CN116130939A

CN116130939A - Antenna and terminal equipment

Info

Publication number: CN116130939A
Application number: CN202310022647.3A
Authority: CN
Inventors: 王家明; 应李俊; 张小伟; 王吉康
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2023-05-16
Also published as: CN113451741B; CN113451741A

Abstract

The embodiment of the application provides an antenna and terminal equipment. The antenna comprises: a first radiator and a second radiator; wherein a gap is formed between the first radiator and the second radiator; the first radiator comprises a feed point and is arranged at one end of the first radiator, which is close to the gap; the first radiator comprises a first grounding point and is arranged at one end of the first radiator far away from the gap; the distance between the feed point and the first grounding point along the surface of the first radiator is greater than one quarter of the wavelength corresponding to the resonance point of the first resonance generated by the first radiator and less than one half of the wavelength corresponding to the resonance point of the first resonance. The antenna provided by the application can structurally reduce SAR in an unbalanced mode, and solves the problem that SAR is too high to be common when parasitic branches work.

Description

Antenna and terminal equipment

Technical Field

The present disclosure relates to the field of wireless communications, and in particular, to an antenna and a terminal device.

Background

The development of the information age requires higher and higher speed, and the demand for over the air technology (OTA) of antennas is growing, but the influence of regulations on products such as mobile phones and the like on people is increasingly emphasized, and the contradiction of the activation is that high-performance OTA is required, and the design of antennas is limited due to low radiation.

How to meet the legal and legal requirements of electromagnetic wave absorption ratio (specific absorption rate, SAR) and still maintain the OTA performance of the antenna, and also extend to a lot of solutions, with intelligent user scene distinguishing function, with multi-antenna assistance in order to sacrifice the antenna performance for the law, etc., and how to avoid the problem by considering the design of the antenna itself obviously becomes a very troublesome problem.

Disclosure of Invention

The embodiment of the application provides an antenna and terminal equipment, which can structurally reduce SAR in an unbalanced mode and solve the problem that the SAR is too high to be usual when parasitic branches work.

In a first aspect, an antenna is provided, which is applied to a terminal device, and includes: a first radiator and a second radiator; wherein a gap is formed between the first radiator and the second radiator; the first radiator comprises a feed point and is arranged at one end of the first radiator, which is close to the gap; the first radiator comprises a first grounding point and is arranged at one end of the first radiator far away from the gap; the distance between the feed point and the first grounding point along the surface of the first radiator is greater than one quarter of the wavelength corresponding to the resonance point of the first resonance generated by the first radiator and less than one half of the wavelength corresponding to the resonance point of the first resonance.

According to the technical scheme of the embodiment of the application, the distance between the feeding point and the first grounding point along the surface of the first radiator can be greater than one fourth of the wavelength corresponding to the resonance point of the first resonance and less than one half of the wavelength corresponding to the resonance point of the first resonance. In this case, the feeding point and the first grounding point have capacitance characteristics, and can be used for pulling an electric field generated by the second radiator to break up current distribution on the surface of the second radiator, so that SAR generated by the second radiator is reduced.

With reference to the first aspect, in certain implementations of the first aspect, a distance between the feeding point and the first ground point along the surface of the first radiator is less than one half of a wavelength corresponding to a resonance point of a second resonance generated by the second radiator.

According to the technical scheme of the embodiment of the application, the distance between the feeding point and the first grounding point along the surface of the first radiator can be greater than one fourth of the wavelength corresponding to the resonance point of the first resonance and less than one half of the wavelength corresponding to the resonance point of the second resonance. The structural design can enable the first radiator to better pull the electric field generated by the second radiator 120, so that the performance of the antenna is further improved.

With reference to the first aspect, in certain implementation manners of the first aspect, the antenna further includes: a third radiator; the third radiator is located on one side, far away from the first radiator, of the second radiator, and a gap is formed between the third radiator and the second radiator.

According to the technical scheme of the embodiment of the application, the third radiator can provide another electric field traction path for the first radiator or the second radiator while generating third resonance to expand the working bandwidth of the antenna, and current on the surface of the radiator can be further dispersed, so that SAR is reduced.

