WO2023123739A1

WO2023123739A1 - Multi-branch ultra-wideband radiation unit and antenna

Info

Publication number: WO2023123739A1
Application number: PCT/CN2022/086853
Authority: WO
Inventors: 赖言罕; 吴壁群; 陈杰; 张鹏
Original assignee: 广东博纬通信科技有限公司
Priority date: 2021-12-28
Filing date: 2022-04-14
Publication date: 2023-07-06
Also published as: CN114284703B; CN114284703A

Abstract

The present invention relates to a multi-branch ultra-wideband radiation unit and an antenna. The radiation unit comprises a radiator, and a feed piece assembly and a directing piece assembly that are mounted on the radiator; the radiator comprises a balun structure, a first radiation arm assembly, and a second radiation arm assembly, the inner ends of the first radiation arm assembly and the second radiation arm assembly being respectively connected to the balun structure, and the second radiation arm assembly being located below the first radiation arm assembly; the first radiation arm assembly comprises four orthogonally arranged first radiation arm branches, and every two of the four first radiation arm branches are paired to form a first dipole radiation arm; the second radiation arm assembly comprises four orthogonally arranged second radiation arm branches, and every two of the four second radiation arm branches are paired to form a second dipole radiation arm. The present invention is simple in structure, can be integrally formed, is high in integration level and beneficial to improve the production efficiency, and has an ultra-wideband radiation characteristic. Compared with conventional antenna systems, the utilized bandwidth is effectively widened, and the integration and sharing of an antenna system are facilitated.

Description

A multi-branch ultra-wideband radiation unit and antenna

technical field

The invention relates to the technical field of mobile communication, in particular to a multi-node ultra-broadband radiation unit and an antenna.

Background technique

With the advent of 5G commercial use, the pace of 5G mobile communication network construction is also gradually accelerating. The demand for 5G mobile communication equipment by major operators is becoming more and more urgent. As the throat of mobile communication, the research and development of base station antennas are also appears to be particularly important. Today, 4G LTE network construction has tended to be perfect, and 5G network construction is still in its infancy. Therefore, it will face a situation of long-term coexistence of 4G and 5G, and the demand for 4G&5G integrated antennas will emerge as the times require. Before the commercialization of 5G mobile communications, major base station antenna manufacturers focused their research on Massive MIMO active antennas in order to quickly respond to and match the needs of 5G communication networks, while there were relatively few studies on passive antennas for 4G&5G integration. The 4G&5G fusion antenna not only has multiple systems with different frequency bands existing at the same time, but also faces the simultaneous existence of systems with two different working modes, FDD and TDD. The construction cost and the difficulty of antenna research and design have increased significantly.

According to the 5G spectrum announced by China's three major operators, the 2.4GHz frequency band and the 3.5GHz frequency band will be used as the general spectrum of 5G. The requirements for 4G&5G fusion antennas that can cover the 2.3-3.8GHz frequency band have been put forward, but the multi-frequency and multi-system antennas used in the existing 4G mobile communications have not yet been designed for 2.3-3.8GHz, and with the development of 5G systems Integrating, the antenna radiation performance is bound to be more severely restricted.

Contents of the invention

The purpose of the present invention is to provide a radiation unit that can cover the 2.3-3.8GHz frequency band and is suitable for ultra-wideband in 4G&5G fusion antennas. The radiation unit can cover two frequency bands of 2.3-2.7GHz and 3.3GHz-3.8GHz, and is compatible with FDD And the TDD working mode, by adding the radiation stub device of the corresponding frequency band, it can be better applied to the multi-frequency antenna system, and the independence of the electrical performance of each frequency band is guaranteed.

For realizing the purpose of the present invention, adopt following technical scheme:

In the first aspect, the present invention proposes a multi-node ultra-broadband radiation unit, the radiation unit includes a radiator, a feeder assembly and a guide sheet assembly installed on the radiator; the radiator includes a balun structure , a first radiating arm assembly and a second radiating arm assembly, the inner ends of the first radiating arm assembly and the second radiating arm assembly are respectively connected to the balun structure, and the second radiating arm assembly is located at the first Below the radial arm assembly.

A further improvement is that the first radiating arm assembly includes four first radiating arm branches arranged orthogonally, and two pairs of the four first radiating arm branches form a first dipole radiating arm; The second radiating arm assembly includes four second radiating arm branches arranged orthogonally, and two pairs of the four second radiating arm branches form a second dipole radiating arm.

