tuning circuit 104. When the first tuning circuit 104 includes multiple capacitors, the multiple capacitors may be connected in series or in parallel. When the first tuning circuit 104 includes multiple inductors, the multiple inductors may be connected in series or in parallel. When the first tuning circuit 104 includes one or more capacitors and one or more inductors, the inductors and capacitors may be connected in series or in parallel.

[0052] Optional, such as Figure 6 As shown in a, the first tuning circuit 104 may include a capacitor and an inductor connected in series. Figure 6 As shown in FIG. 1 b, the first tuning circuit 104 may also include a capacitor and an inductor connected in parallel. Figure 6 As shown in Figure c, the first tuning circuit 104 may also include an inductor, a first capacitor and a second capacitor, wherein the inductor is connected in parallel with the first capacitor and then in series with the second capacitor. Figure 6 As shown in FIG. d, the first tuning circuit 104 may also include a first inductor, a second inductor and a capacitor, wherein the first inductor and the capacitor are connected in parallel and then in series with the second inductor. Figure 6 As shown in FIG. 5 , the first tuning circuit 104 may also include an inductor, a first capacitor and a second capacitor. The inductor is connected in series with the first capacitor and then connected in parallel with the second capacitor. Figure 6 As shown in FIG. 5 , the first tuning circuit 104 may also include a first inductor, a second inductor and a capacitor, wherein the first inductor and the capacitor are connected in series and then in parallel with the second inductor. Figure 6 As shown in FIG. 1 , the first tuning circuit 104 may also include a first sub-tuning circuit formed by connecting a first inductor and a first capacitor in parallel, and a second sub-tuning circuit formed by connecting a second inductor and a second capacitor in parallel, and the first sub-tuning circuit and the second sub-tuning circuit are connected in series. Figure 6 As shown in h, the first tuning circuit 104 may also include a third sub-tuning circuit formed by a first inductor and a first capacitor connected in series, and a fourth sub-tuning circuit formed by a second inductor and a second capacitor connected in series, and the third sub-tuning circuit is connected in parallel with the fourth sub-tuning circuit.

[0053] The second mid-high frequency band may be any mid-high frequency band that is different from the first mid-high frequency band. For example, the first mid-high frequency band may include one or more of the B1 band and the B3 band, and the second mid-high frequency band may include one or more of the B40 band and the B41 band; or, the first mid-high frequency band may include one or more of the B40 band and the B41 band, and the second mid-high frequency band may include one or more of the B1 band and the B3 band.

[0054] The setting of the first tuning circuit 104 can change the equivalent electrical length of the first antenna radiator 101. For example, connecting a capacitive tuning circuit can reduce the equivalent electrical length of the first antenna radiator 101; and connecting an inductive tuning circuit can increase the effective electrical length of the first antenna radiator 101. Therefore, by making the first antenna unit 10 also include the first tuning circuit 104, the first tuning circuit 104 is electrically connected between the first feeding point 1103 and the first feed source 102, and the first antenna radiator 101 generates a first resonant mode under the action of the first feed source 102 and the first tuning circuit 104, the length of the first antenna radiator 101 can be adjusted accordingly, so as to take into account the length design and radiation performance of the first antenna radiator 101. In addition, by making the first antenna unit 10 also include a first tuning circuit 104, the first tuning circuit 104 is electrically connected between the first feeding point 1103 and the first feed source 102, the first antenna radiator 101 also generates a third resonant mode supporting the second mid-high frequency band under the action of the first feed source 102 and the first tuning circuit 104, which can expand the mid-high frequency band covered by the first antenna unit 10, and realize the first antenna unit 10 Support for multiple mid-high frequency bands and / or support for broadband mid-high frequency bands.

[0055] In this embodiment, Figure 7 As shown, the first feeding point 1103 may coincide with the grounding point 1104 , that is, the first radiating section 110 may be electrically connected to the first feed source 102 and the reference ground 50 through the first tuning circuit 104 .

[0056] Among them, one of the first resonance mode and the third resonance mode includes a 1 / 2 wavelength mode generated in the first radiation section 110, and generates a resonance current in the same direction in the first parasitic section 111, and the other of the first resonance mode and the third resonance mode includes a 1 / 4 wavelength mode generated in the first parasitic section 111, and generates a resonance current in the opposite direction in the first radiation section 110 between the ground point 1104 and the first coupling end 1102. The second resonance mode includes a 1 / 4 wavelength mode generated in the second radiation section 210 between the second feeding point 2103 and the third coupling end 2102, and generates a resonance current in the same direction in the second parasitic section 211. The "wavelength" in the 1 / 2 wavelength mode and the 1 / 4 wavelength mode refers to the wavelength corresponding to the frequency band supported by the corresponding resonance mode.

