CN110832703B

CN110832703B - Antenna structure and terminal equipment

Info

Publication number: CN110832703B
Application number: CN201880044659.3A
Authority: CN
Inventors: 王吉康; 尤佳庆; 杨小丽; 侯猛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2021-06-29
Anticipated expiration: 2038-05-14
Also published as: CN110832703A; WO2019218125A1

Abstract

The application provides an antenna structure and terminal equipment relates to terminal equipment technical field for solve the isolation problem between a plurality of antennas, thereby improve the performance of antenna, during terminal equipment was applied to this scheme, terminal equipment was including setting up in the metal frame at terminal equipment top, and this metal frame includes first frame and second frame, has first clearance between first frame and the second frame, and this antenna structure includes: the first antenna and the second antenna are positioned in the metal frame and separated by a first gap, the second antenna is used for covering a first frequency band, the frequency band covered by the first antenna is the same as the first frequency band, a part, used for covering the frequency band which is the same as the first frequency band, of the first antenna is positioned on a Printed Circuit Board (PCB) arranged in the metal frame, and the second antenna is arranged on the first frame.

Description

Antenna structure and terminal equipment

Technical Field

The application relates to the technical field of terminal equipment, in particular to an antenna structure and terminal equipment.

Background

In order to enhance the quality of terminal equipment (hereinafter, referred to as a mobile phone as an example), the appearance design of the mobile phone increasingly uses a metal material, but the metal material may shield the antenna signal of the mobile phone, so the use of the metal material may seriously affect the antenna performance of the mobile phone. The wireless communication is used as a necessary function of the mobile phone, the antenna is a necessary component for the wireless communication, and the performance level of the antenna also has various problems related to the quality of the mobile phone call and the like. At present, in order to increase the network operation speed of a mobile phone, the mobile phone has an increasing demand for multiple-input multiple-output (MIMO). Therefore, designing a high-performance antenna based on a metal material becomes a big problem in the industry.

Disclosure of Invention

The application provides an antenna structure and terminal equipment for solve the isolation problem between a plurality of antennas, thereby improve the performance of antenna.

In a first aspect, the present application provides an antenna structure, applied to a terminal device, where the terminal device includes a metal frame disposed at a top of the terminal device, the metal frame includes a first frame and a second frame, a first gap is provided between the first frame and the second frame, and the antenna structure includes: the first antenna and the second antenna are located in the metal frame and separated by a first gap, the second antenna is used for covering a first frequency band, the frequency band covered by the first antenna is the same as the first frequency band, the first antenna comprises a first part, the frequency band covered by the first part is the same as the first frequency band, at least 50% of the first part is arranged on a Printed Circuit Board (PCB) in the metal frame, and the second antenna is arranged on the first frame.

The application provides an antenna structure, it is external with PCB through using the second frame with the first antenna in the metal frame, first antenna uses the radiation of second frame, and first antenna is located printed circuit board, the second antenna sets up on first frame, can make first antenna and the second antenna that have the same frequency channel stagger in the space like this, so that the radiation area of the same frequency channel staggers in the space, realize the promotion of the isolation between the antenna that has the same frequency channel.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the metal frame further includes a third frame, the second frame is located between the first frame and the third frame, a second gap is provided between the third frame and the second frame, the second antenna is further configured to cover a second frequency band, where the second frequency band is lower than the first frequency band, and the antenna structure further includes: and a third antenna spaced apart from the second antenna by a second gap, wherein a part of the second antenna for covering a second frequency band is close to the third antenna, and the frequency band covered by the third antenna is different from the second frequency band. Through setting up that second antenna and third antenna have different frequency channels, can make the regional frequency channel that the radiation phase is close to stagger to the promotion of isolation between the antenna that realizes having different frequency channels.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the second antenna is further configured to cover a third frequency band, where the third frequency band is higher than the second frequency band, and the first antenna includes a first circuit, where the first circuit is configured to isolate a fourth frequency band covered by the first antenna from the third frequency band, and the fourth frequency band is the same as the third frequency band. Therefore, the same frequency band covered by the first antenna and the second antenna can be isolated, so that the isolation between the first antenna and the second antenna is improved.

