CN109616750B

CN109616750B - Antenna structure

Info

Publication number: CN109616750B
Application number: CN201811636013.2A
Authority: CN
Inventors: 顾爱琴; 夏明坤; 郁军; 刘恭喜; 江鸽蓝; 李光伟; 陈香利
Original assignee: Pulse Suzhou Wireless Products Co Ltd
Current assignee: Pulse Suzhou Wireless Products Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2023-06-27
Anticipated expiration: 2038-12-29
Also published as: CN109616750A

Abstract

The invention provides an antenna structure, which is characterized by comprising: a metal rear case including a first slot and a second slot, and a first metal arm and a second metal arm formed by division; a first radiator for generating a first resonance signal, one end of which is provided with a feeding point; a second radiator in communication with the feed point through at least one tuning element for generating a second resonant signal; a third radiator formed by extension of the first metal arm for generating a third resonance signal; and a fourth radiator formed by extending the second metal arm for generating a fourth resonance signal. By utilizing the antenna structure, the large-bandwidth antenna integrating 4G and 5G frequency bands can be realized in an all-metal environment.

Description

Antenna structure

Technical Field

The invention belongs to the field of antennas, and particularly relates to an antenna structure.

Background

Because the trend of the appearance design of the current intelligent mobile terminal tends to a metal shell with stable structural performance, the radiation performance of the antenna can be greatly influenced, and even the normal performance of the antenna is difficult to realize. At present, a large-size plastic window needs to be added to the metal environment antenna in the world, and the working frequency range which can be supported is small.

Meanwhile, with the continuous updating of antenna technology, the requirement of integrating the frequency band of the 5G antenna (the fifth generation antenna) as a future development trend and the frequency band of the 4G antenna (the fourth generation antenna) widely used at present into the same communication device is also increasing. However, it is difficult to implement a large bandwidth antenna integrating 4G and 5G frequency bands in an all-metal environment.

Disclosure of Invention

Aiming at the problem that the integrated antenna in the prior art is difficult to integrate the frequency range of the full frequency bands of 4G and 5G in an all-metal environment, an antenna structure is provided, and the problem can be solved by using the antenna structure.

The present invention provides the following.

An antenna structure 100 for use in an electronic device, comprising:

a metal rear case 101, wherein the metal rear case 101 includes a first slot 102 and a second slot 103, and a first metal arm 104 and a second metal arm 105 formed by dividing the first slot and the second slot;

a first radiator 106 disposed on the metal rear case 101 adjacent to the first slot for generating a first resonance signal, one end of the first radiator 106 being provided with a feeding point 107,

a second radiator 108 disposed on the metal rear case 101 adjacent to the second slot 103, the second radiator 108 communicating with the feeding point 107 through at least one tuning element 109 for generating a second resonance signal;

a third radiator 110 formed by extending the first metal arm 104 and coupled to the first radiator for generating a third resonance signal;

a fourth radiator 111, which is formed by extending the second metal arm 105 and is coupled to the second radiator, for generating a fourth resonance signal.

Optionally, the first resonant signal and the third resonant signal are high-frequency resonant signals, the second resonant signal and the fourth resonant signal are low-frequency resonant signals, and the first resonant signal, the third resonant signal, the second resonant signal and the fourth resonant signal radiate outwards through the first slot 102 and the second slot 103.

Optionally, the metal rear case 101 includes a metal frame 112; wherein,,

an L-shaped first extension 113 is connected to the metal rim 112 adjacent to the first slot 102, thereby forming the third radiator;

the L-shaped second extension 114 is connected to the metal rim 112 adjacent to the second slot 103, thereby forming the fourth radiator.

Optionally, the first L-shaped extension part is riveted on the metal frame of the first metal arm by metal nails, and the second L-shaped extension part is riveted on the metal frame of the second metal arm by metal nails, so that the fixation is realized.

Optionally, the first L-shaped extension part is riveted on the metal frame of the first metal arm through a spring plate, and the second L-shaped extension part is riveted on the metal frame of the second metal arm through a spring plate, so that the fixation is realized.

Alternatively, the projection of the first extension 113 in the thickness direction of the metal rear case overlaps at least the first slit 102;

the projection of the second extension 114 in the thickness direction of the metal rear case overlaps at least the second slit 103.

