Electronic device

Abstract

The invention provides electronic equipment. The electronic equipment comprises a frame, a circuit board, a first antenna unit and a second antenna unit, the first antenna unit comprises a first antenna radiator arranged on the bottom frame and a first feed source arranged on the circuit board, and a first resonant mode supporting a first medium-high frequency band is generated from a first grounding end to a first free end of the first antenna radiator under excitation of the first feed source. A second resonance mode supporting a second medium-high frequency band is generated from the second grounding end to the second free end under excitation of the first feed source, and the center frequency point of the second medium-high frequency band is larger than that of the first medium-high frequency band. The second antenna unit comprises a second antenna radiator and a second feed source arranged on the circuit board. The second antenna radiator generates a third resonant mode supporting the target low-frequency band under excitation of the second feed source. According to the electronic equipment provided by the invention, the cost can be reduced while the radiation performance is ensured.

Description

Technical Field

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

[0002] In the related art, in order to ensure the radiation performance of electronic equipment, more switching circuits are introduced into the medium and high frequency antenna units, and the feed source of the low frequency antenna unit needs to be set on an independent circuit board, which increases the cost of the electronic equipment. Summary of the invention

[0003] The present application provides an electronic device that can reduce costs while ensuring radiation performance.

[0004] In one aspect, the present application provides an electronic device, comprising:

[0005] A frame, comprising a top frame, a left frame, a bottom frame and a right frame connected end to end in sequence, wherein a containing space is formed between the top frame, the left frame, the bottom frame and the right frame;

[0006] A circuit board is accommodated in the accommodation space;

[0007] A first antenna unit, comprising a first antenna radiator arranged on the bottom frame and a first feed source arranged on the circuit board, the first antenna radiator comprising a first radiating section and a first parasitic section located on a side of the first radiating section away from the left frame, the first radiating section comprising a first grounding end, a first feeding point and a first free end, the first grounding end is grounded, the first feeding point is electrically connected to the first feed source, the first parasitic section comprises a second grounding end and a second free end, the second grounding end is grounded, a first coupling gap is formed between the second free end and the first free end, a first resonance mode supporting a first medium and high frequency band is generated from the first grounding end to the first free end under the excitation of the first feed source, a second resonance mode supporting a second medium and high frequency band is generated from the second grounding end to the second free end under the excitation of the first feed source, and a center frequency point of the second medium and high frequency band is greater than the center frequency point of the first medium and high frequency band; and

[0008] The second antenna unit includes a second antenna radiator and a second feed source arranged on the circuit board, the second antenna radiator includes a second radiating section and a third radiating section that are connected in a bent manner, the second radiating section is arranged on the bottom frame and is located on the side of the first parasitic section away from the first radiating section, the third radiating section is arranged on the right side frame, the second radiating section or the third radiating section includes a second feeding point, the second feeding point is electrically connected to the second feed source, and the second antenna radiator generates a third resonant mode supporting a target low-frequency band under the excitation of the second feed source.

[0009] In the electronic device provided in the present application, the first antenna unit can support medium and high frequency communications, and the second antenna unit can support low frequency communications. The first feed source of the first antenna unit and the second feed source of the second antenna unit are arranged on the same circuit board. Therefore, while taking into account medium and high frequency and low frequency communications, the number of circuit boards can be reduced and the cost can be reduced. The first antenna radiator of the first antenna unit includes a first radiating section and a first parasitic section, the first radiating section includes a first grounding end, a first feeding point and a first free end, the first grounding end is grounded, the first feeding point is electrically connected to the first feed source, the first parasitic section includes a second grounding end and a second free end, the second grounding end is grounded, and a first coupling gap is formed between the second free end and the first free end, the first grounding end to the first free end generates a first resonance mode supporting the first medium and high frequency band under the excitation of the first feed source, the second grounding end to the second free end generates a second resonance mode supporting the second medium and high frequency band under the excitation of the first feed source, the center frequency of the second medium and high frequency band is greater than the center frequency of the first medium and high frequency band, so that the first medium and high frequency band and the second medium and high frequency band can basically cover the entire medium and high frequency band, so there is no need to set a switch to switch the working frequency band of the first antenna unit, which can reduce the number of switches in the electronic device and further reduce the cost. In addition, it has been verified by experiments that the electronic device provided by the present application can ensure that the electronic device has the same free and head-hand performance as the mobile phone in the related technology while reducing the number of circuit boards and switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] 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.

[0011] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0012] Figure 2 for Figure 1 A back view of a frame, a circuit board, a first antenna unit and a second antenna unit in the electronic device shown;

[0013] Figure 3 for Figure 2 A schematic diagram of the structure of the first antenna unit in the electronic device shown, wherein the first radiation section of the first antenna unit includes a first ground terminal, a first feeding point and a first free end, the first parasitic section includes a second ground terminal and a second free end, and the second antenna unit;

[0014] Figure 4 for Figure 3 A schematic diagram of current distribution in a first resonant mode generated from a first ground terminal to a first free terminal of the electronic device shown;

[0015] Figure 5 for Figure 3A schematic diagram of current distribution from the second ground terminal to the second free terminal of the electronic device generating a second resonance mode;

[0016] Figure 6 for Figure 2 A schematic diagram of the structure in which the first antenna radiator and the second antenna radiator of the electronic device are arranged inside the frame;

[0017] Figure 7 for Figure 3 The electronic device shown also includes a structural schematic diagram of a first tuning circuit disposed on the circuit board;

[0018] Figure 8 for Figure 7 A return loss curve graph of a first antenna unit in the electronic device shown;

[0019] Fig. 9 for Figure 7 An efficiency curve diagram of the first antenna unit in the electronic device shown;

[0020] Fig.10 for Figure 3 A schematic structural diagram showing that the second radiation section of the second antenna unit in the electronic device includes a third free end, and the third radiation section includes a fourth free end;

[0021] Fig.11 for Fig.10 A schematic diagram of current distribution in a third resonance mode generated from a third free end to a fourth free end of the electronic device shown;

[0022] Fig.12 for Fig.10 A schematic diagram of current distribution in a fourth resonance mode generated from a third free end to a fourth free end of the electronic device shown;

[0023] Fig.13 for Fig.10 A return loss curve diagram of a second antenna unit in the electronic device shown;

[0024] Fig.14 for Fig.10 An efficiency curve diagram of a second antenna unit in the electronic device shown;

[0025] Fig.15 for Fig.10 The electronic device shown also includes a structural schematic diagram of a second tuning circuit disposed on the circuit board;

[0026] Fig.16 for Fig.15 A schematic structural diagram of a fracture formed between the third free end and the second grounding end of the electronic device;

[0027] Fig.17 for Fig.16The electronic device shown also includes a schematic diagram of the structure of a battery and an electro-acoustic component;

[0028] Fig.18 for Fig.17 The second antenna radiator of the electronic device shown further includes a structural schematic diagram of a second parasitic segment.

