CN210468133U

CN210468133U - 5G array antenna

Info

Publication number: CN210468133U
Application number: CN201921453346.1U
Authority: CN
Inventors: 吴泽海; 吴壁群; 苏振华; 张劭
Original assignee: Guangdong Broadradio Communication Technology Co Ltd
Current assignee: Guangdong Broadradio Communication Technology Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-05-05
Anticipated expiration: 2029-09-03

Abstract

The utility model relates to a 5G array antenna, including at least one subarray, every subarray integration has a radiating element array, at least one merit to divide ware and a looks ware; the radiation unit array comprises a column of a plurality of radiation units; the output end of the power divider is electrically connected with at least two adjacent radiation units; the phase shifter comprises two transmission lines, each transmission line comprises an input end and a plurality of output ends; and the radiation unit array, the power divider, the strip transmission line of the phase shifter and the metal wall in the subarray are of an injection molding integrated structure, and the surface is subjected to electroplating treatment after laser etching. According to the technical scheme, the functional components of the 5G array antenna are of the integrated processing and forming new structure, and the installation and welding of the components are simplified, so that the production consistency of the 5G array antenna is improved, the cost is reduced, and the production efficiency is improved.

Description

5G array antenna

Technical Field

The utility model belongs to the technical field of the communication technology and specifically relates to a 5G array antenna is related to.

Background

In a 5G mobile communication system, antennas on the base station side use large-scale antenna technology to increase system capacity. The 5G large-scale array antenna has good 3D beam forming capability, can realize deep coverage in the horizontal direction and the vertical direction, improves the frequency spectrum resource efficiency in multiples, and forms dynamic targeted network coverage. To achieve this goal, a 5G large-scale antenna should have more radiating elements (64) and more radio frequency transmit receive channels (64) than a conventional array antenna.

The utility model discloses the people finds in studying, the extensive antenna of 5G of prior art, if the Ding jin Kai in patent CN109149128A and Liu Cuo in patent CN108808244A each functional unit such as radiating element array, merit branch calibration network, wave filter and metal separator that it contains all independently processes respectively, and the assembly of rewelding, especially radiating element include irradiator and feed piece two at least components such as, and the production equipment process need weld the PCB merit one by one and divide the network, and is very consuming time. Because the frequency band of the 5G system is higher than that of the 4G system, along with the increase of frequency, the precision requirement of performance consistency on the size of the antenna system part is increased, the processing and assembling difficulty of the traditional PCB oscillator and die-casting oscillator process is increased, and the production cost is increased. Therefore, in order to promote the development of the new generation of mobile communication technology, it is necessary to develop an antenna structure with high integration, simple structure and easy assembly.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide an array antenna, in which the functional components of the array antenna adopt a new structure formed by integrated processing, so as to simplify the installation and welding of the components, thereby improving the production consistency of the 5G array antenna, reducing the cost, and improving the production efficiency.

A5G array antenna comprises at least one sub array, wherein each sub array is integrated with a radiating element array, at least one power divider, a phase shifter and/or at least one filter; the radiation unit array comprises a column of a plurality of radiation units; the output end of the power divider is electrically connected with at least two adjacent radiation units;

said phase shifter comprises an input and a plurality of outputs, and said filter comprises an input and an output; the phase shifter comprises four parts, namely a strip transmission line, a sliding medium, a metal wall and a metal cover plate, and the filter comprises three parts, namely a transmission line, a metal wall and a metal cover plate; the radiation unit array, the power divider, the strip transmission line and the metal wall of the phase shifter and/or the transmission line and the metal wall of the filter in the subarray are of an injection molding integrated structure, and surface electroplating treatment is carried out after laser etching.

Each radiation unit comprises a dual-polarized radiation oscillator, and the output end of the power divider is electrically connected with the oscillators in the same polarization direction of two to three adjacent radiation units.

The subarray also comprises a substrate and is integrated with the subarray.

The sub-array comprises phase shifters and no filter;

the oscillator in the radiation unit shares the substrate and the metal reflecting surface which are supported with the microstrip transmission line of the power divider and is positioned above the metal reflecting surface, the strip transmission line and the metal wall of the phase shifter are positioned below the metal reflecting surface, and the output end of the phase shifter is electrically connected with the input end of the power divider.

The strip transmission line, the metal wall, the vibrator in the radiation unit and the power divider of the phase shifter are of an integrated structure.

