CN210926349U

CN210926349U - Large-scale array antenna and antenna module

Info

Publication number: CN210926349U
Application number: CN201922489825.5U
Authority: CN
Inventors: 段红彬; 李明超; 王钦源
Original assignee: Comba Telecom Technology Guangzhou Ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-03
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to an antenna module and extensive array antenna, divide network and calibration network including metal reflecting plate, first insulator, second insulator, feed merit. The metal reflecting plate is embedded between the first insulator and the second insulator, and the metal reflecting plate, the first insulator and the second insulator are integrally molded. The first insulator comprises an insulating bottom plate positioned on one side surface of the metal reflecting plate, and the feed power distribution network is arranged on the insulating bottom plate. The second insulator comprises an insulating cavity body positioned on the other side face of the metal reflecting plate, and the calibration network is arranged on the bottom wall of the insulating cavity body. With metal reflecting plate, first insulator and the integrated molding of second insulator three, then with the feed merit divide the network directly to locate on the insulating bottom plate to and on locating the diapire of insulating cavity directly with the calibration network, thereby can realize the antenna lightweight, simplify antenna structure simultaneously, promote antenna performance index, the assembly is simplified, is favorable to realizing automated production.

Description

Large-scale array antenna and antenna module

Technical Field

The utility model relates to a communication device technical field especially relates to a extensive array antenna and antenna module.

Background

With the rapid development of mobile communication technology and applications, the mobile communication technology (abbreviated as 5G in the foreign language) has entered the phase of trial business with respect to the fifth generation. In a conventional 5G antenna, an antenna module generally includes a metal base plate, a metal spacer disposed on the metal base plate, and a feeding network. The metal base plate is usually formed by metal die-casting or sheet metal technology, and the metal partition plate is usually formed by metal die-casting, aluminum profile pultrusion or sheet metal technology, so as to meet the requirement of the antenna based on the 5G large-scale dense high-frequency array on various layout spaces. However, in engineering practice, the metal partition plate is generally fixed on the metal base plate by screws or rivets or fixedly connected with the metal base plate by welding/metal die casting, and under the background of 5G high-frequency band application, it is difficult to meet the requirement of the 5G high-frequency band antenna on a radiation boundary gap by adopting a screw fixing mode, the insertion loss of the 5G antenna is high, intermodulation hidden danger is increased, the consistency is poor, and too much metal material is adopted, so that the problems of multiple antenna parts, heavy weight, complex assembly and the like are caused. In addition, the feed network is mostly integrated on the PCB, and the PCB is fixedly connected to the metal base plate by screws or rivets. The radiating unit usually adopts metal die-casting, panel beating or PCB oscillator, and the radiating unit is connected through coaxial cable welded connection with feed network through direct welding usually, and not only the assembly is complicated, and manufacturing cost is higher, still can have more solder joints, is difficult to satisfy the index requirement of low insertion loss, low intermodulation and high uniformity equally.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to overcome the defects of the prior art and provide a large-scale array antenna and an antenna module, which can achieve light weight of the antenna, simplify the structure of the antenna, and improve the performance index of the antenna.

The technical scheme is as follows: an antenna module, comprising: the metal reflecting plate is embedded between the first insulator and the second insulator, and the metal reflecting plate, the first insulator and the second insulator are integrally molded; the first insulator comprises an insulating bottom plate positioned on one side surface of the metal reflecting plate, and the feed power dividing network is arranged on the insulating bottom plate; the second insulator comprises an insulating cavity body located on the other side face of the metal reflecting plate, and the calibration network is arranged on the bottom wall of the insulating cavity body.

The antenna module does not need to form the feed power distribution network and the calibration network on two PCB plates respectively as in the traditional way, then adopts connecting pieces such as screws to assemble and combine the PCB plates of the feed power distribution network, the PCB plates of the calibration network and the metal reflecting plates, but integrates and molds the metal reflecting plates, the first insulators and the second insulators, then directly locates the feed power distribution network on the insulating bottom plate, and directly locates the calibration network on the bottom wall of the insulating cavity, thereby realizing the light weight of the antenna, simultaneously simplifying the antenna structure, improving the performance index of the antenna, simplifying the assembly and being beneficial to realizing the automatic production.

In one embodiment, the first insulator further includes a plurality of insulating isolation plates disposed on the insulating base plate at intervals, and a metal layer is disposed on the insulating isolation plates.