[0029] Description of reference numerals:

[0030] Electronic device 100; frame 10; circuit board 20; first antenna unit 30; second antenna unit 40; top frame 101; left frame 102; bottom frame 103; right frame 104; accommodating space 105; first radiating section 310; first parasitic section 311; first grounding end 3101; first feeding point 3102; first free end 3103; second grounding end 3110; second free end 3111; first coupling gap 312; second antenna radiator 401; second feed source 402; first Second radiation section 410; third radiation section 411; second feeding point 4110; first tuning point 3112; first tuning circuit 303; third free end 4101; fourth free end 4111; second tuning point 4102; second tuning circuit 403; break 50; battery 60; electro-acoustic component 70; first edge 201; second edge 202; third edge 203; fourth edge 204; second parasitic section 412; fifth free end 4120; third grounding end 4121; second coupling gap 413. DETAILED DESCRIPTION

[0031] 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 are within the scope of protection of the present application.

[0032] Mentioning "embodiment" or "implementation method" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment or implementation method may be included in at least one embodiment of this application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent or alternative embodiment with 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.

[0033] The terms "first", "second", etc. in the specification, claims and the above-mentioned description of the drawings of this application are used to distinguish different objects, rather than to describe a specific order. The terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device that includes one or more parts is not limited to the one or more parts listed, but optionally also includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described functions. In addition, the terms "end" and "point" in the specification, claims and the above-mentioned description of the drawings of this application 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 the end, and "point" cannot be narrowly understood as a point.

[0034] like Figure 1 As shown, Figure 1 A schematic diagram of the structure of an electronic device 100 provided in an embodiment of the present application. The electronic device 100 provided in the present application can be a mobile phone, a tablet or other device with communication functions. In the embodiment of the present application, a mobile phone is taken as an example. The electronic device 100 includes a frame 10, a circuit board 20, a first antenna unit 30 and a second antenna unit 40. Of course, the electronic device 100 may also include a mainboard, a display screen, a camera module, etc. The following embodiments are established for the convenience of description. Figure 1 In the coordinate system shown, the direction indicated by the X-axis can be understood as the width direction of the electronic device 100 , and the direction indicated by the Y-axis can be understood as the length direction of the electronic device 100 .

[0035] like Figure 2 As shown, Figure 2 for Figure 1 The illustrated electronic device 100 is a back view of the frame 10, the circuit board 20, the first antenna unit 30 and the second antenna unit 40. The back view is a schematic diagram when the electronic device 100 is viewed from the back side (the side away from the display screen).

[0036] Among them, the frame 10 includes a top frame 101, a left frame 102, a bottom frame 103 and a right frame 104 connected end to end in sequence. The top frame 101 can be understood as the frame located at the top when the electronic device 100 is used in portrait mode. The bottom frame 103 can be understood as the frame located at the bottom when the electronic device 100 is used in portrait mode. The left frame 102 refers to the frame on the left side in the back view. The right frame 104 refers to the frame on the right side in the back view. The top frame 101 and the bottom frame 103 are arranged relative to each other along the length direction of the electronic device 100. The left frame 102 and the right frame 104 are arranged relative to each other along the width direction of the electronic device 100. In this application, the lengths of the top frame 101 and the bottom frame 103 are relatively short, and the lengths of the left frame 102 and the right frame 104 are relatively long. An accommodating space 105 is formed between the top frame 101, the left frame 102, the bottom frame 103 and the right frame 104.

[0037] The circuit board 20 is accommodated in the accommodating space 105. In the present application, the circuit board 20 is a sub-board of the electronic device 100, and the circuit board 20 is arranged near the bottom frame 103. When divided by the number of structural layers, the circuit board 20 can be one of a single-sided circuit board, a double-sided circuit board, and a multi-layer circuit board. When divided by bending characteristics, the circuit board 20 can be one of a flexible circuit board, a rigid circuit board, and a rigid-flexible board. When divided by molding process, the circuit board 20 can be one of a printed circuit board (Printed Circuit Boards, PCB), a flexible printed circuit board (Flexible Printed Circuit, FPC), a laser circuit board (Laser Direct Structuring, LDS), etc. The circuit board 20 includes a ground layer.

[0038] The first antenna unit 30 includes a first antenna radiator 301 provided on the bottom frame 103 and a first feed source 302 provided on the circuit board 20. The first antenna radiator 301 is a conductor with a specific shape and size, and is used to receive and / or transmit electromagnetic waves. The first antenna radiator 301 provided on the bottom frame 103 may be the first antenna radiator 301 integrated into the bottom frame 103, that is, the bottom frame 103 of the first antenna radiator 301 reuses the part, or the first antenna radiator 301 may be provided on the inner side of the bottom frame 103. In other words, the first antenna radiator 301 may be a frame antenna radiator or a built-in antenna radiator. When the first antenna radiator 301 is a built-in antenna radiator, the first antenna radiator 301 may be one of an FPC antenna radiator, an LDS antenna radiator, a direct printing (Printing Direct Structure, PDS) antenna radiator, and the like. The first feed source 302 can be understood as a port of the first antenna unit 30 on the circuit board 20 for electrically connecting the radio frequency chip. The first feed source 302 may be located relatively close to the first antenna radiator 301 on the circuit board 20. The radio frequency chip is usually disposed on the main board of the electronic device 100.

[0039] Please refer to Figure 2 and Figure 3, the first antenna radiator 301 includes a first radiating section 310 and a first parasitic section 311 located on the side of the first radiating section 310 away from the left side frame 102. It can be understood that the first parasitic section 311 is located between the first radiating section 310 and the right side frame 104. The first radiating section 310 includes a first grounding end 3101, a first feeding point 3102 and a first free end 3103. The first grounding end 3101 is grounded. In this application, the "grounding end" can be understood as an end that is directly or indirectly electrically connected to the reference floor, and the "free end" can be understood as an end that is not electrically connected to a conductive member or has a gap between the conductive member, which will not be repeated later. Among them, the reference floor refers to a part of the electronic device 100 that is not affected by any grounding configuration and is regarded as a conductive earth. The potential of the reference floor is agreed to be zero. For example: the reference floor may include the grounding layer of the main board in the electronic device 100, the grounding layer of the auxiliary circuit board, the metal parts of the middle frame, and the conductive parts electrically connected to one or more of the grounding layer of the main board, the grounding layer of the auxiliary circuit board, and the metal parts of the middle frame. In a possible implementation, the first ground terminal 3101, the first feeding point 3102 and the first free end 3103 may be arranged in sequence and spaced apart. In another possible implementation, the first feeding point 3102 may be arranged at the first free end 3103. The first feeding point 3102 is electrically connected to the first feed source 302. The first feeding point 3102 and the first feed source 302 may be directly electrically connected, or may be indirectly electrically connected through an electrical connector such as a metal spring. The first parasitic section 311 includes a second ground terminal 3110 and a second free end 3111. The second ground terminal 3110 is grounded. A first coupling gap 312 is formed between the second free end 3111 and the first free end 3103. It can be understood that the first ground terminal 3101, the first free end 3103, the second free end 3111 and the second ground terminal 3110 are arranged in sequence in the first antenna radiator 301. The size of the first coupling gap 312 between the second free end 3111 and the first free end 3103 may be 0.5 mm to 2 mm. The first radiation section 310 and the first parasitic section 311 are coupled via the first coupling gap 312 to achieve mutual energy transmission. The coupling between the first radiation section 310 and the first parasitic section 311 may include electric field coupling between the first radiation section 310 and the first parasitic section 311 and / or magnetic field coupling between the first radiation section 310 and the first parasitic section 311.