With reference to any one of the first aspect to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the first circuit includes: and the first capacitor is grounded, or the first circuit is an LC resonance circuit, or the first circuit is a lumped element filter. This makes it possible to make the structure of the first circuit simple.

With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the component used for covering the second frequency band in the second antenna and the component used for covering the first frequency band in the second antenna are located on different sides of the first frame. By arranging the components covering different frequency bands in the same antenna on different sides of the first frame, interference among the components covering different frequency bands in the same antenna can be avoided. Therefore, the isolation between components covering different frequency bands in the same antenna is improved.

With reference to any one of the first aspect to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the means for covering the second frequency band in the second antenna includes: the first end of the first inductor and the first end of the second inductor are connected with the first end of the first frame, the second end of the first inductor is connected with a first grounding end, and the second end of the second inductor is connected with the first grounding end through the first capacitor; the means for covering the first frequency band in the second antenna comprises: the first end of the second capacitor is connected with the second end of the first frame, the second end of the second capacitor is connected with the feed source, the first end of the third capacitor and the first end of the third inductor, and the second end of the third inductor and the second end of the third capacitor are connected with the second grounding end.

With reference to any one of the first aspect to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the third antenna covers a Global Positioning System (GPS) frequency band, a WIFI frequency band, a corresponding B1 frequency band or B3 frequency band or B7 frequency band or B42 frequency band in a Long Term Evolution (LTE) system by using the component used for covering the first frequency band in the second antenna.

With reference to any one of the first aspect to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the first antenna, the second antenna, and the third antenna are all configured to cover a B1 frequency band, a B3 frequency band, or a B7 frequency band corresponding to a Long Term Evolution (LTE) system. Therefore, the top of the terminal equipment can cover the B1 frequency band, the B3 frequency band or the B7 frequency band, and the degree of freedom of design of the antenna at the bottom of the terminal equipment is improved.

In a second aspect, the present application provides a terminal device, where the terminal device includes a metal bezel disposed on a top of the terminal device, where the metal bezel includes a first bezel and a second bezel, and a first gap is formed between the first bezel and the second bezel, and the antenna structure is as described in any one of possible implementation manners of the first aspect to the first aspect.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the metal bezel further includes a third bezel, the second bezel is located between the first bezel and the third bezel, and a second gap is formed between the third bezel and the second bezel.

Drawings

Fig. 1-6 are schematic diagrams of an antenna structure according to an embodiment of the present application;

FIG. 7 is a schematic illustration of a standing wave analysis of a first antenna provided herein;

fig. 8 is a graph illustrating the relationship between the efficiency and the frequency of the first antenna provided in the present application;

FIG. 9 is a schematic illustration of a standing wave analysis of a second antenna provided herein;

FIG. 10 is a graph illustrating efficiency versus frequency for a second antenna provided herein;

fig. 11 is a schematic view of a standing wave analysis of a third antenna provided in the present application;

fig. 12 is a schematic diagram of the efficiency and frequency of the third antenna provided in the present application;

FIG. 13 is a graph of a standing wave analysis for a fourth antenna provided herein;

fig. 14 is a schematic diagram of the efficiency and frequency of the third antenna provided in the present application;

FIG. 15 is a schematic diagram illustrating an analysis of the isolation between a first antenna and a second antenna provided herein;

fig. 16 is an analysis diagram of the isolation between the first antenna and the third antenna provided in the present application;

fig. 17 is an analysis diagram of the isolation between the first antenna and the fourth antenna provided in the present application;

FIG. 18 is a schematic diagram illustrating an analysis of the isolation between the second antenna and the third antenna provided herein;

FIG. 19 is a schematic diagram illustrating an analysis of the isolation between the second antenna and the fourth antenna provided herein;

fig. 20 is an analysis diagram of the isolation between the third antenna and the fourth antenna provided in the present application.

