Electronic device

Abstract

The application provides an electronic device, comprising 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, the other end of the first parasitic section is grounded, the first radiation section is provided with a first feed point electrically connected with the first feed source and a grounding point located on one side of the first feed point towards the free end and grounded; the first antenna radiator supports a first middle-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, 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 of the application can balance the cost and miniaturization.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to an electronic device. Background Technology

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

[0003] This application provides an electronic device that balances cost and miniaturization.

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

[0005] The border includes the first and second sub-borders that are bent and connected.

[0006] A first antenna element includes a first antenna radiator and a first feed source disposed on the first sub-frame. The first antenna radiator includes a first radiating segment and a first parasitic segment. One end of the first radiating segment forms a free end, and the other end of the first radiating segment forms a first coupling end. One end of the first parasitic segment forms a second coupling end, and the other end of the first parasitic segment forms a first ground end. A first coupling gap is formed between the second coupling end and the first coupling end. The first ground end is grounded. The first radiating segment has a first feed point and a ground point located on the side of the first feed point facing the free end. The first feed point is electrically connected to the first feed source, and the ground point is grounded. The first antenna radiator, under the excitation of the first feed source, generates at least a first resonant mode supporting a first mid-to-high frequency band.

[0007] The second antenna element includes a second antenna radiator and a second feed source disposed at one end of the second sub-frame near the first sub-frame. The second antenna radiator includes a second radiating segment and a second parasitic segment. One end of the second radiating segment forms a first connection terminal, and the other end of the second radiating segment forms a third coupling terminal. One end of the second parasitic segment forms a fourth coupling terminal, and the other end of the second parasitic segment forms a second ground terminal. A second coupling gap is formed between the fourth coupling terminal and the third coupling terminal. The first connection terminal and the second ground terminal are grounded. The second radiating segment has a second feed point, which is electrically connected to the second feed source. Under the excitation of the second feed source, the second antenna radiator generates at least a second resonant mode supporting a first low-frequency band.

[0008] The electronic device provided in this 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 disposed on the first sub-frame. Since the first antenna radiator includes a first radiating segment and a first parasitic segment, one end of the first radiating segment forms a free end, and the other end of the first radiating segment forms a first coupling end. One end of the first parasitic segment forms a second coupling end, and the other end of the first parasitic segment forms a first ground end. A first coupling gap is formed between the second coupling end and the first coupling end. The first ground end is grounded. The first radiating segment has a first feed point and a ground point. The first feed point is electrically connected to the first feed source, and the ground point is grounded. Under the excitation of the first feed source, the first antenna radiator generates at least a first resonant mode supporting a first mid-to-high frequency band. That is, the first antenna unit of this application generates a first resonant mode supporting a first mid-to-high frequency band through a T-shaped antenna formed by the first radiating segment and a loop antenna formed by the first parasitic segment and the first radiating segment between the ground point and the first coupling end. This can reduce the switching circuit in the first antenna unit while achieving wideband performance, thereby reducing the cost of the electronic device. The second antenna unit includes a second antenna radiator and a second feed source located at one end of the second sub-frame near the first sub-frame. The second antenna radiator includes a second radiating segment and a second parasitic segment. One end of the second radiating segment forms a first connecting end, and the other end forms a third coupling end. One end of the second parasitic segment forms a fourth coupling end, and the other end 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 segment has a second feed point, which is electrically connected to the second feed source. Under the excitation of the second feed source, the second antenna radiator generates at least a second resonant mode supporting the first low-frequency band. That is, the second antenna unit of this application generates a second resonant mode supporting the first low-frequency band through the loop antenna formed by the second radiating segment and the second parasitic segment. This can reduce the length of the second antenna unit while achieving support for the low-frequency band, thereby reducing the space occupied. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0010] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

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

[0012] Figure 3 for Figure 2The diagram shows a structure in an electronic device where one end of the first radiating segment of the first antenna radiator is a free end, the other end of the first radiating segment is a first coupling end, one end of the first parasitic segment is a second coupling end, and the other end of the first parasitic segment is a first grounding end.

[0013] Figure 4 for Figure 2 The diagram shows a second antenna radiator in the electronic device, where one end of the second radiating segment forms a first connection terminal, and the other end of the second radiating segment forms a third coupling terminal. A fourth coupling terminal is formed at one end of the second parasitic segment, and a second grounding terminal is formed at the other end of the second parasitic segment.

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

[0015] Figure 6 for Figure 5 The diagram shows the structure of the first tuning circuit.

[0016] Figure 7 for Figure 5 The diagram shows a structure in which the first radiating segment of the electronic device is electrically connected to the first feed source and the reference ground via a first tuning circuit.

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

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

[0019] Figure 10 for Figure 5 The diagram shows the return loss, radiation efficiency, and system efficiency curves of the first antenna element in the electronic device shown.

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

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

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

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

[0024] Figure 15 for Figure 12 The return loss, radiation efficiency, and system efficiency curves of the second antenna unit in the electronic device shown are illustrated.

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

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

[0027] Figure 18 for Figure 17 The diagram shows a structure in an electronic device where one end of the third radiating segment of the third antenna radiator forms a second connection terminal, the other end of the third radiating segment forms a fifth coupling terminal, one end of the third parasitic segment forms a sixth coupling terminal, and the other end of the third parasitic segment forms a third ground terminal.

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

[0029] Figure 20 for Figure 19 The diagram shows a structure in which the third radiating section of the electronic device can be electrically connected to the third feed source and the reference ground via a third tuning circuit.

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

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

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

[0033] Figure 24 for Figure 20 The curves showing the return loss, radiation efficiency, and system efficiency of the third antenna element in the electronic device are shown.

[0034] Figure 25 for Figure 20The diagram shows the structure of the electronic device with its first connection point near the first floor corner and its second connection point near the second floor corner.