Optionally, a first coupling gap 115 is between the first radiator 106 and the third radiator 110, and a width of the first coupling gap 115 is 2mm;

a second coupling gap 116 is provided between the second radiator 108 and the fourth radiator 111, and the width of the second coupling gap 116 is 2mm.

Optionally, the metal rear case 101 further includes a grounding portion 117.

Optionally, an insulating material is filled in the first slot 102 and the second slot 103.

Optionally, the at least one tuning element 109 is a capacitor and/or an inductor.

Optionally, an insulator bracket 118 is further included, and the first extension 113, the second extension 114, the first radiator 106, and the second radiator 108 are fixed to the metal rear case through the insulator bracket 118.

Alternatively, the thickness of the metal rear case 101 is 4mm.

A communication device comprising a device body and at least one antenna structure as described above, said antenna structure being at least partially arranged in said device body.

The above-mentioned at least one technical scheme that this application embodiment adopted can reach following beneficial effect: the antenna resonant signals of different frequency bands can be realized by directly connecting the wiring of a part of the antenna with the metal arm of the metal shell to serve as the extension part of the metal arm. In addition, the wiring of the other part of the antenna is not in direct contact with metal and is coupled with the metal, so that the performance of the other frequency band of the antenna can be realized. Thus, the large-bandwidth antenna integrating the working frequency range of the 4G frequency band and the 5G frequency band can be realized in an all-metal environment.

It should be understood that the foregoing description is only an overview of the technical solutions of the present invention, so that the technical means of the present invention may be more clearly understood and implemented in accordance with the content of the specification. The following description of the present invention will be made to explain the present invention in detail in order to make the above and other objects, features and advantages of the present invention more apparent.

Drawings

The advantages and benefits described herein, as well as other advantages and benefits, will become apparent to those of ordinary skill in the art upon reading the following detailed description of the exemplary embodiments. The drawings are only for purposes of illustrating exemplary embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 is a reference schematic diagram of an antenna structure according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of an antenna structure according to another embodiment of the present invention;

fig. 3 is another schematic structural view of the antenna structure provided in the embodiment shown in fig. 2;

fig. 4 is a schematic diagram of another structure of the antenna structure provided in the embodiment shown in fig. 2.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the present invention, it should be understood that terms such as "comprises" or "comprising," etc., are intended to indicate the presence of features, numbers, steps, acts, components, portions, or combinations thereof disclosed in the specification, and are not intended to exclude the possibility of the presence of one or more other features, numbers, steps, acts, components, portions, or combinations thereof.

In addition, it should be noted that, without conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

The antenna structure 100 according to the embodiment of the present invention is described in detail below with reference to fig. 1 to 4.

One reference view of the antenna structure 110 in the embodiment shown in fig. 1 may be, for example, an internal structure of a metal back case of a notebook computer, where one or more antenna structures 100 provided in the disclosure are included, and two symmetrical antenna structures 100 are shown in fig. 1, where it is understood that the number of antenna structures is not specifically limited, the shape of the metal back case is not specifically limited, and the application scenario of the antenna structure 100 is not specifically limited.

Fig. 2 shows a schematic diagram of an antenna structure according to an embodiment of the invention, in particular a rear view of the antenna structure 100; fig. 3 shows a further schematic diagram of an antenna structure according to an embodiment of the invention, in particular a front view of the antenna structure 100. Fig. 4 shows a further schematic view of an antenna structure according to an embodiment of the invention, in particular a right side view of the antenna structure 100.

In particular, for ease of understanding, it can be seen that the a-direction view of fig. 4, i.e., the B-direction view of fig. 3, 4, i.e., fig. 2.

Referring to fig. 2 to 4, the antenna structure 100 specifically includes: a metal rear case 101, wherein the metal rear case 101 includes a first slot 102 and a second slot 103, and a first metal arm 104 and a second metal arm 105 formed by dividing the first slot and the second slot.

The rectangular metal rear case 101 is divided by a first slot 102 and a second slot 103 to form a first metal arm 104 and a second metal arm 105. Wherein the first slot 102 is an L-shaped slot, and the second slot 103 is a linear slot; the first slot 102 is opposite to the second slot 103 in the slot direction and does not penetrate through; the first metal arm 104 and the second metal arm 105 have the same width and different lengths.

Alternatively, in the present embodiment, the length of the first metal arm 104 is smaller than the second metal arm 105.

