WO2019149187A1

WO2019149187A1 - Broadband dual-polarized antenna and radiation device thereof

Info

Publication number: WO2019149187A1
Application number: PCT/CN2019/073658
Authority: WO
Inventors: 王强; 陈强; 陈汝承
Original assignee: 京信通信系统（中国）有限公司; 京信通信技术(广州)有限公司; 京信通信系统（广州）有限公司; 天津京信通信系统有限公司
Priority date: 2018-01-30
Filing date: 2019-01-29
Publication date: 2019-08-08
Also published as: CN108110409A

Abstract

Disclosed in the present application are a broadband dual-polarized radiation device and an antenna that applies the broadband dual-polarized radiation device. The broadband dual-polarized radiation device comprises a base, four baluns connected to the base, and four dipoles arranged in one-to-one correspondence at top ends of the four baluns; each of the dipoles comprises two radiation arms disposed to form an angle, and each of the radiation arms comprises a horizontal radiation arm and a downwardly extending radiation arm that bends and extends downward along an inner side of the horizontal radiation arm; a plane jointly formed by external edges of each horizontal radiation arm of the four dipoles is quadrilateral, and a plane jointly formed by internal edges of each horizontal radiation arm of the four dipoles is octagonal. The broadband dual-polarized radiation device has a broad frequency band, dual polarization, and a compact structure.

Description

Wide-band dual-polarized antenna and radiation device thereof

Technical field

The present application relates to the field of communication technologies, and in particular, to a broadband dual-polarized antenna and a radiation device thereof.

Background technique

With the acceleration of global 4G network construction and the continuous upgrading of mobile communication systems, broadband, miniaturization and high quality have become the main considerations for modern antenna design. In particular, in order to satisfy the fluctuation characteristics of gain, bandwidth characteristics, half power angle, cross polarization, and front-to-back ratio with frequency, the implementation form of the dual-polarized antenna is constantly being updated.

At the same time, with the increasing tension of the surface resources and the panic of some people on electromagnetic radiation, site selection and station construction are facing great difficulties, which seriously affects the network construction of modern communication.

Therefore, it is an urgent need of operators to be able to support 2G, 3G, 4G, and 5G base station antennas at the same time. The antennas currently required by the three major operators in China must support both 800MHz and 900MHz, but the current ultra-wideband dual-polarized antennas supporting 600MHz, 700MHz, 800MHz and 900MHz have been proposed in the industry, and the ultra-wideband low-frequency radiating element will also be A trend in future development.

Summary of the invention

In order to solve the above problems of at least one aspect, the present application provides a broadband, dual-polarized, compact broadband dual-polarized radiation device.

Meanwhile, the present application also provides a broadband dual-polarized antenna to which the broadband dual-polarized radiation device is applied.

In order to achieve the purpose of the present application, the following technical solutions are adopted:

A broadband dual-polarization radiation device comprising a base, four baluns connected to the base, and four dipoles correspondingly disposed at the top of the four baluns; each of the dipoles comprises Two radiating arms disposed at an angle, each of the radiating arms including a horizontal radiating arm and a downwardly extending radiating arm extending downwardly along an inner side of the horizontal radiating arm, each of the four dipoles The plane surrounded by the outer edges of the horizontal radiating arms is quadrangular, and the planes of the inner edges of the horizontal radiating arms of the four dipoles are octagonal.

Specifically, at least one pair of adjacent ones of the dipoles have a gap between two adjacent ones of the radiating arms.

Specifically, the horizontal radiating arm is disposed at an obtuse angle of 135° or less between the lower extending radiating arm extending downwardly along the inner side thereof.

Further, the ends of two adjacent radiating arms having a gap are provided with loading branches, and the loading branches are perpendicular to the plane of the radiating arms.

Further, the distance from the end of the loading branch to the base is less than 0.1 times the wavelength of the center frequency of the working frequency band.

Further, a parasitic unit disposed in the octagonal structure is further included, and the parasitic unit is disposed on the base through a support.

Further, a distance between an edge of the parasitic unit and the lower extending radiation arm is less than 10 mm.