[0040] Please refer to Figures 3 to 5, the first ground end 3101 to the first free end 3103 generates a first resonance mode supporting the first medium and high frequency band under the excitation of the first feed source 302. The second ground end 3110 to the second free end 3111 generates a second resonance mode supporting the second medium and high frequency band under the excitation of the first feed source 302. In other words, the first antenna radiator 301 generates a first resonance mode supporting the first medium and high frequency band between the first ground end 3101 and the first free end 3103 under the excitation of the first feed source 302, and generates a second resonance mode supporting the second medium and high frequency band between the second ground end 3110 and the second free end 3111. It can be understood that the resonant current of the first resonance mode is distributed from the first ground end 3101 to the first free end 3103. The resonant current of the second resonance mode is distributed from the second ground end 3110 to the second free end 3111. The resonant current of the first resonance mode can be referred to in the attached Figure 4 The resonant current of the second resonant mode can be found in the attached Figure 5 As shown in I2. Among them, the first resonant mode and the second resonant mode exist at the same time. The first medium and high frequency band is different from the second medium and high frequency band. The medium and high frequency band is a frequency band of 1GHz to 3GHz. The first medium and high frequency band and the second medium and high frequency band are both sub-bands in the medium and high frequency band. The center frequency of the second medium and high frequency band is greater than the center frequency of the first medium and high frequency band. The center frequency of the first medium and high frequency band is the concave point of the first medium and high frequency band in the return loss curve (S11) of the first antenna unit 30. The center frequency of the second medium and high frequency band is the concave point of the second medium and high frequency band in S11 of the first antenna unit 30. In a possible implementation, the center frequency of the first medium and high frequency band can be located at 1GHz to 2GHz, and the center frequency of the second medium and high frequency band can be located at 2GHz to 3GHz. In the present application, the first medium and high frequency band and the second medium and high frequency band form a wide band. In other words, the first medium and high frequency band and the second medium and high frequency band are continuous. It can be understood that the maximum frequency of the first medium and high frequency band is greater than or equal to the minimum frequency of the second medium and high frequency band.

[0041] By making the first grounded end 3101 to the first free end 3103 of the first antenna radiator 301 generate a first resonance mode supporting the first medium and high frequency band under the excitation of the first feed source 302, and the second grounded end 3110 to the second free end 3111 generate a second resonance mode supporting the second medium and high frequency band under the excitation of the first feed source 302, basically full coverage of commonly used medium and high frequency bands can be achieved. Therefore, the electronic device 100 provided in the present application does not need to design a switching switch in the first antenna unit 30 to achieve multi-frequency or broadband by switching frequency bands, thereby reducing the number of switches in the medium and high frequency antenna units of the electronic device 100 and reducing costs.

[0042] Please refer to Figure 2 and Figure 3, the second antenna unit 40 includes a second antenna radiator 401 and a second feed source 402 provided on the circuit board 20. The second antenna radiator 401 is a conductor with a specific shape and size, and is used to receive and / or transmit electromagnetic waves. Specifically, the second antenna radiator 401 includes a second radiating section 410 and a third radiating section 411 connected by bending, the second radiating section 410 is provided on the bottom frame 103 and is located on the side of the first parasitic section 311 away from the first radiating section 310, and the third radiating section 411 is provided on the right side frame 104. Among them, the second radiating section 410 provided on the bottom frame 103 can be the second radiating section 410 integrated in the bottom frame 103, that is, the bottom frame 103 of the second radiating section 410 reuse part, or the second radiating section 410 can be provided on the inner side of the bottom frame 103. In the extension direction along the bottom frame 103, that is, the width direction of the electronic device 100, the first radiating section 310, the first parasitic section 311 and the second radiating section 410 are arranged in sequence. The third radiation section 411 is arranged on the right side frame 104. The third radiation section 411 can be integrated into the right side frame 104, that is, the third radiation section 411 reuses part of the right side frame 104, or the third radiation section 411 is arranged on the inner side of the right side frame 104. In one possible implementation, the second radiation section 410 can reuse part of the bottom frame 103, and the third radiation section 411 can reuse part of the right side frame 104. In another possible implementation, the second radiation section 410 can be arranged on the inner side of the bottom frame 103, and the third radiation section 411 can be arranged on the inner side of the right side frame 104. The second feed source 402 can be understood as a port of the second antenna unit 40 on the circuit board 20 for electrically connecting the radio frequency chip. The position of the second feed source 402 on the circuit board 20 can be relatively close to the second antenna radiator 401.

[0043] The second radiation section 410 or the third radiation section 411 includes a second feeding point 4110, and the second feeding point 4110 is electrically connected to the second feed source 402. In a possible implementation, the second radiation section 410 includes the second feeding point 4110, and the second feed source 402 is disposed on the circuit board 20 and close to the second radiation section 410. In this implementation, the second feed source 402 and the second feeding point 4110 can be arranged opposite to each other along the length direction of the electronic device 100. In another possible implementation, the third radiation section 411 includes the second feeding point 4110, and the second feed source 402 is disposed on the circuit board 20 and close to the third radiation section 411. In this implementation, the second feed source 402 and the second feeding point 4110 can be arranged opposite to each other along the width direction of the electronic device 100. The second feeding point 4110 and the second feed source 402 can be directly electrically connected, or can be indirectly electrically connected through electrical connectors such as metal springs.

[0044] The second antenna radiator 401 generates a third resonance mode supporting the target low frequency band under the excitation of the second feed source 402. It can be understood that the resonance current of the third resonance mode is distributed in at least part of the second antenna radiator 401. The low frequency band is a frequency band less than 1 GHz. The target low frequency band is a sub-band in the low frequency band.

[0045] In a possible embodiment, Figure 2 As shown, the frame 10 may be a conductive frame such as metal or alloy. The first antenna radiator 301 and the second antenna radiator 401 respectively reuse part of the frame 10. Specifically, the first radiation segment 310 and the first parasitic segment 311 of the first antenna radiator 301 and the second radiation segment 410 of the second antenna radiator 401 respectively reuse part of the bottom frame 103, and the third radiation segment 411 of the second antenna radiator 401 reuses part of the right side frame 104.