[0057] In a possible embodiment, Figure 8 As shown, the first resonance mode includes a 1 / 2 wavelength mode generated in the first radiation section 110, and generates a resonance current in the same direction in the first parasitic section 111. The 1 / 2 wavelength in the 1 / 2 wavelength mode in this embodiment is the 1 / 2 wavelength corresponding to the frequency band supported by the first resonance mode. The first resonance mode generates a resonance current in the same direction in the first parasitic section 111, which means that the first resonance mode generates a resonance current in the first parasitic section 111, and the direction of the resonance current generated by the first resonance mode in the first parasitic section 111 is the same as the direction of the resonance current generated by the first resonance mode in the first radiation section 110. Figure 8 The dashed line in the middle shows the resonant current corresponding to the first resonant mode. Figure 8 It can be seen from the dotted line that the resonant current corresponding to the first resonant mode includes the resonant current I1 between the free end 1101 and the first coupling end 1102 of the first radiation segment 110, and the parasitic current I2 between the second coupling end 1110 and the first grounding end 1112 of the first parasitic segment 111. The flow direction of the parasitic current I2 is the same as that of the resonant current I1. The intensity of the parasitic current I2 is weaker than the intensity of the resonant current I1. In this embodiment, the equivalent electrical length of the first radiation segment 110 is approximately 1 / 2 wavelength of the first medium and high frequency band. For example: the length of the first radiation segment 110 can be 20mm to 70mm. The length of the first radiation segment 110 between the grounding point 1104 and the first feeding point 1103 can be less than or equal to 1 / 4 of the length of the first radiation segment 110, that is, the length of the first radiation segment 110 between the grounding point 1104 and the first feeding point 1103 can be less than or equal to 17mm. In other words, the length of the first radiation segment 110 between the ground point 1104 and the first feeding point 1103 may be less than or equal to 1 / 8 of the wavelength of the first medium-high frequency band.

[0058] like Fig. 9 As shown, the third resonance mode includes a 1 / 4 wavelength mode generated in the first parasitic section 111, and generates a reverse resonance current in the first radiation section 110 between the grounding point 1104 and the first coupling end 1102. The 1 / 4 wavelength in the 1 / 4 wavelength mode in this embodiment is the 1 / 4 wavelength corresponding to the frequency band supported by the third resonance mode. The third resonance mode generates a reverse resonance current in the first radiation section 110 between the grounding point 1104 and the first coupling end 1102, which means that the third resonance mode generates a resonance current on the first radiation section 110 between the grounding point 1104 and the first coupling end 1102, and the direction of the resonance current generated by the third resonance mode on the first radiation section 110 between the grounding point 1104 and the first coupling end 1102 is opposite to the direction of the resonance current generated by the third resonance mode in the first parasitic section 111. Fig. 9The middle dashed line shows the resonant current corresponding to the third resonant mode. Fig. 9 It can be seen from the dotted line that the resonant current corresponding to the third resonant mode includes the resonant current I3 between the second coupling end 1110 and the first grounding end 1112 of the first parasitic segment 111, and the parasitic current I4 between the grounding point 1104 and the first coupling end 1102 of the first radiation segment 110. The flow direction of the parasitic current I4 is opposite to that of the resonant current I3. The intensity of the parasitic current I4 is weaker than that of the resonant current I3. In this embodiment, the equivalent electrical length of the first parasitic segment 111 is approximately 1 / 4 wavelength of the second medium and high frequency band. For example: the length of the first parasitic segment 111 can be 10mm to 40mm.

[0059] By making one of the first resonance mode and the third resonance mode include a 1 / 2 wavelength mode generated in the first radiation segment 110 and generate a resonant current in the same direction in the first parasitic segment 111, and the other of the first resonance mode and the third resonance mode include a 1 / 4 wavelength mode generated in the first parasitic segment 111 and generate a resonant current in the opposite direction in the first radiation segment 110 between the grounding point 1104 and the first coupling end 1102, broadband performance in the first mid-high frequency band and the second mid-high frequency band can be achieved.

[0060] like Fig.10 As shown, Fig.10 for Figure 5 The return loss, radiation efficiency and system efficiency curves of the first antenna unit 10 in the electronic device 100 are shown. Fig.10 The middle curve 1 is a return loss curve of the first antenna unit 10 . Fig.10 The middle curve 2 is a radiation efficiency curve of the first antenna unit 10 . Fig.10 The middle curve 3 is the total efficiency curve of the first antenna unit 10. Fig.10 It can be seen from the middle curve 1 that the first antenna unit 10 can support the first medium and high frequency band of 1.5GHz to 2.2GHz, and can support the second medium and high frequency band of 2.2GHz to 3GHz. The center frequency of the first medium and high frequency band is 1.8444GHz. The center frequency of the second medium and high frequency band is 2.7019GHz. The bandwidth of the first medium and high frequency band is close to 0.7GHz. The bandwidth of the second medium and high frequency band is close to 0.8GHz. Both the first medium and high frequency band and the second medium and high frequency band have a wider bandwidth. The first resonant mode and the third resonant mode generated by the first antenna unit 10 enable the first antenna unit 10 to basically cover the entire medium and high frequency band. Therefore, the first antenna unit 10 provided in the present application does not need to introduce other switching circuits, which can reduce the cost of the electronic device 100.

[0061] In a possible embodiment, Fig.11As shown, the second antenna unit 20 also includes a second tuning circuit 204. The second tuning circuit 204 is electrically connected between the second feeding point 2103 and the second feed source 202. Under the action of the second feed source 202 and the second tuning circuit 204, the second antenna radiator 201 generates a second resonance mode and a fourth resonance mode supporting the third medium and high frequency band.

[0062] The second tuning circuit 204 and the second feeding point 2103 may be directly or indirectly electrically connected. The second tuning circuit 204 and the second feed source 202 may be directly or indirectly electrically connected. The second tuning circuit 204 may include capacitors and / or inductors, etc. The present application does not specifically limit the number of capacitors and the number of inductors included in the second tuning circuit 204. When the second tuning circuit 204 includes multiple capacitors, the multiple capacitors may be connected in series or in parallel. When the second tuning circuit 204 includes multiple inductors, the multiple inductors may be connected in series or in parallel. When the second tuning circuit 204 includes one or more capacitors and one or more inductors, the inductors and capacitors may be connected in series or in parallel. The structural diagram of the second tuning circuit 204 can be found in the attached diagram above. Figure 6 As shown in a~h.