Further, the height of the parasitic unit relative to the base is 0.1-0.15 times the wavelength of the center frequency of the operating band.

Further, the parasitic unit is fixed to the base by the support member made of an insulating medium or metal.

Further, the parasitic unit is integrally formed with the support.

Further, the support member is integrally formed with the base.

Specifically, each of the baluns includes two balun arms arranged side by side and coplanar with the gaps, and the two balun arms are respectively connected to the corresponding lower extending radiation arms, and the two of the balun arms are opposite One side extends from bottom to top to form a stepped structure and a gap that increases in order from bottom to top is formed between the two of the balun arms.

Specifically, the balun is provided with a feeding port for feeding the dipole, and the feeding port is located below the step.

Specifically, the balun extends upward from the base at an acute angle of not less than 45° with the base.

At the same time, the present application also provides a broadband dual-polarized antenna comprising the above-described broadband dual-polarized radiation device.

Compared with the prior art, the solution of the present application has the following advantages:

1. In the technical solution of the present application, the pattern formed by connecting the outer sides of the horizontal radiating arms is defined as a quadrangle, and the pattern formed by connecting the inner sides of the horizontal radiating arms is defined as eight sides. The shape changes the coupling amount between the feed ports, effectively suppresses the mutual coupling between the polarizations, and improves the isolation of the ports.

2. In the technical solution of the present application, in the radiating arms with adjacent dipoles having gaps, the lower extending radiating arms of the radiating arms are provided with loading branches, which effectively widens the resonant current path on the dipoles, and can be realized. The effect of reducing the aperture of the broadband dual-polarization radiation device and reducing the overall height of the broadband dual-polarization radiation device, thereby miniaturizing the radiation device and facilitating miniaturization of the antenna.

3. In the technical solution of the present application, the parasitic unit is coupled with the radiating arm, and the parameter of the feeding port S can be adjusted by adjusting the coupling gap and the size to realize the optimal design of the circuit index.

The aspects and advantages of the present invention will be set forth in part in the description which follows.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application. Other drawings can also be obtained from those skilled in the art based on these drawings without paying any creative effort.

1 is a schematic structural view of an embodiment of a broadband dual-polarization radiation device in the present application;

2 is a schematic structural view of another angle of the broadband dual-polarization radiation device shown in FIG. 1;

Figure 3 is a structural exploded view of a broadband dual-polarization radiation device shown in Figure 1;

4 is a structural exploded view of another embodiment of a broadband dual-polarization radiation device of the present application;

Figure 5 is a structural exploded view of still another embodiment of a broadband dual-polarization radiation device of the present application.

Detailed ways

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is apparent that the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by a person skilled in the art based on the embodiments of the present application without creative efforts are within the scope of the present application.

1 and 2, a schematic structural view of an embodiment of a broadband dual-polarization radiation device in the present application is shown.

The broadband dual-polarized radiation device 100 includes a base 1, four

baluns

11, 12, 13, 14 connected to the base 1, and one-to-one correspondences corresponding to the four

baluns

11, 12, 13, 14 Four

dipoles

21, 22, 23, 24 at the top.

Each of the dipoles includes two radiating arms disposed at an angle, each of the radiating arms including a horizontal radiating arm and a downwardly extending radiating arm extending downwardly along an inner side of the horizontal radiating arm, four The plane surrounded by the inner edges of the horizontal radiating arms of the dipoles is octagonal, and the planes of the outer edges of the horizontal radiating arms of the four dipoles are quadrangular.

With continued reference to FIG. 1, the dipole 21 includes two

radiating arms

21a and 21b disposed at an included angle, the radiating arm 21a including a horizontal radiating arm 211 and a lower extending radiating arm 212, the radiating arm 21b including a horizontal radiating arm The 213 and the lower extension radiating arm 214.

The dipole 22 includes two

radiating arms

22a and 22b disposed at an included angle, the radiating arm 22a including a horizontal radiating arm 221 and a lower extending radiating arm 222, the radiating arm 22b including a horizontal radiating arm 223 and a lower extending radiating arm 224.