With reference to the first aspect, in certain implementations of the first aspect, a third resonance generated by the third radiator partially overlaps a first resonance generated by the first radiator.

With reference to the first aspect, in certain implementations of the first aspect, a third resonance generated by the third radiator partially overlaps a second resonance generated by the second radiator.

According to the technical scheme of the embodiment of the application, the third radiator is in the weak coupling area, when the third resonance generated by the third radiator is partially overlapped with the first resonance generated by the first radiator, an electric field generated by the first radiator can be pulled, the current on the surface of the first radiator is scattered, and the SAR corresponding to the electric field is reduced. When the third resonance generated by the third radiator partially overlaps with the second resonance generated by the second radiator, the electric field generated by the second radiator can be pulled, the current on the surface of the second radiator is dispersed, and the corresponding SAR is reduced. Can be adjusted according to design and production requirements to meet the requirements.

With reference to the first aspect, in certain implementation manners of the first aspect, the antenna further includes: a fourth radiator; the fourth radiator is located on one side, away from the second radiator, of the first radiator, and a gap is formed between the fourth radiator and the first radiator.

According to the technical scheme of the embodiment of the application, the fourth radiator can provide another electric field traction path for the first radiator or the second radiator while generating fourth resonance to expand the working bandwidth of the antenna, and current on the surface of the radiator can be further dispersed, so that SAR is reduced.

With reference to the first aspect, in certain implementations of the first aspect, a fourth resonance generated by the fourth radiator partially overlaps a first resonance generated by the first radiator.

With reference to the first aspect, in certain implementations of the first aspect, a fourth resonance generated by the fourth radiator partially overlaps a second resonance generated by the second radiator.

According to the technical scheme of the embodiment of the application, the fourth radiator is in the weak coupling area, when the fourth resonance generated by the fourth radiator is partially overlapped with the first resonance generated by the first radiator, an electric field generated by the first radiator can be pulled, the current on the surface of the first radiator is scattered, and the SAR corresponding to the electric field is reduced. When the fourth resonance generated by the fourth radiator partially overlaps the second resonance generated by the second radiator, the electric field generated by the second radiator can be pulled, the current on the surface of the second radiator is dispersed, and the corresponding SAR is reduced. Can be adjusted according to design and production requirements to meet the requirements.

With reference to the first aspect, in certain implementations of the first aspect, a first resonance generated by the first radiator partially overlaps a second resonance generated by the second radiator.

According to the technical solution of the embodiment of the present application, the second radiator 120 is located in the strong coupling region of the first radiator 110, and when the first resonance generated by the first radiator 110 and the second resonance generated by the second radiator 120 do not overlap, the effect of scattering the current distribution on the surface of the second radiator 120 can also be achieved.

With reference to the first aspect, in certain implementation manners of the first aspect, the first radiator and the second radiator are frames of the terminal device.

In a second aspect, a terminal device is provided, which may comprise any of the antennas of the first aspect described above.

In a third aspect, an antenna is provided, comprising: a first radiator and a second radiator; wherein a gap is formed between the first radiator and the second radiator; the first radiator comprises a feed point and is arranged at one end of the first radiator, which is close to the gap; the first radiator comprises a first grounding point and is arranged at one end of the first radiator far away from the gap; the distance between the feed point and the first grounding point along the surface of the first radiator is greater than one quarter of the wavelength corresponding to the resonance point of the first resonance generated by the first radiator and less than one half of the wavelength corresponding to the resonance point of the second resonance generated by the second radiator; the first radiator and the second radiator are frames of the terminal equipment.

Drawings

Fig. 1 is a schematic diagram of a terminal device provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of the structure of an antenna.

Fig. 3 is a schematic diagram of a structure of an antenna according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of another antenna according to an embodiment of the present application.

Fig. 5 is a schematic diagram of S-parameters of the antenna shown in fig. 2.

