Electronic device

Abstract

The invention provides electronic equipment. The electronic equipment comprises a reference floor and a first antenna unit, the reference floor comprises a first side edge, a second side edge, a third side edge and a fourth side edge which are sequentially connected end to end, and the first side edge is provided with a first area, a second area and a third area which are sequentially arranged. The first antenna unit comprises a first antenna radiator and a first excitation source, the first antenna radiator is arranged on the first side edge and provided with a first feeding point, the orthographic projection of the first feeding point on the first side edge is located in a second area, the length of the first antenna radiator is smaller than or equal to 1 / 10 wavelength of a low-frequency band, and the first excitation source is arranged on the first side edge; the first excitation source is electrically connected with the first feeding point and used for exciting the reference floor to generate a first current mode, and the first current mode forms a current weak area in the first area and the third area and forms a current strong area in the second area. The length of the antenna radiator of the electronic equipment provided by the invention is relatively short, so that miniaturization is facilitated.

Description

Technical Field

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

[0002] In the related art, the radiator of the antenna unit is relatively long, especially for the antenna unit supporting low frequency, the radiator of which is about 50 mm long. A relatively long radiator is not conducive to the structural design of the electronic device. Summary of the invention

[0003] The present application provides an electronic device with a shorter antenna radiator.

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

[0005] A reference floor comprises a first side, a second side, a third side and a fourth side which are sequentially connected end to end, wherein the first side has a first area, a second area and a third area which are sequentially arranged; and

[0006] A first antenna unit includes a first antenna radiator and a first excitation source, wherein the first antenna radiator is arranged on the first side, the first antenna radiator has a first feeding point, the positive projection of the first feeding point on the first side is located in the second area, the length of the first antenna radiator is less than or equal to 1 / 10 wavelength of the working frequency band of the first antenna unit, the first excitation source is electrically connected to the first feeding point, and the first excitation source is used to excite the reference floor to generate a first current mode, the first current mode forms a current weak area in the first area and the third area, and forms a current strong area in the second area.

[0007] The length of the first antenna radiator of the first antenna unit in the electronic device provided by the present application is less than or equal to 1 / 10 wavelength of the working frequency band of the first antenna unit. For the first antenna unit used to support the low frequency band, the length of the first antenna radiator can be basically less than 35 mm. Compared with the radiator with a length of 50 mm in the related art, the length of the first antenna radiator is significantly reduced, which is conducive to miniaturization. The first antenna radiator is arranged on the first side, and the positive projection of the first feeding point on the first side is located in the second area, so that the first antenna radiator can be arranged in the middle area of ​​the first side, and the position design of the first antenna radiator is more flexible, and the first excitation source is used to excite the reference floor to generate a first current mode. The first current mode forms a weak current area in the first area and the third area, and forms a strong current area in the second area, that is, the first current mode conforms to the longitudinal characteristic mode or the transverse characteristic mode, so that the reference floor can fully participate in the radiation, ensuring that after the length of the first antenna radiator is reduced, the electronic device still has a high radiation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] 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.

[0009] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0010] Figure 2 for Figure 1 The electronic device shown includes a structural schematic diagram of a reference floor and a first antenna unit;

[0011] Figure 3 for Figure 1 Another structural schematic diagram of the electronic device shown includes a reference floor and a first antenna unit;

[0012] Figure 4 for Figure 1 A schematic diagram of current distribution in a longitudinal characteristic mode generated by the electronic device shown;

[0013] Figure 5 for Figure 1 The electronic device shown produces a radiation pattern of a longitudinal characteristic mode;

[0014] Figure 6 for Figure 1 A schematic diagram of current distribution in a lateral characteristic mode generated by the electronic device shown;

[0015] Figure 7 for Figure 1 The electronic device shown produces a radiation pattern with a lateral characteristic mode;

[0016] Figure 8 for Figure 2 A schematic structural diagram of a first antenna radiator of a first antenna unit of the electronic device forming an inductive coupling with a reference ground;

[0017] Fig. 9 for Figure 8 A schematic structural diagram of the electronic device shown in which one end of the first antenna radiator forms a first grounding end, and the other end of the first antenna radiator forms a first free end;

[0018] Fig.10 for Fig. 9 A schematic diagram of current distribution of the electronic device shown;

[0019] Fig.11 for Fig. 9 Return loss graph of the electronic device shown;

[0020] Fig.12 for Fig. 9 Efficiency graph of the electronic device shown;

[0021] Fig.13 for Fig. 9 the radiation pattern of the electronic device shown;

[0022] Fig.14 for Figure 8 A schematic structural diagram of a first antenna radiator of the electronic device shown includes a first radiating section and a second radiating section arranged at intervals;

[0023] Fig.15 for Fig.14 A schematic diagram of current distribution of the electronic device shown;

[0024] Fig.16 for Fig.14 the radiation pattern of the electronic device shown;

[0025] Fig.17 for Figure 2 A schematic structural diagram of a first antenna radiator of a first antenna unit of the electronic device forming capacitive coupling with a reference floor;

[0026] Fig.18 for Fig.17 A schematic structural diagram of the electronic device shown in which one end of the first antenna radiator forms the fourth free end, and the other end of the first antenna radiator forms the fifth free end;

[0027] Fig.19 for Figure 2 A schematic structural diagram showing that the second area of ​​the first side of the electronic device is located between the first position point and the second position point;

[0028] Fig. 20 for Figure 3 A schematic diagram of a structure in which the second area of ​​the first side of the electronic device is located between the third position point and the fourth position point;

[0029] Fig.21 A schematic diagram of the structure of another electronic device provided in an embodiment of the present application;

[0030] Fig. 22 for Fig.21 The electronic device shown includes a structural schematic diagram of a reference floor, a first antenna unit, and a second antenna unit;

[0031] Fig.23 for Fig.21 Another structural schematic diagram of the electronic device shown includes a reference floor, a first antenna unit, and a second antenna unit;

[0032] Fig.24 for Fig. 22 A schematic structural diagram of a second antenna radiator of a second antenna unit of the electronic device shown includes a third radiating section and a fourth radiating section arranged at intervals;

[0033] Fig.25 for Fig.23 A schematic structural diagram of a second antenna radiator of a second antenna unit of the electronic device shown includes a third radiating section and a fourth radiating section arranged at intervals;

[0034] Fig.26 for Fig.24 A schematic diagram of current distribution of the electronic device shown;

[0035] Fig. 27 for Fig.24 Return loss graph of the electronic device shown;

[0036] Fig.28 for Fig.24 Efficiency graph of the electronic device shown;

[0037] Fig.29 for Fig.24 the radiation pattern of the electronic device shown;

[0038] Fig.30 for Fig.25 A schematic diagram of current distribution of the electronic device shown;

[0039] Fig.31 for Fig.25 Return loss graph of the electronic device shown;

[0040] Fig.32 for Fig.25 Efficiency graph of the electronic device shown;

[0041] Fig.33 for Fig.25 the radiation pattern of the electronic device shown;

[0042] Fig.34 for Fig. 22 A schematic structural diagram of a second antenna unit of an electronic device in which one end of the second antenna radiator forms an eighth free end, and the other end of the second antenna radiator forms a ninth free end;

[0043] Fig.35 for Fig.23 A schematic structural diagram of a second antenna unit of an electronic device in which one end of the second antenna radiator forms an eighth free end, and the other end of the second antenna radiator forms a ninth free end;

[0044] Fig.36 for Fig.34 A schematic diagram of current distribution of the electronic device shown;

[0045] Fig.37 for Fig.34 Return loss graph of the electronic device shown;

[0046] Fig.38 for Fig.34 Efficiency graph of the electronic device shown;

[0047] Fig.39 for Fig.34 the radiation pattern of the electronic device shown;

[0048] Fig.40 for Fig.35 A schematic diagram of current distribution of the electronic device shown;

[0049] Fig.41 for Fig.35 Return loss graph of the electronic device shown;

[0050] Fig.42 for Fig.35 Efficiency graph of the electronic device shown;

[0051] Fig.43 for Fig.35 the radiation pattern of the electronic device shown;

[0052] Fig.44 for Fig.25 The radiation efficiency curve of the electronic device shown is in a hand-held scenario;

[0053] Fig.45 for Fig.35 The radiation efficiency curve of the electronic device shown is in a hand-held scenario.