Detailed Description

The terms "first", "second", and the like in the present application are only for distinguishing different objects, and do not limit the order thereof. For example, the first antenna and the second antenna are only used for distinguishing different antennas, and the sequence order thereof is not limited.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein, A and B can be singular or plural. In the description of the present application, "/" indicates an OR meaning, for example, A/B may indicate A or B, unless otherwise indicated. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

As shown in fig. 1, fig. 1 illustrates an antenna structure provided in an embodiment of the present application, where the antenna structure is applied in a terminal device, and the terminal device includes: set up in the metal frame 10 at terminal equipment top, this metal frame 10 includes first frame 101 and second frame 102, wherein has first clearance A between first frame 101 and the second frame 102, and this antenna structure includes: the antenna comprises a first antenna 20 and a second antenna 30 which are positioned in a metal frame 10, wherein the first antenna 20 and the second antenna 30 are separated by a first gap A, the second antenna 30 is used for covering a first frequency band, the frequency band covered by the first antenna 20 is the same as the first frequency band, the first antenna 20 comprises a first part, the frequency band covered by the first part is the same as the first frequency band, most of the first part is arranged on a Printed Circuit Board (PCB) in the metal frame, and the second antenna 30 is arranged on a second frame 102.

A majority of the first components are located on a Printed Circuit Board (PCB) disposed within the metal bezel, and optionally, greater than or equal to 50% of the first components are located on a PCB disposed within the metal bezel.

The application provides an antenna structure, it is external with PCB through using first frame with the first antenna in the metal frame, first antenna uses first frame radiation, and first antenna is located printed circuit board, the second antenna sets up on the second frame, can make first antenna and the second antenna that have the same frequency channel stagger in the space like this, so that the radiation area of the same frequency channel staggers in the space, realize the promotion of the isolation between the antenna that has the same frequency channel.

Optionally, the first frequency band in this embodiment of the application is an intermediate frequency band, and a frequency range of the first frequency band is: 1710MHz to 2170 MHz.

In this embodiment, the same frequency band covered by the first component as the first frequency band may refer to: the range of the frequency band covered by the first component in the first antenna is the same as the range of the frequency band of the first frequency band (for example, the frequency band covered by the first antenna is the first frequency band). Illustratively, taking the first frequency band as 1710MHz to 2170MHz as an example, the frequency band covered by the first antenna is also 1710MHz to 2170 MHz.

Alternatively, in this embodiment, the frequency band covered by the first component is the same as the first frequency band, which may mean: the difference between the frequency range covered by the first component in the first antenna and the frequency range of the first frequency band is smaller than a preset threshold, which is not limited in the present application. In the following embodiments, when two or more frequency bands are the same, reference may be made to the description herein, and further description of the embodiments of the present application is omitted.

It is to be understood that the first component mentioned in the embodiments of the present application may also be understood as a component for covering the first frequency band in the first antenna.

It is understood that the second frame 102 in the present application is perpendicular to the first frame 101, as shown in fig. 1. Optionally, a portion of the first frame 101 close to the second frame 102 is arc-shaped. For the specific structures of the second frame 102 and the first frame 101, reference may be made to the structure of a metal frame of a terminal device in the prior art, which is not described herein again.

Optionally, the width of the first gap a in this application is: 1.2 mm-2.0 mm. Illustratively, the width of the first gap a in the embodiments of the present application is 1.5 mm.

For example, the PCB in the present application may be a flexible printed circuit board (FPC). Wherein, the flexible circuit board can also be referred to as: and (4) a soft board.

As another embodiment of the present application, as shown in fig. 2, the metal bezel 10 further includes a third bezel 103. The second frame 102 is located between the first frame 101 and the third frame 103, a second gap B is provided between the third frame 103 and the second frame 102, the second antenna 30 is further configured to cover a second frequency band, where the second frequency band is lower than the first frequency band, and the antenna structure further includes:

a third antenna 40, the third antenna 40 being separated from the second antenna 30 by a second gap B, the second antenna 30 being close to the third antenna 40 for covering a second frequency band, the third antenna 40 covering a frequency band different from said second frequency band.

Optionally, the width of the second gap B in this application is: 1.2 mm-2.0 mm. Illustratively, the width of the first gap B in the embodiments of the present application is 1.5 mm.

Optionally, the second frequency band in this application may be a low frequency band. The frequency range of the second frequency band is as follows: 700MHz to 960 MHz.