A further improvement is that the length of the first radiating arm branch is 1/8-1/4 times the wavelength of 2.3GHz-2.7GHz, and the length of the second radiating arm branch is 1/4 of the wavelength of 3.3GHz-3.8GHz. 8-1/4 times.

A further improvement is that the first radiating arm branch includes a long radiating arm, one end of the long radiating arm is connected to the balun structure, and the other end is bent vertically downward to form a short radiating arm.

A further improvement is that hollow holes are provided on the first radiating arm branches.

A further improvement is that the four second radiating arm branches are arranged one by one directly under the four first radiating arm branches, and the size of the hollow hole is larger than the size of the second radiating arm branch.

A further improvement is that the balun structure is a hollow structure with an open top, and the feed sheet assembly includes a feed sheet holder, a first feed sheet and a second feed sheet distributed across, and the feed sheet The deck is installed in the position of the hollow structure, and the first feeder and the second feeder are installed inside the feeder deck, and are connected to the external circuit through the radiator feeder port at the bottom of the balun structure. feed.

A further improvement is that the guide piece assembly includes a guide piece holder and a first guide piece, the guide piece holder is installed above the radiator, and the guide piece holder passes through the first guide piece. The support column is installed with the first guide piece.

A further improvement is that the guide piece assembly further includes a second guide piece, the second guide piece is installed on the first guide piece through a second support column, and the size of the second guide piece is smaller than The size of the first guide piece.

In a second aspect, the present invention provides an antenna, including the multi-twig ultra-broadband radiation unit described in any one of the above.

Beneficial effects of the present invention:

The invention has a simple structure, can be integrally formed, has a high degree of integration, is conducive to improving production efficiency, and has ultra-wideband radiation characteristics, effectively widening the bandwidth of use. Compared with conventional antenna systems, the utilization rate of radiation units is improved and the degree of integration is higher. High, which makes the design of the antenna system more concise, and is conducive to the integration and sharing of the antenna system.

The diameter of the radiation unit of the invention is between 0.35 times the wavelength and 0.55 times the wavelength, and the dual-frequency radiation performance is integrated, which not only facilitates the realization of a miniaturized antenna, but also saves materials and reduces costs.

The invention is suitable for 2300-3800MHz communication system, and can form multi-frequency multi-system antenna with 700-2300MHz communication system.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a multi-branch ultra-broadband radiation unit of the present invention;

Fig. 2 is a schematic diagram of the structure of a multi-branch ultra-broadband radiation unit of the present invention after the guide plate assembly is separated from the radiator;

Fig. 3 is an explosion diagram of a multi-branch ultra-broadband radiation unit of the present invention;

Fig. 4 is a schematic diagram of the radiator structure of a multi-branch ultra-broadband radiation unit of the present invention;

Fig. 5 is a schematic diagram of another viewing angle of the radiator of a multi-twig ultra-broadband radiation unit according to the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so the drawings only show the configurations related to the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that when an element is referred to as being “mounted on” another element, it can be directly on the other element or there can also be an intervening element. When an element is said to be "connected" to another element, it may be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the terms "and", "and" include any and all combinations of one or more of the associated listed items.

Please refer to accompanying drawings 1 to 5. The first aspect of the embodiment of the present invention provides a multi-branch ultra-broadband radiation unit with a height of 0.25 to 0.3 times the wavelength of the center frequency of 2.3 to 3.8 GHz. The radiator 1000 achieves an ultra-wideband effect and can be used in a multi-frequency antenna system.

Specifically, as shown in FIG. 1 , in this embodiment, the radiating unit includes a radiator 1000 and a feed sheet assembly and a guide sheet assembly installed on the radiator 1000; the radiator 1000 includes a bar Lun structure, a first radiating arm assembly 1020 and a second radiating arm assembly 1010, the inner ends of the first radiating arm assembly 1020 and the second radiating arm assembly 1010 are respectively connected to the balun structure, and the second radiating arm The component 1010 is located below the first radiating arm component 1020 to form a two-layer radiating arm, and the radiating body 1000 has a hollow double-layer "T"-shaped structure as a whole.

As shown in FIG. 5 , four ground fixing post assemblies 1030 are provided at the bottom of the radiator 1000 , and the ground fixing post assembly 1030 includes four

fixing posts

1031 , 1032 , 1033 , and 1034 .