[0046] In another possible embodiment, Figure 6 As shown, the frame 10 can be a non-conductive frame such as plastic or glass. The first antenna radiator 301 and the second antenna radiator 401 are both disposed on the inner side of the frame 10. Specifically, the first radiating section 310 and the first parasitic section 311 of the first antenna radiator 301 and the second radiating section 410 of the second antenna radiator 401 are disposed on the inner side of the bottom frame 103, respectively, and the third radiating section 411 of the second antenna radiator 401 is disposed on the inner side of the right frame 104.

[0047] In the electronic device 100 provided in the present application, the first antenna unit 30 can support medium and high frequency communications, and the second antenna unit 40 can support low frequency communications. The first feed source 302 of the first antenna unit 30 and the second feed source 402 of the second antenna unit 40 are arranged on the same circuit board 20. Therefore, while taking into account medium and high frequency and low frequency communications, the number of circuit boards 20 can be reduced and the cost can be reduced. The first antenna radiator 301 of the first antenna unit 30 includes a first radiating section 310 and a first parasitic section 311. The first radiating section 310 includes a first grounding end 3101, a first feeding point 3102 and a first free end 3103. The first grounding end 3101 is grounded, and the first feeding point 3102 is electrically connected to the first feed source 302. The first parasitic section 311 includes a second grounding end 3110 and a second free end 3111. The second grounding end 3110 is grounded, and a first coupling gap 312 is formed between the second free end 3111 and the first free end 3103. The first grounding end 3101 to the first free end 3103 generates a first medium and high frequency support under the excitation of the first feed source 302. The first resonance mode of the frequency band, the second grounding end 3110 to the second free end 3111 generates a second resonance mode supporting the second medium and high frequency band under the excitation of the first feed source 302, and the center frequency of the second medium and high frequency band is greater than the center frequency of the first medium and high frequency band, so that the first resonance mode generated by the first grounding end 3101 to the first free end 3103 under the excitation of the first feed source 302 and the second resonance mode generated by the second grounding end 3110 to the second free end 3111 can basically cover the entire medium and high frequency band, so there is no need to set a switch to switch the working frequency band of the first antenna unit 30, which can reduce the number of switches in the electronic device 100 and further reduce the cost. In addition, it has been verified by experiments that the electronic device 100 provided in the present application can ensure that the electronic device 100 has the same freedom and head-to-hand performance as the mobile phone in the related art while reducing the number of circuit boards 20 and switches.

[0048] like Figure 7 As shown, the first parasitic section 311 also includes a first tuning point 3112, and the first tuning point 3112 is set between the second free end 3111 and the midpoint of the first parasitic section 311. The midpoint of the first parasitic section 311 is the middle position between the second grounding end 3110 and the second free end 3111. It can be understood that the first tuning point 3112 is relatively close to the second free end 3111 and relatively far away from the second grounding end 3110. Optionally, the distance between the first tuning point 3112 and the second free end 3111 can be less than or equal to 1 / 16 wavelength of the second medium and high frequency band.

[0049] The first antenna unit 30 also includes a first tuning circuit 303 provided on the circuit board 20. The first tuning circuit 303 may include capacitors and / or inductors, etc. The present application does not specifically limit the number of capacitors and inductors included in the first tuning circuit 303. When the first tuning circuit 303 includes multiple capacitors, the multiple capacitors may be connected in series or in parallel. When the first tuning circuit 303 includes multiple inductors, the multiple inductors may be connected in series or in parallel. When the first tuning circuit 303 includes one or more capacitors and one or more inductors, the inductors and capacitors may be connected in series or in parallel. In a possible implementation, the first tuning circuit 303 may include an inductor connected in series with the first parasitic section 311. The first tuning circuit 303 is electrically connected to the first tuning point 3112. The first tuning circuit 303 and the first tuning point 3112 may be directly electrically connected, or may be indirectly electrically connected through electrical connectors such as metal springs.

[0050] The first tuning circuit 303 is used to tune the center frequency of the second medium and high frequency band. The setting of the first tuning circuit 303 can change the electrical length of the first parasitic section 311, so as to tune the center frequency of the second medium and high frequency band. In a possible implementation, the first tuning circuit 303 is used to tune the center frequency of the second medium and high frequency band so that the difference between the center frequency of the second medium and high frequency band and the center frequency of the first medium and high frequency band is greater than or equal to a preset difference. The preset difference is designed to achieve that the first medium and high frequency band and the second medium and high frequency band can basically cover the commonly used medium and high frequency full frequency band. Optionally, the preset difference can be greater than or equal to 0.5 GHz and less than or equal to 1.5 GHz.

[0051] Since the second grounding end 3110 in the first parasitic section 311 is short-circuited and the current is relatively strong, while the second free end 3111 is open-circuited and the electric field is relatively strong, the first tuning point 3112 is set between the second free end 3111 and the midpoint of the first parasitic section 311, which is more conducive to changing the current distribution of the first parasitic section 311, so that the first tuning circuit 303 can be more effectively utilized to tune the center frequency of the second mid-high frequency band to achieve a difference between the center frequency of the second mid-high frequency band and the center frequency of the first mid-high frequency band greater than or equal to the preset difference.

[0052] By making the first parasitic section 311 also include a first tuning point 3112, the first antenna unit 30 also includes a first tuning circuit 303 arranged on the circuit board 20, and the first tuning circuit 303 is electrically connected to the first tuning point 3112, it is possible to achieve tuning of the second medium and high frequency band when the size of the first parasitic section 311 is limited by the structure of the bottom frame 103 or the position of the first coupling gap 312, thereby facilitating the first resonant mode and the second resonant mode to basically cover the entire medium and high frequency band.

[0053] The length of the first radiation section 310 is at least 2 mm longer than the length of the first parasitic section 311. In the embodiment of the present application, the length of the first radiation section 310 is the dimension of the first radiation section 310 along the width direction of the electronic device 100, and the length of the first parasitic section 311 is the dimension of the first parasitic section 311 along the width direction of the electronic device 100. In a possible implementation, the length of the first radiation section 310 may be 18 mm to 25 mm, and the length of the first parasitic section 311 may be 12 mm to 16 mm. By making the length of the first radiation section 310 at least 2 mm longer than the length of the first parasitic section 311, the resonant current generated by the first resonance mode in the first parasitic section 311 can be reduced or avoided, and the resonant current generated by the second resonance mode in the first radiation section 310 can be reduced or avoided, so that the resonant current of the first resonance mode is concentrated from the first ground end 3101 to the first free end 3103, and the resonant current of the second resonance mode is concentrated from the second ground end 3110 to the second free end 3111, so as to achieve a larger difference between the center frequency of the second mid-high frequency band and the center frequency of the first mid-high frequency band, so that the first mid-high frequency band and the second mid-high frequency band can jointly cover a wider mid-high frequency band.