[0054] Description of reference numerals:

[0055] Electronic device 100; reference floor 30; first antenna unit 10; first side 301; second side 302; third side 303; fourth side 304; first area 310; second area 311; third area 312; first antenna radiator 101; first excitation source 102; first feeding point 110; first grounding end 111; first free end 112; first slot 103; first radiation section 113; second radiation section 114; second grounding end 1130; second free end 1131; third grounding end 1140; third free end 1141; second slot 104; first Four free ends 115; fifth free end 116; first position point 3110; second position point 3111; third position point 3112; fourth position point 3113; fourth area 330; fifth area 331; sixth area 332; second antenna unit 20; second antenna radiator 201; second excitation source 202; second feeding point 210; third radiation section 211; fourth radiation section 212; fourth grounding end 2110; sixth free end 2111; fifth grounding end 2120; seventh free end 2121; third slot 105; eighth free end 213; ninth free end 214. DETAILED DESCRIPTION

[0056] 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.

[0057] References to "embodiments" and "implementations" in this application mean that the specific features, structures, or characteristics described in conjunction with the embodiments or implementations may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0058] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order; the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. In addition, the terms "end" and "point" in the specification and claims of this application and the above-mentioned drawings may indicate a small section of the antenna radiator relative to the antenna radiator as a whole, that is, "end" cannot be narrowly understood as an end, and "point" cannot be narrowly understood as a point. "Grounded end" can be understood as a grounded end. "Free end" can be understood as an end that is not electrically connected to a conductive part or has an isolation gap between it and the conductive part.

[0059] like Figure 1 As shown, Figure 1 The following is a schematic diagram of the structure of an electronic device 100 provided in an embodiment of the present application. The electronic device 100 may be a mobile phone, a tablet computer, a watch, or other device with communication functions. The present application embodiment takes a mobile phone as an example. Figure 1 The coordinate system shown. Among them, the X-axis direction can be understood as the width direction of the electronic device 100, the Y-axis direction can be understood as the length direction of the electronic device 100, and the Z-axis direction can be understood as the thickness direction of the electronic device 100. The width dimension of the electronic device 100 is smaller than the length dimension of the electronic device 100. The electronic device 100 includes a reference floor 30 and a first antenna unit 10. Of course, the electronic device 100 may also include a circuit board, a battery, a display screen, a camera module, etc.

[0060] The reference floor 30 refers to a portion of the electronic device 100 that is not affected by any grounding configuration and is considered to be a conductive earth. The potential of the reference floor 30 is agreed to be zero. For example, the reference floor 30 may include a grounding layer of a main circuit board, a grounding layer of a secondary circuit board, a metal part of a middle frame, and a conductive part electrically connected to one or more of the grounding layer of the main circuit board, the grounding layer of the secondary circuit board, and the metal part of the middle frame.

[0061] Please refer to Figure 2 and Figure 3 , the reference floor 30 includes a first side 301, a second side 302, a third side 303 and a fourth side 304 connected end to end in sequence. It can be understood that the first side 301 is arranged opposite to the third side 303, and the second side 302 is arranged opposite to the fourth side 304. The first side 301 has a first area 310, a second area 311 and a third area 312 arranged in sequence. It can be understood that the first area 310 and the third area 312 are edge areas of the first side 301, and the second area 311 is the middle area of ​​the first side 301. The present application does not specifically limit the size distribution of the first area 310, the second area 311 and the third area 312. For example: the first area 310, the second area 311, and the third area 312 can respectively occupy 1 / 3 of the first side 301; or, the first area 310 can occupy 1 / 4 of the first side 301, the second area 311 can occupy 1 / 2 of the first side 301, and the third area 312 can occupy 1 / 4 of the first side 301; or, the first area 310 can occupy 2 / 5 of the first side 301, the second area 311 can occupy 1 / 5 of the first side 301, and the third area 312 can occupy 2 / 5 of the first side 301, etc.

[0062] In a possible implementation, Figure 2 As shown, the first side 301 and the third side 303 may correspond to the long side of the electronic device 100, and the second side 302 and the fourth side 304 may correspond to the short side of the electronic device 100, that is, the first side 301 and the third side 303 extend along the length direction of the electronic device 100, and the second side 302 and the fourth side 304 extend along the width direction of the electronic device 100. In this embodiment, the length of the first side 301 and the length of the third side 303 are relatively long, and the length of the second side 302 and the length of the fourth side 304 are relatively short. The first area 310, the second area 311 and the third area 312 are arranged in sequence along the length direction of the electronic device 100.

[0063] In another possible implementation, Figure 3As shown, the first side 301 and the third side 303 may correspond to the short side of the electronic device 100, and the second side 302 and the fourth side 304 may correspond to the long side of the electronic device 100, that is, the first side 301 and the third side 303 extend along the width direction of the electronic device 100, and the second side 302 and the fourth side 304 extend along the length direction of the electronic device 100. In this embodiment, the length of the first side 301 and the length of the third side 303 are relatively short, and the length of the second side 302 and the length of the fourth side 304 are relatively long. The first area 310, the second area 311 and the third area 312 are arranged in sequence along the width direction of the electronic device 100.

[0064] The first antenna unit 10 includes a first antenna radiator 101 and a first excitation source 102. The first antenna radiator 101 is an element in the first antenna unit 10 for receiving and / or transmitting electromagnetic waves. The first antenna radiator 101 may include a conductor with a specific shape and size. In a possible implementation, the first antenna radiator 101 may be a frame antenna radiator, that is, when the frame of the electronic device 100 is made of a conductive material such as metal or alloy, part of the frame of the electronic device 100 may be reused to form the first antenna radiator 101. In another possible implementation, the first antenna radiator 101 may be a built-in antenna radiator, that is, when the frame of the electronic device 100 is made of an insulating material such as plastic or glass, the first antenna radiator 101 may be disposed between the frame of the electronic device 100 and the reference floor 30. In this implementation, the material of the first antenna radiator 101 may be metal, alloy, etc. The first antenna radiator 101 can be one of a flexible printed circuit (FPC) antenna radiator, a laser direct structuring (LDS) antenna radiator, a direct printing (PDS) antenna radiator, etc. The first excitation source 102 can be understood as a port of the first antenna unit 10 on the circuit board for electrically connecting the RF chip disposed on the circuit board. The first excitation source 102 obtains the excitation signal generated by the RF chip.

[0065] Please refer to Figure 2 and Figure 3, the first antenna radiator 101 is arranged on the first side 301. In the present application, the first antenna radiator 101 is arranged on the first side 301, which means that the first antenna radiator 101 is arranged on the side of the first side 301 away from the third side 303, or the first antenna radiator 101 is arranged on the side of the first side 301 facing the display screen of the electronic device 100, or the first antenna radiator 101 is arranged on the side of the first side 301 away from the display screen of the electronic device 100. In the embodiment of the present application, the first antenna radiator 101 is arranged on the side of the first side 301 away from the third side 303 as an example. The first antenna radiator 101 has a first feeding point 110. The first feeding point 110 can be understood as the position where the excitation signal flows into the first antenna radiator 101. The orthographic projection of the first feeding point 110 on the first side 301 is located in the second area 311. It can be understood that the first feeding point 110 is arranged corresponding to the second area 311. In a possible implementation manner, the first feeding point 110 may be located at the midpoint of the first side 301. In another possible implementation manner, the distance between the first feeding point 110 and the midpoint of the first side 301 may be less than or equal to 20 mm.

[0066] The length of the first antenna radiator 101 is less than or equal to 1 / 10 wavelength of the working frequency band of the first antenna unit 10. When the first side 301 corresponds to the long side of the electronic device 100, the first antenna radiator 101 is arranged at the long side of the electronic device 100, and the length of the first antenna radiator 101 is the size of the first antenna radiator 101 along the length direction of the electronic device 100; when the first side 301 corresponds to the short side of the electronic device 100, the first antenna radiator 101 is arranged at the short side of the electronic device 100, and the length of the first antenna radiator 101 is the size of the first antenna radiator 101 along the width direction of the electronic device 100.

[0067] In a possible implementation, the operating frequency band of the first antenna unit 10 includes a low frequency band. The low frequency band includes any frequency band less than 1 GHz. For example, the operating frequency band of the first antenna unit 10 may be 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), the B28 band (0.7 GHz to 0.8 GHz), etc. The length of the first antenna radiator 101 may be less than or equal to 1 / 10 wavelength of the minimum frequency of the operating frequency band of the first antenna unit 10. Since the length of the low frequency antenna radiator is generally longer than the length of the medium and high frequency antenna radiator and the length of the ultra-high frequency antenna radiator, it will occupy a larger space in the electronic device 100. Therefore, by reducing the length of the first antenna radiator 101 of the first antenna unit 10 used to support the low frequency band in the electronic device 100, it is beneficial to the structural design of the electronic device 100 when the number of antenna units is large.