A first radiator 106 is arranged on the metal back case 101 adjacent to the first slot 102 for generating a first resonance signal, one end of the first radiator 106 being provided with a feeding point 107. Specifically, the first radiator 106 is an inverted L-shaped antenna wire, which is disposed parallel to the metal back case 101 as a whole, wherein one section of the antenna wire of the first radiator 106 is disposed between the first slot 102 and the second slot 103 and perpendicular to the first slot 102, and the other section of the antenna wire is disposed between the first slot 102 and the metal back case 101 and parallel to the first slot 102; one end of the first radiator 106 is provided with a feeding point 107, and when in operation, the feeding point 107 feeds the first radiator 106, thereby generating a high-frequency resonance signal, i.e., a first resonance signal. In this embodiment, the structure of the antenna trace includes, but is not limited to, an L-shaped structure, and this embodiment is only described by way of example.

A second radiator 108 is arranged on the metal back case 101 adjacent to the second slot 103, the second radiator 108 being in communication with the feed point 107 via at least one tuning element 109 for generating a second resonance signal. Specifically, the second radiator 108 is a linear antenna trace, which is located between the second slot 103 and the metal back case 101 and is disposed parallel to the second slot 103. One end of the second radiator 108 is connected to the first radiator 106 via at least one tuning element 109, and in operation, the feeding point 107 on the first radiator 106 feeds the second radiator 108 via the at least one tuning element 109, thereby generating a low frequency resonance signal, i.e. a second resonance signal.

A third radiator 110 is formed by extension of the first metal arm 104 and is coupled to the first radiator for generating a third resonance signal. Specifically, the third radiator 110 includes a first metal arm 104 and an L-shaped antenna trace extending from the first metal arm 104, where the L-shaped antenna trace is disposed corresponding to the inverted L-shaped antenna trace of the first radiator 106. In fact, although the first metal arm 104 is part of the metal back-case, in this embodiment it is part of the antenna structure that together with the extended L-shaped antenna trace achieves the antenna performance, a high frequency resonance is achieved when in operation, i.e. a third resonance signal is generated. In this embodiment, the structure of the antenna trace includes, but is not limited to, an L-shaped structure, and this embodiment is only described by way of example.

A fourth radiator 111, formed by extension of the second metal arm 105, is coupled to the second radiator for generating a fourth resonance signal. Specifically, the fourth radiator 111 includes the second metal arm 105 and an L-shaped antenna trace extending from the second metal arm 105. In fact, although the second metal arm 105 is part of the metal back shell, in this embodiment it is part of the antenna structure and the extended L-shaped antenna trace, which together achieve the antenna performance, a low frequency resonance, i.e. a fourth resonance signal, is achieved when in operation. In this embodiment, the structure of the antenna trace includes, but is not limited to, an L-shaped structure, and this embodiment is only described by way of example.

It will be appreciated that neither the third radiator 110 nor the fourth radiator 111 has a feeding point, the third radiator 110 is coupled to the first antenna radiator 106 to obtain a signal from the feeding point 107, the fourth radiator 111 is coupled to the second antenna radiator 108 to obtain a signal from the feeding point 107, and the first antenna radiator 106 and the second antenna radiator 108 can directly obtain a signal from the feeding point 107, so that the number of feeding points can be reduced, which is beneficial to simplifying the antenna structure and reducing the space occupation of the antenna structure.

In this embodiment, the present invention is applicable to a variety of applications. The antenna resonant signals of different frequency bands can be realized by directly connecting the wiring of a part of the antenna with the metal arm of the metal shell to serve as the extension part of the metal arm. In addition, the wiring of the other part of the antenna is not in direct contact with metal and is coupled with the metal, so that the performance of the other frequency band of the antenna can be realized. Thus, the large-bandwidth antenna integrating the working frequency range of the 4G frequency band and the 5G frequency band can be realized in an all-metal environment.

In some embodiments, the first resonant signal is a high frequency resonant signal, the second resonant signal is a low frequency resonant signal, the third resonant signal is a high frequency resonant signal, and the fourth resonant signal is a low frequency resonant signal.

Further, the working frequency of the low-frequency resonance signal is specifically: 700 MHz-960 MHz; the working frequency of the high-frequency resonance signal is specifically as follows: 1700MHz to 2690MHz. The first, second, third and fourth resonance signals radiate outward through the first and

second slots

102 and 103.