Fig. 6 is a schematic diagram of current distribution in a first radiator operation mode provided in the practice of the present application.

Fig. 7 is a schematic diagram of current distribution in a second radiator operation mode provided in the application.

Fig. 8 is a schematic structural diagram of an antenna grounding scheme according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of an antenna feeding scheme according to an embodiment of the present application.

Fig. 10 is a schematic diagram of a matching network according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of yet another antenna according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of yet another antenna according to an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The terminal equipment in the embodiment of the application can be a mobile phone, a tablet personal computer, a notebook computer, an intelligent bracelet, an intelligent watch, an intelligent helmet, intelligent glasses and the like. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a terminal device in a 5G network or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), etc., as the embodiments of the present application are not limited in this respect.

Fig. 1 is a schematic diagram of a terminal device 100 according to an embodiment of the present application, where the terminal device 100 is used as a mobile phone for illustration.

As shown in fig. 1, the terminal device 100 has a cubic-like shape and may include a frame 10 and a display 20, wherein the frame 10 and the display 20 may be mounted on a middle frame (not shown), the frame 10 may be divided into an upper frame, a lower frame, a left frame, and a right frame, the frames are connected to each other, and a certain arc or chamfer may be formed at the connection.

The terminal device 100 further includes a printed circuit board (printed circuit board, PCB) disposed therein, on which electronic components may be disposed, which may include, but are not limited to, capacitors, inductors, resistors, processors, cameras, flash lamps, microphones, batteries, etc.

The frame 10 may be a metal frame, such as copper, magnesium alloy, stainless steel, plastic frame, glass frame, ceramic frame, or a combination of metal and plastic frame.

In order to meet the legal requirements of SAR, an antenna structure formed by a terminal device using a metal frame generally adopts a structure as shown in fig. 2.

As shown in fig. 2, the antenna includes a feed stub 30 and a parasitic stub 40, wherein the parasitic stub 40 floats. The feed stub is provided with a feed point 31 at one end close to the parasitic stub 40, a ground point 33 at one end far from the parasitic stub 40, and a ground point 32 between the ground point 33 and the feed point 31. Typically, the feed branches operate in a quarter mode. At this time, the parasitic stub 40 is coupled to the feed by the feed stub 30, and resonance is generated. The structure is characterized in that the power reduction amplitude is smaller in the head-hand mode of the middle-high band (MHB) test, and meanwhile, the SAR is relatively good, so that the structure has advantages. Since the mode generated by the parasitic dendrite 40 is mainly a balanced mode, i.e., a half mode, the radiation performance is good. Therefore, in practical mode applications, the head-to-hand (beside head and hand, BHH) scenario is desirable to ensure the overall radiation performance of the antenna in the hand-held state by means of balanced mode.

But it is undesirable to bring into the high SAR half mode in SAR scenarios. Since the half mode of the parasitic branch 40 satisfies the boundary condition, its current is concentrated in the center region of the parasitic branch 40. Thus, when the parasitic dendrite 40 is operated in the half-mode, it tends to result in a high SAR, which is generally not satisfactory for regulation. If there is a limit in scene discrimination, the transmitting power of the antenna can only be forcibly reduced to meet the SAR regulation requirement. For example, when the parasitic dendrite works in the half mode of the high frequency band B7 (2620 MHz-2690 MHz), the SAR is high, and the requirement of regulation is not usually satisfied, and the parasitic dendrite can be solved only by forcibly reducing the power. At this time, the antenna performance is not ensured.

In addition, in the prior art, in order to reduce the high SAR introduced by the parasitic stub in the half-wavelength mode, a SAR reduction chip is typically accessed at one end of the parasitic stub. The parasitic branches are used as radiators and SAR-reducing inductors, and when the SAR-reducing inductors sense objects within a certain distance, the emission power of the SAR-reducing inductors is automatically reduced, so that the SAR value is reduced. However, the circuit structure is complex, and the layout difficulty in the terminal equipment is increased. At the same time, the performance of the antenna is correspondingly reduced due to the lower power.