The dipole 23 includes two

radiating arms

23a and 23b disposed at an included angle, the radiating arm 23a including a horizontal radiating arm 231 and a lower extending radiating arm 232, the radiating arm 23b including a horizontal radiating arm 233 and a lower extending radiating arm 234.

The dipole 24 includes two

radiating arms

24a and 24b disposed at an included angle, the radiating arm 24a including a horizontal radiating arm 241 and a lower extending radiating arm 242, the radiating arm 24b including a horizontal radiating arm 243 and a lower extending radiating arm 244. The outer edges of the horizontal radiating

arms

211, 213, 221, 223, 231, 233, 241, 243 are collectively formed into a quadrangle, and the inner edges are collectively formed into an octagon.

Wherein, the presence of each of the lower extension radiating arms further increases the surface high frequency current path of the dipole in a limited physical size, further reducing the physical size of the broadband dual polarized radiation device 100.

The broadband dual-polarized radiation device 100 has a wide frequency band, is dual-polarized, and has a compact structure, and is defined by a pattern formed by the outer side edges of the respective radiating arms as a quadrangle, and the inner side of each of the radiating arms is The pattern formed by the extension connection is defined as an octagon, which changes the coupling amount between the feed ports, effectively suppresses the mutual coupling between the polarizations, and improves the isolation of the ports.

Preferably, the horizontal radiating arm is disposed at an obtuse angle of 135 or less between the lower extending radiating arm extending downwardly along the inner side thereof.

Wherein, the horizontal radiation arm 211 and the lower extension radiation arm 212 are disposed at an obtuse angle of 135 or less, and the horizontal radiation arm 213 and the lower extension radiation arm 214 are at an obtuse angle of 135 or less. It is provided that the horizontal radiating arm 221 and the lower extending radiating arm 222 are disposed at an obtuse angle of 135 or less, and the horizontal radiating arm 223 and the lower extending radiating arm 224 are at an obtuse angle of 135 or less. It is provided that the horizontal radiation arm 231 and the lower extension radiation arm 232 are disposed at an obtuse angle of 135 or less, and the horizontal radiation arm 233 and the lower extension radiation arm 234 are at an obtuse angle of 135 or less. It is provided that the horizontal radiation arm 241 and the lower extension radiation arm 242 are disposed at an obtuse angle of 135 or less, and the horizontal radiation arm 243 and the lower extension radiation arm 244 are at an obtuse angle of 135 or less. Settings.

In a specific embodiment of the embodiment, at least one pair of adjacent ones of the dipoles have a gap 2 between two adjacent ones of the radiating arms. As shown in FIG. 1, in an embodiment of a broadband dual-polarized antenna radiation device of the present application, between the radiation arm 21b of the dipole 21 and the radiation arm 22a of the dipole 22 With a gap 2, the radiating arm 21a of the dipole 21 is integrally formed with the radiating arm 24b of the dipole 24, and the radiating arm 22b of the dipole 22 is integrated with the radiating arm 23a of the dipole 23. Formed, the radiating arm 23b of the dipole 23 is integrally formed with the radiating arm 24a of the dipole 24.

Further, in another embodiment of a broadband dual-polarization radiation device not shown in the present application, the radiation arm 21b of the dipole 21 and the radiation arm 22a of the dipole 22 have a gap 2, a gap 2 between the radiating arm 22b of the dipole 22 and the radiating arm 23a of the dipole 23, the radiating arm 21a of the dipole 21 and the radiating arm of the dipole 24 The 24b is integrally formed, and the radiating arm 23b of the dipole 23 is integrally formed with the radiating arm 24a of the dipole 24.

It can be understood that, among the two adjacent dipoles, whether there is a gap between the radiation arm of one dipole and the radiation arm of the other dipole is integrated, which can be reasonably made according to actual needs. Adjustment.

The above-mentioned partial radiating arms are independently arranged, so that the two radiating arms of the partial dipoles have an asymmetric structure, so that the broadband dual-polarized antenna radiating device has an asymmetric structure as a whole, and the loading branch is arranged on the radiating arm. The resonant current path on the dipole can be effectively broadened, and the effect of reducing the aperture of the broadband dual-polarized radiation device and reducing the overall height of the broadband dual-polarized radiation device can be achieved, thereby realizing miniaturization of the radiation device, and Conducive to the miniaturization of the antenna.