[0063] The third medium and high frequency band may be any medium and high frequency band that is different from the first medium and high frequency band and the second medium and high frequency band. For example, the third medium and high frequency band may be located between the first medium and high frequency band and the second medium and high frequency band; or, the third medium and high frequency band may be lower than the first medium and high frequency band and lower than the second medium and high frequency band; or, the third medium and high frequency band may partially overlap with the first medium and high frequency band and the second medium and high frequency band, but the first medium and high frequency band and the second medium and high frequency band may be 4G bands, and the third medium and high frequency band may be 5G bands.

[0064] Similarly, the second tuning circuit 204 can be set to change the equivalent electrical length of the second antenna radiator 201. Therefore, by making the second antenna unit 20 also include the second tuning circuit 204, the second tuning circuit 204 is electrically connected between the second feeding point 2103 and the second feed source 202, the second antenna radiator 201 generates a second resonance mode under the action of the second feed source 202 and the second tuning circuit 204, and the length of the second antenna radiator 201 can be adjusted accordingly, so as to take into account the length design and radiation performance of the second antenna radiator 201. In addition, by making the second antenna unit 20 also include the second tuning circuit 204, the second tuning circuit 204 is electrically connected between the second feeding point 2103 and the second feed source 202, the second antenna radiator 201 also generates a fourth resonance mode supporting the third medium and high frequency band under the action of the second feed source 202 and the second tuning circuit 204, so that the number of frequency bands covered by the second antenna unit 20 can be expanded, and the second antenna unit 20 can support the low frequency band and the medium and high frequency band.

[0065] In this embodiment, Fig.12 As shown, the second feeding point 2103 may be located at the first connection end 2101 , that is, the second radiating section 210 may be electrically connected to the second feed source 202 and the reference ground 50 through the second tuning circuit 204 .

[0066] Among them, Fig.13 As shown, the second resonant mode includes a 1 / 4 wavelength mode generated by the second radiation section 210 between the second feeding point 2103 and the third coupling end 2102, and generates a resonant current in the same direction in the second parasitic section 211. The 1 / 4 wavelength in the 1 / 4 wavelength mode in this embodiment is the 1 / 4 wavelength corresponding to the frequency band supported by the second resonant mode. The second resonant mode generates a resonant current in the same direction in the second parasitic section 211, which means that the second resonant mode generates a resonant current in the second parasitic section 211, and the direction of the resonant current generated by the second resonant mode in the second parasitic section 211 is the same as the direction of the resonant current generated by the second resonant mode in the second radiation section 210 between the second feeding point 2103 and the third coupling end 2102. Fig.13 The dashed line in the middle shows the resonant current corresponding to the second resonant mode. Fig.13 The middle dotted line shows that the resonant current corresponding to the second resonant mode includes the resonant current I5 between the second feeding point 2103 of the second radiation segment 210 and the third coupling end 2102, and the parasitic current I6 between the fourth coupling end 2110 of the second parasitic segment 211 and the second ground end 2111. The flow direction of the parasitic current I6 is the same as the flow direction of the resonant current I5. The intensity of the parasitic current I6 is weaker than the intensity of the resonant current I5. In the embodiment where the second feeding point 2103 is arranged at the first connection end 2101, the second resonant mode can generate a 1 / 4 wavelength mode in the overall second radiation segment 210.

[0067] like Fig.14 As shown, the fourth resonant mode includes a 1 / 4 wavelength mode generated in the second parasitic segment 211, and generates a reverse resonant current in the second radiation segment 210. The 1 / 4 wavelength in the 1 / 4 wavelength mode in this embodiment is the 1 / 4 wavelength corresponding to the frequency band supported by the fourth resonant mode. The fourth resonant mode generates a reverse resonant current in the second radiation segment 210, which means that the fourth resonant mode generates a resonant current in the second radiation segment 210, and the direction of the resonant current generated by the fourth resonant mode in the second radiation segment 210 is opposite to the direction of the resonant current generated by the fourth resonant mode in the second parasitic segment 211. Fig.14 The middle dashed line shows the resonant current corresponding to the fourth resonant mode. Fig.14It can be seen from the dotted line that the resonant current corresponding to the fourth resonant mode includes the resonant current I7 between the fourth coupling end 2110 of the second parasitic segment 211 and the second grounding end 2111, and the parasitic current I8 between the first connection end 2101 and the third coupling end 2102 of the second radiation segment 210. The flow direction of the parasitic current I8 is opposite to that of the resonant current I7. The intensity of the parasitic current I8 is weaker than that of the resonant current I7. The third mid-high frequency band is located between the first mid-high frequency band and the second mid-high frequency band. For example: the third mid-high frequency band can be any frequency band in the range of 2.2 GHz to 2.5 GHz.

[0068] like Fig.15 As shown, Fig.15 for Fig.12 The return loss, radiation efficiency and system efficiency curves of the second antenna unit 20 in the electronic device 100 are shown. Fig.15 The middle curve 4 is a return loss curve of the second antenna unit 20 . Fig.15 The middle curve 5 is the radiation efficiency curve of the second antenna unit 20 . Fig.15 The middle curve 6 is the total efficiency curve of the second antenna unit 20. Fig.15 From the middle curve 4, it can be seen that the second antenna unit 20 can support the first low frequency band of 0.7 GHz to 0.8 GHz, and can support the third medium and high frequency band of 2.49 GHz to 2.69 GHz. The center frequency of the first low frequency band is 0.737 GHz. The center frequency of the third medium and high frequency band is 2.5549 GHz. The second resonant mode and the fourth resonant mode generated by the second antenna unit 20 can support the first low frequency band and the third medium and high frequency band, respectively.