[0054] The first resonant mode is a 1 / 4 wavelength mode corresponding to the first medium and high frequency band. It can be understood that the electrical length of the first radiation section 310 is close to 1 / 4 wavelength of the center frequency of the first medium and high frequency band. For example: the difference between the electrical length of the first radiation section 310 and 1 / 4 wavelength of the center frequency of the first medium and high frequency band can be less than or equal to 1 / 10 wavelength of the center frequency of the first medium and high frequency band. The electrical length of the first radiation section 310 can be K1﹡L1. Among them, L1 is the physical length of the first radiation section 310. K1 is the ratio of the transmission time of the electromagnetic wave signal of the first medium and high frequency band in the medium to the transmission time in the free space. The distribution of the resonant current of the first resonant mode in the first radiation section 310 basically conforms to the strong to weak distribution from the first ground end 3101 to the first free end 3103. In a possible embodiment, the first medium and high frequency band may include at least the B3 band (1.71GHz~1.88GHz).

[0055] The second resonant mode is a 1 / 4 wavelength mode corresponding to the second medium and high frequency band. It can be understood that the electrical length of the first parasitic section 311 is close to 1 / 4 wavelength of the center frequency of the second medium and high frequency band. For example: the difference between the electrical length of the first parasitic section 311 and 1 / 4 wavelength of the center frequency of the second medium and high frequency band can be less than or equal to 1 / 10 wavelength of the center frequency of the second medium and high frequency band. The electrical length of the first parasitic section 311 can be K2﹡L2. Among them, L2 is the physical length of the first radiation section 310. K2 is the ratio of the transmission time of the electromagnetic wave signal of the second medium and high frequency band in the medium to the transmission time in the free space. The distribution of the resonant current of the second resonant mode in the first parasitic section 311 basically conforms to the strong to weak distribution from the second ground end 3110 to the second free end 3111. In a possible embodiment, the second medium and high frequency band may include at least the B41 band (2.49GHz~2.69GHz).

[0056] like Figure 8 As shown, Figure 8 for Figure 7 The return loss curve of the first antenna unit 30 in the electronic device 100 is shown. The first medium and high frequency band and the second medium and high frequency band cover 1.6 GHz to 2.9 GHz. Specifically, the first medium and high frequency band can basically cover 1.6 GHz to 2.5 GHz, and the center frequency of the first medium and high frequency band can be around 2 GHz. The center frequency of the first medium and high frequency band can refer to the attached Figure 8 The second mid-high frequency band can basically cover 2.5GHz to 2.9GHz, and the center frequency of the second mid-high frequency band can be around 2.8GHz. The center frequency of the second mid-high frequency band can refer to the attached Figure 8 Point b as shown. Fig. 9 As shown, Fig. 9 for Figure 7 An efficiency curve diagram of the first antenna unit 30 in the electronic device 100 is shown. Fig. 9 Curve 1 is the radiation efficiency curve of the first antenna unit 30, and curve 2 is the system efficiency curve of the first antenna unit 30. Fig. 9 It can be seen that the first antenna unit 30 has a higher efficiency in the first medium and high frequency band and the second medium and high frequency band.

[0057] By making the first medium and high frequency band and the second medium and high frequency band cover 1.6GHz to 2.9GHz, it is possible to basically cover commonly used medium and high frequency bands such as B1 (1.92GHz~2.17GHz), B2 (1.85GHz~1.99GHz), B3, B7 (2.5GHz~2.69GHz), B34 (2.01GHz~2.02GHz), B38 (2.57GHz~2.62GHz), B39 (1.88GHz~1.92GHz), B40 (2.3GHz~2.4GHz), and B41. This allows the medium and high frequency communication of the electronic device 100 to be achieved without setting a switch in the first antenna unit 30, thereby reducing the cost of the electronic device 100.

[0058] Among them, the first grounding terminal 3101 is arranged at one end of the bottom frame 103 connected to the left frame 102. It can be understood that the first grounding terminal 3101 is arranged at the corner formed by the bottom frame 103 and the left frame 102. The first feeding point 3102 is arranged between the first free end 3103 and the midpoint of the first radiation section 310. It can be understood that the first feeding point 3102 is relatively close to the first free end 3103 and relatively far away from the first grounding terminal 3101. Optionally, the distance between the first feeding point 3102 and the first free end 3103 can be less than or equal to 1 / 16 wavelength of the first medium and high frequency band. The first parasitic section 311 is provided with a USB interface. The length of the first parasitic section 311 is longer than the length of the USB interface. It can be understood that in this embodiment, a section of the bottom frame 103 with a USB interface in the bottom frame 103 is reused to form the first parasitic section 311, and a section of the bottom frame 103 between the USB interface and the left frame 102 is reused to form the first radiation section 310.

[0059] Since the first parasitic section 311 is provided with a USB interface, the length of the first parasitic section 311 is limited by the USB interface. Therefore, by making the first parasitic section 311 also include a first tuning point 3112, the first antenna unit 30 also includes a first tuning circuit 303 provided on the circuit board 20, and the first tuning circuit 303 is electrically connected to the first tuning point 3112, the first parasitic section 311 can generate a second resonance mode supporting the second medium and high frequency band under the excitation of the first feed source 302, and by making the first grounding end 3101 be provided at one end of the bottom frame 103 connected to the left frame 102, the electrical length requirement for the first radiation section 310 to generate the first resonance mode can be met, and the first grounding end 3101 to the first free end 3103 can generate a first resonance mode supporting the first medium and high frequency band under the excitation of the first feed source 302, and the first medium and high frequency band and the second medium and high frequency band jointly cover the commonly used medium and high frequency bands. The first feeding point 3102 is disposed between the first free end 3103 and the midpoint of the first radiation section 310 and can be close to the circuit board 20 while realizing the first resonance mode, thereby facilitating electrical connection between the first feed source 302 disposed on the circuit board 20 and the first feeding point 3102 .

[0060] In one possible embodiment, please refer to Figures 10 to 12 , one end of the second radiation section 410 away from the third radiation section 411 forms a third free end 4101, and one end of the third radiation section 411 away from the second radiation section 410 forms a fourth free end 4111. It can be understood that the third free end 4101 is arranged on the bottom frame 103, and the fourth free end 4111 is arranged on the right side frame 104. The third free end 4101 and the fourth free end 4111 are open ends of the second antenna radiator 401. The second antenna unit 40 of this embodiment can be understood as a T-type antenna unit. The third free end 4101 to the fourth free end 4111 generate the third resonance mode and the fourth resonance mode supporting the third medium and high frequency band under the excitation of the second feed source 402. The target low frequency band supported by the third resonance mode may include one or more 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). The third mid-high frequency band may include any sub-band in the 1 GHz to 1.5 GHz band.

[0061] The third resonant mode includes a 1 / 4 wavelength mode formed by a first resonant current generated between the second feeding point 4110 and the third free end 4101, and a 1 / 4 wavelength mode formed by a second resonant current generated between the second feeding point 4110 and the fourth free end 4111, and the flow direction of the second resonant current is opposite to that of the first resonant current. The first resonant current can refer to the attached Fig.11The second resonant current can refer to the attached Fig.11 As shown in I4. The first resonant current is distributed from the second feeding point 4110 to the third free end 4101. The second resonant current is distributed from the second feeding point 4110 to the fourth free end 4111. The distribution of the first resonant current from the second feeding point 4110 to the third free end 4101 basically conforms to from strong to weak. The distribution of the second resonant current from the second feeding point 4110 to the fourth free end 4111 basically conforms to from strong to weak. The center frequency of the target low-frequency band can be tunable by designing the length of the second antenna radiator 401 and the position of the second feeding point 4110.

