An antenna and terminal device

Abstract

The embodiment of the present application provides an antenna and a terminal device. 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, which is arranged at one end of the first radiator close to the gap; the first radiator comprises a first grounding point, which is arranged at one end of the first radiator 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 present application can reduce the SAR of the unbalanced mode from the structure, and solves the problem that the SAR is too high to be always on when the parasitic branch works.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and more particularly to an antenna and terminal device. Background Technology

[0002] The development of the information age demands ever-increasing speeds, and the demand for high-speed over-the-air (OTA) testing of antennas is also growing. However, regulations concerning mobile phones and other products, as well as their impact on people, are receiving increasing attention. This intensified contradiction, with the need for high-performance OTA on one hand and low radiation on the other, inherently limits the design of the antenna itself.

[0003] How to meet the legal and regulatory requirements for specific absorption rate (SAR) while maintaining the over-the-air (OTA) performance of the antenna has led to many solutions, including intelligent user scenario differentiation, sacrificing antenna performance for regulatory purposes, and using multiple antennas for assistance. However, how to avoid this problem through the design of the antenna itself has obviously become an extremely difficult issue. Summary of the Invention

[0004] This application provides an antenna and terminal device that can structurally reduce unbalanced SAR and solve the problem of excessively high SAR that cannot be maintained when parasitic branches are in operation.

[0005] In a first aspect, an antenna is provided for use in a terminal device, comprising: a first radiator and a second radiator; wherein a gap is formed between the first radiator and the second radiator; the first radiator includes a feed point disposed at one end of the first radiator near the gap; the first radiator includes a first ground point disposed at one end of the first radiator away from the gap; the distance along the surface of the first radiator between the feed point and the first ground point is greater than one-quarter of the wavelength corresponding to the resonant point of the first resonance generated by the first radiator, and less than one-half of the wavelength corresponding to the resonant point of the first resonance.

[0006] According to the technical solution of this application embodiment, the distance between the feed point and the first ground point along the surface of the first radiator can be greater than one-quarter of the wavelength corresponding to the resonant point of the first resonance, and less than one-half of the wavelength corresponding to the resonant point of the first resonance. In this case, the feed point and the first ground point exhibit capacitive characteristics, which can be used to pull the electric field generated by the second radiator, disperse the current distribution on the surface of the second radiator, thereby reducing the SAR generated by the second radiator.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the distance between the feed point and the first ground point along the surface of the first radiator is less than half the wavelength corresponding to the resonant point of the second resonance generated by the second radiator.

[0008] According to the technical solution of this application embodiment, the distance between the feed point and the first ground point along the surface of the first radiator can be greater than one-quarter of the wavelength corresponding to the resonant point of the first resonance and less than one-half of the wavelength corresponding to the resonant point of the second resonance. This structural design allows the first radiator to better pull the electric field generated by the second radiator 120, thereby further improving the performance of the antenna.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the antenna further includes: a third radiator; wherein the third radiator is located on the side of the second radiator away from the first radiator, and a gap is formed between the third radiator and the second radiator.

[0010] According to the technical solution of the embodiments of this application, while generating the third resonant extended antenna operating bandwidth, the third radiator can provide another electric field traction path for the first or second radiator, and can further disperse the current on the surface of the radiator, thereby reducing SAR.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the third resonance generated by the third radiator partially overlaps with the first resonance generated by the first radiator.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the third resonance generated by the third radiator partially overlaps with the second resonance generated by the second radiator.

[0013] According to the technical solution of this application embodiment, the third radiator is located in a weakly coupled region. When the third resonance generated by the third radiator partially overlaps with the first resonance generated by the first radiator, it can pull the electric field generated by the first radiator, breaking up the current on the surface of the first radiator and reducing its corresponding SAR. When the third resonance generated by the third radiator partially overlaps with the second resonance generated by the second radiator, it can pull the electric field generated by the second radiator, breaking up the current on the surface of the second radiator and reducing its corresponding SAR. Adjustments can be made according to design and production needs to meet requirements.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the antenna further includes: a fourth radiator; wherein the fourth radiator is located on the side of the first radiator away from the second radiator, and a gap is formed between the fourth radiator and the first radiator.

[0015] According to the technical solution of the embodiments of this application, while generating the fourth resonant extended antenna operating bandwidth, the fourth radiator can provide another electric field traction path for the first radiator or the second radiator, and can further disperse the current on the surface of the radiator, thereby reducing SAR.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the fourth resonance generated by the fourth radiator partially overlaps with the first resonance generated by the first radiator.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the fourth resonance generated by the fourth radiator partially overlaps with the second resonance generated by the second radiator.