[0069] Optionally, the first medium and high frequency band, the first low frequency band, and the second medium and high frequency band are 4G frequency bands, and the third medium and high frequency band is a 5G frequency band.

[0070] By making the T-shaped antenna formed by the first radiating section 110 of the first antenna unit 10 and the loop antenna formed by the first radiating section 110 between the first parasitic section 111 and the grounding point 1104 and the first coupling end 1102 generate the first resonance mode supporting the first medium and high frequency band and the third resonance mode supporting the second medium and high frequency band, the first antenna unit 10 can basically cover all 4G medium and high frequency bands. By making the loop antenna formed by the second radiating section 210 and the second parasitic section 211 of the second antenna unit 20 generate the second resonance mode supporting the first low frequency band and the fourth resonance mode supporting the third medium and high frequency band, the second antenna unit 20 can support low frequency communication while achieving medium and high frequency 4G and 5G dual connection compatibility, which is beneficial to the use of the electronic device 100 in the ENDC (E-UTRANR Dual-Connectivity) state.

[0071] In a possible embodiment, the length of the second radiation section 210 is less than or equal to 25 mm, and the length of the second parasitic section 211 is less than the length of the second radiation section 210. In a possible implementation manner, the length of the second radiation section 210 may be 18 mm to 22 mm. The length of the second parasitic section 211 may be 16 mm to 20 mm. Fig.15 The length of the second radiation section 210 corresponding to the return loss curve of the second antenna unit 20 shown is 22 mm. By making the length of the second radiation section 210 less than or equal to 25 mm, and the length of the second parasitic section 211 less than the length of the second radiation section 210, the length of the second antenna radiator 201 can be reduced while the second antenna unit 20 supports the first low-frequency band and the third medium-high frequency band, which is conducive to the miniaturization of the second antenna unit 20. Among them, the center frequency point of the first low-frequency band (i.e. Fig.15 The center frequency of the third mid-high frequency band (i.e. Fig.15 2 points) is slightly smaller than the resonant frequency of the 1 / 4 wavelength mode generated by the second parasitic segment 211.

[0072] For further information, please refer to Fig.16 and Fig.17 , the electronic device 100 also includes a third antenna unit 30. The third antenna unit 30 includes a third antenna radiator 301 and a third feed source 302, which are arranged at one end of the third sub-frame 403 close to the first sub-frame 401. In the present application, the third antenna radiator 301 is arranged on the third sub-frame 403, which can be understood as the third antenna radiator 301 is integrated on the third sub-frame 403; or, it can also be understood as the third antenna radiator 301 is arranged on the inner side of the third sub-frame 403; or, it can also be understood as the third antenna radiator 301 is arranged relatively close to the third sub-frame 403. In other words, the third antenna radiator 301 can be a frame 40 antenna radiator or a built-in antenna radiator. The material of the third antenna radiator 301 can be metal, alloy, etc. The third feed source 302 can be understood as a port of the third antenna unit 30 on the circuit board for electrically connecting the radio frequency chip. The third feed source 302 is arranged in the receiving space formed by the frame 40. For example: the third feed source 302 can be arranged on the circuit board and close to the third antenna radiator 301. The third feed source 302 is electrically connected to the radio frequency chip, and can receive a third excitation current provided by the radio frequency chip.

[0073] Please refer to Fig.17 and Fig.18, the third antenna radiator 301 includes a third radiating section 310 and a third parasitic section 311. The present application does not specifically limit the material of the third radiating section 310, the width of the third radiating section 310, the material of the third parasitic section 311, and the width of the third parasitic section 311. The material of the third radiating section 310 and the material of the third parasitic section 311 may be the same or different. The width of the third radiating section 310 and the width of the third parasitic section 311 may be the same or different. In the following embodiments, the material of the third radiating section 310 is the same as that of the third parasitic section 311, and the width of the third radiating section 310 is the same as that of the third parasitic section 311. One end of the third radiating section 310 forms a second connection end 3101, the other end of the third radiating section 310 forms a fifth coupling end 3102, one end of the third parasitic section 311 forms a sixth coupling end 3110, and the other end of the third parasitic section 311 forms a third grounding end 3111. A third coupling gap 303 is formed between the sixth coupling end 3110 and the fifth coupling end 3102. It can be understood that the second connection end 3101, the fifth coupling end 3102, the sixth coupling end 3110, and the third grounding end 3111 are arranged in sequence. The size of the third coupling gap 303 can be 0.5 mm to 2 mm. The third radiation section 310 and the third parasitic section 311 can achieve mutual transmission of radiation energy through the third coupling gap 303. The second connection end 3101 and the third grounding end 3111 are grounded.