In this embodiment, the frequency band covered by the third antenna 40 is different from the second frequency band: the third antenna 40 covers a frequency band in a range different from the frequency band range of the second frequency band. Or may also be understood as: the range of frequency bands covered by the third antenna 40 does not intersect the range of frequency bands of the second frequency band. Illustratively, the second frequency band is a low frequency band, and the frequency band covered by the third antenna 40 is an intermediate frequency band or a high frequency band. Specifically, the range of the intermediate frequency band can be 1710-2170 MHz. The coverage of the high frequency band may be: 2300MHz to 2700 MHz.

The component of the second antenna 30 for covering the second frequency band may be an IFA antenna, for example.

In the embodiment of the present application, the IFA antenna is also referred to as an inverted F antenna, and the shape of the antenna is an inverted "F", and the IFA antenna includes a grounding point and a feeding point. Generally, the radiation portion of the IFA antenna is a flat plate or a straight line, and the IFA antenna further includes a ground pin connected between the ground point and the radiation portion and a feeding portion connected between the feeding point and the radiation portion. The feed point and the ground pin may be parallel to each other, and both may be perpendicular to the radiating portion.

Optionally, the component for covering the second frequency band in the second antenna 30 is located on the second frame 102 and near one end of the third antenna 40.

Exemplarily, as shown in fig. 3, fig. 3 shows a specific structure of a component for covering the second frequency band in the second antenna 30 provided in the embodiment of the present application, where the component for covering the second frequency band in the second antenna 30 includes: a first inductor L1, a second inductor L2, and a first capacitor C1. The first end of the first inductor L1 and the first end of the second inductor L2 are connected to the first end of the second bezel 102. The second terminal of the first inductor L1 is connected to the first ground G1, and the second terminal of the second inductor L2 is connected to the first ground G1 through the first capacitor C1.

The first end of the second frame 102 can be understood as an end of the second frame 102 near the third antenna 40.

The means for covering the first frequency band in the second antenna 30 comprise: a second capacitor C2, a third capacitor C3, a third inductor L3, and a feeding source F1. A first end of the second capacitor C2 is connected to a second end of the second frame 102, a second end of the second capacitor C2 is connected to the power supply, a first end of the third capacitor C3, and a first end of the third inductor L3, and a second end of the third inductor L3 and a second end of the third capacitor C3 are connected to the second ground G2.

The size of the first capacitor C1, the size of the first inductor L1, and the size of the second inductor L2 are not limited in this application, and the size of the first capacitor C1, the size of the first inductor L1, and the size of the second inductor L2 may be selected according to the first frequency band for coverage in the second antenna. Illustratively, in the present application, the first capacitor C1 has a size of 1pF, the first inductor L1 has a size of 68nH, and the second inductor L2 has a size of 5 nH.

Illustratively, in the present application, the size of the second capacitor C2 is 4pF, the size of the third capacitor C3 is 1.4pF, and the size of the third inductor L3 is 3 nH.

As shown in fig. 3, the second frame 102 is also connected to a third ground G3.

It can be understood that, in the embodiment of the present application, the component for covering the second frequency band and the component for covering the first frequency band in the second antenna 30 are coupled with the second frame 102, so that the frequency band range of the second antenna 30 is one or more of the following frequency bands: the LTE system corresponds to a B28 frequency band, a B5 frequency band, a B8 frequency band, a B3 frequency band, a B1 frequency band, a B40 frequency band, and a B7 frequency band.

It should be noted that, the specific range of the BX frequency band in the embodiment of the present application may be determined by a frequency band coverage in the LTE system. Of course, with the evolution of the communication system, the specific frequency range corresponding to the BX frequency band in the LTE system is also applicable to the frequency band covering the same frequency range in the future mobile communication system. That is, if the coverage area of a certain frequency band in the future communication system is equal to the BX frequency band, the BX frequency band may also be a certain frequency band in the future communication system.

Among them, the part for covering the second frequency band in the second antenna 30 radiates by using the whole second frame, which is advantageous for increasing the aperture of the antenna.