[0068] The wavelength of the working frequency band of the first antenna unit 10 can be calculated by c / f, where c can be selected as 3*10 8 , f is the frequency. Taking the B5 frequency band of the first antenna unit 10 as an example, the length of the first antenna radiator 101 may be less than or equal to 36.6 mm. Taking the B8 frequency band of the first antenna unit 10 as an example, the length of the first antenna radiator 101 may be less than or equal to 36.6 mm. Taking the B8 frequency band of the first antenna unit 10 as an example, the length of the first antenna radiator 101 may be less than or equal to 36.6 mm. Taking the B8 frequency band of the first antenna unit 10 as an example, the length of the first antenna radiator 101 may be less than or equal to 34 mm. Taking the B20 frequency band of the first antenna unit 10 as an example, the length of the first antenna radiator 101 may be less than or equal to 34.8 mm. Taking the B28 frequency band of the first antenna unit 10 as an example, the length of the first antenna radiator 101 may be less than or equal to 42.9 mm. Taking the working frequency band of the first antenna unit 10 as 1 GHz as an example, the length of the first antenna radiator 101 may be less than or equal to 30 mm.

[0069] The first excitation source 102 is electrically connected to the first feeding point 110. Optionally, the first excitation source 102 is directly electrically connected to the first feeding point 110, or the first excitation source 102 is electrically connected to the first feeding point 110 through an electrical connection such as a feed line or a metal spring. The first excitation source 102 is used to excite the reference floor 30 to generate a first current mode. Among them, the first excitation source 102 indirectly excites the reference floor 30. It can be understood that the first excitation source 102 excites the first antenna radiator 101 to generate a corresponding resonant mode, and the coupling effect between the first antenna radiator 101 and the reference floor 30 causes the reference floor 30 to generate a first current mode. The first current mode forms a current weak zone in the first area 310 and the third area 312, and forms a current strong zone in the second area 311. The current distribution of the first current mode conforms to the current distribution of the 1 / 2 wavelength mode.

[0070] The first current mode may be substantially consistent with the longitudinal characteristic mode, or substantially consistent with the transverse characteristic mode. Figure 4 and Figure 5 , Figure 4 A schematic diagram of current distribution for generating a longitudinal characteristic mode for the electronic device 100, Figure 5 A radiation pattern with a longitudinal characteristic mode is generated for the electronic device 100. Figure 4 It can be seen from the figure that when the electronic device 100 generates a longitudinal characteristic mode, the current is mainly distributed along the length direction of the electronic device 100. Along the length direction of the electronic device 100, the current of the electronic device 100 is distributed in a weak-strong-weak manner. Figure 5 It can be seen from FIG. 1 that the radiation zero point of the longitudinal characteristic mode generated by the electronic device 100 is located in the length direction of the electronic device 100. Figure 6 and Figure 7 , Figure 6 A schematic diagram of current distribution for generating a lateral characteristic mode for the electronic device 100, Figure 7 A radiation pattern with a lateral characteristic mode is generated for the electronic device 100. Figure 6 It can be seen from the figure that when the electronic device 100 generates a transverse characteristic mode, the current is mainly distributed along the width direction of the electronic device 100. Along the width direction of the electronic device 100, the current of the electronic device 100 is weak-strong-weak distribution. Figure 7 It can be seen from the figure that the radiation zero point of the lateral characteristic mode generated by the electronic device 100 is located in the width direction of the electronic device 100.

[0071] It can be understood that when the first side 301 corresponds to the long side of the electronic device 100, the first antenna radiator 101 is arranged on the long side of the electronic device 100, the first feeding point 110 is arranged in the middle area of ​​the long side of the electronic device 100, and the first current mode generated by the first excitation source 102 exciting the reference floor 30 can basically conform to the longitudinal characteristic mode, that is, the current of the reference floor 30 is mainly distributed along the length direction of the electronic device 100, and the current of the reference floor 30 is weak-strong-weak distribution along the length direction of the electronic device 100. When the first side 301 corresponds to the long side of the electronic device 100, the first antenna radiator 101 is arranged on the long side of the electronic device 100, the first feeding point 110 is arranged in the middle area of ​​the long side of the electronic device 100, and the first current mode generated by the first excitation source 102 exciting the reference floor 30 can also basically conform to the transverse characteristic mode, that is, the current of the reference floor 30 is mainly distributed along the width direction of the electronic device 100, and the current of the reference floor 30 is weak-strong-weak distribution along the width direction of the electronic device 100.

[0072] When the first side 301 corresponds to the short side of the electronic device 100, the first antenna radiator 101 is arranged at the short side of the electronic device 100, the first feeding point 110 is arranged at the middle area of ​​the short side of the electronic device 100, and the first current mode generated by the first excitation source 102 exciting the reference floor 30 can basically conform to the longitudinal characteristic mode, that is, the current of the reference floor 30 is mainly distributed along the length direction of the electronic device 100, and the current of the reference floor 30 is weak-strong-weak distribution along the length direction of the electronic device 100. When the first side 301 corresponds to the short side of the electronic device 100, the first antenna radiator 101 is arranged at the short side of the electronic device 100, the first feeding point 110 is arranged at the middle area of ​​the short side of the electronic device 100, and the first current mode generated by the first excitation source 102 exciting the reference floor 30 can also basically conform to the transverse characteristic mode, that is, the current of the reference floor 30 is mainly distributed along the width direction of the electronic device 100, and the current of the reference floor 30 is weak-strong-weak distribution along the width direction of the electronic device 100.

[0073] The length of the first antenna radiator 101 of the first antenna unit 10 in the electronic device 100 provided in the present application is less than or equal to 1 / 10 wavelength of the working frequency band of the first antenna unit 10. For the first antenna unit 10 for supporting the low frequency band, the length of the first antenna radiator 101 can basically be less than 35 mm. Compared with the radiator with a length of 50 mm in the related art, the length of the first antenna radiator 101 is significantly reduced, which is conducive to miniaturization. The first antenna radiator 101 is arranged on the first side 301, and the orthographic projection of the first feeding point 110 on the first side 301 is located in the second area 311, so that the first antenna radiator 101 can be arranged in the middle area of ​​the first side 301, and the position design of the first antenna radiator 101 is more flexible, and the first excitation source 102 is used to excite the reference floor 30 to generate a first current mode. The first current mode forms a weak current area in the first area 310 and the third area 312, and forms a strong current area in the second area 311, that is, the first current mode conforms to the longitudinal characteristic mode or the transverse characteristic mode, so that the reference floor 30 can fully participate in the radiation, ensuring that after the length of the first antenna radiator 101 is reduced, the electronic device 100 still has a high radiation efficiency.

[0074] Optional, such as Figure 8As shown, the first antenna radiator 101 and the reference floor 30 form inductive coupling under the excitation of the first excitation source 102. The current of the first current mode is distributed along the extension direction of the first side 301. The current direction of the first current mode can be referred to as shown in I of the accompanying drawings. It can be understood that when the first antenna radiator 101 and the reference floor 30 form inductive coupling under the excitation of the first excitation source 102, if the first side 301 extends along the length direction of the electronic device 100, at this time, the first antenna radiator 101 is arranged on the long side of the electronic device 100, and the first feeding point 110 is arranged in the middle area corresponding to the long side of the electronic device 100, and the current excited by the first excitation source 102 on the reference floor 30 is mainly distributed along the length direction of the electronic device 100. When the first antenna radiator 101 and the reference floor 30 form inductive coupling under the excitation of the first excitation source 102, if the first side 301 extends along the width direction of the electronic device 100, the first antenna radiator 101 is arranged at the short side of the electronic device 100, and the first feeding point 110 is arranged in the middle area of ​​the short side of the electronic device 100, and the current excited by the first excitation source 102 on the reference floor 30 is mainly distributed along the width direction of the electronic device 100. The inductive coupling between the first antenna radiator 101 and the reference floor 30 can be understood as the magnetic field coupling between the first antenna radiator 101 and the reference floor 30, that is, the current change of the first antenna radiator 101 causes the current change of the reference floor 30; or, the inductive coupling between the first antenna radiator 101 and the reference floor 30 can also be understood as the first antenna radiator 101 and the reference floor 30 are connected by inductance in the equivalent circuit of the first antenna unit 10.