[0018] According to the technical solution of this application embodiment, the fourth radiator is located in a weakly coupled region. When the fourth resonance generated by the fourth radiator partially overlaps with the first resonance generated by the first radiator, it can pull the electric field generated by the first radiator, breaking up the current on the surface of the first radiator and reducing its corresponding SAR. When the fourth resonance generated by the fourth radiator partially overlaps with the second resonance generated by the second radiator, it can pull the electric field generated by the second radiator, breaking up the current on the surface of the second radiator and reducing its corresponding SAR. Adjustments can be made according to design and production needs to meet requirements.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the first resonance generated by the first radiator partially overlaps with the second resonance generated by the second radiator.

[0020] According to the technical solution of the embodiment of this application, the second radiator 120 is located in the strong coupling region of the first radiator 110. When the first resonance generated by the first radiator 110 and the second resonance generated by the second radiator 120 do not overlap, it can also disperse the current distribution on the surface of the second radiator 120.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the first radiator and the second radiator are the frame of the terminal device.

[0022] In a second aspect, a terminal device is provided, which may include any of the antennas described in the first aspect above.

[0023] Thirdly, 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 includes a feed point disposed at one end of the first radiator near the gap; the first radiator includes a first ground point disposed at one end of the first radiator away from the gap; the distance along the surface of the first radiator between the feed point and the first ground point is greater than one-quarter of the wavelength corresponding to the resonant point of the first resonance generated by the first radiator, and less than one-half of the wavelength corresponding to the resonant point of the second resonance generated by the second radiator; the first radiator and the second radiator form the frame of the terminal device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the terminal device provided in the embodiments of this application.

[0025] Figure 2 This is a schematic diagram of an antenna structure.

[0026] Figure 3 This is a schematic diagram of the structure of an antenna provided in an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of another antenna structure provided in an embodiment of this application.

[0028] Figure 5 yes Figure 2 The diagram shows the S-parameters of the antenna.

[0029] Figure 6 This is a schematic diagram of the current distribution in the first radiator operating mode provided in this application.

[0030] Figure 7 This is a schematic diagram of the current distribution in the operating mode of the second radiator provided in this application.

[0031] Figure 8 This is a schematic diagram of an antenna grounding scheme provided in an embodiment of this application.

[0032] Figure 9 This is a schematic diagram of an antenna feeding scheme provided in an embodiment of this application.

[0033] Figure 10 This is a schematic diagram of a matching network provided in an embodiment of this application.

[0034] Figure 11 This is a schematic diagram of another antenna structure provided in the embodiments of this application.

[0035] Figure 12 This is a schematic diagram of another antenna structure provided in the embodiments of this application. Detailed Implementation

[0036] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0037] The terminal device in this application embodiment can be a mobile phone, tablet computer, laptop computer, smart bracelet, smartwatch, smart helmet, smart glasses, etc. The terminal device can also be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, terminal device in a 5G network, or terminal device in a future evolved public land mobile network (PLMN), etc., and this application embodiment is not limited to these categories.

[0038] Figure 1 This is a schematic diagram of a terminal device 100 provided in an embodiment of this application. Here, the terminal device 100 is described as a mobile phone.

[0039] like Figure 1 As shown, the terminal device 100 has a cube-like shape and may include a frame 10 and a display screen 20. Both the frame 10 and the display screen 20 can be mounted on the middle frame (not shown in the figure). The frame 10 can be divided into a top frame, a bottom frame, a left frame, and a right frame. These frames are connected to each other, and a certain curvature or chamfer can be formed at the connection point.

[0040] The terminal device 100 also includes a printed circuit board (PCB) disposed inside, on which electronic components can be disposed, including, but not limited to, capacitors, inductors, resistors, processors, cameras, flashlights, microphones, batteries, etc.

[0041] The frame 10 can be a metal frame, such as copper, magnesium alloy, stainless steel, or plastic, glass, ceramic, or a combination of metal and plastic.

[0042] To meet the legal and regulatory requirements for SAR, the antenna structure formed by the metal frame in terminal equipment typically employs, for example... Figure 2 The structure shown.