The metal cover plate of the phase shifter is welded or screwed to form a closed structure with the metal wall, and the medium can move in the middle of the closed structure of the phase shifter.

The sub-array includes a filter and no phase shifter therein;

the oscillator of the radiation unit and the circuit of the power divider are positioned above the metal reflecting surface, the metal wall of the filter and the transmission line are positioned below the metal reflecting surface, and the output end of the filter is electrically connected with the input end of the power divider.

The filter metal wall, the transmission line, the vibrator and the power divider are of an integrated structure.

The sub-array simultaneously comprises a phase shifter and a filter;

the radiation units of the subarray and the circuits of the power divider are located above the metal reflecting surface, the phase shifter and the filter are located below the metal reflecting surface, the output end of the phase shifter is electrically connected with the input end of the power divider, and the input end of the filter is electrically connected with the input end of the phase shifter.

The number of radiating elements of the sub-array is 12, and the number of the sub-arrays is 8.

The utility model discloses a combine together integrated design and plastics selectivity electroplating process in extensive array antenna, the microstrip transmission line of ware is divided to the merit, move looks ware and/or wave filter partial structure all can form with radiating element array integration, and a plurality of subarray rethread splice into big array. The production efficiency is improved, the cost of a large-scale antenna can be reduced, the Massive MIMO antenna is suitable for a 5G system frequency band, and an economical and practical solution is provided for large-scale deployment of a 5G mobile communication system.

Drawings

Fig. 1 is a schematic diagram of a radiating element in a 5G array antenna according to the present invention;

fig. 2 is a schematic diagram of a radiation plane of a sub-array in an embodiment of the present invention, fig. 2a is a partial schematic diagram of a radiation unit and a power divider, and fig. 2b is a schematic diagram of a connection line between a vibrator of the radiation unit and the power divider;

fig. 3 is a schematic view of an integrated structure of a radiating element, a power divider, a phase shifter transmission line, and a metal wall;

FIG. 4 is a diagram illustrating an overall structure of the radiation unit, the power divider, and the phase shifter;

FIG. 5 is a schematic diagram of another integrated structure of a radiating element, a power divider, a phase shifter transmission line and a metal wall

FIG. 6 is a schematic diagram of another radiation unit, power divider and phase shifter;

fig. 7 is a schematic view of an integrated structure of a radiating element, a power divider, a filter metal wall, a transmission line and a medium;

fig. 8 is an overall view of the radiation unit, power divider, and filter;

fig. 9 is a schematic view of an integrated structure of a radiation unit, a power divider, a phase shifter and a filter;

fig. 10 is a schematic diagram of the overall structure of the radiation unit, the power divider, the phase shifter and the filter.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanying the drawings are described in detail below. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

The embodiment of the utility model provides an embodiment provides a 5G array antenna, including at least one subarray, every subarray is integrated with a radiating element array, at least one merit and move looks ware; the radiation unit array comprises a column of a plurality of radiation units; the output end of the power divider is electrically connected with at least two adjacent radiation units; the phase shifter comprises an input end and a plurality of output ends, and the output ends are electrically connected with the input end of the power divider; the phase shifter comprises four parts, namely a strip transmission line, a sliding medium, a metal wall and a metal cover plate; the radiation unit array in the subarray, the power divider, the strip transmission line of the phase shifter and the metal wall are formed in one step through injection molding, and surface electroplating treatment is carried out after laser etching.

Example 1

Referring to fig. 1, the antenna array 1 of this embodiment includes 96 radiation elements 201, each of which is composed of 12 rows and 8 columns, the radiation elements 201 of each sub-array 11 are arranged in a straight line, and each radiation element 201 includes two radiation elements polarized at ± 45 degrees, which are orthogonal to each other. The 8 sub-arrays are parallel to each other and the first element units of each column are aligned with each other.

As shown in fig. 2, each sub-array includes 4 radiating element groups 12, each radiating element group includes 3 dual-polarized radiating elements 201 and 2 3-way power dividers 202, the lines of the power dividers and the oscillators share a substrate 203 for supporting, the dual-polarized oscillators are located above the substrate, the lines of the power dividers are located on the upper layer of the substrate, and the metal reflective surfaces are located on the bottom layer of the substrate.