In general, the restriction of the SAR limits the application of the half-wavelength mode, so that the SAR and the normal use scene need to be distinguished, meanwhile, the volume limitation of the terminal equipment has no way to apply too much for the application of the suspension branch, and the balance between the antenna performance OTA index and the SAR can be only removed.

The application provides an antenna structure, which can structurally reduce SAR in an unbalanced mode and solve the problem that the SAR is too high to be frequently generated when a parasitic branch works.

It will be appreciated that by varying the distance along the feed leg between the feed point of the feed leg and the ground point, the impedance characteristics of the feed point to ground may be varied. For example, as shown in fig. 2, a distance L2 between the feeding point 31 and the ground point 32 along the feeding branch 30 is compared with a quarter of a wavelength λ corresponding to a resonance point of resonance generated by the parasitic branch 40. In general, when L2 < 1/4λ, an inductance characteristic is exhibited between the feeding point 31 and the ground point 32. The distance L1 between the feed point 31 and the ground point 33 along the feed branch 30 is compared with a quarter of the wavelength λ corresponding to the resonance point of the resonance generated by the parasitic branch 40. In general, when 1/4λ < L2 < 3/4λ, an inductance characteristic is exhibited between the feeding point 31 and the ground point 33.

The difference between the two different antenna configurations is that the parasitic stub 40 is excited in a generally capacitive manner, especially at medium and high frequencies. The feeding branch 30 is excited by inductance and has little influence on the electric field of the excitation mode, but if the feeding branch 30 is excited by capacitance, additional field traction can be generated for the capacitance excitation of the parasitic branch 40, and the current of the parasitic branch 40 during operation is dispersed.

Fig. 3 is a schematic diagram of a structure of an antenna according to an embodiment of the present application, where the antenna is applied to a terminal device, and the terminal device may further include a feeding unit 130, where the feeding unit 130 may provide an electrical signal to the antenna in the terminal device.

As shown in fig. 3, the antenna may include a first radiator 110 and a second radiator 120.

Wherein a gap is formed between the first radiator 110 and the second radiator 120. The first radiator 110 includes a feeding point 131, and the feeding point 131 may be disposed at an end of the first radiator 110 near the slit. The first radiator 110 may further include a first ground point 140, and the first ground point 140 may be disposed at an end of the first radiator 110 remote from the slit.

It should be appreciated that the end of the first radiator 110 near or far from the slit may be the end distance of the first radiator 110 from the end point, not a point.

When the feeding unit 130 feeds at a feeding point, the first radiator 110 generates a first resonance. The distance between the feeding point 131 and the first ground point 140 along the surface of the first radiator 110 may be greater than one quarter of the wavelength corresponding to the resonance point of the first resonance and less than one half of the wavelength corresponding to the resonance point of the first resonance. In this case, the feeding point 131 and the first grounding point 140 may have a capacitive characteristic, and may be used to pull the electric field generated by the second radiator 120, break up the current distribution on the surface of the second radiator 120, and thus reduce the SAR of the second radiator 120.

Alternatively, when the first resonance generated by the first radiator 110 partially overlaps the second resonance generated by the second radiator 120, the effect of the electric field generated by the first radiator 110 pulling the second radiator 120 is better.

It should be appreciated that the second radiator 120 is in a strong coupling region of the first radiator 110, and may also function to break up the current distribution at the surface of the second radiator 120 when the first resonance generated by the first radiator 110 does not overlap with the second resonance generated by the second radiator 120.

Alternatively, the first radiator 110 may be a frame in a terminal device, and the second radiator 120 may be implemented by a laser-direct-structuring (LDS), a flexible circuit board (flexible printed circuit, FPC) printing, or a floating metal (FLM) process.

Alternatively, the second radiator 120 may be a bezel in the terminal device.

Alternatively, the first radiator 110 and the second radiator 120 may be frames in the terminal device, may be located in any two adjacent frames in the terminal device, or may be located in any one frame in the terminal device.

Alternatively, the second radiator 120 may be fed by the first radiator 110 as a parasitic stub through a slot coupling, thereby generating a second resonance.