[0075] Specifically, a slot is formed between the first antenna radiator 101 and the reference floor 30. The first antenna radiator 101 includes at least one ground terminal. The ground terminal is electrically connected to the reference floor 30. The ground terminal can be understood as an end of the first antenna radiator 101 that is directly or indirectly electrically connected to the reference floor 30. The resonant current generated by the first antenna radiator 101 under the excitation of the first excitation source 102 flows to the reference floor 30 through the ground terminal. By forming a slot between the first antenna radiator 101 and the reference floor 30, the first antenna radiator 101 includes at least one ground terminal, and the ground terminal is electrically connected to the reference floor 30, so that a corresponding magnetic current can be generated in the slot between the first antenna radiator 101 and the reference floor 30, so that inductive coupling is formed between the first antenna radiator 101 and the reference floor 30.

[0076] In a possible embodiment, Fig. 9As shown, one end of the first antenna radiator 101 forms a first grounding end 111, and the other end of the first antenna radiator 101 forms a first free end 112. The first grounding end 111 is electrically connected to the reference floor 30, and the first free end 112 is spaced apart from the reference floor 30. In this embodiment, a first slot 103 is formed between the first grounding end 111, the first free end 112 and the reference floor 30, and a notch of the first slot 103 is formed between the first free end 112 and the reference floor 30. The first grounding end 111 and the reference floor 30 may be directly electrically connected, or may be indirectly electrically connected through an electrical connector such as a wire or a metal spring. The spacing distance between the first free end 112 and the reference floor 30 may be 1 mm to 3 mm. It is understandable that the width of the first slot 103 formed between the first antenna radiator 101 and the reference floor 30 may be 1 mm to 3 mm. The length of the first antenna radiator 101 is the distance from the first grounding end 111 to the first free end 112.

[0077] The first feeding point 110 may be disposed at the first free end 112. By disposing the first feeding point 110 at the first free end 112, the equivalent electrical length of the first antenna radiator 101 may be increased, thereby improving the radiation efficiency of the first antenna radiator 101.

[0078] Of course, in other embodiments, the first feeding point 110 may also be disposed between the first free end 112 and the first grounding end 111. In this embodiment, the distance between the first feeding point 110 and the first free end 112 may be smaller than the distance between the first feeding point 110 and the first grounding end 111.

[0079] Among them, the length of the first antenna radiator 101 is less than or equal to 1 / 16 wavelength of the working frequency band of the first antenna unit 10. It can be understood that the distance from the first ground end 111 to the first free end 112 can be less than or equal to 1 / 16 wavelength of the working frequency band of the first antenna unit 10. For example: the length of the first antenna radiator 101 can be less than or equal to 25mm. In a possible implementation, the length of the first antenna radiator 101 can be 20mm, and the distance between the first free end 112 and the reference floor 30 can be 2mm.

[0080] By forming a first grounding terminal 111 at one end of the first antenna radiator 101, forming a first free end 112 at the other end of the first antenna radiator 101, the first grounding terminal 111 is electrically connected to the reference floor 30, and the first free end 112 is spaced apart from the reference floor 30, the resonant current generated by the first antenna radiator 101 under the excitation of the first excitation source 102 can flow to the reference floor 30 through the first grounding terminal 111, and a corresponding magnetic current is generated in the first slot 103 between the first antenna radiator 101 and the reference floor 30, so as to realize inductive coupling between the first antenna radiator 101 and the reference floor 30 under the excitation of the first excitation source 102. In addition, it is also beneficial to reuse the frame of the electronic device 100 to form the first antenna radiator 101 when the material of the frame of the electronic device 100 is a conductive material such as metal or alloy, and to realize the formation of the first free end 112 at the other end of the first antenna radiator 101 by setting a gap in the frame of the electronic device 100.

[0081] like Fig.10 As shown, Fig.10 for Fig. 9 The current distribution diagram of the electronic device 100 is shown. Fig.10 It can be seen that when the first antenna radiator 101 and the reference floor 30 form inductive coupling under the excitation of the first excitation source 102, the first current mode generated by the reference floor 30 under the excitation of the first excitation source 102 basically conforms to the longitudinal characteristic mode. The current of the reference floor 30 is distributed along the length direction of the electronic device 100. The current of the reference floor 30 is weak-strong-weak distribution in the first area 310, the second area 311 and the third area 312.

[0082] Please refer to Fig.11 and Fig.12 , Fig.11 for Fig. 9 The return loss curve of the electronic device 100 is shown in FIG. Fig.12 for Fig. 9 The efficiency curve of the electronic device 100 is shown. Fig.11 It can be seen Fig. 9 The electronic device 100 shown can support a frequency band of 0.8 GHz to 1.6 GHz. Fig.12 The middle curve a is Fig. 9 The radiation efficiency curve of the electronic device 100 is shown. Fig.12 The middle curve b is Fig. 9 The overall efficiency curve of the electronic device 100 is shown. Fig.12 It can be seen from the curve a that Fig. 9 The radiation efficiency of the electronic device 100 in the working frequency band is greater than -1dB. Fig.12 It can be seen from curve b that Fig. 9The overall efficiency of the electronic device 100 in the operating frequency band is greater than -10 dB.

[0083] like Fig.13 As shown, Fig.13 for Fig. 9 The radiation pattern of the electronic device 100 is shown. Fig.13 It can be seen that the radiation coverage of the electronic device 100 is relatively wide, and the radiation zero point of the electronic device 100 is located in the length direction of the electronic device 100, which conforms to the longitudinal characteristic mode.

[0084] In another possible embodiment, Fig.14 As shown, the first antenna radiator 101 includes a first radiating section 113 and a second radiating section 114 which are spaced apart. An end of the first radiating section 113 away from the second radiating section 114 forms a second grounding end 1130, and an end of the first radiating section 113 close to the second radiating section 114 forms a second free end 1131. The second grounding end 1130 is electrically connected to the reference floor 30, and the second free end 1131 is spaced apart from the reference floor 30. An end of the second radiating section 114 away from the first radiating section 113 forms a third grounding end 1140, and an end of the second radiating section 114 close to the first radiating section 113 forms a third free end 1141, the third grounding end 1140 is electrically connected to the reference floor 30, and the third free end 1141 is spaced apart from the reference floor 30.

[0085] In this embodiment, a second slot 104 is formed between the second grounding terminal 1130, the second free end 1131, the third free end 1141, the third grounding terminal 1140 and the reference floor 30, and a notch of the second slot 104 is formed between the second free end 1131 and the third free end 1141. The second grounding terminal 1130 and the reference floor 30 can be directly electrically connected, or indirectly electrically connected through an electrical connector such as a wire or a metal spring. The spacing distance between the second free end 1131 and the reference floor 30 can be 1mm to 3mm. It can be understood that the width of the first sub-slot formed between the first radiation section 113 and the reference floor 30 can be 1mm to 3mm. The third grounding terminal 1140 and the reference floor 30 can be directly electrically connected, or indirectly electrically connected through an electrical connector such as a wire or a metal spring. The spacing distance between the third free end 1141 and the reference floor 30 can be 1mm to 3mm. It is understandable that the width of the second sub-groove formed between the second radiating section 114 and the reference floor 30 may be 1 mm to 3 mm. The width of the first sub-groove formed between the first radiating section 113 and the reference floor 30 and the width of the second sub-groove formed between the second radiating section 114 and the reference floor 30 may be the same. The length of the first antenna radiator 101 is the distance from the second ground terminal 1130 to the third ground terminal 1140.

[0086] The first feeding point 110 can be arranged between the second free end 1131 and the third free end 1141. It can be understood that the first feeding point 110 can be located in the gap between the second free end 1131 and the third free end 1141. Inductive coupling and / or capacitive coupling can be formed between the first feeding point 110 and the second free end 1131. Inductive coupling and / or capacitive coupling can be formed between the first feeding point 110 and the third free end 1141. By arranging the first feeding point 110 between the second free end 1131 and the third free end 1141, it is beneficial for the first feeding point 110 to couple with the second free end 1131 and the third free end 1141, so as to facilitate the first radiation section 113 and the second radiation section 114 to generate a resonant current under the excitation of the first excitation source 102. In this embodiment, the direction of the resonant current generated by the first radiation section 113 is the same as the direction of the resonant current generated by the second radiation section 114.