In addition to the radiating element and the power divider, in the embodiment of the present invention, the phase shifter assembly is also integrated with the sub-array. Furthermore, the metal wall of the phase shifter, the strip transmission line and the metal reflecting surface of the substrate are integrally processed. And later-stage assembly of parts such as a sliding medium and a metal cover plate of the phase shifter, wherein the medium part can move inside to realize adjustment of a downward inclination angle of a vertical plane of the sub-array radiation beam, and the metal cover plate and the metal wall on the outermost side are fixed to form a closed structure. Specifically, as shown in fig. 3, the dual-polarized oscillator 201 is located above the substrate 203, and the metal reflective surface is located at the bottom layer of the substrate. Three metal walls 204 perpendicular to the metal reflecting surface are arranged below the metal reflecting surface, a line of a strip transmission line 205 and a dielectric layer are arranged between every two metal walls, and the three metal walls 204 and the two strip transmission lines are all perpendicularly connected with the metal reflecting surface. The phase shifter comprises two independent power distribution phase shift networks, each power distribution phase shift network comprises an input end and a plurality of output ends, and the number of the output ends is equal to the number of radiating element groups in the sub-array.

As shown in fig. 3 and 4, the strip transmission line, the metal wall, the vibrator, and the power divider of the phase shifter are integrated, the vibrator is electrically connected to the output end of the power divider, and the input end of the power divider is electrically connected to the output end of the phase shifter through a probe or a via hole. The integrated structure is processed by injection molding, then is subjected to laser etching, and then is subjected to surface electroplating to etch metal parts such as a vibrator, a power divider microstrip transmission line, a metal reflecting surface, a phase shifter strip transmission line, a metal wall and the like. Complete subarrays as shown in fig. 4, the movable dielectric 207 is located between the metal wall 204 of the phase shifter and the transmission line 205, and after the cover 206 of the phase shifter is fixed to the metal wall 204, a complete closed structure is formed. A plurality of subarrays are spliced to form a large-scale array, and the embodiment of the utility model is suitable for a Massive MIMO system with 16 radio frequency channels.

The subarray structure with integrated phase shifter, oscillator and power divider has another form as shown in fig. 5 and 6, in which one metal wall 204 is perpendicular to the metal reflection surface, and the other metal wall 204 is parallel to the reflection surface, the lines and dielectric layers of the phase shifter strip transmission line 205 are located between the metal reflection surface and the parallel metal wall, and the movable sliding medium 207 is located between the metal reflection surface/the metal wall and the transmission line. The metal cover 206 of the phase shifter is perpendicular to the metal reflective surface and fixed to it to form a closed structure.

Example 2

The utility model discloses in embodiment 1 the phase shifter can also "replace" (not technically simple replacement, but antenna structure can only contain and move looks ware or wave filter, also can contain simultaneously and move looks ware and wave filter, and the present embodiment only illustrates the situation of wave filter) for the wave filter, its structure slightly differs with the aforesaid embodiment, to the radiating element group 12 that each power divider 202 is connected, the input and a wave filter electric connection of power divider, and is concrete, can be through metallized via hole or probe. Each radiating element group comprises at least two filters respectively corresponding to two polarized radio frequency channels. The structural schematic diagram part of which can be seen in fig. 7 and 8. Fig. 7 is a schematic diagram of an integrated structure, and the radiating element 201, the power divider 202, the substrate 203 and the metal reflective surface, and the filter metal wall 209 and the transmission line 208, as well as the dielectric, may be integrally formed by injection molding, laser etching and electroplating. The metal walls of the filter may be plated on the outer and/or inner sides as desired. Fig. 8 is a structure diagram of the whole subarray, and a metal cover plate 210 of the filter is connected with the metal wall 209 to form a closed structure. This embodiment is suitable for Massive MIMO antennas larger than or equal to 32 radio frequency channels.

Example 3

In this embodiment, embodiments 1 and 2 are combined, that is, each row of sub-array radiating elements is electrically connected to the phase shifter through the power divider and then electrically connected to the filter. As shown in fig. 9, the phase shifter metal wall 204 and the strip transmission line 204, the metal wall 209 and the transmission line 208 of the filter, the antenna element 201 and the power divider 202 are integrally molded by injection molding, laser etching and electroplating. As shown in fig. 10, the sliding medium 207, the metal cover 206, and the filter metal cover 210 of the phase shifter are fixed at a later stage, and the integration of the formed sub-array is further improved. Therefore, the masive MIMO antenna with 16 radio frequency channels is formed, the consistency can be further improved, the production efficiency is improved, and the cost is reduced.