[0035] Explanation of reference numerals in the attached figures:

[0036] Electronic device 100; First antenna element 10; Second antenna element 20; Frame 40; Reference ground plane 50; First sub-frame 401; Second sub-frame 402; Third sub-frame 403; Fourth sub-frame 404; First antenna radiator 101; First feed 102; First radiating 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 feed point 1103; Grounding point 1104; Second antenna radiator 201; Second feed 202; Second radiating section 210; Second parasitic section 211; First connection end 2101; Third coupling end 2102; Fourth coupling terminal 2110; Second ground terminal 2111; Second coupling gap 203; Second feed point 2103; First tuning circuit 104; Second tuning circuit 204; Third antenna element 30; Third antenna radiator 301; Third feed 302; Third radiating section 310; Third parasitic section 311; Second connection terminal 3101; Fifth coupling terminal 3102; Sixth coupling terminal 3110; Third ground terminal 3111; Third coupling gap 303; Third feed point 3103; Third tuning circuit 304; First grounding edge 501; Second grounding edge 502; Third grounding edge 503; First ground corner point 504; Second ground corner point 505. Detailed Implementation

[0037] The technical solutions provided in this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort are within the protection scope of this application.

[0038] In this application, the terms "embodiment" or "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment or implementation can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0039] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order; the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. Furthermore, the terms "end" and "point" in the specification, claims, and accompanying drawings of this application can refer to a small segment of the antenna radiator relative to the entire antenna radiator; that is, "end" should not be narrowly interpreted as the end point, and "point" should not be narrowly interpreted as a single point.

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

[0041] The frame 40 can be a metal frame or a non-metal frame, such as a plastic frame. The frame 40 includes a first sub-frame 401 and a second sub-frame 402 that are bent and connected. This 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 bent at a right angle; or, the first sub-frame 401 and the second sub-frame 402 can be bent with rounded corners, etc. The frame 40 encloses and forms a receiving space. In one possible embodiment, the width direction of the electronic device 100 can be referred to as the X-axis direction in the figures; the length direction of the electronic device 100 can be referred to as the Y-axis direction in the figures. 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 sequentially. The first sub-border 401 and the fourth sub-border 404 are arranged opposite each other along the length direction of the electronic device 100, with the first sub-border 401 being the bottom border of the electronic device 100 and the fourth sub-border 404 being the top border of the electronic device 100. The second sub-border 402 and the third sub-border 403 are arranged opposite each other along the width direction of the electronic device 100, with the second sub-border 402 being the left border of the electronic device 100 and the third sub-border 403 being the right border of the electronic device 100. It is understood that the second sub-border 402 and the third sub-border 403 are located on both sides of the first sub-border 401. The first sub-border 401, the second sub-border 402, the third sub-border 403, and the fourth sub-border 404 enclose a receiving space. In the embodiments of this application, the first sub-border 401 and the fourth sub-border 404 are relatively shorter, while the second sub-border 402 and the third sub-border 403 are relatively longer. Of course, in other possible implementations, the first sub-border 401 may also be the top border of the electronic device 100, and the fourth sub-border 404 may also be the bottom border of the electronic device 100; or, the second sub-border 402 may also be the right border of the electronic device 100, and the third sub-border 403 may also be the left border of the electronic device 100.

[0042] Reference ground 50 refers to the portion of electronic device 100 that is considered conductive ground and is not affected by any grounding configuration. The potential of reference ground 50 is conventionally zero. For example, reference ground 50 may include the ground plane of the main circuit board, the ground plane of the secondary circuit board, the metal components of the middle frame, and conductive components electrically connected to one or more of the ground planes of the main circuit board, the secondary circuit board, and the metal components of the middle frame. Reference ground 50 is located within the space enclosed by the frame 40.

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

[0044] Please refer to Figure 2 and Figure 3The first antenna radiator 101 includes a first radiating segment 110 and a first parasitic segment 111. This application does not specifically limit the material, width, material, or width of the first radiating segment 110 and the first parasitic segment 111. The material of the first radiating segment 110 and the material of the first parasitic segment 111 can be the same or different. The width of the first radiating segment 110 and the width of the first parasitic segment 111 can be the same or different. In the following embodiments, we take the example where the material of the first radiating segment 110 and the material of the first parasitic segment 111 are the same, and the width of the first radiating segment 110 and the width of the first parasitic segment 111 are the same. One end of the first radiating segment 110 forms a free end 1101, and the other end forms a first coupling end 1102. One end of the first parasitic segment 111 forms a second coupling end 1110, and the other end forms a first ground end 1112. A first coupling gap 103 is formed between the second coupling end 1110 and the first coupling end 1102. It is understood that the free end 1101, the first coupling end 1102, the second coupling end 1110, and the first grounding end 1112 are arranged sequentially. The size of the first coupling gap 103 can be 0.5mm to 2mm. The first radiating segment 110 and the first parasitic segment 111 can mutually transfer radiated energy through the first coupling gap 103. The first grounding end 1112 is grounded. Here, "free end" can be understood as an end that is not electrically connected to a conductive component or has an isolation gap with a conductive component. "Coupled end" can be understood as an end that can mutually transfer radiated energy with another coupling end. "Grounding end" can be understood as an end that is directly or indirectly electrically connected to the reference floor 50. In the following embodiments, the meanings of "free end," "coupled end," and "grounding end" are the same as described above and will not be repeated hereafter.

[0045] The first radiating section 110 is provided with a first feed point 1103 and a ground point 1104 located on the side of the first feed point 1103 facing the free end 1101. The first feed point 1103 may be located at the first coupling end 1102; or, the first feed point 1103 may be located between the first coupling end 1102 and the free end 1101. In one possible embodiment, the ground point 1104 may be spaced between the first feed point 1103 and the free end 1101. Specifically, the free end 1101, the ground point 1104, the first feed point 1103, and the first coupling end 1102 are arranged sequentially at intervals. The distance between the ground point 1104 and the free end 1101 may be greater than the distance between the ground point 1104 and the first feed point 1103. In another possible embodiment, the ground point 1104 may coincide with the first feed point 1103. The first feed point 1103 is electrically connected to the first feed source 102. Grounding point 1104 is grounded. The first feed point 1103 and the first feed source 102 can be directly electrically connected, or indirectly connected via electrical connectors such as metal springs. The grounding point 1104 and the reference ground plane 50 can be directly electrically connected, or indirectly connected via electrical connectors such as metal springs. The first antenna radiator 101, under the excitation of the first feed source 102, generates at least a first resonant mode supporting a first mid-to-high frequency band. It is understood that the first antenna element 10 can support the first mid-to-high frequency band. The first mid-to-high frequency band can be any band within the mid-to-high frequency band (1 GHz to 3 GHz). For example, the first mid-to-high frequency band may include one or more of the following: band B1 (1.92 GHz to 2.17 GHz), band B3 (1.71 GHz to 1.88 GHz), band B40 (2.3 GHz to 2.4 GHz), and band B41 (2.49 GHz to 2.69 GHz).