Specifically, in the adjacent two radiating arms having a gap, the lower extending radiating arm extends near the end of the gap 2 in a direction outward from the center of the base 1 to form a loading branch 3 which is perpendicular to the loading branch 3 The plane in which the lower extending radiation arm is located.

As shown in FIG. 1, there is a gap between the radiating arm 21b of the dipole 21 and the radiating arm 22a of the dipole 22, and the lower extending radiating arm 214 on the radiating arm 21b is close to the gap 2. The end extends in an outward direction of the center of the base 1 to form a loading branch 31 perpendicular to the lower extending radiating arm 214, and the lower extending radiating arm 222 on the radiating arm 22a extends in a direction outward from the center of the base 1 to form a vertical The loading branch 32 of the extended radiating arm 222 is described.

The loading branch 3 further adds a surface high frequency current path that is greater than the connected dipoles at a limited physical size.

The broadband polarized radiation device 100 utilizes the arrangement of the radiating arms with gaps between adjacent dipoles and sets the loading branch 3 on the radiating arms, effectively widening the resonant current path on the dipole, which can be realized The effect of reducing the overall height of the broadband dual polarized radiation device 100 is reduced by reducing the aperture of the broadband dual polarized radiation device.

Specifically, the distance from the end of the loading branch 3 to the base 1 to the base 1 is less than 0.1 times the wavelength of the center frequency of the working frequency band to achieve an optimal design of the circuit index of the feeding port.

Specifically, each of the baluns includes two balun arms arranged side by side and coplanar with the gaps, and the two balun arms are respectively connected to the corresponding lower extension radiating arms, and the opposite sides of the two balun arms The step 4 is formed to extend from the bottom to the top, and the gap above the step 4 is larger than the gap below the step 4. In a preferred embodiment of the present application, a gap that increases from bottom to top is formed between the two balun arms of the same balun. The communication of each of the lower extension radiant arms with the closest balun thereof causes the surface high frequency current path of the dipole corresponding to each of the lower extension radiant arms to be lengthened under a limited physical size, thereby reducing the The physical dimensions of the radiating surface of the broadband dual polarized radiation device 100. The presence of the step 4 adjusts the gap between the two balance arms (the co-planar balun arms), thereby adjusting the coupling amount between the two balance arms, further realizing the circuit index of the current feed port. Optimal design.

Taking the balun 11 in Fig. 1 as an example, the balun 11 has two

balun arms

11a and 11b arranged side by side and coplanar with a gap. The

balun arms

11a and 11b are connected to the dipoles 21 and thus to the lower

extension radiating arms

212, 214, respectively. In another embodiment of the present application, the balun arm 11a is directly coupled to the lower extending radiating arm 212, and the balun arm 11b is directly coupled to the lower extending radiating arm 214.

Specifically, a power feeding port (not shown, the same below) for feeding the dipole is provided on the balun, and the feeding port is located below the step 4.

Specifically, the balun extends upward from the base 1 at an acute angle of not less than 45° with the base 1. In the present application, controlling the extension angle of each structure also facilitates control of miniaturization of the overall device.

As shown in FIG. 3, the broadband dual-polarization radiation device 100 further includes a parasitic unit 5 disposed in an octagonal structure surrounded by inner side edges of the horizontal arms of the four dipoles. . The parasitic unit 5 is disposed on the base through the support member 6. The parasitic unit 5 is coupled to the end of each of the lower extending radiating arms and the end of the loading branch 3, thereby effectively adjusting the coupling gap and The size can be adjusted to adjust the feed port S parameters, thereby achieving optimal design of circuit indicators.

Specifically, the distance between the edge of the parasitic unit 5 and each of the lower extending radiating arms is less than 10 mm to achieve an optimal design of the circuit index of the feeding port.