In some embodiments, the metal back case 101 includes a metal bezel 112, and further, the third radiator 110 may include a first metal arm 104 and a first extension 113. The fourth radiator 111 may include the second metal arm 105 and the second extension 114 in particular, and the third radiator 110 and the fourth radiator 111 may be formed by the following structures.

An L-shaped first extension 113 is connected to the metal rim 112 adjacent to the first slot 102, thereby forming the third radiator. Specifically, the shorter end of the L-shaped first extension 113 is vertically connected to the metal frame 112, thereby forming a groove. Further, the first radiator is disposed in the groove and is parallel to the first extension 113 and the metal frame. Further, the first extension 113 is not in direct contact with the first radiator 106, but there is a horizontal gap, i.e. a first coupling gap 115, and the distance of the first coupling gap 115 affects the distance between two resonances of high frequencies (i.e. the frequency distance between the first resonance signal and the third resonance signal). The first coupling gap 115 is preferably 2mm.

An L-shaped second extension 114 is connected to the metal rim 112 adjacent to the second slot 103, thereby forming the fourth radiator. Specifically, the shorter end of the L-shaped second extension 114 is vertically connected to the metal frame 112, thereby forming a recess. Further, the second radiator 108 is disposed in the recess and parallel to the second extension. Further, the second extension 114 is not in direct contact with the second radiator 108, but there is a horizontal gap, i.e. a second coupling gap 116, and the distance of the second coupling gap 116 affects the distance between two resonances at low frequencies (i.e. the frequency distance between the second resonant signal and the fourth resonant signal). The second coupling gap 116 is preferably 2mm.

Alternatively, the first L-shaped extension 113 may be riveted to the metal frame 112 of the first metal arm 104 by means of metal nails, and the second L-shaped extension 114 may be riveted to the metal frame 112 of the second metal arm 105 by means of metal nails, thereby achieving the connection.

Alternatively, the L-shaped first extension 113 may be riveted to the metal frame 112 on the first metal arm 104 by a spring, and the L-shaped second extension 114 may be riveted to the metal frame 112 on the second metal arm 105 by a spring, so as to achieve the connection.

In addition, the metal backshell generates an ultra-high frequency resonant signal due to coupling to the first and second radiators, with frequencies around 3.5GHz and 5 GHz. Further, the horizontal distance between the second radiator and the metal rear shell and the horizontal distance between the first radiator and the metal rear shell can influence the ultra-high frequency resonance of the antenna frequency, if the horizontal distance is too close, the coupling can be too strong, the working performance of the ultra-high frequency band can be further influenced, and good resonance can be realized when the horizontal distance is large. In this embodiment, the horizontal spacing is set according to the specific environment, and is not limited herein.

In addition, the offset of the high-frequency band of the antenna can be realized by changing the lengths of the first extension part 113 and the second extension part 114, so that the debugging of the antenna is simpler and more convenient.

In some embodiments, a projection of the first extension 113 in a thickness direction of the metal back case overlaps at least the first slot 102; the projection of the second extension 114 in the thickness direction of the metal rear case overlaps at least the second slit 103. The third resonance signal and the fourth resonance signal can be directly radiated out through the slot, and the radiation performance is high.

In some embodiments, the width of the first coupling gap 115 between the first radiator 106 and the third radiator 110 is 2mm, and the width of the second coupling gap 116 between the second radiator 108 and the fourth radiator 111 is 2mm.

In some embodiments, the metal back case 101 further includes a ground portion 117. Specifically, the first slot and the second slot divide the metal rear case into two parts, one part is a radiation part composed of the first metal arm and the second metal arm, and the other part is the ground part 117. The first metal arm and the second metal arm are communicated with the grounding part, so that the first radiator and the second radiator can be coupled and connected.

In some embodiments, the first slot 102 and the second slot 103 are filled with an insulating material. In particular, the insulator material is preferably plastic.

In some embodiments, the at least one tuning element 109 is a capacitor and/or an inductor.

The tuning element 109 is an inductive or capacitive element, which may be soldered directly to the antenna trace of the second antenna radiator to tune the performance of the low frequency signal. In this embodiment, specific inductance or capacitance values need to be obtained after optimization according to the actual working environment and the smith chart of the reference antenna, which is not limited in this embodiment.