[0046] Please refer to Figure 1 and Figure 2The second antenna unit 20 includes a second antenna radiator 201 and a second feed 202 located at one end of the second sub-frame 402 near the first sub-frame 401. In this application, the second antenna radiator 201 being located on the second sub-frame 402 can be understood as the second antenna radiator 201 being integrated onto the second sub-frame 402; or, it can be understood as the second antenna radiator 201 being located on the inner side of the second sub-frame 402; or, it can be understood as the second antenna radiator 201 being relatively close to the second sub-frame 402. In other words, the second antenna radiator 201 can be a frame antenna radiator or an internal antenna radiator. The material of the second antenna radiator 201 can be metal, alloy, etc. The second feed 202 can be understood as a port on the circuit board used by the second antenna unit 20 for electrically connecting to the radio frequency chip. The second feed 202 is located within the receiving space enclosed by the frame 40. For example, the second feed 202 can be located on the circuit board and close to the second antenna radiator 201. The second feed 202 is electrically connected to the radio frequency chip and can receive the 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 segment 210 and a second parasitic segment 211. This application does not specifically limit the material, width, material, or width of the second radiating segment 210 and the second parasitic segment 211. The material of the second radiating segment 210 and the second parasitic segment 211 can be the same or different. The width of the second radiating segment 210 and the second parasitic segment 211 can be the same or different. In the following embodiments, we take the example where the material of the second radiating segment 210 and the second parasitic segment 211 are the same, and the width of the second radiating segment 210 and the second parasitic segment 211 are the same. One end of the second radiating segment 210 forms a first connecting end 2101, and the other end forms a third coupling end 2102. One end of the second parasitic segment 211 forms a fourth coupling end 2110, and the other end 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 is understood that the first connecting end 2101, the third coupling end 2102, the fourth coupling end 2110, and the second grounding end 2111 are arranged sequentially. The size of the second coupling gap 203 can be 0.5mm to 2mm. The second radiating segment 210 and the second parasitic segment 211 can mutually transfer radiated energy through the second coupling gap 203. The first connecting end 2101 and the second grounding end 2111 are grounded.

[0048] The second radiating segment 210 has a second feed point 2103. The second feed point 2103 can be located at the first connection terminal 2101; or, the second feed point 2103 can be located at the third coupling terminal 2102; or, the second feed point 2103 can be located between the first connection terminal 2101 and the third coupling terminal 2102. In one possible implementation, the second feed point 2103 is located at the first connection terminal 2101. By locating the second feed point 2103 at the first connection terminal 2101, it is beneficial to excite the entire second radiating segment 210 to generate a corresponding resonant current, thereby facilitating a shorter length of the second radiating segment 210. The second feed point 2103 is electrically connected to the second feed source 202; the second antenna radiator 201, under the excitation of the second feed source 202, generates at least a second resonant mode supporting the first low-frequency band. It is understood that the second antenna element 20 is capable of supporting the first low-frequency band. The first low-frequency band can be any band within the low-frequency band (less than 1 GHz). For example, the first low-frequency band can be one of the following: B5 band (0.82GHz to 0.89GHz), B8 band (0.88GHz to 0.96GHz), B20 band (0.79GHz to 0.86GHz), or B28 band (0.7GHz to 0.8GHz).

[0049] The electronic device 100 provided in this 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 102 disposed on the first sub-frame 401. Since the first antenna radiator 101 includes a first radiating segment 110 and a first parasitic segment 111, one end of the first radiating segment 110 forms a free end 1101, and the other end of the first radiating segment 110 forms a first coupling end 1102. One end of the first parasitic segment 111 forms a second coupling end 1110, and the other end of the first parasitic segment 111 forms a first grounding end 1112. A first coupling is formed between the second coupling end 1110 and the first coupling end 1102. The gap 103 is connected to the first grounding terminal 1112. The first radiating section 110 has a first feed point 1103 and a grounding point 1104. The first feed 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-high frequency band under the excitation of the first feed source 102. That is, the first antenna unit 10 of this application generates a first resonant mode supporting the first medium-high frequency band through the T-shaped antenna formed by the first radiating section 110 and the loop antenna formed by the first parasitic section 111 and the first radiating section 110 between the grounding point 1104 and the first coupling terminal 1102. This can reduce the switching circuit in the first antenna unit 10 while achieving wideband 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 202 located at one end of the second sub-frame 402 near the first sub-frame 401. The second antenna radiator 201 includes a second radiating segment 210 and a second parasitic segment 211. One end of the second radiating segment 210 forms a first connection terminal 2101, and the other end of the second radiating segment 210 forms a third coupling terminal 2102. One end of the second parasitic segment 211 forms a fourth coupling terminal 2110, and the other end of the second parasitic segment 211 forms a second ground terminal 2111. A second coupling is formed between the fourth coupling terminal 2110 and the third coupling terminal 2102. The gap 203 is connected to the ground at the first connection end 2101 and the second grounding end 2111. The second radiating section 210 has a second feed point 2103, which is electrically connected to the second feed source 202. Under the excitation of the second feed source 202, the second antenna radiator 201 generates at least a second resonant mode that supports the first low-frequency band. That is, the second antenna element 20 of this application generates a second resonant mode that supports the first low-frequency band through the loop antenna formed by the second radiating section 210 and the second parasitic section 211. This can reduce the length of the second antenna element 20 while achieving support for the low-frequency band, thereby reducing the space occupied.

[0050] In one possible embodiment, such as Figure 5As shown, the first antenna element 10 also includes a first tuning circuit 104. The first tuning circuit 104 is electrically connected between the first feed 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 resonant mode and a third resonant mode supporting the second mid-to-high frequency band.