It should be noted that, in the embodiment of the present application, both ends of the second antenna 30 are open, which is beneficial for low frequency band radiation.

As another embodiment of the present application, as shown in fig. 4, the second antenna 30 is further configured to cover a third frequency band, the third frequency band is higher than the second frequency band, the first antenna 20 includes a first circuit, the first circuit is configured to isolate a fourth frequency band covered by the first antenna from the third frequency band, and the fourth frequency band is the same as the third frequency band.

And the fourth frequency band is a high-frequency band. The first antenna in the embodiment of the application can be used for covering not only the intermediate frequency band but also the high frequency band.

Wherein the first part is further configured to cover a high frequency band, wherein the first part may employ a LOOP (LOOP) antenna scheme, and the first part is close to the second antenna. The return ground feet of the LOOP antenna on the first frame are connected with a small capacitor in series and return to the ground. As shown in fig. 4, the fourth capacitor C4 is connected to the first frame at a side near the first interval a, and the fourth capacitor is grounded through G4. Therefore, the LOOP antenna is connected with the small capacitor in series and then is grounded, so that the problem of the isolation between the fourth frequency band covered by the first antenna and the third frequency band covered by the second antenna can be solved.

Optionally, the first antenna in this embodiment of the application is an antenna formed by coupling the FPC with the frame 101. Wherein the FPC part accounts for more than 50 percent. Wherein the portion of the first member for covering the intermediate frequency is formed by coupling the FPC to the lower half of the bezel 101 (e.g., the bezel between P and Q in fig. 4). The part of the first component for covering high frequency is formed by coupling the FPC and the whole frame.

Optionally, the third frequency band may be a high frequency band, and the frequency range of the third frequency band is: 2300MHz to 2700 MHz.

Illustratively, the first circuit includes: a fifth capacitor, the fifth capacitor being grounded. Alternatively, as shown in fig. 4, the first circuit is an LC resonance circuit including a capacitor C5 and an inductor L4. Or the first circuit is a lumped device filter. For example, an active filter, which is not limited in the embodiments of the present application. Optionally, the capacitor C5 and the inductor L4 are located on the FPC.

Illustratively, as shown in fig. 3 or 4 above, the components of the second antenna 30 for covering the second frequency band are located on a different side of the second bezel 102 than the components of the second antenna 30 for covering the first frequency band. It can also be understood that: the components of the second antenna 30 for covering the first frequency band are located on the second rim 102 near one end of the first gap a. The part of the second antenna 30 for covering the second frequency band is located on the second rim 102 near one end of the second gap B.

Optionally, the third antenna 40 covers one or more of the following frequency bands with the means for covering the first frequency band in the second antenna 30: a global positioning system GPS frequency band, a WIFI frequency band, a B1 frequency band, a B3 frequency band, a B7 frequency band and a B42 frequency band corresponding to a long term evolution LTE system.

The frequency range of the GPS frequency band is as follows: 1575 MHz.

The WIFI frequency band may include at least one of a frequency band range of WIFI2.4 or a frequency band range of WIFI 5. Wherein, this WIFI 2.4's frequency channel scope is: 2400-2500 MHz. Or the frequency band range of the WIFI5 is: 5100-5800 MHz.

Optionally, in this embodiment of the present application, a frequency range covered by the first antenna is: corresponding B1 band/B3 band/B7 band/B42 band in a long term evolution, LTE, system.

In summary, the frequency bands used by the first antenna 20, the second antenna 30, and the third antenna 40 in the embodiment of the present application are in one or more of the following frequency bands: corresponding B28 frequency band, B3 frequency band and B7 frequency band in the LTE system.

As shown in fig. 5, the third antenna 40 in the embodiment of the present application includes a sixth capacitor C6 and a power supply F3, wherein a first end of the sixth capacitor C6 is connected to the third frame 103, a second end of the sixth capacitor C6 is connected to the power supply F3, and the third frame 103 is connected to the fifth ground G5.

In summary, as can be seen from fig. 1 to fig. 5, in the embodiment of the present application, at least three antennas for covering the B1 frequency band, the B3 frequency band, and the B7 frequency band may be disposed inside a top metal edge of the terminal device (for example, under a clearance of 1.5 mm), so that space is reserved for antennas disposed in subsequent terminal devices by using the layout of the antennas in a minimized manner.