[0062] The fourth resonant mode includes a 1 / 2 wavelength mode formed by a third resonant current generated between the third free end 4101 and the fourth free end 4111. The third resonant current may refer to the attached Fig.12 As shown in I5. The third resonant current is distributed from the third free end 4101 to the fourth free end 4111. The distribution of the third resonant current from the third free end 4101 to the fourth free end 4111 basically conforms to weak-strong-weak. The center frequency of the third medium and high frequency band can be tuned by designing the length of the second antenna radiator 401.

[0063] By tuning the center frequency of the target low frequency band, communication in low frequency bands such as the B5 band, the B8 band, the B20 band, or the B28 band can be achieved. By tuning the center frequency of the third medium and high frequency band so that the center frequency of the third medium and high frequency band is close to the center frequency of the target low frequency band, the communication efficiency of the second antenna unit 40 in the target low frequency band can be improved, and by making the center frequency of the third medium and high frequency band far away from the center frequency of the target low frequency band, dual-frequency communication of the second antenna unit 40 can be achieved, and the communication frequency band of the electronic device 100 can be expanded.

[0064] like Fig.13 As shown, Fig.13 for Fig.10 The return loss curve of the second antenna unit 40 in the electronic device 100 is shown in FIG. The center frequency of the target low frequency band can be referred to in the attached Fig.13 The center frequency of the target low frequency band can be around 0.75 GHz. The center frequency of the third mid-high frequency band can refer to the attached Fig.13 The center frequency of the third mid-high frequency band can be around 1.22 GHz. Fig.14 As shown, Fig.14 for Fig.10 FIG. 1 is a graph showing an efficiency curve of the second antenna unit 40 in the electronic device 100 . Fig.14 Curve 3 is the radiation efficiency curve of the second antenna unit 40, and curve 4 is the system efficiency curve of the second antenna unit 40. Fig.14 It can be seen that the efficiency of the second antenna unit 40 is higher in the target low frequency band.

[0065] Furthermore, if Fig.15 As shown, the second radiation section 410 or the third radiation section 411 also includes a second tuning point 4102, and the second tuning point 4102 is set in the electric field strength area of ​​the third resonance mode. In a possible implementation, the second radiation section 410 includes the second tuning point 4102, and the second feeding point 4110 is set on the side of the second tuning point 4102 away from the third free end 4101, and the distance between the second tuning point 4102 and the second feeding point 4110 is greater than the distance between the second tuning point 4102 and the third free end 4101. It can be understood that the second tuning point 4102 is relatively close to the third free end 4101 and relatively far away from the second feeding point 4110. Optionally, the distance between the second tuning point 4102 and the third free end 4101 can be less than or equal to 1 / 16 wavelength of the target low frequency band. In another possible implementation, the third radiation section 411 includes a second tuning point 4102, a second feeding point 4110 is disposed on a side of the second tuning point 4102 away from the fourth free end 4111, and a distance between the second tuning point 4102 and the second feeding point 4110 is greater than a distance between the second tuning point 4102 and the third free end 4101. It can be understood that the second tuning point 4102 is relatively close to the fourth free end 4111 and relatively far from the second feeding point 4110. Optionally, the distance between the second tuning point 4102 and the fourth free end 4111 may be less than or equal to 1 / 16 wavelength of the target low frequency band.

[0066] The second antenna unit 40 also includes a second tuning circuit 403 provided on the circuit board 20. The second tuning circuit 403 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 403. When the second tuning circuit 403 includes multiple capacitors, the multiple capacitors may be connected in series or in parallel. When the second tuning circuit 403 includes multiple inductors, the multiple inductors may be connected in series or in parallel. When the second tuning circuit 403 includes one or more capacitors and one or more inductors, the inductors and the capacitors may be connected in series or in parallel. The second tuning circuit 403 is electrically connected to the second tuning point 4102. The second tuning circuit 403 and the second tuning point 4102 may be directly electrically connected, or may be indirectly electrically connected through electrical connectors such as metal shrapnel.

[0067] The second tuning circuit 403 is used to tune the center frequency of the target low frequency band. By setting the second tuning circuit 403, the second antenna unit 40 can support the target low frequency band when the length of the second antenna radiator 401 is limited.

[0068] The second tuning circuit 403 includes a switch and multiple sub-tuning circuits, one end of the switch is electrically connected to the second tuning point 4102, and the other end of the switch is electrically connected and switched among the multiple sub-tuning circuits. The second tuning circuit 403 is used to switch the target low frequency band.

[0069] The present application does not specifically limit the number of sub-tuning circuits. For example, the number of sub-tuning circuits can be two, three, or four. The switching switch can include multiple single-pole single-throw switches, or one or more multi-pole multi-throw switches, or multiple multi-pole multi-throw switches. In a possible implementation, the second tuning circuit 403 may include a single-pole four-throw switching switch and three sub-tuning circuits. The three sub-tuning circuits are described as a first sub-tuning circuit, a second sub-tuning circuit, and a third sub-tuning circuit, respectively. When the other end of the switching switch is electrically connected to the first sub-tuning circuit, the second antenna radiator 401 can generate a third resonant mode supporting the B5 frequency band under the excitation of the second feed source 402. When the other end of the switching switch is electrically connected to the second sub-tuning circuit, the second antenna radiator 401 can generate a third resonant mode supporting the B8 frequency band under the excitation of the second feed source 402. When the other end of the switching switch is electrically connected to the third sub-tuning circuit, the second antenna radiator 401 can generate a third resonant mode supporting the B28 frequency band under the excitation of the second feed source 402.

[0070] By making the second tuning circuit 403 include a switch and multiple sub-tuning circuits, the target low frequency band can be switched, so that the second antenna unit 40 can support multiple low frequency bands such as B5 band, B8 band, B20 band, B28 band, etc.

[0071] In a possible embodiment, the second feeding point 4110 is disposed in the third radiation section 411. The second tuning point 4102 is disposed between the midpoint of the second radiation section 410 and the third free end 4101. The midpoint of the second radiation section 410 is the middle position between the third free end 4101 and one end of the second radiation section 410 connected to the third radiation section 411. It can be understood that the second tuning point 4102 is relatively close to the third free end 4101 and relatively far away from the third radiation section 411. Optionally, the distance between the second tuning point 4102 and the third free end 4101 can be less than or equal to 1 / 16 wavelength of the target low frequency band.