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

[0052] Optional, such as Figure 6 As shown in Figure a, the first tuning circuit 104 may include a capacitor and an inductor connected in series. Figure 6 As shown in Figure b, the first tuning circuit 104 can also include a capacitor and an inductor connected in parallel. For example... Figure 6 As shown in Figure c, the first tuning circuit 104 may also include an inductor, a first capacitor, and a second capacitor, with the inductor connected in parallel with the first capacitor and then in series with the second capacitor. Figure 6 As shown in Figure d, the first tuning circuit 104 may also include a first inductor, a second inductor, and a capacitor, with the first inductor and capacitor connected in parallel and then in series with the second inductor. Figure 6 As shown in Figure e, the first tuning circuit 104 may also include an inductor, a first capacitor, and a second capacitor, with the inductor connected in series with the first capacitor and then in parallel with the second capacitor. Figure 6 As shown in Figure f, the first tuning circuit 104 may also include a first inductor, a second inductor, and a capacitor, with the first inductor and capacitor connected in series and then in parallel with the second inductor. For example... Figure 6 As shown in Figure g, the first tuning circuit 104 may also include a first sub-tuning circuit formed by a first inductor and a first capacitor connected in parallel, and a second sub-tuning circuit formed by a second inductor and a second capacitor connected in parallel, wherein the first sub-tuning circuit and the second sub-tuning circuit are connected in series. Figure 6 As shown in Figure 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, with the third sub-tuning circuit and the fourth sub-tuning circuit connected in parallel.

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

[0054] The first tuning circuit 104 can alter the effective electrical length of the first antenna radiator 101. For example, connecting a capacitive tuning circuit can reduce the effective electrical length of the first antenna radiator 101, while connecting an inductive tuning circuit can increase the effective electrical length of the first antenna radiator 101. Therefore, by including the first tuning circuit 104 in the first antenna unit 10, which is electrically connected between the first feed point 1103 and the first feed source 102, 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. This allows for the corresponding adjustment of the length of the first antenna radiator 101, thus balancing the length design and radiation performance of the first antenna radiator 101. Furthermore, by including a first tuning circuit 104 in the first antenna unit 10, which is electrically connected between the first feed point 1103 and the first feed source 102, the first antenna radiator 101 generates a third resonant mode supporting the second mid-to-high frequency band under the action of the first feed source 102 and the first tuning circuit 104. This can extend the mid-to-high frequency band covered by the first antenna unit 10, enabling the first antenna unit 10 to support multiple mid-to-high frequency bands and / or support broadband mid-to-high frequency bands.

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

[0056] The first and third resonant modes include either a half-wavelength mode generated in the first radiation segment 110 and a resonant current in the same direction generated in the first parasitic segment 111, or a quarter-wavelength mode generated in the first parasitic segment 111 and a resonant current in the opposite direction generated in the first radiation segment 110 between the ground point 1104 and the first coupling terminal 1102. The second resonant mode includes a quarter-wavelength mode generated in the second radiation segment 210 between the second feed point 2103 and the third coupling terminal 2102 and a resonant current in the same direction generated in the second parasitic segment 211. In the terms "half-wavelength mode" and "quarter-wavelength mode," "wavelength" refers to the wavelength corresponding to the frequency band supported by the respective resonant mode.

[0057] In one possible embodiment, such as Figure 8 As shown, the first resonant mode includes a half-wavelength mode generated in the first radiation segment 110, and generates a resonant current in the same direction in the first parasitic segment 111. In this embodiment, the half-wavelength in the half-wavelength mode is the half-wavelength corresponding to the frequency band supported by the first resonant mode. The first resonant mode generating a resonant current in the same direction in the first parasitic segment 111 means that the first resonant mode generates a resonant current in the first parasitic segment 111, and the direction of the resonant current generated by the first resonant mode in the first parasitic segment 111 is the same as the direction of the resonant current generated by the first resonant mode in the first radiation segment 110. Figure 8 The dashed line in the middle indicates the resonant current corresponding to the first resonant mode. From... Figure 8 The dashed line indicates 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 radiating 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 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 that of the resonant current I1. In this embodiment, the equivalent electrical length of the first radiating segment 110 is approximately half the wavelength of the first mid-to-high frequency band. For example, the length of the first radiating segment 110 can be 20mm to 70mm. The length of the first radiating segment 110 between the grounding point 1104 and the first feed point 1103 can be less than or equal to 1 / 4 of the length of the first radiating segment 110, that is, the length of the first radiating segment 110 between the grounding point 1104 and the first feed point 1103 can be less than or equal to 17mm. In other words, the length of the first radiation segment 110 between the grounding point 1104 and the first feed point 1103 can be less than or equal to 1 / 8 of the wavelength of the first medium-high frequency band.

[0058] like Figure 9 As shown, the third resonant mode includes a 1 / 4 wavelength mode generated in the first parasitic segment 111, and generates a reverse resonant current in the first radiation segment 110 between the ground point 1104 and the first coupling terminal 1102. 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 third resonant mode. The reverse resonant current generated in the first radiation segment 110 between the ground point 1104 and the first coupling terminal 1102 means that the third resonant mode generates a resonant current in the first radiation segment 110 between the ground point 1104 and the first coupling terminal 1102, and the direction of the resonant current generated in the first radiation segment 110 between the ground point 1104 and the first coupling terminal 1102 is opposite to the direction of the resonant current generated in the first parasitic segment 111. Figure 9The dashed line indicates the resonant current corresponding to the third resonant mode. From... Figure 9 The dashed line indicates that the resonant current corresponding to the third resonant mode includes the resonant current I3 between the second coupling terminal 1110 and the first ground terminal 1112 of the first parasitic segment 111, and the parasitic current I4 between the ground point 1104 and the first coupling terminal 1102 of the first radiating segment 110. The 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 mid-to-high frequency band. For example, the length of the first parasitic segment 111 can be 10mm to 40mm.

[0059] By including one of the first resonant mode and the third resonant mode in the half-wavelength mode generated in the first radiation segment 110 and generating a resonant current in the same direction in the first parasitic segment 111, and including the other of the first resonant mode and the third resonant mode in the quarter-wavelength mode generated in the first parasitic segment 111 and generating a resonant current in the opposite direction in the first radiation segment 110 between the grounding point 1104 and the first coupling terminal 1102, broadband performance in the first mid-to-high frequency band and the second mid-to-high frequency band can be achieved.