In the embodiment of the present application, the first antenna, the second antenna, and the third antenna are all MIMO antennas.

Optionally, in this embodiment of the present application, a camera (camera) may be disposed between the component for covering the first frequency band and the component for covering the second frequency band in the second antenna. Due to the loading of the camera, the higher mode of the long stub of the second antenna can be coupled out at the third antenna end, and the isolation problem is solved by shifting the filtering ground of the ground under Near Field Communication (NFC).

Optionally, as another embodiment of the present application, as shown in fig. 6, the terminal device further includes a middle frame 50, and a third gap C is formed between the middle frame 50 and the metal frame 10. Wherein, the third gap C is located on the same side as the third frame 103, the antenna structure further includes a fourth antenna 60, the fourth antenna 60 is located in the middle frame 50 and is separated from the third antenna 40 by the third gap C, and the fourth antenna 60 is used for covering one or more of the WIFI frequency band and the B42 frequency band.

Illustratively, the fourth antenna 60 includes a feeding source and a capacitor C7, wherein the feeding source and the capacitor C7 are connected to the middle frame 50 through a metal plate. The middle frame 50 is grounded.

The third antenna and the fourth antenna are located on the same side of the terminal device, and requirements for isolation and ECC are met through the core 1 antenna scheme.

It should be noted that, in the embodiment of the present application, a frequency band covered by a certain antenna is: a WIFI frequency band, a B1 frequency band, a B3 frequency band, a B7 frequency band, and a B42 frequency band. Specifically, a specific frequency range corresponding to a certain frequency band may refer to a description related to an LTE system or a next generation communication system in the prior art, and this embodiment of the present application is not described herein again.

Optionally, in the embodiment of the present application, the first antenna is externally connected to an FPC, so that the first antenna covers a B1, a B3, or a B7 frequency band. However, the antenna of the external connection portion of the first antenna is not limited to the FPC, and may be an embedded steel sheet, or may be a laser-direct-structuring (LDS) antenna.

The first antenna uses FPC to realize components of B1, B3 and B7 frequency bands, and the components can be in the form of IFA, left-hand and other antennas.

As shown in fig. 7, fig. 7 shows a standing wave analysis schematic diagram of the first antenna provided in the present application, in fig. 7, the horizontal axis represents frequency, and the vertical axis represents return loss. In FIG. 7, the coordinates of the point D are (1.277GHz, -24.578dBA), the coordinates of the point A are (2.0931GHz, -1.9676dBA), the coordinates of the point B are (2.743GHz, -1.5282dBA), and the coordinates of the point C are (3.4721GHz, -14.873 dBA).

Specifically, as shown in fig. 5, at D, the current (line labeled 1 in fig. 5) passes primarily from the first bezel 101 through a low-pass high-impedance filter to the reverse "left-hand" configuration of the feed. At a, the LOOP antenna current (line labeled 2 in fig. 5) reverse dots on the FPC underside, with less current at the top of the middle frame. At B, the LOOP antenna current (line labeled 3 in fig. 5) reverse dots on the FPC underside, the mid-frame top current is enhanced compared to at a. The first antenna has two reversal points at C.

As shown in fig. 8, fig. 8 shows a graph of the relationship between the efficiency and the frequency of the first antenna.

As shown in fig. 9, fig. 9 shows a schematic diagram of the standing wave analysis of the second antenna, in fig. 9, the coordinates of point E are (0.80615GHz, -2.9799dBa), the coordinates of point F are (0.94397GHz, -10.274dBa), the coordinates of point G are (1.7679GHz, -3.1094dBa), and the coordinates of point H are (2.6422GHz, -4.4599 dBa).

As shown in fig. 10, fig. 10 shows a schematic diagram of efficiency and frequency comparison of the second antenna of the present application, in fig. 10, the coordinates of a1 are (.78279GHz, -8.6026dBp), the coordinates of a2 are (0.95467GHz, -8.2456dBp), the coordinates of A3 are (2.15GHz, -7.5008dBp), and the coordinates of a4 are (2.75GHz, -4.5922 dBp).