[0043] like Figure 2As shown, the antenna includes a feed stub 30 and a parasitic stub 40, with the parasitic stub 40 suspended. The feed stub has a feed point 31 near the parasitic stub 40 and a ground point 33 at the end away from the parasitic stub 40. A ground point 32 is located between the ground point 33 and the feed point 31. Typically, the feed stub operates in quarter-mode. In this mode, the parasitic stub 40 is fed by the feed stub 30, generating resonance. This structure is advantageous because it exhibits a smaller power drop and relatively better SAR when testing in the middle band (MHB) head-and-hand mode. Since the mode generated by the parasitic stub 40 is predominantly a balanced mode (half-mode), its radiation performance is good. Therefore, in practical head-and-hand (BHH) scenarios, it is desirable to utilize the balanced mode to ensure the overall radiation performance of the antenna when held in the hand.

[0044] However, in SAR scenarios, it is undesirable to introduce a high SAR half-mode. Since the parasitic stub 40's half-mode satisfies the boundary conditions, its current is concentrated in the central region of the stub 40. Therefore, when the parasitic stub 40 operates in half-mode, it often results in very high SAR, typically failing to meet regulatory requirements. If there are limitations on scenario differentiation, the antenna's transmit power must be forcibly reduced to meet SAR regulatory requirements. For example, when the parasitic stub operates in the high-frequency band B7 (2620MHz~2690MHz) half-mode, its SAR is high, usually failing to meet regulatory requirements, and can only be resolved by forcibly reducing power. In this case, antenna performance cannot be guaranteed.

[0045] Furthermore, in existing technologies, to reduce the high SAR introduced by parasitic stubs in half-wavelength mode, a SAR reduction chip is typically connected to one end of the parasitic stub. The parasitic stub acts as both a radiator and a SAR reduction sensor; when the SAR reduction sensor detects an object within a certain distance, it automatically reduces its transmission power, thereby lowering the SAR value. However, its circuit structure is complex, increasing the difficulty of layout within the terminal device. Simultaneously, due to its lower power, the antenna performance is correspondingly reduced.

[0046] Overall, the limitations of SAR restrict the application of half-wavelength mode, necessitating a distinction between SAR and normal usage scenarios. At the same time, the size limitations of terminal devices prevent the extensive application of floating branches, and a balance must be struck between antenna performance OTA indicators and SAR.

[0047] This application provides an antenna structure that can structurally reduce the SAR in unbalanced mode, solving the problem of excessively high SAR that cannot be maintained when parasitic branches are in operation.

[0048] It should be understood that the impedance characteristics from the feed point to ground can be altered by changing the distance along the feed stub between the feed point and the ground point. For example, as shown in Figure 2, the distance L2 along the feed stub 30 between feed point 31 and ground point 32 is compared to one-quarter of the wavelength λ corresponding to the resonant point of the resonance generated by the parasitic stub 40. Generally, when L2 < 1 / 4λ, the relationship between feed point 31 and ground point 32 exhibits inductive characteristics. The distance L1 along the feed stub 30 between feed point 31 and ground point 33 is compared to one-quarter of the wavelength λ corresponding to the resonant point of the resonance generated by the parasitic stub 40. Generally, when 1 / 4λ < L2 < 3 / 4λ, the relationship between feed point 31 and ground point 33 exhibits inductive characteristics.

[0049] The difference between the two antenna structures lies in the fact that, especially at mid-to-high frequencies, the parasitic stub 40 is typically excited by capacitors. While the feed stub 30 uses inductive excitation, which has minimal impact on the electric field of the excitation mode, if the feed stub 30 uses capacitor excitation, it can generate additional field pulling on the capacitor excitation of the parasitic stub 40, thus dispersing the current during the operation of the parasitic stub 40.

[0050] Figure 3 This is a schematic diagram of the structure of an antenna provided in an embodiment of this application. The antenna is applied in a terminal device, which may also include a feeding unit 130, which can provide electrical signals to the antenna in the terminal device.

[0051] like Figure 3 As shown, the antenna may include a first radiator 110 and a second radiator 120.

[0052] A gap is formed between the first radiator 110 and the second radiator 120. The first radiator 110 includes a feed point 131, which can be located at the end of the first radiator 110 near the gap. The first radiator 110 may also include a first ground point 140, which can be located at the end of the first radiator 110 away from the gap.

[0053] It should be understood that the end of the first radiator 110 that is near or far from the gap can be the distance from the endpoint of the first radiator 110, and not a point.