The utility model discloses a combine together integrated design and plastics selectivity electroplating process in extensive array antenna, the ware is divided to the merit, moves looks ware or wave filter part and all can form with the radiating element array integration, has not only improved production efficiency, also can reduce the cost of extensive antenna simultaneously, is fit for being used for the Massive MIMO antenna of 5G system frequency channel, provides an economy and practical solution for large-scale deployment 5G mobile communication system

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A5G array antenna is characterized by comprising at least one sub-array, wherein each sub-array is integrated with a radiating element array, at least one power divider, a phase shifter and/or at least one filter;

the radiation unit array comprises a column of a plurality of radiation units; the power divider is of a microstrip line structure, a circuit of the power divider is positioned on the upper layer of a horizontally placed substrate, and the bottom layer of the substrate is a metal reflecting surface; the radiation unit array is fixed above the substrate and shares a metal reflecting surface with the power divider; the output end of the power divider is electrically connected with at least two adjacent radiation units;

said phase shifter comprises an input and a plurality of outputs, and said filter comprises an input and an output; the phase shifter comprises four parts, namely a strip transmission line, a sliding medium, a metal wall and a metal cover plate, and the filter comprises three parts, namely a transmission line, a metal wall and a metal cover plate; the radiating element array, the substrate, the strip transmission line and the metal wall of the phase shifter, and/or the transmission line and the metal wall of the filter in the sub-array are of an integrated structure.

2. The 5G array antenna according to claim 1, wherein the integrated structure can be formed by one-time injection molding, laser etching and surface plating, and can form a metal wall and a strip transmission line of a radiation unit, a power divider, a phase shifter, and/or a metal wall and a metal part of a transmission line of a filter.

3. The 5G array antenna according to claim 1, wherein each of the radiating elements comprises a dual-polarized antenna element, and the output end of the power divider is electrically connected to the antenna elements of two to three adjacent radiating elements in the same polarization direction.

4. The 5G array antenna of claim 3, wherein the sub-arrays include phase shifters therein without filters;

the circuit of the antenna oscillator and the power divider is located above the metal reflecting surface, the strip transmission line, the metal wall, the medium and the metal cover plate of the phase shifter are located below the metal reflecting surface, the phase shifter comprises two independent strip transmission lines, each strip transmission line is provided with an input end and a plurality of output ends, and the output ends of the strip transmission lines are electrically connected with the input ends of the power divider.

5. The 5G array antenna according to claim 4, wherein the strip transmission line of the phase shifter and the metal wall, the antenna element and the power divider are of an integrated structure, and the phase shifter, the antenna element and the power divider share a metal reflecting surface.

6. The 5G array antenna according to claim 5, wherein the metal cover plate of the phase shifter forms a closed structure with the metal wall by welding or screw fastening, and the sliding medium is movable in the middle of the closed structure of the phase shifter.

7. The 5G array antenna of claim 3, wherein the sub-arrays include filters therein without phase shifters;

the circuit of the antenna oscillator and the power divider is located above the metal reflecting surface, the metal wall of the filter and the transmission line are located below the metal reflecting surface, and the output end of the filter is electrically connected with the input end of the power divider.

8. The 5G array antenna of claim 7, wherein the metal wall of the filter, the transmission line, the antenna element and the power divider are of an integrated structure, and the metal reflecting surface is shared by the filter, the antenna element and the power divider.

9. The 5G array antenna of claim 3, wherein the sub-arrays contain both phase shifters and filters;

the lines of the antenna oscillator and the power divider of the subarray are positioned above the metal reflecting surface, the phase shifter and the filter are positioned below the metal reflecting surface, the output end of the phase shifter is electrically connected with the input end of the power divider, and the input end of the filter is electrically connected with the input end of the phase shifter; the phase shifter strip transmission line, the metal wall, the transmission line of the filter, the metal wall, the antenna oscillator and the power divider are of an integrated structure, and the phase shifter, the filter, the antenna oscillator and the power divider share a metal reflecting surface.

10. The 5G array antenna of claim 1, wherein the number of radiating elements of the sub-array is 12, and the number of the sub-arrays is 8.