[0060] like Figure 10 As shown, Figure 10 for Figure 5 The diagram shows the return loss, radiation efficiency, and system efficiency curves of the first antenna element 10 in the electronic device 100. Figure 10 Curve 1 in the middle is the return loss curve of the first antenna element 10. Figure 10 Curve 2 in the middle is the radiation efficiency curve of the first antenna element 10. Figure 10 Curve 3 in the middle represents the overall efficiency curve of the first antenna element 10. From... Figure 10 As shown in curve 1, the first antenna element 10 can support a first mid-to-high frequency band of 1.5 GHz to 2.2 GHz and a second mid-to-high frequency band of 2.2 GHz to 3 GHz. The center frequency of the first mid-to-high frequency band is 1.8444 GHz. The center frequency of the second mid-to-high frequency band is 2.7019 GHz. The bandwidth of the first mid-to-high frequency band is close to 0.7 GHz. The bandwidth of the second mid-to-high frequency band is close to 0.8 GHz. Both the first and second mid-to-high frequency bands have relatively wide bandwidths. The first resonant mode and the third resonant mode generated by the first antenna element 10 enable the first antenna element 10 to basically cover the entire mid-to-high frequency band. Therefore, the first antenna element 10 provided in this application does not require the introduction of other switching circuits, which can reduce the cost of the electronic device 100.

[0061] In one possible embodiment, such as Figure 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 feed 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 resonant mode and a fourth resonant mode supporting the third mid-to-high frequency band.

[0062] The second tuning circuit 204 can be directly or indirectly connected to the second feed point 2103. The second tuning circuit 204 can also be directly or indirectly connected to the second feed source 202. The second tuning circuit 204 may include capacitors and / or inductors. This application does not specifically limit the number of capacitors or inductors included in the second tuning circuit 204. When the second tuning circuit 204 includes multiple capacitors, the capacitors can be connected in series or in parallel. When the second tuning circuit 204 includes multiple inductors, the inductors can 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 can be connected in series or in parallel. A schematic diagram of the structure of the second tuning circuit 204 can be found in the above appendix. Figure 6 As shown in Figures a through h.

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

[0064] Similarly, the second tuning circuit 204 can alter the equivalent electrical length of the second antenna radiator 201. Therefore, by including the second tuning circuit 204 in the second antenna unit 20, which is electrically connected between the second feed point 2103 and the second feed source 202, the second antenna radiator 201 generates a second resonant mode under the action of the second feed source 202 and the second tuning circuit 204. This allows for the corresponding adjustment of the length of the second antenna radiator 201, thus balancing its length design and radiation performance. Furthermore, by including the second tuning circuit 204 in the second antenna unit 20, which is electrically connected between the second feed point 2103 and the second feed source 202, the second antenna radiator 201 also generates a fourth resonant mode supporting the third mid-to-high frequency band under the action of the second feed source 202 and the second tuning circuit 204. This expands the number of frequency bands covered by the second antenna unit 20, enabling the second antenna unit 20 to support both low-frequency and mid-to-high-frequency bands.

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

[0066] Among them, such as Figure 13 As shown, the second resonant mode includes a 1 / 4 wavelength mode generated in the second radiation segment 210 between the second feed point 2103 and the third coupling terminal 2102, and generates a resonant current in the same direction in the second parasitic segment 211. 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 second resonant mode. The second resonant mode generating a resonant current in the same direction in the second parasitic segment 211 means that the second resonant mode generates a resonant current in the second parasitic segment 211, and the direction of the resonant current generated by the second resonant mode in the second parasitic segment 211 is the same as the direction of the resonant current generated by the second resonant mode in the second radiation segment 210 between the second feed point 2103 and the third coupling terminal 2102. Figure 13 The dashed line indicates the resonant current corresponding to the second resonant mode. From... Figure 13 The dashed line indicates that the resonant current corresponding to the second resonant mode includes the resonant current I5 between the second feed point 2103 and the third coupling terminal 2102 of the second radiation segment 210, and the parasitic current I6 between the fourth coupling terminal 2110 and the second ground terminal 2111 of the second parasitic segment 211. The direction of the parasitic current I6 is the same as that of the resonant current I5. The intensity of the parasitic current I6 is weaker than that of the resonant current I5. In the embodiment where the second feed point 2103 is located at the first connection terminal 2101, the second resonant mode can generate a 1 / 4 wavelength mode in the entire second radiation segment 210.

[0067] like Figure 14 As shown, the fourth resonant mode includes a 1 / 4 wavelength mode generated in the second parasitic segment 211 and a reverse resonant current generated in the second radiation segment 210. 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 fourth resonant mode. The fourth resonant mode generating a reverse resonant current in the second radiation segment 210 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. Figure 14 The dashed line indicates the resonant current corresponding to the fourth resonant mode. From... Figure 14The dashed line indicates that the resonant current corresponding to the fourth resonant mode includes the resonant current I7 between the fourth coupling terminal 2110 of the second parasitic segment 211 and the second ground terminal 2111, and the parasitic current I8 between the first connection terminal 2101 and the third coupling terminal 2102 of the second radiating segment 210. The 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-to-high frequency band is located between the first and second mid-to-high frequency bands. For example, the third mid-to-high frequency band can be any band from 2.2 GHz to 2.5 GHz.

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

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

[0070] By enabling the T-shaped antenna formed by the first radiating segment 110 of the first antenna unit 10, and the loop antenna formed by the first radiating segment 110 between the first parasitic segment 111 and the grounding point 1104 to the first coupling end 1102, to generate a first resonant mode supporting the first mid-to-high frequency band and a third resonant mode supporting the second mid-to-high frequency band, the first antenna unit 10 can basically cover the entire 4G mid-to-high frequency band. Furthermore, by enabling the loop antenna formed by the second radiating segment 210 and the second parasitic segment 211 of the second antenna unit 20 to generate a second resonant mode supporting the first low frequency band and a fourth resonant mode supporting the third mid-to-high frequency band, the second antenna unit 20 can achieve 4G and 5G dual-connectivity compatibility at mid-to-high frequencies while supporting low-frequency communication, which is beneficial for the use of the electronic device 100 in ENDC (E-UTRANR Dual-Connectivity) mode.