[0074] The third radiation section 310 has a third feeding point 3103. The third feeding point 3103 may be located at the second connection end 3101; or, the third feeding point 3103 may be located at the fifth coupling end 3102; or, the third feeding point 3103 may be located between the second connection end 3101 and the fifth coupling end 3102. In a possible implementation, the third feeding point 3103 is provided at the second connection end 3101. By making the third feeding point 3103 located at the second connection end 3101, it is beneficial to excite all the third radiation sections 310 to generate corresponding resonant currents, thereby facilitating shortening the length of the third radiation section 310. The third feeding point 3103 is electrically connected to the third feed source 302; the third antenna radiator 301 generates a fifth resonant mode supporting the second low frequency band under the excitation of the third feed source 302. It can be understood that the third antenna unit 30 can support the second low frequency band. The second low frequency band can be any frequency band in the low frequency band that is different from the first low frequency band. For example, the second low frequency band may be one of the B5 band, the B8 band, the B20 band, and the B28 band.

[0075] The electronic device 100 of the present embodiment further includes a third antenna unit 30, which includes a third antenna radiator 301 and a third feed source 302, which are arranged at one end of the third sub-frame 403 close to the first sub-frame 401. The third antenna radiator 301 includes a third radiating section 310 and a third parasitic section 311. One end of the third radiating section 310 forms a second connecting end 3101, and the other end of the third radiating section 310 forms a fifth coupling end 3102. One end of the third parasitic section 311 forms a sixth coupling end 3110, and the other end of the third parasitic section 311 forms a third grounding end 3111. The fifth coupling end 3102 and the sixth coupling end 3110 are connected to each other. 110, a third coupling gap 303 is formed between the second connection end 3101 and the third grounding end 3111, the third radiation section 310 has a third feeding point 3103, and the third feeding point 3103 is electrically connected to the third feed source 302; the third antenna radiator 301 generates at least a fifth resonance mode supporting the second low-frequency band under the excitation of the third feed source 302, that is, the third antenna unit 30 of the present application generates a fifth resonance mode supporting the second low-frequency band through the ring antenna formed by the third radiation section 310 and the third parasitic section 311, which can reduce the length of the third antenna unit 30 while achieving support for the low-frequency band, thereby reducing the occupied space.

[0076] like Fig.19 As shown, the third antenna unit 30 further includes a third tuning circuit 304. The third tuning circuit 304 is electrically connected between the third feeding point 3103 and the third feed source 302. Under the action of the third feed source 302 and the third tuning circuit 304, the third antenna radiator 301 generates a fifth resonance mode, a sixth resonance mode supporting the first ultra-high frequency band, and a seventh resonance mode supporting the second ultra-high frequency band.

[0077] The third tuning circuit 304 and the third feeding point 3103 may be directly or indirectly electrically connected. The third tuning circuit 304 and the third feed source 302 may be directly or indirectly electrically connected. The third tuning circuit 304 may include capacitors and / or inductors, etc. The present application does not specifically limit the number of capacitors and the number of inductors included in the third tuning circuit 304. When the third tuning circuit 304 includes multiple capacitors, the multiple capacitors may be connected in series or in parallel. When the third tuning circuit 304 includes multiple inductors, the multiple inductors may be connected in series or in parallel. When the third tuning circuit 304 includes one or more capacitors and one or more inductors, the inductors and capacitors may be connected in series or in parallel. The structural diagram of the third tuning circuit 304 can be found in the attached figure above. Figure 6 As shown in a~h.

[0078] The first UHF frequency band may be any frequency band in the UHF frequency band (greater than 3 GHz). The second UHF frequency band may be any frequency band in the UHF frequency band that is different from the first UHF frequency band. For example, the first UHF frequency band may be one of the N77 frequency band (3.3 GHz to 4.2 GHz), the N78 frequency band (3.3 GHz to 3.8 GHz), and the N79 frequency band (4.4 GHz to 5.0 GHz). The second UHF frequency band may be another one of the N77 frequency band, the N78 frequency band, and the N79 frequency band.

[0079] Similarly, the setting of the third tuning circuit 304 can change the equivalent electrical length of the third antenna radiator 301. Therefore, by making the third antenna unit 30 also include the third tuning circuit 304, the third tuning circuit 304 is electrically connected between the third feeding point 3103 and the third feed source 302, and the third antenna radiator 301 generates a fifth resonance mode under the action of the third feed source 302 and the third tuning circuit 304, the length of the third antenna radiator 301 can be adjusted accordingly, so as to take into account the length design and radiation performance of the third antenna radiator 301. In addition, by making the third antenna unit 30 also include a third tuning circuit 304, the third tuning circuit 304 is electrically connected between the third feeding point 3103 and the third feed source 302, the third antenna radiator 301 also generates a sixth resonance mode supporting the first ultra-high frequency band and a seventh resonance mode supporting the second ultra-high frequency band under the action of the third feed source 302 and the third tuning circuit 304, thereby expanding the number of frequency bands covered by the third antenna unit 30, and realizing the support of the third antenna unit 30 for low-frequency bands and multiple ultra-high frequency bands.

[0080] In this embodiment, Fig. 20 As shown, the third feeding point 3103 may be located at the second ground terminal 2111 , that is, the third radiation section 310 may be electrically connected to the third feed source 302 and the reference ground 50 through the third tuning circuit 304 .