In one embodiment, the antenna module further includes a plurality of radiation units located between adjacent insulating isolation plates, where the radiation units are dipole pieces disposed on the insulating base plate, and the radiation units are electrically connected to the feed power distribution network.

In one embodiment, the antenna module further includes a guiding sheet disposed corresponding to the radiating element, the first insulator further includes a dielectric supporting column connected to the insulating base plate, the dielectric supporting column is disposed corresponding to the guiding sheet, and the guiding sheet is mounted on the dielectric supporting column; the guide sheet is a PCB or a metal sheet. Thus, the guide sheet can improve radiation performance.

In one embodiment, the feed power distribution network is formed on the insulating isolation board by using a 3D-MID technology, or is formed on the insulating isolation board by plating, or is formed on the insulating isolation board by using an LDS process; the calibration network is formed on the bottom wall of the insulation cavity by adopting a 3D-MID technology, or is formed on the bottom wall of the insulation cavity in a plating mode, or is formed on the bottom wall of the insulation cavity by adopting an LDS process; the radiation unit is formed on the insulating isolation plate by adopting a 3D-MID technology, or is formed on the insulating isolation plate by plating, or is formed on the insulating isolation plate by adopting an LDS process.

In one embodiment, the antenna module further includes a plurality of radiation units located between adjacent insulating isolation plates, the radiation units are radiation plates, the first insulator further includes a dielectric support pillar connected to the insulating base plate, the dielectric support pillar is disposed corresponding to the radiation plates, the radiation plates are mounted on the dielectric support pillar, a feed layer is disposed on a sidewall of the dielectric support pillar, and the radiation plates are connected to the feed power distribution network through the feed layer.

In one embodiment, the first insulator further comprises a boundary plate arranged around the circumference of the insulating base plate, and a metal layer is arranged on the plate surface of the boundary plate; the metal layer is formed on the boundary board by using a 3D-MID technology, or is formed on the boundary board by plating, or is formed on the boundary board by using an LDS process.

In one embodiment, the metal reflection plate is provided with a boundary plate disposed around a circumference of the insulating base plate.

In one embodiment, the antenna module further includes a plurality of feed probes, the metal reflector is provided with via holes disposed corresponding to the feed probes, the feed probes are disposed in the via holes, an insulating medium is filled in outer walls of the feed probes and inner walls of the via holes, one ends of the feed probes penetrate through the first insulator and then are electrically connected to the feed power distribution network, and the other ends of the feed probes penetrate through the second insulator and then are electrically connected to the calibration network.

In one embodiment, the outer side wall of the insulating cavity and the inner side wall of the insulating cavity are both provided with metal layers, and the metal layers on the outer side wall of the insulating cavity are electrically connected with the metal reflecting plate; or the inner side wall of the insulating cavity is provided with a metal layer, and the metal layer on the inner side wall of the insulating cavity is electrically connected with the metal reflecting plate through a metalized through hole.

In one embodiment, the antenna module further includes a metal shielding cover, an opening is provided on a cavity wall of the insulating cavity facing away from the first insulator, and the metal shielding cover is disposed at the opening.

A large-scale array antenna comprises more than one antenna module.

According to the large-scale array antenna, the feed power distribution network and the calibration network are not required to be formed on the two PCBs respectively as in the traditional mode, then the PCBs of the feed power distribution network, the PCBs of the calibration network and the metal reflecting plates are assembled and combined through the connecting pieces such as the screws, the metal reflecting plates, the first insulators and the second insulators are integrally molded, then the feed power distribution network is directly arranged on the insulating bottom plate, and the calibration network is directly arranged on the bottom wall of the insulating cavity, so that the light weight of the antenna can be realized, the antenna structure is simplified, the performance index of the antenna is improved, the assembly is simplified, and the automatic production is favorably realized.

Drawings

Fig. 1 is a view structure diagram of an antenna module according to an embodiment of the present invention;

fig. 2 is a view of another perspective structure of an antenna module according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating an antenna module according to an embodiment of the present invention;

fig. 4 is an exploded view of an antenna module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of the antenna module according to an embodiment of the present invention, in which the guide sheet is separated;

FIG. 6 is an enlarged schematic view of FIG. 5 at A;

fig. 7 is a schematic structural diagram of an antenna module according to an embodiment of the present invention, after a shielding cover plate is removed;

fig. 8 is an enlarged structural view at B of fig. 7.