[0072] Since the third free end 4101 in the second radiation section 410 is open, the electric field is strong, and the end of the second radiation section 410 connected to the third radiation section 411 is close to the second feeding point 4110 and the current is strong. Therefore, the second tuning point 4102 is set between the midpoint of the second radiation section 410 and the third free end 4101, which is more conducive to changing the current distribution of the second antenna radiator 401, so that the second tuning circuit 403 can be more effectively utilized to tune the center frequency of the target low-frequency band, so as to realize the second antenna unit 40 to support multiple low-frequency bands such as B5 band, B8 band, B20 band, B28 band, etc.

[0073] like Fig.16 As shown, a break 50 is formed between the third free end 4101 and the second ground end 3110. The size of the break 50 can be 0.5 mm to 2 mm. It can be understood that the bottom frame 103 includes a first portion of the bottom frame 103 close to the left side frame 102, a second portion of the bottom frame 103 located in the middle area of ​​the bottom frame 103, and a third portion of the bottom frame 103 close to the right side frame 104. The first portion of the bottom frame 103 forms the first radiation segment 310 of the first antenna radiator 301, the second portion of the bottom frame 103 forms the first parasitic segment 311 of the first antenna radiator 301, and the third portion of the bottom frame 103 forms the second radiation segment 410 of the second antenna radiator 401.

[0074] By forming a gap 50 between the third free end 4101 and the second grounding end 3110, the entire bottom frame 103 can be used to form the first antenna radiator 301 or the second antenna radiator 401, so that the first grounding end 3101 to the first free end 3103 generates a first resonance mode supporting the first medium and high frequency band under the excitation of the first feed source 302, the second grounding end 3110 to the second free end 3111 generates a second resonance mode supporting the second medium and high frequency band under the excitation of the first feed source 302, and the second antenna radiator 401 generates a third resonance mode supporting the target low frequency band under the excitation of the second feed source 402. At the same time, for the mobile phone, the position of the fourth free end 4111 of the second antenna radiator 401 can be taken into account to reduce the influence of hand holding on the efficiency of the second antenna radiator 401.

[0075] Furthermore, if Fig.17As shown, the electronic device 100 also includes a battery 60 and an electroacoustic component 70. The battery 60 is accommodated in the accommodating space 105. A sub-accommodating space 151 is formed between the battery 60, the left side frame 102, the bottom frame 103 and the right side frame 104. The circuit board 20 is accommodated in the sub-accommodating space 151. The electroacoustic component 70 is arranged on the side of the circuit board 20 away from the right side frame 104. Among them, the electroacoustic component 70 can be a speaker, or a component integrating a speaker and a receiver, etc. By accommodating the circuit board 20 in the sub-accommodating space 151 and the electroacoustic component 70 on the side of the circuit board 20 away from the right side frame 104, the first feed source 302, the second feed source 402, the first tuning circuit 303 and the second tuning circuit 403 can be arranged on the same circuit board 20, which can reduce the number of circuit boards 20 in the electronic device 100 and reduce costs.

[0076] The circuit board 20 includes a first edge 201, a second edge 202, a third edge 203 and a fourth edge 204 which are connected end to end in sequence. The top frame 101, the first edge 201, the third edge 203 and the bottom frame 103 are arranged in sequence along the length direction of the electronic device 100, and the left frame 102, the second edge 202, the fourth edge 204 and the right frame 104 are arranged in sequence along the width direction of the electronic device 100. The projection point of the second edge 202 on the bottom frame 103 is located on the side of the first feeding point 3102 away from the right frame 104. The first feed source 302 is arranged at the second edge 202. The second feed source 402 is arranged at the third edge 203 when the second feeding point 4110 is arranged at the second radiation section 410, and the second feed source 402 is arranged at the fourth edge 204 when the second feeding point 4110 is arranged at the third radiation section 411.

[0077] By making the circuit board 20 include the first edge 201, the second edge 202, the third edge 203 and the fourth edge 204 which are connected end to end in sequence, the projection point of the second edge 202 on the bottom frame 103 is located on the side of the first feeding point 3102 away from the right frame 104, which is conducive to the first feed source 302 arranged at the second edge 202 being able to be arranged relative to the first feeding point 3102 along the length direction of the electronic device 100, so that the first feed source 302 and the first feeding point 3102 can be directly electrically connected or electrically connected through an electrical connector such as a metal spring, and it is also conducive to the first tuning circuit 303 arranged at the third edge 203 and the first tuning point 3112 being arranged relative to each other along the length direction of the electronic device 100, so that the first tuning circuit 303 It can be directly electrically connected to the first tuning point 3112 or electrically connected through electrical connectors such as metal springs, and it is also beneficial for the second feed source 402 arranged on the fourth edge 204 to be arranged relative to the second feeding point 4110 arranged on the third radiation section 411 along the width direction of the electronic device 100, so that the second feed source 402 and the second feeding point 4110 can be directly electrically connected or electrically connected through electrical connectors such as metal springs, and it is also beneficial for the second tuning circuit 403 arranged on the third edge 203 to be arranged relative to the second tuning point 4102 arranged on the second radiation section 410 along the length direction of the electronic device 100, so that the second tuning circuit 403 and the second tuning point 4102 can be directly electrically connected or electrically connected through electrical connectors such as metal springs.

[0078] Furthermore, if Fig.18As shown, the second antenna radiator 401 also includes a second parasitic section 412. The second parasitic section 412 is arranged on the right side frame 104 and is located on the side of the third radiating section 411 away from the second radiating section 410. The second parasitic section 412 is arranged on the right side frame 104. The second parasitic section 412 can be integrated into the right side frame 104, that is, the right side frame 104 of the second parasitic section 412 multiplexing part, or the second parasitic section 412 is arranged on the inner side of the right side frame 104. One end of the second parasitic section 412 forms a fifth free end 4120, and the other end of the second parasitic section 412 forms a third grounding end 4121. A second coupling gap 413 is formed between the fifth free end 4120 and the fourth free end 4111. The third grounding end 4121 is grounded. It can be understood that the third free end 4101, the fourth free end 4111, the fifth free end 4120 and the third grounding end 4121 in the second antenna radiator 401 are arranged in sequence. The size of the second coupling gap 413 between the fifth free end 4120 and the fourth free end 4111 can be 0.5 mm to 2 mm. The third radiation segment 411 and the second parasitic segment 412 are coupled through the second coupling gap 413, so that energy can be transmitted to each other. The coupling between the third radiation segment 411 and the second parasitic segment 412 can include electric field coupling between the third radiation segment 411 and the second parasitic segment 412 and / or magnetic field coupling between the first radiation segment 310 and the first parasitic segment 311.

[0079] The second parasitic section 412 generates a fifth resonance mode supporting the fourth medium and high frequency band under the excitation of the second feed source 402. It can be understood that the resonant current of the fifth resonance mode is distributed from the fifth free end 4120 to the third ground terminal 4121. The fourth medium and high frequency band may be different from the third medium and high frequency band. In a possible embodiment, the fourth medium and high frequency band may be a WIFI 2.4 GHz band. By making the second antenna radiator 401 also include the second parasitic section 412, the communication frequency band of the second antenna unit 40 can be extended.