[0081] Among them, Fig.21 As shown, the fifth resonance mode includes a 1 / 4 wavelength mode generated by the third radiation segment 310 between the third feeding point 3103 and the fifth coupling end 3102. In this embodiment, the 1 / 4 wavelength in the 1 / 4 wavelength mode is the 1 / 4 wavelength corresponding to the frequency band supported by the fifth resonance mode. Fig.21 The middle dashed line shows the resonant current corresponding to the fifth resonant mode. Fig.21It can be seen from the dotted line that the resonant current corresponding to the fifth resonant mode includes the resonant current I9 between the third feeding point 3103 of the third radiation segment 310 and the fifth coupling end 3102. The center frequency of the second low-frequency band is higher than the center frequency of the first low-frequency band. For example: the first low-frequency band can be the B28 band, and the second low-frequency band can be the B5 band. In the embodiment where the third feeding point 3103 is arranged at the second connection end 3101, the fifth resonant mode can generate a 1 / 4 wavelength mode in the overall third radiation segment 310.

[0082] like Fig. 22 As shown, the sixth resonant mode includes a 1 / 4 wavelength mode generated in the third radiation segment 310 between the third feeding point 3103 and the fifth coupling end 3102, and generates a resonant current in the same direction in the third parasitic segment 311. The 1 / 4 wavelength in the 1 / 4 wavelength mode in this embodiment is the 1 / 4 wavelength corresponding to the frequency band supported by the sixth resonant mode. The sixth resonant mode generates a resonant current in the same direction in the third parasitic segment 311, which means that the sixth resonant mode generates a resonant current in the third parasitic segment 311, and the direction of the resonant current generated by the sixth resonant mode in the third parasitic segment 311 is the same as the direction of the resonant current generated by the sixth resonant mode in the third radiation segment 310 between the third feeding point 3103 and the fifth coupling end 3102. Fig. 22 The middle dashed line shows the resonant current corresponding to the sixth resonant mode. Fig. 22 The middle dotted line shows that the resonant current corresponding to the sixth resonant mode includes the resonant current I10 between the third feeding point 3103 and the fifth coupling end 3102 of the third radiation segment 310, and the parasitic current I11 between the sixth coupling end 3110 and the third ground end 3111 of the third parasitic segment 311. The flow direction of the parasitic current I11 is the same as that of the resonant current I10. The intensity of the parasitic current I11 is weaker than that of the resonant current I10.

[0083] like Fig.23 As shown, the seventh resonance mode includes a 1 / 4 wavelength mode generated in the third parasitic segment 311, and generates a reverse resonance current in the third radiation segment 310. The 1 / 4 wavelength in the 1 / 4 wavelength mode in this embodiment is the 1 / 4 wavelength corresponding to the frequency band supported by the seventh resonance mode. The seventh resonance mode generates a reverse resonance current in the third radiation segment 310 means that the seventh resonance mode generates a resonance current in the third radiation segment 310, and the direction of the resonance current generated by the seventh resonance mode in the third radiation segment 310 is opposite to the direction of the resonance current generated by the seventh resonance mode in the third parasitic segment 311. Fig.23 The middle dashed line shows the resonant current corresponding to the seventh resonant mode. Fig.23The middle dotted line shows that the resonant current corresponding to the seventh resonant mode includes the resonant current I12 between the sixth coupling end 3110 and the third grounding end 3111 of the third parasitic segment 311, and the parasitic current I13 between the second connection end 3101 and the fifth coupling end 3102 of the third radiation segment 310. The flow direction of the parasitic current I13 is opposite to that of the resonant current I12. The intensity of the parasitic current I13 is weaker than that of the resonant current I12.

[0084] The center frequency of the second UHF frequency band is higher than the center frequency of the first UHF frequency band. For example, the first UHF frequency band may be the N78 frequency band, and the second UHF frequency band may be the N77 frequency band. Fig.24 As shown, Fig.24 for Fig. 20 The return loss, radiation efficiency and system efficiency curves of the third antenna unit 30 in the electronic device 100 are shown. Fig.24 The middle curve 7 is a return loss curve of the third antenna unit 30 . Fig.24 The middle curve 8 is a radiation efficiency curve of the third antenna unit 30 . Fig.24 Curve 9 in the middle is the total efficiency curve of the third antenna unit 30. Fig.24 It can be seen from the middle curve 7 that the third antenna unit 30 can support the second low frequency band of 0.82 GHz to 0.89 GHz, and can support the first ultra-high frequency band of 3.3 GHz to 3.8 GHz, and support the second ultra-high frequency band of 3.3 GHz to 4.2 GHz. The center frequency of the second low frequency band is 0.8546 GHz. The center frequency of the first ultra-high frequency band is 3.187 GHz. The center frequency of the second ultra-high frequency band is 3.8436 GHz. The fifth resonant mode, the sixth resonant mode, and the seventh resonant mode generated by the third antenna unit 30 can support the second low frequency band, the first ultra-high frequency band, and the second ultra-high frequency band, respectively.

[0085] Optionally, the second low frequency band is a 4G band. The first ultra-high frequency band and the second ultra-high frequency band are 5G bands. By making the third radiation section 310 of the third antenna unit 30 of the electronic device 100 and the loop antenna formed by the third parasitic section 311 generate a fifth resonance mode supporting the second low frequency band, the electronic device 100 can support two different low frequency bands through the second antenna unit 20 and the third antenna unit 30. And the loop antenna formed by the third radiation section 310 of the third antenna unit 30 of the electronic device 100 and the third parasitic section 311 also generates a sixth resonance mode supporting the first ultra-high frequency band and a seventh resonance mode supporting the second ultra-high frequency band, so that the electronic device 100 can support multiple different 5G bands through the second antenna unit 20 and the third antenna unit 30, which is beneficial to improve the 5G communication performance of the electronic device 100.