[0087] Among them, the length of the first antenna radiator 101 is less than or equal to 1 / 16 wavelength of the operating frequency band of the first antenna unit 10. It can be understood that the distance from the second ground terminal 1130 to the third ground terminal 1140 can be less than or equal to 1 / 16 wavelength of the operating frequency band of the first antenna unit 10. For example: the length of the first antenna radiator 101 can be less than or equal to 25mm. In a possible implementation, the length of the first antenna radiator 101 can be 20mm, and the distance between the second free end 1131 and the reference floor 30, and the distance between the third free end 1141 and the reference floor 30 can be 2mm.

[0088] By making the first antenna radiator 101 include a first radiating section 113 and a second radiating section 114 that are spaced apart, the end of the first radiating section 113 away from the second radiating section 114 forms a second grounding terminal 1130, and the end of the second radiating section 114 away from the first radiating section 113 forms a third grounding terminal 1140, and the second grounding terminal 1130 and the third grounding terminal 1140 are electrically connected to the reference floor 30, the resonant current generated by the first antenna radiator 101 under the excitation of the first excitation source 102 can flow to the reference floor 30 through the second grounding terminal 1130 and the third grounding terminal 1140 respectively, and a corresponding magnetic current is generated in the second slot 104 between the first antenna radiator 101 and the reference floor 30, so as to realize inductive coupling between the first antenna radiator 101 and the reference floor 30 under the excitation of the first excitation source 102.

[0089] like Fig.15 As shown, Fig.15 for Fig.14 The current distribution diagram of the electronic device 100 is shown. Fig.15It can be seen that when the first antenna radiator 101 and the reference floor 30 form inductive coupling under the excitation of the first excitation source 102, the first current mode generated by the reference floor 30 under the excitation of the first excitation source 102 basically conforms to the longitudinal characteristic mode. The current of the reference floor 30 is distributed along the length direction of the electronic device 100. The current of the reference floor 30 is weak-strong-weak distribution in the first area 310, the second area 311 and the third area 312.

[0090] like Fig.16 As shown, Fig.16 for Fig.14 The radiation pattern of the electronic device 100 is shown. Fig.16 It can be seen from the figure that the radiation zero point of the electronic device 100 is located in the length direction of the electronic device 100, which is consistent with the longitudinal characteristic mode.

[0091] Optional, such as Fig.17 As shown, the first antenna radiator 101 and the reference floor 30 form capacitive coupling under the excitation of the first excitation source 102. The current of the first current mode is distributed along the extension direction of the second side 302. It can be understood that when the first antenna radiator 101 and the reference floor 30 form capacitive coupling under the excitation of the first excitation source 102, if the first side 301 extends along the length direction of the electronic device 100, the first antenna radiator 101 is arranged on the long side of the electronic device 100, and the first feeding point 110 is arranged in the middle area corresponding to the long side of the electronic device 100, and the current excited by the first excitation source 102 on the reference floor 30 is mainly distributed along the width direction of the electronic device 100. When capacitive coupling is formed between the first antenna radiator 101 and the reference floor 30, if the first side 301 extends along the width direction of the electronic device 100, the first antenna radiator 101 is arranged on the short side of the electronic device 100, the first feeding point 110 is arranged in the middle area of ​​the short side of the electronic device 100, and the current excited by the first excitation source 102 on the reference floor 30 is mainly distributed along the length direction of the electronic device 100. The capacitive coupling formed between the first antenna radiator 101 and the reference floor 30 can be understood as the electric field coupling formed between the first antenna radiator 101 and the reference floor 30, that is, the voltage change of the first antenna radiator 101 causes the voltage change of the reference floor 30; or, the capacitive coupling formed between the first antenna radiator 101 and the reference floor 30 can also be understood as the first antenna radiator 101 and the reference floor 30 are connected by a capacitor in the equivalent circuit of the first antenna unit 10.

[0092] like Fig.18As shown, one end of the first antenna radiator 101 forms a fourth free end 115, and the other end of the first antenna radiator 101 forms a fifth free end 116. The fourth free end 115 is spaced apart from the reference floor 30, and the fifth free end 116 is spaced apart from the reference floor 30. Among them, the spacing distance between the fourth free end 115 and the reference floor 30, and the spacing distance between the fifth free end 116 and the reference floor 30 need to ensure that capacitive coupling can be formed between the first antenna radiator 101 and the reference floor 30. For example: the spacing distance between the fourth free end 115 and the reference floor 30 can be less than or equal to 3mm, and the spacing distance between the fifth free end 116 and the reference floor 30 can be less than or equal to 3mm. In this embodiment, the length of the first antenna radiator 101 is the distance from the fourth free end 115 to the fifth free end 116. The first feeding point 110 is arranged between the fourth free end 115 and the fifth free end 116. In this embodiment, under the excitation of the first excitation source 102, the direction of the resonant current generated by the first antenna radiator 101 between the first feeding point 110 and the fourth free end 115 is opposite to the direction of the resonant current generated by the first antenna radiator 101 between the first feeding point 110 and the fifth free end 116.

[0093] The length of the first antenna radiator 101 is less than or equal to 1 / 32 wavelength of the operating frequency band of the first antenna unit 10. It is understandable that the distance from the fourth free end 115 to the fifth free end 116 can be less than or equal to 1 / 32 wavelength of the operating frequency band of the first antenna unit 10. For example: the length of the first antenna radiator 101 can be less than or equal to 15 mm. In a possible implementation, the length of the first antenna radiator 101 can be 10 mm, and the width of the first antenna radiator 101 can be 1 mm.

[0094] By forming a fourth free end 115 at one end of the first antenna radiator 101 and a fifth free end 116 at the other end of the first antenna radiator 101, the fourth free end 115 is spaced apart from the reference floor 30, the fifth free end 116 is spaced apart from the reference floor 30, and the first feeding point 110 is arranged between the fourth free end 115 and the fifth free end 116, capacitive coupling can be formed between the first antenna radiator 101 and the fourth free end 115 and the reference floor 30, and capacitive coupling can be formed between the first antenna radiator 101 and the fifth free end 116 and the reference floor 30 under the excitation of the first excitation source 102.

[0095] In a possible embodiment, Fig.19As shown, the first side 301 is the long side of the reference floor 30. The second area 311 is the area between the first position point 3110 and the second position point 3111 of the first side 301, and the second side 302, the first position point 3110, the second position point 3111 and the fourth side 304 are arranged in sequence. It can be understood that the second side 302, the first position point 3110, the second position point 3111 and the fourth side 304 are arranged in sequence along the length direction of the electronic device 100. The distance between the first position point 3110 and the second side 302 is greater than or equal to 1 / 8 of the wavelength of the working frequency band of the first antenna unit 10, and the distance between the second position point 3111 and the fourth side 304 is greater than or equal to 1 / 8 of the wavelength of the working frequency band of the first antenna unit 10.

[0096] When the first side 301 is the long side of the reference floor 30, the length of the first side 301 is approximately equal to the length of the electronic device 100. For electronic devices 100 such as mobile phones, the length of the electronic device 100 is approximately 160 mm. For the first antenna unit 10 that supports the low-frequency band, the 1 / 8 wavelength of the working frequency band of the first antenna unit 10 is approximately 40 mm. At this time, the length of the second area 311 is close to 80 mm, and the proportion of the second area 311 exceeds 1 / 3 of the first side 301. While realizing the weak-strong-weak current distribution of the reference floor 30, it can ensure that the first antenna radiator 101 and the first feeding point 110 have high design flexibility.

[0097] In another possible embodiment, Fig. 20 As shown, the first side 301 is the short side of the reference floor 30. The second area 311 is the area between the third position point 3112 and the fourth position point 3113 of the first side 301, and the second side 302, the third position point 3112, the fourth position point 3113 and the fourth side 304 are arranged in sequence. It can be understood that the second side 302, the third position point 3112, the fourth position point 3113 and the fourth side 304 are arranged in sequence along the width direction of the electronic device 100. The distance between the third position point 3112 and the second side 302 is greater than or equal to 1 / 16 of the wavelength of the working frequency band of the first antenna unit 10, and the distance between the fourth position point 3113 and the fourth side 304 is greater than or equal to 1 / 16 of the wavelength of the working frequency band of the first antenna unit 10.