[0054] When the feed unit 130 feeds at the feed point, the first radiator 110 generates a first resonance. The distance along the surface of the first radiator 110 between the feed point 131 and the first ground point 140 can 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 feed point 131 and the first ground point 140 can exhibit capacitive characteristics, which can be used to pull the electric field generated by the second radiator 120, disperse the current distribution on the surface of the second radiator 120, and thereby reduce the SAR of the second radiator 120.

[0055] Optionally, when the first resonance generated by the first radiator 110 partially overlaps with the second resonance generated by the second radiator 120, the effect of the first radiator 110 in pulling the electric field generated by the second radiator 120 is better.

[0056] It should be understood that the second radiator 120 is located in the strong coupling region of the first radiator 110. When the first resonance generated by the first radiator 110 and the second resonance generated by the second radiator 120 do not overlap, it can also have the effect of breaking up the current distribution on the surface of the second radiator 120.

[0057] Optionally, the first radiator 110 can be the frame in the terminal device, and the second radiator 120 can be realized by laser-direct-structuring (LDS), flexible printed circuit (FPC) printing, or floating metal (FLM) processes.

[0058] Optionally, the second radiator 120 may be a frame in the terminal device.

[0059] Optionally, the first radiator 110 and the second radiator 120 can both be borders in the terminal device, and can be located on any two adjacent borders in the terminal device, or both can be located on any one border in the terminal device.

[0060] Optionally, the second radiator 120, as a parasitic branch, can be fed by coupling from the first radiator 110 through a gap, thereby generating a second resonance.

[0061] It should be understood that the second resonance is generated by the coupling feed of the first radiator 110. Therefore, to ensure good radiation performance of the antenna, the frequency of the resonant point of the second resonance is usually higher than the frequency of the resonant point of the first resonance. However, this application does not limit the resonant frequency of the second resonance, and it can be designed accordingly based on the actual situation.

[0062] Optionally, the distance between the feed point 131 and the first ground point 140 along the surface of the first radiator 110 can be greater than one-quarter of the wavelength corresponding to the resonant point of the first resonance and less than one-half of the wavelength corresponding to the resonant point of the second resonance. This structural design allows the first radiator 110 to better pull the electric field generated by the second radiator 120, thereby further improving the performance of the antenna.

[0063] Optionally, the second radiator 120 may include a second grounding point 150, which may be located at the end of the second radiator 120 away from the gap.

[0064] Optionally, the antenna may also include a first tuning device 160, such as Figure 4 As shown.

[0065] Optionally, the first tuning device 160 can be located at the second grounding point 150 of the second radiator 120, and can be connected in series or in parallel, for adjusting the operating frequency of the antenna. It should be understood that the second resonance can refer to the resonance with the highest resonant frequency among the multiple resonances generated by the second radiator 120.

[0066] Optionally, the first tuning device 160 can be located at the feed point 131 of the first radiator 110, and can be connected in series or in parallel, for adjusting the operating frequency of the antenna. It should be understood that the first resonance can refer to the resonance with the lowest resonant frequency among the multiple resonances generated by the first radiator 110.

[0067] It should be understood that this application does not limit the specific form of the second radiator; the second radiator can operate in half-mode or quarter-mode, etc. As long as the feed point of the first radiator and the first ground point are capacitive, the electric field of the first radiator can be pulled by the second radiator, thereby reducing SAR.

[0068] Figures 5 to 7 This is a simulation result diagram of the antenna provided in the embodiment of this application. Wherein, Figure 5 These are the S-parameters of the antenna provided in the embodiments of this application. Figure 6 This is the current distribution of the first radiator operating mode provided in the embodiment of this application. Figure 7 This refers to the current distribution of the second radiator operating mode provided in this application.

[0069] like Figure 5 As shown, the S-parameters of the first and second resonances generated by the antenna can meet the requirements of the operating frequency band, and the frequency band it covers can be adjusted according to specific design or production needs.

[0070] like Figure 6As shown, compared to the traditional inverted-F antenna (IFA), the current distribution is more dispersed. In this case, the operating mode of the first radiator is between the quarter-mode and the slot mode. For the same model at the same frequency, with a simulation efficiency of -2dBi, the bottom 5mm body SAR test result for the traditional IFA is 2.129 W / kg, while the test result for the first radiator in the antenna structure provided in this embodiment is 1.566 W / kg.

[0071] like Figure 7 As shown, under these two different feeding methods, compared to the parasitic stubs in the traditional IFA structure, the antenna provided in this embodiment shows that the electric field pull of the first radiator causes the current of the second radiator to be scattered, resulting in a significant shunt phenomenon near the slot side, thus reducing the overall SAR of the antenna. When the traditional parasitic stub operates in half mode, the simulation efficiency is -2dBi, and the overall test result of the antenna is 3.318W / kg, while the test result of the antenna structure provided in this embodiment is 2.45W / kg.