It will be appreciated that the second resonance is generated by the first radiator 110 coupling feed, and therefore, to ensure good radiation performance of the antenna, the frequency of the resonance point of the second resonance is typically greater than the frequency of the resonance point of the first resonance. However, the resonant frequency of the second resonance is not limited in the present application, and may be designed accordingly according to practical situations.

Alternatively, the distance between the feeding point 131 and the first ground point 140 along the surface of the first radiator 110 may be greater than one quarter of the wavelength corresponding to the resonance point of the first resonance and less than one half of the wavelength corresponding to the resonance point of the second resonance. The structural design can enable the first radiator 110 to better pull the electric field generated by the second radiator 120, so that the performance of the antenna is further improved.

Alternatively, the second radiator 120 may include a second ground point 150, and the second ground point 150 may be disposed at an end of the second radiator 120 remote from the slit.

Optionally, the antenna may also include a first tuning device 160, as shown in fig. 4.

Alternatively, the first tuning device 160 may be disposed at the second ground point 150 of the second radiator 120, and may be connected in series or in parallel, for adjusting the operating frequency of the antenna. It is understood that the second resonance may refer to a resonance having the highest resonance frequency among the plurality of resonances generated by the second radiator 120.

Alternatively, the first tuning device 160 may be disposed at the feeding point 131 of the first radiator 110, may be connected in series, or may be connected in parallel, for adjusting the operating frequency of the antenna. It should be understood that the first resonance may refer to a resonance having a lowest resonance frequency among a plurality of resonances generated by the first radiator 110.

It should be understood that the present application is not limited to a particular form of second radiator, and that the second radiator may operate in a half mode, a quarter mode, or the like. As long as the compatibility between the feeding point of the first radiator and the first grounding point is ensured, the purpose that the first radiator pulls the electric field of the second radiator can be achieved, so that SAR is reduced.

Fig. 5 to 7 are diagrams of simulation results of antennas provided in embodiments of the present application. Fig. 5 is an S parameter of an antenna provided in an embodiment of the present application, fig. 6 is a current distribution of a first radiator operation mode provided in an embodiment of the present application, and fig. 7 is a current distribution of a second radiator operation mode provided in an embodiment of the present application.

As shown in fig. 5, the S parameters of the first resonance and the second resonance generated by the antenna can meet the requirement of the operating frequency band, and the covered frequency band can be adjusted according to the specific design or production requirement.

As shown in fig. 6, the current distribution is more dispersed than a conventional inverted-F antenna (IFA). At this time, the operation mode of the first radiator is between the quarter mode and the slit mode. When the simulation efficiency is-2 dBi, the bottom 5mm body test (5 mmbody-SAR) result corresponding to the traditional IFA is 2.129W/kg, and the test result corresponding to the first radiator in the antenna structure provided by the embodiment of the application is 1.566W/kg.

As shown in fig. 7, compared with the parasitic branches provided in the conventional IFA structure under the two different feeding forms, the antenna provided in the embodiment of the present application can actually find that the current of the second radiator is scattered due to the electric field traction of the first radiator, and there is an obvious shunt phenomenon at the side close to the gap, so that the overall SAR of the antenna is reduced. When the traditional parasitic branch works in the half mode, the simulation efficiency is-2 dBi, the test result of the whole antenna is 3.318W/kg, and the test result corresponding to the antenna structure provided by the embodiment of the application is 2.45W/kg.

The first grounding point 140 of the first radiator 110 may be electrically connected to the middle frame 50 of the terminal device through the first connection 501, and the second grounding point 150 of the second radiator 120 may be electrically connected to the middle frame 50 of the terminal device through the second connection 502.

Alternatively, the first radiator 110 and the second radiator 120 may be electrically connected to the middle frame 50 by integrally forming the middle frame of the terminal device and the radiator, or by welding, the first connecting member 501 and the second connecting member 502 are welding points, or the first connecting member 1501 and the second connecting member 1502 are metal elastic sheets, or the like.