In some embodiments, further comprising an insulator bracket 118, the first extension 113, the second extension 114, the first radiator 106, and the second radiator 108 are secured to the metal back shell by the insulator bracket 118. Specifically, the type and the design height of the insulator bracket 118 may be flexibly set according to practical situations, and preferably, the design height of the insulator bracket 118 may be the distance between the metal rear shell and the bottom surfaces of the first extension portion 113, the second extension portion 114, the first radiator 106, and the second radiator 108. Preferably, the antenna traces of the first extension 113, the second extension 114, the first radiator 106 and the second radiator 108 may be printed on the insulator bracket 118 by printing. It will be appreciated that the provision of the antenna trace via the insulator support 118 is advantageous for improving the operational accuracy of the antenna trace.

In some embodiments, the thickness of the metal back shell 101 is 4mm. In this embodiment, the larger the thickness value of the metal back case 101 is, the better the performance is, and the lower the difficulty in debugging the antenna is. However, considering that the terminals are pursued to be ultra-thin at present, a 4G to 5G wide bandwidth antenna can be realized with a thickness of 4mm in this embodiment.

Specifically, as can be seen from fig. 4, the thickness h of the metal rear case 101 described above refers to the entire thickness of the metal rear case 101.

On the basis of the above embodiment, the embodiment of the present invention further provides a communication device, which specifically includes a device main body and at least one antenna structure as described above, where the antenna structure is at least partially disposed in the device main body.

The communication device can be a plurality of communicable intelligent devices such as a smart phone, a notebook computer, a tablet computer, a wearable mobile intelligent device and the like. This embodiment is not limited thereto.

While the spirit and principles of the present invention have been described with reference to several particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments nor does it imply that features of the various aspects are not useful in combination, nor are they useful in any combination, such as for convenience of description. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An antenna structure (100), characterized by comprising:

a metal rear case (101), the metal rear case (101) comprising a first slot (102) and a second slot (103), and a first metal arm (104) and a second metal arm (105) divided by the first slot and the second slot;

a first radiator (106) arranged on the metal back case (101) and adjacent to the first slot (102) for generating a first resonance signal, one end of the first radiator (106) being provided with a feeding point (107);

-a second radiator (108) arranged on the metal back shell (101) adjacent to the second slot (103), the second radiator (108) being in communication with the feed point (107) through at least one tuning element (109) for generating a second resonance signal;

a third radiator (110) formed by extension of the first metal arm (104) and coupled to the first radiator for generating a third resonant signal;

and a fourth radiator (111) formed by extending the second metal arm (105) and coupled to the second radiator for generating a fourth resonance signal.

2. The antenna structure (100) of claim 1, wherein the first, third and fourth resonant signals are high frequency resonant signals, the second and fourth resonant signals are low frequency resonant signals, and the first, third, second and fourth resonant signals radiate outwardly through the first and second slots (102, 103).

3. The antenna structure (100) of claim 1, wherein the metal back shell (101) comprises a metal bezel (112); wherein,,

-a first L-shaped extension (113) is connected to a metal rim (112) adjacent to the first slot (102), forming the third radiator;

an L-shaped second extension (114) is connected to the metal rim (112) adjacent to the second slot (103) to form the fourth radiator.

4. The antenna structure (100) according to claim 1, wherein,

a first coupling gap (115) is arranged between the first radiator (106) and the third radiator (110), and the width of the first coupling gap (115) is 2mm;

a second coupling gap (116) is arranged between the second radiator (108) and the fourth radiator (111), and the width of the second coupling gap (116) is 2mm.

5. The antenna structure (100) of claim 1, wherein the metal back shell (101) further comprises a ground portion (117).

6. The antenna structure (100) according to claim 1, wherein the first slot (102) and the second slot (103) are filled with an insulating material.

7. The antenna structure (100) according to claim 1, wherein the at least one tuning element (109) is capacitive and/or inductive.

8. The antenna structure (100) of claim 3, further comprising an insulator bracket (118), the first extension (113), the second extension (114), the first radiator (106), and the second radiator (108) being secured to the metal back case by the insulator bracket (118).

9. The antenna structure (100) according to claim 1, wherein the thickness of the metal back shell (101) is 4mm.

10. A communication device comprising a device body and at least one antenna structure according to any of claims 1-9, said antenna structure being at least partially arranged within said device body.