[0071] In one possible embodiment, the length of the second radiating segment 210 is less than or equal to 25 mm, and the length of the second parasitic segment 211 is less than the length of the second radiating segment 210. In another possible embodiment, the length of the second radiating segment 210 can be 18 mm to 22 mm, and the length of the second parasitic segment 211 can be 16 mm to 20 mm. (See attached document for details.) Figure 15 The length of the second radiating segment 210 corresponding to the return loss curve of the second antenna unit 20 shown is 22 mm. By making the length of the second radiating segment 210 less than or equal to 25 mm, and the length of the second parasitic segment 211 less than the length of the second radiating segment 210, the length of the second antenna radiator 201 can be reduced while achieving support for the first low-frequency band and the third mid-to-high-frequency band of the second antenna unit 20, which is beneficial for the miniaturization of the second antenna unit 20. Among them, the center frequency of the first low-frequency band (i.e., Figure 15 The resonant frequency of the 1 / 4 wavelength mode generated by the second radiation segment 210 between the second feed point 2103 and the third coupling end 2102 is slightly greater than the center frequency of the third mid-high frequency band (i.e., the center frequency of the third mid-high frequency band). Figure 15 The resonant frequency of the 1 / 4 wavelength mode generated by the second parasitic segment 211 is slightly smaller than that of the 2nd point.

[0072] Further, please refer to Figure 16 and Figure 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 302 disposed at one end of the third sub-frame 403 near the first sub-frame 401. In this application, the third antenna radiator 301 being disposed on the third sub-frame 403 can be understood as the third antenna radiator 301 being integrated onto the third sub-frame 403; or, it can be understood as the third antenna radiator 301 being disposed on the inner side of the third sub-frame 403; or, it can be understood as the third antenna radiator 301 being disposed relatively close to the third sub-frame 403. In other words, the third antenna radiator 301 can be an antenna radiator of the frame 40 or a built-in antenna radiator. The material of the third antenna radiator 301 can be metal, alloy, etc. The third feed 302 can be understood as a port on the circuit board used by the third antenna unit 30 for electrically connecting to the radio frequency chip. The third feed 302 is disposed within the receiving space formed by the frame 40. For example, the third feed 302 can be disposed on the circuit board and close to the third antenna radiator 301. The third feed 302 is electrically connected to the RF chip and can receive the third excitation current provided by the RF chip.

[0073] Please refer to Figure 17 and Figure 18The third antenna radiator 301 includes a third radiating segment 310 and a third parasitic segment 311. This application does not specifically limit the material, width, or other properties of the third radiating segment 310 and the third parasitic segment 311. The material of the third radiating segment 310 and the third parasitic segment 311 can be the same or different. The width of the third radiating segment 310 and the third parasitic segment 311 can also be the same or different. In the following embodiments, we take the example where the material of the third radiating segment 310 and the third parasitic segment 311 are the same, and the width of the third radiating segment 310 and the third parasitic segment 311 are the same. One end of the third radiating segment 310 forms a second connection terminal 3101, and the other end forms a fifth coupling terminal 3102. One end of the third parasitic segment 311 forms a sixth coupling terminal 3110, and the other end forms a third ground terminal 3111. A third coupling gap 303 is formed between the sixth coupling terminal 3110 and the fifth coupling terminal 3102. Understandably, the second connecting terminal 3101, the fifth coupling terminal 3102, the sixth coupling terminal 3110, and the third grounding terminal 3111 are arranged sequentially. The size of the third coupling gap 303 can be 0.5mm to 2mm. The third radiating segment 310 and the third parasitic segment 311 can mutually transfer radiated energy through the third coupling gap 303. The second connecting terminal 3101 and the third grounding terminal 3111 are grounded.

[0074] The third radiating segment 310 has a third feed point 3103. The third feed point 3103 can be located at the second connection terminal 3101; or, the third feed point 3103 can be located at the fifth coupling terminal 3102; or, the third feed point 3103 can be located between the second connection terminal 3101 and the fifth coupling terminal 3102. In one possible implementation, the third feed point 3103 is located at the second connection terminal 3101. By allowing the third feed point 3103 to be located at the second connection terminal 3101, it is beneficial to excite all the third radiating segments 310 to generate corresponding resonant currents, thereby facilitating a shorter length for the third radiating segment 310. The third feed 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 is understood that the third antenna element 30 is capable of supporting the second low-frequency band. The second low-frequency band can be any frequency band different from the first low-frequency band. For example, the second low-frequency band can be one of the following: B5 band, B8 band, B20 band, or B28 band.

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

[0076] like Figure 19 As shown, the third antenna element 30 also includes a third tuning circuit 304. The third tuning circuit 304 is electrically connected between the third feed 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 resonant mode, as well as a sixth resonant mode supporting the first ultra-high frequency band and a seventh resonant mode supporting the second ultra-high frequency band.

[0077] The third tuning circuit 304 can be directly or indirectly connected to the third feed point 3103. The third tuning circuit 304 can also be directly or indirectly connected to the third feed source 302. The third tuning circuit 304 may include capacitors and / or inductors. This application does not specifically limit the number of capacitors or inductors included in the third tuning circuit 304. When the third tuning circuit 304 includes multiple capacitors, the capacitors can be connected in series or in parallel. When the third tuning circuit 304 includes multiple inductors, the inductors can 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 can be connected in series or in parallel. A schematic diagram of the structure of the third tuning circuit 304 can be found in the above appendix. Figure 6 As shown in Figures a through h.

[0078] The first UHF band can be any band within the UHF bands (greater than 3 GHz). The second UHF band can be any UHF band different from the first UHF band. For example, the first UHF band can be one of the N77 band (3.3 GHz to 4.2 GHz), the N78 band (3.3 GHz to 3.8 GHz), or the N79 band (4.4 GHz to 5.0 GHz). The second UHF band can be another one of the N77, N78, or N79 bands.

[0079] Similarly, the configuration of the third tuning circuit 304 can change the equivalent electrical length of the third antenna radiator 301. Therefore, by including the third tuning circuit 304 in the third antenna element 30, which is electrically connected between the third feed point 3103 and the third feed source 302, the third antenna radiator 301 generates a fifth resonant 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, thereby balancing the length design and radiation performance of the third antenna radiator 301. Furthermore, by including a third tuning circuit 304 in the third antenna unit 30, which is electrically connected between the third feed point 3103 and the third feed source 302, the third antenna radiator 301, under the action of the third feed source 302 and the third tuning circuit 304, also generates a sixth resonant mode supporting the first ultra-high frequency band and a seventh resonant mode supporting the second ultra-high frequency band. This can expand the number of frequency bands covered by the third antenna unit 30, enabling the third antenna unit 30 to support low-frequency bands and multiple ultra-high frequency bands.