[0080] Table 1 Fig.17 The efficiency measured data of the electronic device 100 in the free scene, the right head and hand scene, and the left head and hand scene are shown in Table 2. Table 2 shows the efficiency measured data of the mobile phone in the free scene, the left head and hand scene, and the right head and hand scene in the related art.

[0081] Table 1:

[0082] Free scene Right head hand scene Left head hand scene B5 -7.2dB -12.3dB -11.5dB B3 -4.3dB -9dB -9.3dB B41 -3.6dB -7.5dB -8dB

[0083] Table 2:

[0084] Free scene Right head hand scene Left head hand scene B5 -7.5dB -12.1dB -11.8dB B3 -4dB -8.8dB -9.3dB B41 -3.8dB -7.9dB -8.5dB

[0085] By comparing Table 1 and Table 2, it can be seen that the electronic device 100 provided in the present application can ensure that the freedom and head-to-hand performance of the electronic device 100 are comparable to those of mobile phones in related technologies on the basis of reducing the number of circuit boards and switches.

[0086] 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 top frame, a left frame, a bottom frame and a right frame connected end to end in sequence, wherein a containing space is formed between the top frame, the left frame, the bottom frame and the right frame; A circuit board is accommodated in the accommodation space; A first antenna unit, comprising a first antenna radiator arranged on the bottom frame and a first feed source arranged on the circuit board, the first antenna radiator comprising a first radiating section and a first parasitic section located on the side of the first radiating section away from the left frame, the first radiating section comprising a first grounding end, a first feeding point and a first free end, the first grounding end is grounded, the first feeding point is electrically connected to the first feed source, the first parasitic section comprises a second grounding end and a second free end, the second grounding end is grounded, a first coupling gap is formed between the second free end and the first free end, a first resonance mode supporting a first medium and high frequency band is generated from the first grounding end to the first free end under the excitation of the first feed source, a second resonance mode supporting a second medium and high frequency band is generated from the second grounding end to the second free end under the excitation of the first feed source, and a center frequency point of the second medium and high frequency band is greater than the center frequency point of the first medium and high frequency band; and The second antenna unit includes a second antenna radiator and a second feed source arranged on the circuit board, the second antenna radiator includes a second radiating section and a third radiating section that are connected in a bent manner, the second radiating section is arranged on the bottom frame and is located on the side of the first parasitic section away from the first radiating section, the third radiating section is arranged on the right side frame, the second radiating section or the third radiating section includes a second feeding point, the second feeding point is electrically connected to the second feed source, and the second antenna radiator generates a third resonant mode supporting a target low-frequency band under the excitation of the second feed source.

2. The electronic device according to claim 1, characterized in that: The first parasitic section also includes a first tuning point, which is arranged between the second free end and the midpoint of the first parasitic section. The first antenna unit also includes a first tuning circuit arranged on the circuit board, the first tuning circuit is electrically connected to the first tuning point, and the first tuning circuit is used to tune the center frequency of the second medium and high frequency band.

3. The electronic device according to claim 1, characterized in that: The length of the first radiation segment is at least 2 mm longer than that of the first parasitic segment, the first resonance mode is a 1 / 4 wavelength mode corresponding to the first medium and high frequency band, and the second resonance mode is a 1 / 4 wavelength mode corresponding to the second medium and high frequency band.

4. The electronic device according to claim 1, characterized in that: The first mid-high frequency band and the second mid-high frequency band cover 1.6 GHz to 2.9 GHz.

5. The electronic device according to claim 1, characterized in that: The first grounding end is arranged at one end of the bottom frame connected to the left frame, the first feeding point is arranged between the first free end and the midpoint of the first radiation section, and the first parasitic section is provided with a USB interface.

6. The electronic device according to any one of claims 1 to 5, characterized in that: One end of the second radiation section away from the third radiation section forms a third free end, and one end of the third radiation section away from the second radiation section forms a fourth free end. Under the excitation of the second feed source, the third free end to the fourth free end generates the third resonance mode and the fourth resonance mode supporting the third medium and high frequency band.

7. The electronic device according to claim 6, characterized in that: The third resonant mode includes a 1 / 4 wavelength mode formed by a first resonant current generated between the second feeding point and the third free end, and a 1 / 4 wavelength mode formed by a second resonant current generated between the second feeding point and the fourth free end, and the flow direction of the second resonant current is opposite to the flow direction of the first resonant current; the fourth resonant mode includes a 1 / 2 wavelength mode formed by a third resonant current generated between the third free end and the fourth free end.

8. The electronic device according to claim 6, characterized in that: The second radiation section or the third radiation section also includes a second tuning point, the second tuning point is located in the electric field strength area of ​​the third resonance mode, and the second antenna unit also includes a second tuning circuit arranged on the circuit board, the second tuning circuit is electrically connected to the second tuning point, and is used to tune the center frequency of the target low-frequency band.

9. The electronic device according to claim 8, characterized in that: The second tuning circuit includes a switching switch and a plurality of sub-tuning circuits, one end of the switching switch is electrically connected to the second tuning point, and the other end of the switching switch performs electrical connection switching in the plurality of sub-tuning circuits, and the second tuning circuit is used to switch the target low-frequency band.

10. The electronic device according to claim 8, characterized in that: The second feeding point is arranged at the third radiation section, and the second tuning point is arranged between the midpoint of the second radiation section and the third free end.

11. The electronic device according to claim 6, characterized in that: A gap is formed between the third free end and the second ground end.

12. The electronic device according to claim 6, characterized in that: The second antenna radiator also includes a second parasitic section, which is arranged on the right side frame and located on the side of the third radiating section away from the second radiating section. One end of the second parasitic section forms a fifth free end, and the other end of the second parasitic section forms a third grounding end. A second coupling gap is formed between the fifth free end and the fourth free end, and the third grounding end is grounded. The second parasitic section generates a fifth resonant mode supporting a fourth medium and high frequency band under the excitation of the second feed source.

13. The electronic device according to any one of claims 1 to 5, characterized in that: The electronic device also includes a battery and an electro-acoustic component. The battery is accommodated in the accommodating space. A sub-accommodating space is formed between the battery, the left side frame, the bottom frame and the right side frame. The circuit board is accommodated in the sub-accommodating space. The electro-acoustic component is arranged on a side of the circuit board away from the right side frame.

14. The electronic device according to any one of claims 1 to 5, characterized in that: The circuit board includes a first edge, a second edge, a third edge and a fourth edge which are connected end to end in sequence, the top frame, the first edge, the third edge and the bottom frame are arranged in sequence along the length direction of the electronic device, the left frame, the second edge, the fourth edge and the right frame are arranged in sequence along the width direction of the electronic device, the projection point of the second edge on the bottom frame is located on the side of the first feeding point away from the right frame, the first feed source is arranged at the second edge, the second feed source is arranged at the third edge when the second feeding point is arranged at the second radiation section, and the second feed source is arranged at the fourth edge when the second feeding point is arranged at the third radiation section.

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