As shown in FIG. 4 , the first radiating arm assembly 1020 includes four first

radiating arm branches

1021 , 1022 , 1023 , 1024 arranged orthogonally, and the four first

radiating arm branches

1021 , 1022 , 1023 , In 1024, paired in pairs to form the first dipole radiation arm, forming the upper layer "T" type dual polarization radiation unit.

As shown in FIG. 4, the second radiating arm assembly 1010 includes four second

radiating arm branches

1011, 1012, 1013, 1014 arranged orthogonally, and the four second radiating

arm branches

1011, 1012, 1013, In 1014, paired in pairs to form the second dipole radiating arm, forming the lower "T" type dual-polarized radiating unit.

The lengths of the first

radiating arm branches

1021 , 1022 , 1023 , 1024 are longer than the lengths of the second

radiating arm branches

1011 , 1012 , 1013 , 1014 .

Specifically, the length of the first

radiating arm branches

1021, 1022, 1023, 1024 is 1/8-1/4 times the wavelength of 2.3GHz-2.7GHz, and the length of the second

radiating arm branches

1011, 1012, 1013, 1014 The length is 1/8-1/4 times of the wavelength of 3.3GHz～3.8GHz.

In other embodiments of the present invention, each of the first

radiating arm branches

1021, 1022, 1023, 1024 includes a long radiating arm, one end of the long radiating arm is connected to the balun structure, and the other end Bending vertically downwards to form short radiation arms. In this embodiment, the short radiation arms are formed by bending, which can be used to reduce the projected area of the first radiation arm assembly 1020 on the second radiation arm assembly 1010, which can reduce the impact on the second radiation arm assembly. The influence of the assembly 1010 saves space and facilitates the integral molding of the radiation unit.

As shown in FIG. 4 , in some other embodiments of the present invention, each of the first

radiating arm branches

1021 , 1022 , 1023 , 1024 is provided with a

hollow hole

1025 , 1026 , 1027 , 1028 . The four second

radiating arm branches

1011, 1012, 1013, 1014 are arranged one by one directly under the four first

radiating arm branches

1021, 1022, 1023, 1024, and the

hollow holes

1025, 1026, The size of 1027, 1028 is larger than the size of the second

radiating arm branches

1011, 1012, 1013, 1014, that is, the projection planes of the

hollow holes

1025, 1026, 1027, 1028 cover the second

radiating arm branches

1011, 1012, 1013, Hollow holes 1025 , 1026 , 1027 , and 1028 can be provided on the projection surface of 1014 to reduce interference to the second radiation arm assembly 1010 . Specifically, in this embodiment, the projection surfaces of the

hollow holes

1025, 1026, 1027, and 1028 are rectangular.

Specifically, as shown in FIG. 3 , in this embodiment, the balun structure is a hollow structure with an open top, and the feed sheet assembly includes a feed sheet holder 2000 and first feed sheets 3010 distributed across and the second feed sheet 3020, the feed sheet holder 2000 is installed in the hollow structure position, the feed sheet holder 2000 is square, and the feed sheet holder 2000 is provided with a feed sheet Card position, the first feed sheet 3010 and the second feed sheet 3020 are installed inside the feed sheet holder 2000 through the feed sheet clips, the first feed sheet 3010, the second feed sheet 3020 is in the shape of a fishhook, fixed inside the feeder holder 2000, and connected to the external circuit through the

radiator feeder ports

1041 and 1042 at the bottom of the balun structure for feeding.

Specifically, as shown in FIG. 3 , in this embodiment, the guide piece assembly includes a guide card 4000 and a first guide piece 5000 , and the guide card holder 4000 is installed on the radiator 1000 Above, the first guide piece 5000 is installed on the guide piece holder 4000 through the first support column 8000 . The first guide piece 5000 can be circular or square, with 4 fixing holes designed on it, which can be fixed on the guide piece holder 4000 with four first support columns 8000 .

Specifically, in some embodiments of the present invention, the guide holder 4000 is circular, and its bottom is designed with a buckle, which is fastened to the first

radial arm branches

1021, 1022, 1023, 1024 through the buckle. One side of the

hollow holes

1025, 1026, 1027, 1028, and one side of the

hollow holes

1025, 1026, 1027, 1028 are connected and fixed with buckles, so as to realize the fixing of the guide plate holder 4000. The

hollow holes

1025, 1026, 1027, 1028 can not only reduce the interference to the second radiation arm assembly 1010, but also provide a snap-fit position for the guide plate holder 4000, with a simple structure. It also saves materials and reduces costs.