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

[0081] Among them, such as Figure 21 As shown, the fifth resonant mode includes a quarter-wavelength mode generated in the third radiation segment 310 between the third feed point 3103 and the fifth coupling terminal 3102. In this embodiment, the quarter-wavelength in the quarter-wavelength mode is the quarter-wavelength corresponding to the frequency band supported by the fifth resonant mode. Figure 21 The dashed line in the middle indicates the resonant current corresponding to the fifth resonant mode. From... Figure 21The dashed line indicates that the resonant current corresponding to the fifth resonant mode includes the resonant current I9 between the third feed point 3103 and the fifth coupling terminal 3102 of the third radiation segment 310. 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 feed point 3103 is located at the second connection terminal 3101, the fifth resonant mode can generate a 1 / 4 wavelength mode in the entire third radiation segment 310.

[0082] like Figure 22 As shown, the sixth resonant mode includes a 1 / 4 wavelength mode generated in the third radiation segment 310 between the third feed point 3103 and the fifth coupling terminal 3102, and generates a resonant current in the same direction in the third parasitic segment 311. 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 sixth resonant mode. The sixth resonant mode generating a resonant current in the third parasitic segment 311 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 feed point 3103 and the fifth coupling terminal 3102. Figure 22 The dashed line in the middle indicates the resonant current corresponding to the sixth resonant mode. From... Figure 22 The dashed line indicates that the resonant current corresponding to the sixth resonant mode includes the resonant current I10 between the third feed point 3103 and the fifth coupling terminal 3102 of the third radiation segment 310, and the parasitic current I11 between the sixth coupling terminal 3110 and the third ground terminal 3111 of the third parasitic segment 311. The 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 Figure 23 As shown, the seventh resonant mode includes a 1 / 4 wavelength mode generated in the third parasitic segment 311 and a reverse resonant current generated in the third radiation segment 310. 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 seventh resonant mode. The seventh resonant mode generating a reverse resonant current in the third radiation segment 310 means that the seventh resonant mode generates a resonant current in the third radiation segment 310, and the direction of the resonant current generated by the seventh resonant mode in the third radiation segment 310 is opposite to the direction of the resonant current generated by the seventh resonant mode in the third parasitic segment 311. Figure 23 The dashed line in the middle indicates the resonant current corresponding to the seventh resonant mode. From... Figure 23The dashed line indicates that the resonant current corresponding to the seventh resonant mode includes the resonant current I12 between the sixth coupling terminal 3110 and the third ground terminal 3111 of the third parasitic segment 311, and the parasitic current I13 between the second connection terminal 3101 and the fifth coupling terminal 3102 of the third radiating segment 310. The 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 band is higher than that of the first UHF band. For example, the first UHF band could be the N78 band, and the second UHF band could be the N77 band. Figure 24 As shown, Figure 24 for Figure 20 The return loss, radiation efficiency, and system efficiency curves of the third antenna element 30 in the electronic device 100 are shown. Figure 24 Curve 7 in the middle is the return loss curve of the third antenna element 30. Figure 24 Curve 8 in the middle is the radiation efficiency curve of the third antenna element 30. Figure 24 Curve 9 represents the overall efficiency curve of the third antenna element 30. From... Figure 24 As shown in curve 7, the third antenna element 30 can support the second low-frequency band of 0.82GHz to 0.89GHz, the first ultra-high-frequency band of 3.3GHz to 3.8GHz, and the second ultra-high-frequency band of 3.3GHz to 4.2GHz. The center frequency of the second low-frequency band is 0.8546GHz. The center frequency of the first ultra-high-frequency band is 3.187GHz. The center frequency of the second ultra-high-frequency band is 3.8436GHz. The fifth, sixth, and seventh resonant modes generated by the third antenna element 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 and second ultra-high frequency bands are 5G bands. By forming a loop antenna with the third radiating segment 310 and the third parasitic segment 311 of the third antenna unit 30 of the electronic device 100, a fifth resonant mode supporting the second low-frequency band can be generated, enabling the electronic device 100 to support two different low-frequency bands through the second antenna unit 20 and the third antenna unit 30. Furthermore, by forming a loop antenna with the third radiating segment 310 and the third parasitic segment 311 of the third antenna unit 30 of the electronic device 100, a sixth resonant mode supporting the first ultra-high frequency band and a seventh resonant mode supporting the second ultra-high frequency band can be generated, enabling the electronic device 100 to support multiple different 5G bands through the second antenna unit 20 and the third antenna unit 30, which is beneficial to improving the 5G communication performance of the electronic device 100.

[0086] In one possible embodiment, the length of the third radiating segment 310 is less than or equal to 25 mm. The length of the third parasitic segment 311 is less than the length of the third radiating segment 310. In one possible embodiment, the length of the third radiating segment 310 can be 18 mm to 22 mm. The length of the third parasitic segment 311 can be 16 mm to 20 mm. (See attached document for details.) Figure 24 The return loss curve of the third antenna element 30 shown indicates that the length of the third radiating segment 310 is 22 mm. By making the length of the third radiating segment 310 less than or equal to 25 mm, and the length of the third parasitic segment 311 less than the length of the third radiating segment 310, the length of the third antenna radiator 301 can be reduced while achieving support for the first low-frequency band, the first ultra-high-frequency band, and the second ultra-high-frequency band. This is beneficial for the miniaturization of the third antenna element 30. The center frequency of the first ultra-high-frequency band (i.e.,...) Figure 24 The resonant frequency of the 1 / 4 wavelength mode generated by the third radiation segment 310 between the third feed point 3103 and the fifth coupling end 3102 is slightly greater than the 2 points. The center frequency of the second ultra-high frequency band (i.e., Figure 24 The resonant frequency of the 1 / 4 wavelength mode generated by the third parasitic segment 311 is slightly smaller than the 3 points of the 3.