As shown in fig. 11, fig. 11 shows a schematic diagram of standing wave analysis of the third antenna of the present application, in fig. 11, coordinates at B1 are (1.5604GHz, -3.8411dBa), coordinates at B2 are (2.4926GHz, -5.0708dBa), coordinates at B3 are (3.5417GHz, -11.306dBa), coordinates at B4 are (5.2785GHz, -14.809dBa), and coordinates at B5 are (5.7913GHz, -3.7988 dBa).

As shown in fig. 12, fig. 12 shows a graph of efficiency and frequency of the third antenna of the present application, where the line labeled 5 in fig. 12 represents the radiation efficiency of the GPS antenna and the line labeled 6 represents the system efficiency of the GPS antenna. The coordinates at C1 are (1.58GHz, -2.9127dBP), the coordinates at C2 are (1.7524GHz, -5.6569dBP), the coordinates at C3 are (2.0574GHz, -6.0186dBP), the coordinates at C4 are (2.48GHz, -2.502dBP), the coordinates at C5 are (2.6881GHz, -6.466dBP), the coordinates at C6 are (3.54GHz, -0.95939dBP), and the coordinates at C7 are (5.1148GHz, -4.5484 dBP).

As shown in fig. 13, fig. 13 shows a standing wave analysis diagram of the fourth antenna. The coordinates at D1 are (2.3859GHz, -7.1073dBA), the coordinates at D2 are (3.4736GHz, -13.557dBA), and the coordinates at D3 are (5.6994GHz, -16.568 dBA).

As shown in fig. 14, fig. 14 shows a schematic diagram of the efficiency and frequency of the third antenna of the present application, in fig. 14, coordinates at E1 are (2.3912GHz, -4.6502dBp), coordinates at E2 are (3.46GHz, -1.4009dBp), and coordinates at E3 are (5.7GHz, -0.91828 dBp).

Wherein, E1 represents the efficiency and frequency diagram of WIFI2.4 in the pull-down mode, E2 represents the efficiency and frequency diagram of B42 band radiated by the fourth antenna, and E3 represents the efficiency and frequency diagram of WIFI 5.

As shown in fig. 15, fig. 15 shows an analysis of the isolation between the first antenna and the second antenna in the embodiment of the present application, where the line labeled 7 in fig. 15 represents the isolation of the first antenna, the line labeled 8 represents the isolation of the second antenna, and the line labeled 9 represents a comparison diagram of the isolation of the first antenna and the isolation of the second antenna.

As shown in fig. 16, fig. 16 shows an analysis of the isolation between the first antenna and the third antenna in the embodiment of the present application, where the line labeled 7 in fig. 16 represents the isolation of the first antenna, the line labeled 10 represents the isolation of the third antenna, and the line labeled 11 represents a comparison diagram of the isolation of the first antenna and the isolation of the third antenna.

As shown in fig. 17, fig. 17 illustrates an analysis of the isolation between the first antenna and the fourth antenna in the embodiment of the present application, where the line labeled 7 in fig. 17 represents the isolation of the first antenna, the line labeled 12 represents the isolation of the fourth antenna, and the line labeled 13 represents a comparison diagram of the isolation of the first antenna and the isolation of the fourth antenna.

As shown in fig. 18, fig. 18 shows an analysis of the isolation between the second antenna and the third antenna in the embodiment of the present application, where the line labeled 8 in fig. 18 represents the isolation of the second antenna, the line labeled 10 represents the isolation of the third antenna, and the line labeled 14 represents the isolation of the second antenna and the isolation of the third antenna in comparison.

As shown in fig. 19, fig. 19 shows an analysis of the isolation between the second antenna and the fourth antenna in the embodiment of the present application, where the line labeled 8 in fig. 19 represents the isolation of the second antenna, the line labeled 12 represents the isolation of the fourth antenna, and the line labeled 15 represents a comparison diagram of the isolation of the second antenna and the isolation of the fourth antenna.