Specifically, as shown in FIG. 3 , in some embodiments of the present invention, the guide piece assembly further includes a second guide piece 7000 , and the first guide piece 5000 is installed on the first guide piece 5000 through the second support column 6000 . The second guide piece 7000, preferably, the size of the second guide piece 7000 is smaller than the size of the first guide piece 5000.

Specifically, the central part of the first guide piece 5000 is designed with a circular hole, which can be used to place the second support column 6000. The second guide piece 7000 is circular or square. The second support One end of the post 6000 is connected to the central hole of the second guide piece 7000 , and the other end is connected to the circular hole of the first guide piece 5000 .

The second aspect of this embodiment provides an antenna, including the multi-twig ultra-broadband radiation unit described in any one of the above embodiments. For the structure of the radiating unit, refer to the above-mentioned embodiments, while the structures of other parts of the antenna belong to the common knowledge of those skilled in the art. Those skilled in the art can refer to the prior art, and this embodiment will not be described in detail here.

Beneficial effects of the embodiment of the present invention: the present invention is simple in structure, can be integrally formed, has a high degree of integration, is conducive to improving production efficiency, and has ultra-wideband radiation characteristics, effectively widening the use bandwidth. Compared with conventional antenna systems, the radiation The unit utilization rate is improved and the integration is higher, which makes the design of the antenna system more concise, which is conducive to the integration and sharing of the antenna system. The diameter of the radiation unit of the present invention is between 0.35 times the wavelength and 0.55 times the wavelength, and the integrated dual-frequency radiation performance not only facilitates the realization of a miniaturized antenna, but also saves materials and reduces costs. The invention is suitable for 2300-3800MHz communication systems, and can form multi-frequency multi-system antennas with 700-2300MHz communication systems.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only express the specific implementation manner of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

A multi-node ultra-broadband radiation unit is characterized in that the radiation unit includes a radiator and a feed sheet assembly and a guide sheet assembly installed on the radiator; the radiator includes a balun structure, a first A radiation arm assembly and a second radiation arm assembly, the inner ends of the first radiation arm assembly and the second radiation arm assembly are respectively connected to the balun structure, and the second radiation arm assembly is located at the first radiation arm assembly below.
The multi-node ultra-broadband radiating unit according to claim 1, wherein the first radiating arm assembly includes four first radiating arm branches arranged orthogonally, and the four first radiating arm branches paired in pairs to form the first dipole radiating arm; the second radiating arm assembly includes four orthogonally arranged second radiating arm branches, and two pairs of the four second radiating arm branches form the second dipole radiating arm assembly; Dipole radiating arms.
The multi-branch ultra-broadband radiation unit according to claim 2, characterized in that, the length of the first radiation arm branch is 1/8-1/4 times the wavelength of 2.3GHz-2.7GHz, and the second The length of the branch of the radiation arm is 1/8-1/4 times of the wavelength of 3.3GHz-3.8GHz.
The multi-branch ultra-broadband radiation unit according to claim 2, wherein the first radiation arm branch includes a radiation long arm, one end of the radiation long arm is connected to the balun structure, and the other end is vertical Bend down to form radiating short arms.
The multi-branch ultra-broadband radiation unit according to claim 2, characterized in that hollow holes are arranged on the branches of the first radiation arm.
The multi-branch ultra-broadband radiating unit according to claim 5, characterized in that, the four second radiating arm branches are arranged directly below the four first radiating arm branches one by one, and the The size of the hollow hole is larger than the size of the branch of the second radiating arm.
A multi-node ultra-broadband radiation unit according to any one of claims 1-6, wherein the balun structure is a hollow structure with an open top, and the feed sheet assembly includes a feed sheet holder , the first feed sheet and the second feed sheet distributed across, the feed sheet holder is installed in the hollow structure position, the first feed sheet and the second feed sheet are installed on the feed sheet The interior of the card holder is connected to the external circuit through the radiator feed port at the bottom of the balun structure for feeding.
A multi-twig ultra-broadband radiation unit according to any one of claims 1-6, characterized in that, the guide piece assembly includes a guide piece holder and a first guide piece, and the guide piece The card holder is installed above the radiator, and the first guide piece is installed on the guide piece holder through the first support column.
The multi-node ultra-broadband radiation unit according to claim 8, wherein the guide piece assembly further includes a second guide piece, and the first guide piece is installed on the first guide piece through a second support column. Two guide pieces, the size of the second guide piece is smaller than the size of the first guide piece.
An antenna, characterized by comprising the multi-twig ultra-broadband radiation unit according to any one of claims 1-9.