Reference numerals:

10. a metal reflective plate; 20. a first insulator; 21. an insulating base plate; 22. an insulating separator plate; 23. a dielectric support post; 24. a boundary plate; 30. a second insulator; 31. an insulating cavity; 311. metallizing the via hole; 40. a feed power division network; 50. calibrating the network; 60. a radiation unit; 70. a guide sheet; 80. a metal shielding cover; 81. and (4) a mounting piece.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

In one embodiment, referring to fig. 1 to 6, an antenna module includes a metal reflection plate 10, a first insulator 20, a second insulator 30, a power distribution network 40, and a calibration network 50. The metal reflection plate 10 is embedded between the first insulator 20 and the second insulator 30, and the metal reflection plate 10, the first insulator 20, and the second insulator 30 are integrally molded. The first insulator 20 includes an insulating substrate 21 located on one side of the metal reflector 10, and the power distribution network 40 is disposed on the insulating substrate 21. The second insulator 30 includes an insulating cavity 31 on the other side of the metal reflector 10, and the calibration network 50 is disposed on the bottom wall of the insulating cavity 31.

According to the antenna module, the feeding power distribution network 40 and the calibration network 50 are not required to be formed on two PCBs respectively as in the traditional method, then the PCBs of the feeding power distribution network 40, the PCBs of the calibration network 50 and the metal reflecting plate 10 are assembled and combined by adopting connecting pieces such as screws, the metal reflecting plate 10, the first insulator 20 and the second insulator 30 are integrally molded, then the feeding power distribution network 40 is directly arranged on the insulating bottom plate 21, and the calibration network 50 is directly arranged on the bottom wall of the insulating cavity 31, so that the antenna is light in weight, the antenna structure is simplified, the antenna performance index is improved, the assembly is simplified, and the automatic production is facilitated.

It is understood that the metal reflector 10 can be used not only as a reflector, but also as a metal ground layer for the power distribution network 40 and the calibration network 50.

Further, referring to fig. 1, fig. 2, fig. 4 and fig. 6, the first insulator 20 further includes a plurality of insulating isolation plates 22 disposed on the insulating base plate 21 at intervals. The insulating isolation plate 22 is provided with a metal layer. Specifically, a metal layer is formed on the insulating isolation plate 22 by using a 3D-MID technique, or a metal layer is formed on the insulating isolation plate 22 by plating, or a metal layer is formed on the insulating isolation plate 22 by using an LDS (Laser-Direct-structuring) process. More than one radiation unit 60 and a feed network connected with the radiation unit 60 are arranged between two adjacent insulating isolation plates 22, the radiation unit 60 and the feed network form an antenna subarray, and the metal layer on the surface of the insulating isolation plate 22 is used for isolating the adjacent antenna subarrays. Therefore, the assembly is simple, the production is automatic, the cost is reduced, the product structure is simple, and the weight is light.

In one embodiment, referring to fig. 5 and 6, the antenna module further includes a plurality of radiating elements 60 located between adjacent insulating spacers 22. The radiation unit 60 is a dipole plate disposed on the insulating base plate 21, and the radiation unit 60 is electrically connected to the feed power distribution network 40.

Further, referring to fig. 5 and 6, the antenna module further includes a guiding sheet 70 disposed corresponding to the radiating element 60, specifically, the guiding sheet 70 is a PCB or a metal sheet. The first insulator 20 further includes a dielectric support column 23 connected to the insulating base plate 21, the dielectric support column 23 is disposed corresponding to the guiding sheet 70, and the guiding sheet 70 is mounted on the dielectric support column 23. In this manner, the guide sheet 70 can improve radiation performance. Specifically, the guiding sheet 70 is provided with a clamping hole, the end of the medium supporting column 23 is provided with a clamping head matched with the clamping hole, and the guiding sheet 70 is detachably clamped on the medium supporting column 23. In order to stably mount the guiding sheet 70 on the media supporting pillars 23, each guiding sheet 70 may correspond to two, three, four or more media supporting pillars 23.

In one embodiment, the feeding power distribution network 40 is formed on the insulating isolation plate 22 by using a 3D-MID technology, or formed on the insulating isolation plate 22 by plating, or formed on the insulating isolation plate 22 by using an LDS process; the calibration network 50 is formed on the bottom wall of the insulating cavity 31 by using a 3D-MID technology, or is formed on the bottom wall of the insulating cavity 31 by plating, or is formed on the bottom wall of the insulating cavity 31 by using an LDS process; the radiation unit 60 is formed on the insulating isolation plate 22 by using a 3D-MID technique, or formed on the insulating isolation plate 22 by plating, or formed on the insulating isolation plate 22 by using an LDS process. So, can realize the antenna lightweight, simplify antenna structure simultaneously, promote antenna performance index, the assembly is simplified, is favorable to realizing automated production.

