Antenna unit, antenna module and large-scale array antenna

Abstract

The invention provides an antenna unit, which comprises an integrally molded non-metal substrate, first feeding columns and second feeding columns, wherein the non-metal substrate includes a substratebase plate and a partition plate arranged on the top surface of the substrate base plate, the top surface of the substrate base plate is provided with a first metal layer which at least partially serves as a feeding network circuit layer, the bottom surface of the substrate base plate is provided with a second metal layer, and at least one side surface of the partition plate is provided with a third metal layer; the first feeding columns are arranged on the top surface of the substrate base plate and used for supporting radiation units and electrically connecting the radiation units and the feeding network circuit layer; the second feeding columns are arranged on the bottom surface of the substrate base plate and used for electrically connecting a calibration network arranged at the bottom of the substrate base plate; and the first feeding columns and the second feeding columns form an integral whole with the non-metal substrate through an integral molding process. The antenna unit issimple and compact in structure, also has good product consistency while achieving light weight and high integration and is conducive to improving the electrical performance of the antenna. The invention further provides an antenna module including the antenna unit and a large-scale array antenna.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and relates to an antenna unit, an antenna module and a large-scale array antenna. Background technique [0002] With the rapid development of mobile communication technology and applications, the fifth-generation mobile communication technology (abbreviated as 5G in foreign languages) has entered the commercial trial stage. [0003] At present, in the 5G antenna solution proposed in the prior art, the antenna unit usually includes a metal base bottom plate and a metal partition plate arranged on the metal base base plate. Among them, the metal base plate is often formed by metal die-casting or sheet metal process, and the partition is usually formed by metal die-casting, aluminum extrusion or sheet metal process to meet the diverse needs of 5G large-scale dense high-frequency array-based antennas for layout space However, in engineering practice, such a structure has the fo...

AI Technical Summary

Problems solved by technology

Among them, the metal base plate is often formed by metal die-casting or sheet metal process, and the partition is usually formed by metal die-casting, aluminum profile pultrusion or sheet metal process to meet the diverse layout space requirements of antennas based on 5G large-scale dense high-frequency arrays However, such a structure has the following disadvantages in engineering practice: first, the antenna unit is heavy, which makes it difficult to realize the lightweight design of the antenna system; second, the base plate size of the 5G large-scale dense high-frequency array is often large. During the integral molding process of the metal base plate, in order to improve the consistency of the product, the thickness of the metal base plate often needs to be thickened, which will further increase the weight of the antenna unit; the third is that the metal spacer can only be fixed on the metal base plate by screws Or use welding / metal die-casting technology to fix the connection with the metal base plate. On the one hand, in the context of 5G high-frequency band applications, it is difficult to use screw fixing to meet the requirements of 5G high-band antennas for radiation boundary gaps. On the other hand, regardless of the above three In any connection method, there are problems such as high insertion loss of the 5G antenna, increased potential for intermodulation, poor consistency, and complex assembly.

[0004] In addition, in the 5G antenna solution proposed in the prior art, the feed network mostly adopts the form of PCB, and the feed network is usually connected to the base plate by screws. The radiation unit usually uses metal die-casting, sheet metal or PCB vibrator. The radiation unit and the feed The electrical networks are usually directly welded or connected by coaxial cable welding. Not only is the assembly complicated, the production cost is high, and there are many solder joints, it is also difficult to meet the requirements of low insertion loss, low intermodulation and high consistency.

[0005] It can be seen that there are still many technical problems in the 5G antenna scheme proposed by the existing technology. Facing the acceleration of the global process of the 5G industry, how to realize the light weight of the antenna, simplify the antenna structure, and improve the performance index of the antenna has become increasingly urgent.

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