[0072] like Figure 8 The diagram shown is a structural schematic of an antenna grounding scheme provided in an embodiment of this application.

[0073] The first grounding point 140 of the first radiator 110 can be electrically connected to the middle frame 50 of the terminal device through the first connector 501, and the second grounding point 150 of the second radiator 120 can be electrically connected to the middle frame 50 of the terminal device through the second connector 502.

[0074] Optionally, the first radiator 110 and the second radiator 120 can be electrically connected to the middle frame 50 by the middle frame of the terminal device being integrally formed with the radiator, or by welding, where the first connector 501 and the second connector 502 are weld points, or the first connector 1501 and the second connector 1502 are metal springs, etc.

[0075] Optionally, an insulating material 60 can be filled between the first radiator 110, the second radiator 120 and the middle frame 50. The insulating material 60 can be plastic, rubber, ceramic, etc. The filling insulating material can improve the overall structural stability of the terminal equipment.

[0076] Figure 9 This is a schematic diagram of an antenna feeding scheme provided in an embodiment of this application.

[0077] like Figure 9 As shown, the antenna feeding unit can be set on the PCB70 of the terminal device and electrically connected to the feeding point of the first radiator 110 through the spring 210.

[0078] It should be understood that the technical solution provided in this application embodiment can also be applied to the grounding structure of the antenna. The antenna is connected to the ground plane through a spring clip. In the terminal device, the ground plane can be the middle frame or a metal layer in the PCB.

[0079] Alternatively, the second radiator can also be grounded using this structure. The second radiator can be mounted on the antenna support and electrically connected to the PCB70 via the spring 210 to achieve grounding.

[0080] It should be understood that a PCB is made by laminating multiple layers of dielectric substrates. There are metal layers in the multiple dielectric substrates, which can be used as the ground plane of the antenna structure.

[0081] Alternatively, the power supply unit may be a power chip in the terminal device.

[0082] Optionally, the antenna may also include a matching network.

[0083] Figure 10 This is a schematic diagram of a matching network 200 provided in an embodiment of this application.

[0084] Matching networks can match the electrical signals in the feed unit with the characteristics of the radiator, minimizing transmission loss and distortion of the electrical signals.

[0085] The matching network 200 may include a first capacitor 2102, a first inductor 2103, and a second capacitor 2104. The first inductor 2103 is connected in series between the feed unit 130 and the first radiator 110. The first capacitor 2102 is connected in parallel to ground between the feed unit 130 and the first inductor 2103. The second capacitor 2104 is connected in parallel to ground between the first inductor 2103 and the first radiator 110. The specific values ​​of the first capacitor 2102, the first inductor 2103, and the second capacitor 2104 can be obtained through calculation and simulation.

[0086] It should be understood that a matching network can be added between the feeding unit and the feeding point of the first radiator. The embodiments of this application only provide an exemplary matching network and do not limit the specific form of the matching network.

[0087] Figure 11 This is a schematic diagram of another antenna structure provided in an embodiment of this application.

[0088] like Figure 11 As shown, the antenna may also include a third radiator 210, which may be located on the side of the second radiator 120 away from the first radiator 110. The third radiator 210 may form a gap with the second radiator 120, and the third resonance is generated by coupling the power through the gap.

[0089] Optionally, the third radiator 210 may include a third grounding point 220, at which the third radiator 210 may be grounded.

[0090] Optionally, the antenna may also include a second tuning device 161, which may be located at the third grounding point 220 of the third radiator 210, and may be connected in series or in parallel, and may be used to adjust the resonant frequency of the antenna.

[0091] It should be understood that while generating a third resonance to extend the antenna's operating bandwidth, the third radiator 210 can provide another electric field traction path for the first radiator 110 or the second radiator 120, further dispersing the current on the radiator surface and thus reducing SAR. The third radiator 210 is located in a weakly coupled region. When the third resonance generated by the third radiator 210 partially overlaps with the first resonance generated by the first radiator 110, it can traction the electric field generated by the first radiator 110, dispersing the current on its surface and reducing its corresponding SAR. When the third resonance generated by the third radiator 210 partially overlaps with the second resonance generated by the second radiator 120, it can traction the electric field generated by the second radiator 120, dispersing the current on its surface and reducing its corresponding SAR. Adjustments can be made according to design and production needs to meet requirements.