[0098] When the first side 301 is the short side of the reference floor 30, the length of the first side 301 is approximately equal to the width of the electronic device 100. For electronic devices 100 such as mobile phones, the width of the electronic device 100 is approximately 70 mm. For the first antenna unit 10 that supports the low-frequency band, the 1 / 16 wavelength of the working frequency band of the first antenna unit 10 is approximately 20 mm. At this time, the length of the second area 311 is close to 30 mm, and the proportion of the second area 311 exceeds 1 / 3 of the first side 301. While realizing the weak-strong-weak current distribution of the reference floor 30, the design of the first antenna radiator 101 and the first feeding point 110 can be guaranteed to have high flexibility.

[0099] For further information, please refer to Figure 21 to Figure 23 , the third side 303 has a fourth area 330, a fifth area 331 and a sixth area 332 arranged in sequence. It can be understood that the fourth area 330 and the sixth area 332 are edge areas of the third side 303, and the fifth area 331 is a middle area of ​​the third side 303. The description of the fourth area 330 in this application can refer to the first area 310 in the above embodiment, the description of the sixth area 332 can refer to the third area 312 in the above embodiment, and the description of the fifth area 331 can refer to the second area 311 in the above embodiment.

[0100] The electronic device 100 further includes a second antenna unit 20. The operating frequency band of the second antenna unit 20 includes a low frequency band. The structure of the second antenna unit 20 may be the same as that of the first antenna unit 10. Specifically, the second antenna unit 20 includes a second antenna radiator 201 and a second excitation source 202. The second antenna radiator 201 is a component in the second antenna unit 20 for receiving and / or transmitting electromagnetic waves. The second antenna radiator 201 may include a conductor with a specific shape and size. In a possible implementation, the second antenna radiator 201 may be a frame antenna radiator, that is, when the material of the frame of the electronic device 100 is a conductive material such as metal or alloy, part of the frame of the electronic device 100 may be reused to form the second antenna radiator 201. In another possible implementation, the second antenna radiator 201 may be a built-in antenna radiator, that is, when the material of the frame of the electronic device 100 is an insulating material such as plastic or glass, the second antenna radiator 201 may be disposed between the frame of the electronic device 100 and the reference floor 30. In this implementation, the material of the second antenna radiator 201 may be metal, alloy, etc. The second antenna radiator 201 can be one of an FPC antenna radiator, an LDS antenna radiator, a PDS antenna radiator, etc. The second excitation source 202 can be understood as a port of the second antenna unit 20 on the circuit board for electrically connecting the RF chip disposed on the circuit board. The second excitation source 202 obtains an excitation signal generated by the RF chip.

[0101] The second antenna radiator 201 is disposed on the third side 303. In the present application, the second antenna radiator 201 being disposed on the third side 303 may be disposed on the side of the third side 303 away from the first side 301, or the second antenna radiator 201 may be disposed on the side of the third side 303 facing the display screen of the electronic device 100, or the second antenna radiator 201 may be disposed on the side of the third side 303 away from the display screen of the electronic device 100. In a possible embodiment, the second antenna radiator 201 may be disposed on the third side 303 in the same manner as the first antenna radiator 101 is disposed on the first side 301. In other words, the second antenna radiator 201 and the first antenna radiator 101 may be symmetrically disposed about the central axis of the electronic device 100. The second antenna radiator 201 has a second feeding point 210. The second feeding point 210 may be understood as the position where the excitation signal flows into the second antenna radiator 201. The orthographic projection of the second feeding point 210 on the third side 303 is located in the fifth area 331. It can be understood that the second feeding point 210 is arranged corresponding to the fifth area 331.

[0102] The length of the second antenna radiator 201 is less than or equal to 1 / 10 wavelength of the working frequency band of the second antenna unit 20. When the third side 303 corresponds to the long side of the electronic device 100, the second antenna radiator 201 is arranged at the long side of the electronic device 100, and the length of the second antenna radiator 201 is the size of the second antenna radiator 201 along the length direction of the electronic device 100; when the third side 303 corresponds to the short side of the electronic device 100, the second antenna radiator 201 is arranged at the short side of the electronic device 100, and the length of the second antenna radiator 201 is the size of the second antenna radiator 201 along the width direction of the electronic device 100. In a possible implementation, the length of the second antenna radiator 201 may be the same as the length of the first antenna radiator 101.

[0103] The second excitation source 202 is electrically connected to the second feeding point 210. Optionally, the second excitation source 202 is directly electrically connected to the second feeding point 210, or the second excitation source 202 is electrically connected to the second feeding point 210 through an electrical connection such as a feeder line or a metal spring. The second excitation source 202 is used to excite the reference floor 30 to generate a second current mode. Among them, the second excitation source 202 can indirectly excite the reference floor 30. It can be understood that the second excitation source 202 excites the second antenna radiator 201 to generate a corresponding resonant mode, and the coupling effect between the second antenna radiator 201 and the reference floor 30 causes the reference floor 30 to generate a second current mode. The second current mode forms a current weak zone in the fourth region 330 and the sixth region 332, and forms a current strong zone in the fifth region 331. The current distribution of the second current mode conforms to the current distribution of the 1 / 2 wavelength mode. Among them, the second current mode can basically conform to the longitudinal characteristic mode, and can also basically conform to the transverse characteristic mode.

[0104] In a possible embodiment, the operating frequency band of the second antenna unit 20 is the same as the operating frequency band of the first antenna unit 10 , and the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase.

[0105] Optional, see Fig.24 and Fig.25The first antenna radiator 101 includes a first radiating section 113 and a second radiating section 114 which are spaced apart. The end of the first radiating section 113 away from the second radiating section 114 forms a second grounding end 1130, and the end of the first radiating section 113 close to the second radiating section 114 forms a second free end 1131. The second grounding end 1130 is electrically connected to the reference floor 30, and the second free end 1131 is spaced apart from the reference floor 30. The end of the second radiating section 114 away from the first radiating section 113 forms a third grounding end 1140, and the end of the second radiating section 114 close to the first radiating section 113 forms a third free end 1141, the third grounding end 1140 is electrically connected to the reference floor 30, and the third free end 1141 is spaced apart from the reference floor 30. The second antenna radiator 201 includes a third radiating section 211 and a fourth radiating section 212 which are spaced apart. The end of the third radiation section 211 away from the fourth radiation section 212 forms a fourth grounding end 2110, and the end of the first radiation section 113 close to the second radiation section 114 forms a sixth free end 2111. The third grounding end 1140 is electrically connected to the reference floor 30, and the sixth free end 2111 is spaced apart from the reference floor 30. The end of the fourth radiation section 212 away from the third radiation section 211 forms a fifth grounding end 2120, and the end of the fourth radiation section 212 close to the third radiation section 211 forms a seventh free end 2121, the fifth grounding end 2120 is electrically connected to the reference floor 30, and the seventh free end 2121 is spaced apart from the reference floor 30. The second feeding point 210 is arranged between the second free end 1131 and the third free end 1141.

[0106] Similarly, a third slot 105 is formed between the fourth grounding end 2110, the sixth free end 2111, the seventh free end 2121, the fifth grounding end 2120 and the reference floor 30 of the second antenna radiator 201 of this embodiment, and a notch of the third slot 105 is formed between the sixth free end 2111 and the seventh free end 2121. The direction of the resonant current generated by the third radiation section 211 is the same as the direction of the resonant current generated by the fourth radiation section 212. The second antenna radiator 201 and the reference floor 30 form an inductive coupling under the excitation of the second excitation source 202.

[0107] like Fig.26 As shown, Fig.26 for Fig.24 The current distribution diagram of the electronic device 100 is shown. Fig.26It can be seen that when the first antenna radiator 101 is arranged in the middle area of ​​one long side of the electronic device 100, and the second antenna radiator 201 is arranged in the middle area of ​​another long side of the electronic device 100, the first antenna radiator 101 and the reference floor 30 form inductive coupling under the excitation of the first excitation source 102, and the second antenna radiator 201 and the reference floor 30 form inductive coupling under the second excitation source 202, and the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, the current mode generated by the reference floor 30 under the excitation of the first excitation source 102 and the second excitation source 202 basically conforms to the longitudinal characteristic mode. Among them, the current of the reference floor 30 is distributed along the length direction of the electronic device 100. The current of the reference floor 30 is weak-strong-weak distribution along the first area 310, the second area 311 and the third area 312, and weak-strong-weak distribution in the fourth area 330, the fifth area 331 and the sixth area 332.