Optionally, insulating material 60 may be filled between the first radiator 110, the second radiator 120 and the middle frame 50, where the insulating material 60 may be plastic, rubber, ceramic, etc., and the filled insulating material may improve the stability of the overall structure of the terminal device.

As shown in fig. 9, the feeding unit of the antenna may be disposed on the PCB70 of the terminal device, and electrically connected to the feeding point of the first radiator 110 through the spring 210.

It should be understood that the technical solution provided in the embodiments of the present application may also be applied to a grounding structure of an antenna, where the antenna is connected to a floor through a spring, and in a terminal device, the floor may be a middle frame or a metal layer in a PCB.

Alternatively, the second radiator may be grounded by adopting such a structure, wherein the second radiator may be disposed on the antenna support and electrically connected to the PCB70 through the spring 210, thereby realizing grounding.

It should be understood that the PCB is formed by laminating a plurality of dielectric plates, and a metal layer is present in the plurality of dielectric plates, which may serve as a floor for the antenna structure.

Alternatively, the feeding unit may be a power chip in the terminal device.

Optionally, the antenna may further comprise a matching network.

Fig. 10 is a schematic diagram of a matching network 200 according to an embodiment of the present application.

The matching network can match the characteristics of the electric signal and the radiator in the feed unit, so that the transmission loss and distortion of the electric signal are reduced to the minimum.

The matching network 200 may include, among other things, a first capacitance 2102, a first inductance 2103, and a second capacitance 2104. The first inductance 2103 is connected in series between the feeding unit 130 and the first radiator 110, the first capacitance 2102 is connected in parallel between the feeding unit 130 and the first inductance 2103, and the second capacitance 2104 is connected in parallel between the first inductance 2103 and the first radiator 110. The specific values of the first capacitance 2102, the first inductance 2103 and the second capacitance 2104 can be obtained according to a calculation simulation.

It should be understood that a matching network may be added between the feeding unit and the feeding point of the first radiator, and the embodiment of the present application only shows an exemplary matching network, and does not limit the specific form of the matching network.

Fig. 11 is a schematic diagram of another antenna structure according to an embodiment of the present application.

As shown in fig. 11, the antenna may further include a third radiator 210, which may be located at a side of the second radiator 120 remote from the first radiator 110, and the third radiator 210 may form a gap with the second radiator 120, and may be fed through the gap coupling to generate a third resonance.

Alternatively, the third radiator 210 may include a third ground point 220, and the third radiator 210 may be grounded at the third ground point 220.

Optionally, the antenna may further comprise a second tuning device 161, and the second tuning device 161 may be disposed at the third ground point 220 of the third radiator 210, may be connected in series, may be connected in parallel, and may be used to adjust the resonant frequency of the antenna.

It should be appreciated that the third radiator 210 may provide another electric field traction path for the first radiator 110 or the second radiator 120 while generating a third resonance to expand the operating bandwidth of the antenna, and may further break up the current on the radiator surface, thereby reducing SAR. When the third resonance generated by the third radiator 210 overlaps the first resonance generated by the first radiator 110, the third radiator 210 is in the weak coupling region, and can pull the electric field generated by the first radiator 110, break up the current on the surface of the first radiator, and reduce the SAR corresponding to the current. When the third resonance generated by the third radiator 210 partially overlaps the second resonance generated by the second radiator, the electric field generated by the second radiator 120 may be pulled, and the current on the surface of the second radiator may be dispersed, so as to reduce the SAR corresponding to the current. Can be adjusted according to design and production requirements to meet the requirements.

Fig. 12 is a schematic diagram of another antenna structure according to an embodiment of the present application.

As shown in fig. 12, the antenna may further include a fourth radiator 310, which may be located at a side of the first radiator 110 remote from the second radiator 120, and the fourth radiator 310 may form a gap with the first radiator 110, and may be fed through the gap coupling to generate a third resonance.

Alternatively, the fourth radiator 310 may include a fourth ground point 320, and the fourth radiator 310 may be grounded at the fourth ground point 320.