[0086] In a possible embodiment, the length of the third radiation section 310 is less than or equal to 25 mm. The length of the third parasitic section 311 is less than the length of the third radiation section 310. In a possible implementation manner, the length of the third radiation section 310 may be 18 mm to 22 mm. The length of the third parasitic section 311 may be 16 mm to 20 mm. Fig.24 The length of the third radiation section 310 corresponding to the return loss curve of the third antenna unit 30 shown is 22 mm. By making the length of the third radiation section 310 less than or equal to 25 mm, and the length of the third parasitic section 311 less than the length of the third radiation section 310, the length of the third antenna radiator 301 can be reduced while the third antenna unit 30 supports the first low frequency band, the first ultra-high frequency band, and the second ultra-high frequency band, which is conducive to the miniaturization of the third antenna unit 30. Among them, the center frequency point of the first ultra-high frequency band (i.e. Fig.24 The center frequency of the second ultra-high frequency band (i.e. Fig.24 3 points) is slightly smaller than the resonant frequency of the 1 / 4 wavelength mode generated by the third parasitic segment 311.

[0087] like Fig.25As shown, the reference floor 50 of the electronic device 100 includes a first grounding edge 501, a second grounding edge 502, and a third grounding edge 503 that are bent and connected in sequence. The first grounding edge 501 is located on the inner side of the second sub-frame 402. The second grounding edge 502 is located on the inner side of the first sub-frame 401. The third grounding edge 503 is located on the inner side of the third sub-frame 403. In the embodiment of the present application, the first grounding edge 501 is located on the inner side of the second sub-frame 402, which can be understood as the first grounding edge 501 is relatively close to the second sub-frame 402. The second grounding edge 502 is located on the inner side of the first sub-frame 401, which can be understood as the second grounding edge 502 is relatively close to the first sub-frame 401. The third grounding edge 503 is located on the inner side of the third sub-frame 403, which can be understood as the third grounding edge 503 is relatively close to the third sub-frame 403. The length of the first grounding edge 501 is longer than the length of the second grounding edge 502, and the length of the third grounding edge 503 is longer than the length of the second grounding edge 502. The connection between the first ground edge 501 and the second ground edge 502 forms a first floor corner point 504. The connection between the second ground edge 502 and the third ground edge 503 forms a second floor corner point 505. The first connection end 2101 is located on the side of the third coupling end 2102 facing the first floor corner point 504. It can be understood that the first connection end 2101 of the second antenna radiator 201 is closest to the first floor corner point 504 among the first connection end 2101, the third coupling end 2102, the fourth coupling end 2110 and the second ground end 2111. The second connection end 3101 is located on the side of the fifth coupling end 3102 facing the second floor corner point 505. It can be understood that the second connection end 3101 of the third antenna radiator 301 is closest to the second floor corner point 505 among the second connection end 3101, the fifth coupling end 3102, the sixth coupling end 3110 and the third ground end 3111.

[0088] By locating the first connection end 2101 on the side of the third coupling end 2102 facing the first floor corner point 504, that is, the return end of the first radiation section 110 of the second antenna unit 20 is close to the first floor corner point 504, more floor current along the first grounding edge 501 can be stimulated on the reference floor 50. Since the length of the first grounding edge 501 is longer, the radiation efficiency of the second antenna unit 20 is higher. In actual design, the size of the second antenna radiator 201 can be adjusted according to the radiation efficiency requirements, so as to further facilitate the miniaturization of the second antenna unit 20. Similarly, by locating the second connection end 3101 on the side of the fifth coupling end 3102 facing the second floor corner point 505, that is, the return end of the third radiation segment 310 of the third antenna unit 30 is close to the second floor corner point 505, more floor current along the third grounding edge 503 can be excited on the reference floor 50, and the length of the third grounding edge 503 is longer, so the radiation efficiency of the third antenna unit 30 is higher. In actual design, the size of the third antenna radiator 301 can be adjusted according to the radiation efficiency requirements, so as to further facilitate the miniaturization of the third antenna unit 30.

[0089] The features mentioned in the specification, claims and drawings can be arbitrarily combined with each other as long as they are meaningful within the scope of this application. 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 this field can change, modify, replace and modify the above embodiments within the scope of this application, and these improvements and modifications are also regarded as the protection scope of this application.

Claims

1. An electronic device, characterized in that: include: A frame, comprising a first sub-frame and a second sub-frame connected by bending; A first antenna unit, comprising a first antenna radiator and a first feed source arranged on the first sub-frame, the first antenna radiator comprising a first radiating section and a first parasitic section, one end of the first radiating section forming a free end, the other end of the first radiating section forming a first coupling end, one end of the first parasitic section forming a second coupling end, the other end of the first parasitic section forming a first grounding end, a first coupling gap being formed between the second coupling end and the first coupling end, the first grounding end being grounded, the first radiating section being provided with a first feeding point and a grounding point located on a side of the first feeding point facing the free end, the first feeding point being electrically connected to the first feed source, and the grounding point being grounded; the first antenna radiator at least generates a first resonance mode supporting a first medium and high frequency band under the excitation of the first feed source; and A second antenna unit, comprising a second antenna radiator and a second feed source, which is arranged at one end of the second sub-frame close to the first sub-frame, the second antenna radiator comprises a second radiating section and a second parasitic section, one end of the second radiating section forms a first connecting end, the other end of the second radiating section forms a third coupling end, one end of the second parasitic section forms a fourth coupling end, the other end of the second parasitic section forms a second grounding end, a second coupling gap is formed between the fourth coupling end and the third coupling end, the first connecting end and the second grounding end are grounded, the second radiating section is provided with a second feeding point, and the second feeding point is electrically connected to the second feed source; The second antenna radiator generates at least a second resonance mode supporting a first low-frequency band under the excitation of the second feed source.