[0108] Please refer to Fig. 27 and Fig.28 , Fig. 27 for Fig.24 The return loss curve of the electronic device 100 is shown in FIG. Fig.28 for Fig.24 The efficiency curve of the electronic device 100 is shown. Fig. 27 It can be seen Fig.24 The electronic device 100 shown can support a frequency band of 0.7 GHz to 1 GHz. Fig.28 The middle curve c is Fig.24 The radiation efficiency curve of the electronic device 100 is shown. Fig.28 The middle curve d is Fig.24 The overall efficiency curve of the electronic device 100 is shown. Fig.28 It can be seen from the curve c that Fig.24 The radiation efficiency of the electronic device 100 in the working frequency band is greater than -5dB. Fig.28 It can be seen from the curve d that Fig.24 The overall efficiency of the electronic device 100 in the operating frequency band is greater than -10 dB.

[0109] like Fig.29 As shown, Fig.29 for Fig.24 The radiation pattern of the electronic device 100 is shown. Fig.29 It can be seen from the figure that the radiation pattern of the electronic device 100 is similar to the radiation pattern of the longitudinal characteristic mode, and the zero point distribution of the radiation pattern of the electronic device 100 is the same as the zero point distribution of the radiation pattern of the longitudinal characteristic mode, that is, it conforms to the longitudinal characteristic mode. In addition, since the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, Fig.24 The radiation pattern of the electronic device 100 shown has good symmetry.

[0110] like Fig.30 As shown, Fig.30 for Fig.25 The current distribution diagram of the electronic device 100 is shown. Fig.30 It can be seen that when the first antenna radiator 101 is arranged in the middle area of ​​one short side of the electronic device 100, and the second antenna radiator 201 is arranged in the middle area of ​​the other short side of the electronic device 100, the first antenna radiator 101 and the reference floor 30 form inductive coupling under the excitation of the first excitation source 102, and the second antenna radiator 201 and the reference floor 30 form inductive coupling under the second excitation source 202, and the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, the current mode generated by the reference floor 30 under the excitation of the first excitation source 102 and the second excitation source 202 basically conforms to the lateral characteristic mode. Among them, the current of the reference floor 30 is distributed along the width direction of the electronic device 100. The current of the reference floor 30 is weak-strong-weak distribution along the first area 310, the second area 311 and the third area 312, and weak-strong-weak distribution in the fourth area 330, the fifth area 331 and the sixth area 332.

[0111] Please refer to Fig.31 and Fig.32 , Fig.31 for Fig.25 The return loss curve of the electronic device 100 is shown in FIG. Fig.32 for Fig.25 The efficiency curve of the electronic device 100 is shown. Fig.31 It can be seen Fig.25 The electronic device 100 shown can support a frequency band of 0.7 GHz to 1 GHz. Fig.32 The middle curve e is Fig.25 The radiation efficiency curve of the electronic device 100 is shown. Fig.32 The middle curve f is Fig.25 The overall efficiency curve of the electronic device 100 is shown. Fig.32 It can be seen from the curve e that Fig.25 The radiation efficiency of the electronic device 100 in the working frequency band is greater than -5dB. Fig.32 It can be seen from the curve f that Fig.25 The overall efficiency of the electronic device 100 in the operating frequency band is greater than -20 dB.

[0112] like Fig.33 As shown, Fig.33 for Fig.25 The radiation pattern of the electronic device 100 is shown. Fig.33It can be seen from the figure that the radiation pattern of the electronic device 100 is similar to the radiation pattern of the transverse characteristic mode, and the zero point distribution of the radiation pattern of the electronic device 100 is the same as the zero point distribution of the radiation pattern of the transverse characteristic mode, that is, it conforms to the transverse characteristic mode. In addition, since the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, Fig.25 The radiation pattern of the electronic device 100 shown has good symmetry.

[0113] Optional, see Fig.34 and Fig.35 One end of the first antenna radiator 101 forms a fourth free end 115, and the other end of the first antenna radiator 101 forms a fifth free end 116. The fourth free end 115 is spaced apart from the reference floor 30, and the fifth free end 116 is spaced apart from the reference floor 30. The first feeding point 110 is disposed between the fourth free end 115 and the fifth free end 116. One end of the second antenna radiator 201 forms an eighth free end 213, and the other end of the first antenna radiator 101 forms a ninth free end 214. The eighth free end 213 is spaced apart from the reference floor 30, and the ninth free end 214 is spaced apart from the reference floor 30. The second feeding point 210 is disposed between the eighth free end 213 and the ninth free end 214.

[0114] Similarly, under the excitation of the second excitation source 202, the direction of the resonant current generated by the second antenna radiator 201 between the second feeding point 210 and the eighth free end 213 is opposite to the direction of the resonant current generated by the second antenna radiator 201 between the second feeding point 210 and the ninth free end 214. The second antenna radiator 201 and the reference floor 30 form capacitive coupling under the excitation of the second excitation source 202.

[0115] like Fig.36 As shown, Fig.36 for Fig.34 The current distribution diagram of the electronic device 100 is shown. Fig.36It can be seen that when the first antenna radiator 101 is arranged in the middle area of ​​one long side of the electronic device 100, and the second antenna radiator 201 is arranged in the middle area of ​​another long side of the electronic device 100, the first antenna radiator 101 forms capacitive coupling with the reference floor 30 under the excitation of the first excitation source 102, and the second antenna radiator 201 forms capacitive coupling with the reference floor 30 under the excitation of the second excitation source 202, and the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, the current mode generated by the reference floor 30 under the excitation of the first excitation source 102 and the second excitation source 202 basically conforms to the lateral characteristic mode. Among them, the current of the reference floor 30 is distributed along the width direction of the electronic device 100. The current of the reference floor 30 is weak-strong-weak distribution along the first area 310, the second area 311 and the third area 312, and weak-strong-weak distribution in the fourth area 330, the fifth area 331 and the sixth area 332.

[0116] Please refer to Fig.37 and Fig.38 , Fig.37 for Fig.34 The return loss curve of the electronic device 100 is shown in FIG. Fig.38 for Fig.34 The efficiency curve of the electronic device 100 is shown. Fig.37 It can be seen Fig.34 The electronic device 100 shown can support a frequency band of 0.8 GHz to 1 GHz. Fig.38 The middle curve g is Fig.34 The radiation efficiency curve of the electronic device 100 is shown. Fig.38 The middle curve h is Fig.34 The overall efficiency curve of the electronic device 100 is shown. Fig.38 It can be seen from the curve g that Fig.34 The radiation efficiency of the electronic device 100 in the working frequency band is greater than -5dB. Fig.38 It can be seen from the curve h that Fig.34 The overall efficiency of the electronic device 100 in the operating frequency band is greater than -20 dB.

[0117] like Fig.39 As shown, Fig.39 for Fig.34 The radiation pattern of the electronic device 100 is shown. Fig.39 It can be seen that the radiation pattern of the electronic device 100 is similar to the radiation pattern of the transverse characteristic mode, and the zero point distribution of the radiation pattern of the electronic device 100 is the same as the zero point distribution of the radiation pattern of the transverse characteristic mode, that is, it conforms to the transverse characteristic mode. In addition, since the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, Fig.34 The radiation pattern of the electronic device 100 shown has good symmetry.

[0118] like Fig.40 As shown, Fig.40 for Fig.35 The current distribution diagram of the electronic device 100 is shown. Fig.40 It can be seen that when the first antenna radiator 101 is arranged in the middle area of ​​one short side of the electronic device 100, and the second antenna radiator 201 is arranged in the middle area of ​​the other short side of the electronic device 100, the first antenna radiator 101 and the reference floor 30 form capacitive coupling under the excitation of the first excitation source 102, and the second antenna radiator 201 and the reference floor 30 form capacitive coupling under the excitation of the second excitation source 202, and the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, the current mode generated by the reference floor 30 under the excitation of the first excitation source 102 and the second excitation source 202 basically conforms to the longitudinal characteristic mode. Among them, the current of the reference floor 30 is distributed along the length direction of the electronic device 100. The current of the reference floor 30 is weak-strong-weak distribution along the first area 310, the second area 311 and the third area 312, and weak-strong-weak distribution in the fourth area 330, the fifth area 331 and the sixth area 332.