Specifically, the height of the parasitic unit 5 relative to the base 1 is 0.1-0.15 times the wavelength of the center frequency of the working frequency band to achieve an optimal design of the circuit index of the feed port.

Specifically, the parasitic unit 5 is fixed to the base 1 by the support member 6 made of an insulating medium; or the parasitic unit 5 is fixed to the base 1 by the support member 6 made of metal. .

Specifically, when the support member 6 is made of a metal material, the support member 6 is integrally molded with the parasitic unit 5 to reduce assembly time and improve production efficiency. As shown in FIG. 4, when the support member 6 is made of metal, it is integrally formed with the parasitic unit 5, and the parasitic unit 5 is electrically connected to the base 1.

As shown in FIG. 5, the support member 6 can be integrally molded with the base 1, thereby greatly improving production efficiency and saving production cost. The parasitic unit 5 is directly placed on the support member 6, and is pressed and fixed. Yes, to reduce assembly time and increase production efficiency.

Meanwhile, the present application also provides a broadband dual-polarized antenna. The broadband dual-polarized antenna includes the broadband dual-polarized radiation device of any of the above.

The technical solutions provided by the present application are described in detail above. For those skilled in the art, according to the idea of the embodiments of the present application, there are some changes in the specific implementation manners and application scopes. The contents of the description should not be construed as limiting the application.

Claims

A broadband dual-polarization radiation device, comprising: a base, four baluns connected to the base, and four dipoles corresponding to four top ends of the balun; each of the The dipole includes two radiating arms disposed at an angle, each of the radiating arms including a horizontal radiating arm and a lower extending radiating arm extending downwardly along an inner side of the horizontal radiating arm, and the four dipoles The plane surrounded by the outer edges of each of the horizontal radiating arms is quadrangular, and the planes of the inner edges of the horizontal radiating arms of the four dipoles are octagonal.
The broadband dual polarized radiation device according to claim 1, wherein at least one pair of adjacent said dipoles have a gap between two adjacent said radiating arms.
The broadband dual-polarization radiation device according to claim 1, wherein said horizontal radiating arm is disposed at an obtuse angle of 135 or less between said horizontally extending radiating arm extending downwardly along an inner side thereof.
The broadband dual-polarization radiation device according to claim 2, wherein an end of two adjacent said radiating arms having a gap is provided with a loading branch, said loading branch being perpendicular to a plane of said radiating arm.
The broadband dual-polarization radiation device according to claim 4, wherein the distance from the end of the loading branch to the base is less than 0.1 times the wavelength of the center frequency of the operating band.
The broadband dual-polarization radiation device according to claim 1, further comprising a parasitic unit disposed in said octagonal structure, said parasitic unit being disposed on said base by a support member.
The broadband dual-polarization radiation device according to claim 6, wherein a distance between an edge of the parasitic unit and the lower extending radiation arm is less than 10 mm.
The broadband dual-polarization radiation device according to claim 6, wherein the height of the parasitic unit relative to the base is 0.1-0.15 times the wavelength of the center frequency of the operating band.
The broadband double-polarized radiation device according to claim 6, wherein said parasitic unit is fixed to said base by said support member made of an insulating medium or metal.
The broadband dual polarized radiation device according to claim 6, wherein said parasitic unit is integrally formed with said support member.
The broadband dual-polarization radiation device according to claim 6, wherein said support member is integrally formed with said base, said balun and said dipole.
The broadband dual-polarized radiation device according to claim 1, wherein each of said baluns comprises two balun arms arranged side by side and coplanar with each other, and said two of said balun arms respectively correspond to The lower extending radiating arms are connected, and the opposite sides of the two balun arms extend from bottom to top to form a stepped structure and a gap which increases from bottom to top is formed between the two of the balun arms.
The broadband dual-polarization radiating device according to claim 12, wherein said balun is provided with a feeding port for feeding said dipole, said feeding port being located below said step .
The broadband dual-polarized radiation device according to claim 1, wherein said balun extends upward from said base at an acute angle of not less than 45 with said base.
A broadband dual-polarized antenna comprising the broadband dual-polarized radiation device of any one of claims 1 to 14.