In another embodiment, the antenna module further comprises a plurality of radiating elements 60 located between adjacent ones of the dielectric spacers 22. The radiation unit 60 is a radiation plate, the first insulator 20 further includes a dielectric support column 23 connected to the insulating base plate 21, the dielectric support column 23 is disposed corresponding to the radiation plate, the radiation plate is mounted on the dielectric support column 23, a feed layer is disposed on a side wall of the dielectric support column 23, and the radiation plate is connected to the feed power distribution network 40 through the feed layer. Specifically, the feed layer on the sidewall of the dielectric support pillar 23 is formed on the outer wall of the dielectric support pillar 23 by a 3D-MID technique, or formed on the outer wall of the dielectric support pillar 23 by plating, or formed on the outer wall of the dielectric support pillar 23 by an LDS process. So, can realize the antenna lightweight, simplify antenna structure simultaneously, promote antenna performance index, the assembly is simplified, is favorable to realizing automated production.

In one embodiment, referring to fig. 5 and 6, the first insulator 20 further includes a boundary plate 24 disposed around the circumference of the insulating base plate 21, and a metal layer is disposed on a plate surface of the boundary plate 24. The metal layer on the boundary plate 24 is formed on the boundary plate 24 using a 3D-MID technique, or is plated on the boundary plate 24, or is formed on the boundary plate 24 using an LDS process. Therefore, under the action of the boundary plate 24, the radiation pattern of the antenna can be optimized, and the performance index of the large-scale array antenna is improved.

In another embodiment, the metal reflection plate 10 is provided with a boundary plate disposed around the circumference of the insulation base plate 21. Therefore, under the action of the boundary plate, the radiation pattern of the antenna can be optimized, and the performance index of the large-scale array antenna is improved.

In an embodiment, the antenna module further includes a plurality of feeding probes, the metal reflection plate 10 is provided with via holes disposed corresponding to the feeding probes, the feeding probes are disposed in the via holes, outer walls of the feeding probes and inner walls of the via holes are filled with insulating media, one ends of the feeding probes penetrate through the first insulator 20 and then are electrically connected to the feeding power distribution network 40, and the other ends of the feeding probes penetrate through the second insulator 30 and then are electrically connected to the calibration network 50.

In an embodiment, referring to fig. 7 and 8, the outer sidewall of the insulating cavity 31 and the inner sidewall of the insulating cavity 31 are both provided with metal layers, and the metal layers on the outer sidewall of the insulating cavity 31 are electrically connected to the metal reflective plate 10. Or, a metal layer is disposed on the inner side wall of the insulating cavity 31, and the metal layer on the inner side wall of the insulating cavity 31 is electrically connected to the metal reflection plate 10 through the metalized via 311. Specifically, the metalized via 311 may be plural, and the plural metalized vias 311 are arranged at intervals along the sidewall of the insulating cavity 31. Therefore, a better shielding effect can be achieved, and electromagnetic leakage of the calibration network 50 in the insulating cavity 31 is avoided. Likewise, the metal layer on the sidewall of the insulating cavity 31 may also be formed, for example, using 3D-MID technology, or plated, or formed using an LDS process.

Further, referring to fig. 4, fig. 6 and fig. 8, the antenna module further includes a metal shielding cover 80. An opening is formed in the wall of the insulating cavity 31 facing away from the first insulator 20, and the metal shielding cover 80 covers the opening. Therefore, a better shielding effect can be achieved, and electromagnetic leakage of the calibration network 50 in the insulating cavity 31 is avoided. Specifically, the metal shield cover 80 is detachably attached to the insulating cavity 31 by using a fixing member 81 such as a screw or a bolt.

In one embodiment, a large-scale array antenna comprises one or more antenna modules as described in any of the above embodiments.