[0119] Please refer to Fig.41 and Fig.42 , Fig.41 for Fig.35 The return loss curve of the electronic device 100 is shown in FIG. Fig.42 for Fig.35 The efficiency curve of the electronic device 100 is shown. Fig.41 It can be seen Fig.35 The electronic device 100 shown can support a frequency band of 0.8 GHz to 1 GHz. Fig.42 The middle curve j is Fig.35 The radiation efficiency curve of the electronic device 100 is shown. Fig.42 The middle curve k is Fig.35 The overall efficiency curve of the electronic device 100 is shown. Fig.42 It can be seen from the curve j that Fig.35 The radiation efficiency of the electronic device 100 in the working frequency band is greater than -5dB. Fig.42 It can be seen from the curve k that Fig.35 The overall efficiency of the electronic device 100 in the operating frequency band is greater than -25 dB.

[0120] like Fig.43 As shown, Fig.43 for Fig.35 The radiation pattern of the electronic device 100 is shown. Fig.43It can be seen from the figure that the radiation pattern of the electronic device 100 of the embodiment of the present application is similar to the radiation pattern of the longitudinal characteristic mode, and the zero point distribution of the radiation pattern of the electronic device 100 is the same as the zero point distribution of the radiation pattern of the longitudinal characteristic mode, that is, it conforms to the longitudinal characteristic mode. In addition, since the second excitation source 202 and the first excitation source 102 are excited with equal amplitude and in phase, Fig.35 The radiation pattern of the electronic device 100 shown has good symmetry.

[0121] Please refer to Fig.44 and Fig.45 , Fig.44 for Fig.25 The radiation efficiency curve of the electronic device 100 when it is in a hand-held scenario is shown. Fig.45 for Fig.35 The radiation efficiency curve of the electronic device 100 is shown in FIG. Fig.25 The current pattern generated by the reference ground plane 30 of the electronic device 100 shown in the figure basically conforms to the lateral characteristic pattern, so in the hand-held scene Fig.25 The radiation efficiency of the electronic device 100 is improved, and the lower the frequency, the better the performance in the hand-held scene. Fig.25 The radiation efficiency of the electronic device 100 shown is improved more obviously. This is because Fig.25 The current generated by the reference floor 30 of the electronic device 100 is distributed along the width direction of the electronic device 100. The width of the electronic device 100 is about 1 / 4 wavelength of the low-frequency band. The electrical length is not enough for the low-frequency antenna radiator. The dielectric loading effect of the hand makes the equivalent electrical length of the reference floor 30 longer, which is more in line with the 1 / 2 wavelength of the low-frequency band, thereby improving the radiation efficiency of the electronic device 100. In this scenario, the dielectric loading effect of the hand is much greater than the absorption effect of the hand. Ultimately, the radiation efficiency of the electronic device 100 in the hand-held scenario will be higher than the radiation efficiency of the electronic device 100 in free space. Fig.35 For the electronic device 100 shown, due to Fig.35 The current pattern generated by the reference ground plane 30 of the electronic device 100 shown in the figure basically conforms to the longitudinal characteristic pattern, so in the hand-held scene Fig.35 The radiation efficiency of the electronic device 100 shown will be reduced. Fig.34 For the electronic device 100 shown, the radiation efficiency of the electronic device 100 in a hand-held scenario may be higher than the radiation efficiency of the electronic device 100 in free space. Fig.24 For the electronic device 100 shown, its radiation efficiency will be reduced when it is held in the hand.

[0122] 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 reference floor, the reference floor comprising a first side, a second side, a third side and a fourth side which are sequentially connected end to end, the first side having a first area, a second area and a third area which are sequentially arranged; and A first antenna unit, wherein the working frequency band of the first antenna unit includes a low frequency band, the first antenna unit includes a first antenna radiator and a first excitation source, the first antenna radiator is arranged on the first side, the first antenna radiator has a first feeding point, the positive projection of the first feeding point on the first side is located in the second area, the length of the first antenna radiator is less than or equal to 1 / 10 wavelength of the working frequency band of the first antenna unit, the first excitation source is electrically connected to the first feeding point, and the first excitation source is used to excite the reference floor to generate a first current mode, the first current mode forms a current weak area in the first area and the third area, and forms a current strong area in the second area.

2. The electronic device according to claim 1, characterized in that: The first antenna radiator and the reference ground plane form inductive coupling under the excitation of the first excitation source, and the current of the first current mode is distributed along the extension direction of the first side.

3. The electronic device according to claim 2, characterized in that: A slot is formed between the first antenna radiator and the reference floor. The first antenna radiator includes at least one grounding terminal, and the grounding terminal is electrically connected to the reference floor.

4. The electronic device according to claim 3, characterized in that: One end of the first antenna radiator forms a first grounding end, and the other end of the first antenna radiator forms a first free end. The first grounding end is electrically connected to the reference floor, and the first free end is spaced apart from the reference floor.

5. The electronic device according to claim 4, characterized in that: The first feeding point is arranged at the first free end.

6. The electronic device according to claim 3, characterized in that: The first antenna radiator includes a first radiating section and a second radiating section that are spaced apart, wherein an end of the first radiating section away from the second radiating section forms a second grounding end, an end of the first radiating section close to the second radiating section forms a second free end, the second grounding end is electrically connected to the reference floor, and the second free end is spaced apart from the reference floor, an end of the second radiating section away from the first radiating section forms a third grounding end, an end of the second radiating section close to the first radiating section forms a third free end, the third grounding end is electrically connected to the reference floor, and the third free end is spaced apart from the reference floor.

7. The electronic device according to claim 6, characterized in that: The first feeding point is arranged between the second free end and the third free end.

8. The electronic device according to claim 3, characterized in that: The length of the first antenna radiator is less than or equal to 1 / 16 wavelength of the working frequency band of the first antenna unit.

9. The electronic device according to claim 1, characterized in that: The first antenna radiator and the reference ground are capacitively coupled under the excitation of the first excitation source, and the current of the first current mode is distributed along the extension direction of the second side.

10. The electronic device according to claim 9, characterized in that: One end of the first antenna radiator forms a fourth free end, the other end of the first antenna radiator forms a fifth free end, the fourth free end is spaced apart from the reference floor, the fifth free end is spaced apart from the reference floor, and the first feeding point is located between the fourth free end and the fifth free end.

11. The electronic device according to claim 10, characterized in that: The length of the first antenna radiator is less than or equal to 1 / 32 wavelength of the working frequency band of the first antenna unit.

12. The electronic device according to any one of claims 1 to 11, characterized in that: The first side is the long side of the reference floor, the second area is the area between the first position point and the second position point of the first side, the second side, the first position point, the second position point and the fourth side are arranged in sequence, the distance between the first position point and the second side is greater than or equal to 1 / 8 wavelength of the working frequency band of the first antenna unit, and the distance between the second position point and the fourth side is greater than or equal to 1 / 8 wavelength of the working frequency band of the first antenna unit.

13. The electronic device according to any one of claims 1 to 11, characterized in that: The first side is the short side of the reference floor, the second area is the area between the third position point and the fourth position point of the first side, the second side, the third position point, the fourth position point and the fourth side are arranged in sequence, the distance between the third position point and the second side is greater than or equal to 1 / 16 wavelength of the working frequency band of the first antenna unit, and the distance between the fourth position point and the fourth side is greater than or equal to 1 / 16 wavelength of the working frequency band of the first antenna unit.

14. The electronic device according to any one of claims 1 to 11, characterized in that: The third side has a fourth area, a fifth area and a sixth area arranged in sequence, the electronic device also includes a second antenna unit, the working frequency band of the second antenna unit is a low frequency band, the second antenna unit includes a second antenna radiator and a second excitation source, the second antenna radiator is arranged on the third side, the second antenna radiator has a second feeding point, the positive projection of the second feeding point on the third side is located in the fifth area, the length of the second antenna radiator is less than or equal to 1 / 10 wavelength of the working frequency band of the second antenna unit, the second excitation source is electrically connected to the second feeding point, the second excitation source is used to excite the reference floor to generate a second current mode, the second current mode forms a current weak area in the fourth area and the sixth area, and a current strong area in the fifth area.

15. The electronic device according to claim 14, characterized in that: The operating frequency band of the second antenna unit is the same as the operating frequency band of the first antenna unit, and the second excitation source and the first excitation source are excited with equal amplitude and in phase.

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