As shown in fig. 20, fig. 20 shows an analysis of the isolation between the third antenna and the fourth antenna in the embodiment of the present application, where the line marked as 10 in fig. 20 represents the isolation of the third antenna, the line marked as 12 represents the isolation of the fourth antenna, and the line marked as 16 represents the isolation of the third antenna and the isolation of the fourth antenna in comparison.

In another aspect, the present application provides a terminal device, which includes a metal bezel disposed on a top of the terminal device, where the metal bezel includes a first bezel and a second bezel, and a first gap and an antenna structure shown in any one of fig. 1 to 6 are provided between the first bezel and the second bezel.

The optional metal bezel further comprises a third bezel, the second bezel is located between the first bezel and the third bezel, and a second gap is provided between the third bezel and the second bezel.

The above description is only a specific implementation of the embodiments of the present invention, but the scope of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments of the present invention, and all such changes or substitutions should be covered by the scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an antenna structure, its characterized in that is applied to in the terminal equipment, the terminal equipment including set up in the metal frame at terminal equipment top, the metal frame includes first frame and second frame, first frame with first clearance has between the second frame, antenna structure includes:

the first antenna and the second antenna are located in the metal frame and separated by the first gap, the second antenna is used for covering a first frequency band, the frequency band covered by the first antenna is the same as the first frequency band, the first antenna comprises a first part, the frequency band covered by the first part is the same as the first frequency band, at least 50% of the first part is arranged on a Printed Circuit Board (PCB) in the metal frame, and the second antenna is arranged on the second frame.

2. The antenna structure of claim 1, wherein the metal bezel further comprises a third bezel, the second bezel is located between the first bezel and the third bezel, a second gap is provided between the third bezel and the second bezel, the second antenna is further configured to cover a second frequency band, wherein the second frequency band is lower than the first frequency band, and the antenna structure further comprises:

and the third antenna and the second antenna are separated by the second gap, a component used for covering the second frequency band in the second antenna is close to the third antenna, and the frequency band covered by the third antenna is different from the second frequency band.

3. The antenna structure of claim 2, wherein the second antenna is further configured to cover a third frequency band, the third frequency band being higher than the second frequency band, the first antenna further comprising a first circuit configured to isolate a fourth frequency band covered by the first antenna from the third frequency band, the fourth frequency band being the same as the third frequency band.

4. The antenna structure of claim 3, wherein the first circuit comprises: the first capacitor is grounded, or the first circuit is an LC resonance circuit, or the first circuit is a lumped element filter.

5. The antenna structure according to any of claims 2-4, characterized in that the means for covering the second frequency band in the second antenna are located on different sides of the second rim than the means for covering the first frequency band in the second antenna.

6. The antenna structure according to claim 5, characterized in that the means in the second antenna for covering the second frequency band comprise: the first end of the first inductor and the first end of the second inductor are connected with the first end of the second frame, the second end of the first inductor is connected with a first grounding end, and the second end of the second inductor is connected with the first grounding end through the first capacitor;

the means in the second antenna for covering the first frequency band comprises: the second capacitor, the third inductor and the feed source, wherein the first end of the second capacitor is connected with the second end of the second frame, the second end of the second capacitor is connected with the feed source, the first end of the third capacitor and the first end of the third inductor, and the second end of the third inductor and the second end of the third capacitor are connected with the second grounding end.

7. The antenna structure according to any of claims 2-4, 6, characterized in that the third antenna covers the global positioning system, GPS, WIFI, corresponding B1 or B3 or B7 or B42 bands in the LTE-Long term evolution system with the part of the second antenna covering the first band.

8. The antenna structure according to any of claims 2-4, 6, wherein the first antenna, the second antenna and the third antenna are all configured to cover corresponding B1 band, B3 band or B7 band in a Long Term Evolution (LTE) system.

9. A terminal device, characterized in that the terminal device comprises a metal bezel arranged on top of the terminal device, the metal bezel comprising a first bezel and a second bezel with a first gap therebetween and an antenna structure according to any one of claims 1 to 8.

10. The terminal device of claim 9, wherein the metal bezel further comprises a third bezel, wherein the second bezel is positioned between the first bezel and the third bezel with a second gap therebetween.