Optionally, the antenna may further include a third tuning device 161, where the third tuning device 161 may be disposed at the fourth ground point 320 of the fourth radiator 310, may be connected in series, may be connected in parallel, and may be used to adjust the resonant frequency of the antenna.

It should be appreciated that the fourth radiator 310 may provide another electric field traction path for the first radiator 110 or the second radiator 120 while generating a fourth resonance to expand the operating bandwidth of the antenna, and may further break up the current on the radiator surface, thereby reducing SAR. When the fourth resonance generated by the fourth radiator 310 overlaps the first resonance generated by the first radiator 110, the fourth radiator 310 is in the weak coupling region, and can pull the electric field generated by the first radiator 110, break up the current on the surface of the first radiator, and reduce the SAR corresponding to the current. When the fourth resonance generated by the fourth radiator 310 partially overlaps the second resonance generated by the second radiator, the electric field generated by the second radiator 120 may be pulled, and the current on the surface of the second radiator may be dispersed, so as to reduce the SAR corresponding to the current. Can be adjusted according to design and production requirements to meet the requirements.

Optionally, the fourth resonance generated by the fourth radiator 310 and the third resonance generated by the third radiator are resonance modes introduced by the same resonance.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, or may be in electrical or other forms.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An antenna, the antenna comprising:

a first radiator and a second radiator;

wherein a first gap is formed between the first radiator and the second radiator;

the first radiator comprises a feed point and is arranged at one end of the first radiator, which is close to the first gap;

the first radiator comprises a first grounding point and is arranged at one end of the first radiator, which is far away from the first gap;

the third radiator and the second radiator are not provided with feed points;

the third radiator is positioned on one side, far away from the first radiator, of the second radiator, and a second gap is formed between the third radiator and the second radiator; or the third radiator is positioned on one side of the first radiator away from the second radiator, and a second gap is formed between the third radiator and the first radiator.

2. The antenna of claim 1, wherein a distance along the first radiator surface between the feed point and the first ground point is greater than one quarter of a wavelength corresponding to a resonance point of a first resonance generated by the first radiator and less than one half of a wavelength corresponding to the resonance point of the first resonance.

3. An antenna according to claim 1 or 2, wherein the distance between the feed point and the first ground point along the surface of the first radiator is less than one half the wavelength corresponding to the resonance point of the second resonance generated by the second radiator.

4. An antenna according to any one of claims 1 to 3, wherein the second radiator comprises a second ground point, the second ground point being disposed at an end of the second radiator remote from the first slot.

5. The antenna of claim 4, wherein the antenna comprises:

and the first tuning device is arranged at the second grounding point of the second radiator and is used for adjusting the frequency of second resonance generated by the second radiator.

6. The antenna according to any one of claims 1 to 4, characterized in that the antenna comprises:

and the first tuning device is arranged at the feed point of the first radiator and is used for adjusting the frequency of the first resonance generated by the first radiator.

7. The antenna of any one of claims 1 to 6, wherein the first resonance generated by the first radiator is a resonance having a lowest resonance frequency among a plurality of resonances generated by the first radiator.

8. The antenna according to any one of claims 1 to 7, characterized in that,

the third radiator includes a third ground point at which the third radiator is grounded.

9. The antenna of claim 8, wherein the antenna further comprises:

and a second tuning device disposed at the third ground point of the third radiator for a frequency of a third resonance generated by the third radiator.

10. The antenna of any one of claims 1 to 9, wherein a third resonance generated by the third radiator partially overlaps a first resonance generated by the first radiator.

11. The antenna of any one of claims 1 to 9, wherein a third resonance generated by the third radiator partially overlaps a second resonance generated by the second radiator.

12. The antenna of any one of claims 1 to 11, wherein a first resonance generated by the first radiator partially overlaps a second resonance generated by the second radiator.

13. A terminal device, characterized in that it comprises an antenna according to any of the preceding claims 1-12.

14. The terminal device of claim 13, wherein the first radiator, the second radiator, and the third radiator of the antenna are each part of a bezel of the terminal device.