[0092] Figure 12 This is a schematic diagram of another antenna structure provided in an embodiment of this application.

[0093] like Figure 12 As shown, the antenna may also include a fourth radiator 310, which may be located on the side of the first radiator 110 away from the second radiator 120. The fourth radiator 310 may form a gap with the first radiator 110, and the third resonance is generated by coupling the power through the gap.

[0094] Optionally, the fourth radiator 310 may include a fourth grounding point 320, at which the fourth radiator 310 may be grounded.

[0095] Optionally, the antenna may also include a third tuning device 161, which may be located at the fourth grounding point 320 of the fourth radiator 310, and may be connected in series or in parallel, and may be used to adjust the resonant frequency of the antenna.

[0096] It should be understood that while generating the fourth resonance to extend the antenna's operating bandwidth, the fourth radiator 310 can provide another electric field traction path for the first radiator 110 or the second radiator 120, further dispersing the current on the radiator surface and thus reducing SAR. The fourth radiator 310 is located in a weakly coupled region. When the fourth resonance generated by the fourth radiator 310 partially overlaps with the first resonance generated by the first radiator 110, it can traction the electric field generated by the first radiator 110, dispersing the current on its surface and reducing its corresponding SAR. When the fourth resonance generated by the fourth radiator 310 partially overlaps with the second resonance generated by the second radiator 120, it can traction the electric field generated by the second radiator 120, dispersing the current on its surface and reducing its corresponding SAR. Adjustments can be made according to design and production needs to meet requirements.

[0097] 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.

[0098] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical or other forms.

[0099] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An antenna, characterized by The antenna includes: First radiator and second radiator; Wherein, a first gap is formed between the first radiator and the second radiator; The first radiator includes a feed point, which is located at one end of the first radiator near the first gap; The first radiator includes a first grounding point, which is located at the end of the first radiator away from the first gap; The third radiator, wherein neither the third radiator nor the second radiator has a feed point; Wherein, the third radiator is located on the side of the second radiator away from the first radiator, and a second gap is formed between the third radiator and the second radiator; or, the third radiator is located on the side of the first radiator away from the second radiator, and a second gap is formed between the third radiator and the first radiator; Wherein, the distance between the feed point and the first ground point along the surface of the first radiator is greater than one-quarter of the wavelength corresponding to the resonant point of the first resonance generated by the first radiator, and less than one-half of the wavelength corresponding to the resonant point of the first resonance.

2. The antenna according to claim 1, characterized in that, The distance between the feed point and the first ground point along the surface of the first radiator is less than half the wavelength corresponding to the resonant point of the second resonance generated by the second radiator.

3. The antenna according to claim 1 or 2, characterized in that The second radiator includes a second grounding point, which is located at the end of the second radiator away from the first gap.

4. The antenna according to claim 3, characterized in that The antenna includes: A first tuning device is disposed at the second grounding point of the second radiator and is used to adjust the frequency of the second resonance generated by the second radiator.

5. The antenna according to any one of claims 1, 2 or 4, characterized in that, The antenna includes: A first tuning device is disposed at the feed point of the first radiator and is used to adjust the frequency of the first resonance generated by the first radiator.

6. The antenna according to any one of claims 1, 2 or 4, characterized by, The first resonance generated by the first radiator is the resonance with the lowest resonant frequency among the multiple resonances generated by the first radiator.

7. The antenna according to any one of claims 1, 2, or 4, characterized in that, The third radiator includes a third grounding point, and the third radiator is grounded at the third grounding point.

8. The antenna according to claim 7, characterized in that The antenna also includes: The second tuning device is disposed at the third grounding point of the third radiator and is used for the frequency of the third resonance generated by the third radiator.

9. The antenna according to any one of claims 1, 2, 4 or 8, characterized by, The third resonance generated by the third radiator partially overlaps with the first resonance generated by the first radiator.

10. The antenna according to any one of claims 1, 2, 4 or 8, characterized by, The third resonance generated by the third radiator partially overlaps with the second resonance generated by the second radiator.

11. The antenna according to any one of claims 1, 2, 4 or 8, characterized by, The first resonance generated by the first radiator partially overlaps with the second resonance generated by the second radiator.

12. A terminal device, comprising: The terminal device includes an antenna as described in any one of claims 1 to 11.

13. The terminal device according to claim 12, characterized by The first radiator, the second radiator, and the third radiator of the antenna are all part of the frame of the terminal device.

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