2. The electronic device according to claim 1, characterized in that: The second feeding point is arranged at the first connecting end.

3. The electronic device according to claim 1, characterized in that: The first antenna unit also includes a first tuning circuit, which is electrically connected between the first feeding point and the first feed source. The first antenna radiator generates the first resonant mode and a third resonant mode supporting a second medium and high frequency band under the action of the first feed source and the first tuning circuit.

4. The electronic device according to claim 3, characterized in that: One of the first resonance mode and the third resonance mode includes a 1 / 2 wavelength mode generated in the first radiation segment, and generates a resonance current in the same direction in the first parasitic segment; the other of the first resonance mode and the third resonance mode includes a 1 / 4 wavelength mode generated in the first parasitic segment, and generates a resonance current in the first radiation segment between the ground point and the first coupling end; the second resonance mode includes a 1 / 4 wavelength mode generated in the second radiation segment between the second feeding point and the third coupling end, and generates a resonance current in the same direction in the second parasitic segment.

5. The electronic device according to claim 3, characterized in that: The second antenna unit also includes a second tuning circuit, which is electrically connected between the second feeding point and the second feed source. The second antenna radiator generates the second resonant mode and a fourth resonant mode supporting the third medium and high frequency band under the action of the second feed source and the second tuning circuit.

6. The electronic device according to claim 5, characterized in that: The fourth resonance mode includes a 1 / 4 wavelength mode generated in the second parasitic segment and generates a reverse resonance current in the second radiation segment; the third mid-high frequency band is located between the first mid-high frequency band and the second mid-high frequency band.

7. The electronic device according to claim 5, characterized in that: The first medium and high frequency band, the first low frequency band and the second medium and high frequency band are 4G frequency bands; the third medium and high frequency band is a 5G frequency band.

8. The electronic device according to any one of claims 1 to 7, characterized in that: The length of the second radiation segment is less than or equal to 25 mm, and the length of the second parasitic segment is less than the length of the second radiation segment.

9. The electronic device according to any one of claims 1 to 7, characterized in that: The frame also includes a third sub-frame connected to a side of the first sub-frame away from the second sub-frame, and the electronic device also includes a third antenna unit, the third antenna unit includes a third antenna radiator and a third feed source arranged at one end of the third sub-frame close to the first sub-frame, the third antenna radiator includes a third radiating section and a third parasitic section, one end of the third radiating section forms a second connecting end, the other end of the third radiating section forms a fifth coupling end, one end of the third parasitic section forms a sixth coupling end, the other end of the third parasitic section forms a third grounding end, a third coupling gap is formed between the sixth coupling end and the fifth coupling end, the second connecting end and the third grounding end are grounded, the third radiating section has a third feeding point, and the third feeding point is electrically connected to the third feed source; the third antenna radiator generates at least a fifth resonance mode supporting the second low-frequency band under the excitation of the third feed source.

10. The electronic device according to claim 9, characterized in that: The third feeding point is arranged at the second connection end.

11. The electronic device according to claim 9, characterized in that: The fifth resonant mode includes a 1 / 4 wavelength mode generated by the third radiation segment between the third feeding point and the fifth coupling end; and the center frequency of the second low-frequency band is higher than the center frequency of the first low-frequency band.

12. The electronic device according to claim 9, characterized in that: The third antenna unit also includes a third tuning circuit, which is electrically connected between the third feeding point and the third feed source. The third antenna radiator generates the fifth resonance mode under the action of the third feed source and the third tuning circuit, as well as a sixth resonance mode supporting the first ultra-high frequency band and a seventh resonance mode supporting the second ultra-high frequency band.

13. The electronic device according to claim 12, characterized in that: The sixth resonant mode includes a 1 / 4 wavelength mode generated in the third radiation segment between the third feeding point and the fifth coupling end, and generates a unidirectional resonant current in the third parasitic segment; the seventh resonant mode includes a 1 / 4 wavelength mode generated in the third parasitic segment, and generates a reverse resonant current in the third radiation segment; the center frequency of the second ultra-high frequency band is higher than the center frequency of the first ultra-high frequency band.

14. The electronic device according to claim 13, characterized in that: The second low frequency band is a 4G frequency band; the first ultra-high frequency band and the second ultra-high frequency band are 5G frequency bands.

15. The electronic device according to claim 9, characterized in that: The length of the third radiation segment is less than or equal to 25 mm, and the length of the third parasitic segment is less than the length of the third radiation segment.

16. The electronic device according to claim 9, characterized in that: The electronic device also includes a reference floor, which is arranged in a receiving space surrounded by the frame. The reference floor includes a first grounding edge, a second grounding edge and a third grounding edge that are bent and connected in sequence. The first grounding edge is located on the inner side of the second sub-frame, the second grounding edge is located on the inner side of the first sub-frame, and the third grounding edge is located on the inner side of the third sub-frame. The length of the first grounding edge is longer than the length of the second grounding edge, and the length of the third grounding edge is longer than the length of the second grounding edge. The connection between the first grounding edge and the second grounding edge forms a first floor corner point, and the connection between the second grounding edge and the third grounding edge forms a second floor corner point. The first connection end is located on the side of the third coupling end facing the first floor corner point, and the second connection end is located on the side of the fifth coupling end facing the second floor corner point.

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