According to the large-scale array antenna, the feed power distribution network 40 and the calibration network 50 are not required to be formed on two PCBs respectively as in the traditional method, then the PCBs of the feed power distribution network 40, the PCBs of the calibration network 50 and the metal reflecting plate 10 are assembled and combined by adopting connecting pieces such as screws, the metal reflecting plate 10, the first insulator 20 and the second insulator 30 are integrally molded, then the feed power distribution network 40 is directly arranged on the insulating bottom plate 21, and the calibration network 50 is directly arranged on the bottom wall of the insulating cavity 31, so that the antenna is light in weight, the antenna structure is simplified, the antenna performance index is improved, the assembly is simplified, and the automatic production is facilitated.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

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. An antenna module, comprising:

the metal reflecting plate is embedded between the first insulator and the second insulator, and the metal reflecting plate, the first insulator and the second insulator are integrally molded;

the first insulator comprises an insulating bottom plate positioned on one side surface of the metal reflecting plate, and the feed power dividing network is arranged on the insulating bottom plate;

the second insulator comprises an insulating cavity body located on the other side face of the metal reflecting plate, and the calibration network is arranged on the bottom wall of the insulating cavity body.

2. The antenna module of claim 1, wherein the first insulator further comprises a plurality of insulating spacers disposed at intervals on the insulating base plate, the insulating spacers having a metal layer disposed thereon.

3. The antenna module of claim 2, further comprising a plurality of radiating elements disposed between adjacent insulating isolation plates, wherein the radiating elements are dipole pieces disposed on the insulating base plate, and the radiating elements are electrically connected to the feeding power dividing network.

4. The antenna module of claim 3, further comprising a guiding sheet disposed corresponding to the radiating element, wherein the first insulator further comprises a dielectric supporting pillar connected to the insulating base plate, the dielectric supporting pillar is disposed corresponding to the guiding sheet, and the guiding sheet is mounted on the dielectric supporting pillar; the guide sheet is a PCB or a metal sheet.

5. The antenna module of claim 3, wherein the feed power distribution network is formed on the insulating isolation board by using a 3D-MID technology, or is formed on the insulating isolation board by plating, or is formed on the insulating isolation board by using an LDS process; the calibration network is formed on the bottom wall of the insulation cavity by adopting a 3D-MID technology, or is formed on the bottom wall of the insulation cavity in a plating mode, or is formed on the bottom wall of the insulation cavity by adopting an LDS process; the radiation unit is formed on the insulating isolation plate by adopting a 3D-MID technology, or is formed on the insulating isolation plate by plating, or is formed on the insulating isolation plate by adopting an LDS process.

6. The antenna module of claim 2, further comprising a plurality of radiating elements located between adjacent insulating isolation plates, wherein the radiating elements are radiating plates, the first insulator further comprises a dielectric supporting column connected to the insulating base plate, the dielectric supporting column is disposed corresponding to the radiating plate, the radiating plate is mounted on the dielectric supporting column, a feed layer is disposed on a sidewall of the dielectric supporting column, and the radiating plate is connected to the feed power distribution network through the feed layer.

7. The antenna module of claim 1, wherein the first insulator further comprises a boundary plate disposed around a circumference of the insulating base plate, a metal layer being provided on a plate surface of the boundary plate; the metal layer is formed on the boundary board by using a 3D-MID technology, or is formed on the boundary board by plating, or is formed on the boundary board by using an LDS process.

8. The antenna module of claim 1, wherein the metallic reflective plate is provided with a boundary plate disposed around a circumference of the insulating base plate.

9. The antenna module of claim 1, further comprising a plurality of feeding probes, wherein the metal reflector is provided with via holes corresponding to the feeding probes, the feeding probes are disposed in the via holes, outer walls of the feeding probes and inner walls of the via holes are filled with insulating media, one ends of the feeding probes penetrate through the first insulator and are electrically connected to the feeding power distribution network, and the other ends of the feeding probes penetrate through the second insulator and are electrically connected to the calibration network.

10. The antenna module of claim 1, wherein the outer sidewall of the insulating cavity and the inner sidewall of the insulating cavity are both provided with metal layers, and the metal layers of the outer sidewall of the insulating cavity are electrically connected with the metal reflecting plate; or the inner side wall of the insulating cavity is provided with a metal layer, and the metal layer on the inner side wall of the insulating cavity is electrically connected with the metal reflecting plate through a metalized through hole.

11. The antenna module of claim 10, further comprising a metal shielding cover, wherein an opening is formed on a cavity wall of the insulating cavity facing away from the first insulator, and the metal shielding cover is disposed at the opening.

12. A large scale array antenna comprising more than one antenna module as claimed in any one of claims 1 to 11.