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

[0088] By positioning the first connection terminal 2101 on the side of the third coupling terminal 2102 facing the first floor corner point 504, that is, by placing the ground return terminal of the first radiating segment 110 of the second antenna unit 20 close to the first floor corner point 504, a larger floor current along the first grounding edge 501 can be excited on the reference floor 50. Since the first grounding edge 501 is relatively long, the radiation efficiency of the second antenna unit 20 is relatively high. In actual design, the size of the second antenna radiator 201 can be adjusted according to the radiation efficiency requirements to further facilitate the miniaturization of the second antenna unit 20. Similarly, by positioning the second connection terminal 3101 on the side of the fifth coupling terminal 3102 facing the second floor corner point 505, that is, by placing the ground return terminal of the third radiating segment 310 of the third antenna element 30 close to the second floor corner point 505, more floor current can be excited along the third grounding edge 503 on the reference floor 50. Since the length of the third grounding edge 503 is relatively long, the radiation efficiency of the third antenna element 30 is relatively high. In actual design, the size of the third antenna radiator 301 can be adjusted according to the radiation efficiency requirements to further facilitate the miniaturization of the third antenna element 30.

[0089] The features mentioned above in the specification, claims, and drawings can be arbitrarily combined with each other, provided they are meaningful within the scope of this application. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: The border includes the first and second sub-borders that are bent and connected. A reference floor is provided within the receiving space enclosed by the frame. The reference floor includes a first grounding edge and a second grounding edge that are bent and connected in sequence. The first grounding edge is located inside the second sub-frame, and the second grounding edge is located inside the first sub-frame. The connection between the first grounding edge and the second grounding edge forms a first floor corner point. The length of the first grounding edge is longer than the length of the second grounding edge. The first antenna element includes a first antenna radiator and a first feed source disposed on the first sub-frame. The first antenna radiator includes a first radiating segment and a first parasitic segment. One end of the first radiating segment forms a free end, and the other end of the first radiating segment forms a first coupling end. One end of the first parasitic segment forms a second coupling end, and the other end of the first parasitic segment forms a first ground end. A first coupling gap is formed between the second coupling end and the first coupling end. The first ground end is grounded. The first radiating segment has a first feed point and a ground point located on the side of the first feed point facing the free end. The first feed point is electrically connected to the first feed source, and the ground point is grounded. The first antenna radiator generates at least a first resonant mode supporting a first mid-to-high frequency band under the excitation of the first feed source. and The second antenna unit includes a second tuning circuit, a second antenna radiator and a second feed source located at one end of the second sub-frame near the first sub-frame. The second antenna radiator includes a second radiating segment and a second parasitic segment. One end of the second radiating segment forms a first connection terminal, which is located near the corner of the first floor. The other end of the second radiating segment forms a third coupling terminal. One end of the second parasitic segment forms a fourth coupling terminal and the other end of the second parasitic segment forms a second ground terminal. A second coupling gap is formed between the fourth coupling terminal and the third coupling terminal. The first connection terminal and the second ground terminal are grounded. The second radiating segment is provided with a second feed point, which is electrically connected to the second feed source. The second tuning circuit is electrically connected between the second feed point and the second feed source. Under the excitation of the second feed source and the action of the second tuning circuit, the second antenna radiator generates at least a second resonant mode supporting the first low-frequency band and a fourth resonant mode supporting the third mid-high frequency band.

2. The electronic device according to claim 1, characterized in that, The second power supply point is located at the first connection end.

3. The electronic device according to claim 1, characterized in that, The first antenna unit further includes a first tuning circuit, which is electrically connected between the first feed point and the first feed source. Under the action of the first feed source and the first tuning circuit, the first antenna radiator generates the first resonant mode and a third resonant mode that supports the second mid-to-high frequency band.

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

5. The electronic device according to claim 3, characterized in that, The fourth resonant mode includes a 1 / 4 wavelength mode generated in the second parasitic segment and a reverse resonant current generated in the second radiation segment; the third mid-to-high frequency band is located between the first mid-to-high frequency band and the second mid-to-high frequency band.

6. The electronic device according to claim 3, characterized in that, The first medium-high frequency band, the first low frequency band, and the second medium-high frequency band are 4G frequency bands; the third medium-high frequency band is a 5G frequency band.

7. The electronic device according to any one of claims 1 to 6, characterized in that, The length of the second radiating 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 radiating segment.

8. The electronic device according to any one of claims 1 to 6, characterized in that, The frame further includes a third sub-frame connected to the side of the first sub-frame away from the second sub-frame. The electronic device further includes a third antenna unit. The third antenna unit includes a third antenna radiator and a third feed source located at one end of the third sub-frame near the first sub-frame. The third antenna radiator includes a third radiating segment and a third parasitic segment. One end of the third radiating segment forms a second connection terminal, and the other end of the third radiating segment forms a fifth coupling terminal. One end of the third parasitic segment forms a sixth coupling terminal, and the other end of the third parasitic segment forms a third ground terminal. A third coupling gap is formed between the sixth coupling terminal and the fifth coupling terminal. The second connection terminal and the third ground terminal are grounded. The third radiating segment has a third feed point, which is electrically connected to the third feed source. The third antenna radiator, under the excitation of the third feed source, generates at least a fifth resonant mode supporting the second low-frequency band.

9. The electronic device according to claim 8, characterized in that, The third power supply point is located at the second connection terminal.

10. The electronic device according to claim 8, characterized in that, The fifth resonant mode includes a 1 / 4 wavelength mode generated by the third radiation segment between the third feed point and the fifth coupling end; the center frequency of the second low-frequency band is higher than the center frequency of the first low-frequency band.

11. The electronic device according to claim 8, characterized in that, The third antenna unit further includes a third tuning circuit, which is electrically connected between the third feed point and the third feed source. The third antenna radiator generates the fifth resonant mode, a sixth resonant mode supporting the first ultra-high frequency band, and a seventh resonant mode supporting the second ultra-high frequency band under the action of the third feed source and the third tuning circuit.

12. The electronic device according to claim 11, characterized in that, The sixth resonant mode includes a 1 / 4 wavelength mode generated in the third radiation segment between the third feed point and the fifth coupling terminal, and generates a resonant current in the same direction in the third parasitic segment; the seventh resonant mode includes a 1 / 4 wavelength mode generated in the third parasitic segment, and generates a resonant current in the opposite direction 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.

13. The electronic device according to claim 12, characterized in that, 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.

14. The electronic device according to claim 8, characterized in that, The length of the third radiating 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 radiating segment.

15. The electronic device according to claim 8, characterized in that, 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 third grounding edge is located inside 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 second grounding edge and the third grounding edge forms a second floor corner point. The first connecting end is located on the side of the third coupling end facing the first floor corner point, and the second connecting end is located on the side of the fifth coupling end facing the second floor corner point.

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