Large-scale array antenna and antenna module and antenna unit thereof

Abstract

The invention provides an antenna unit, and the antenna unit comprises a radiation unit, an integrally-formed non-metal substrate and a metal reflector, wherein the non-metal substrate comprises a base plate and a separator plate, and the radiation unit and the separator plate are disposed on a top surface of the base plate. The top surface of the base plate is provided with a first metal layer, and the first metal layer is at least partially used to form a feed network circuit layer. At least one side surface of the separator plate is provided with a second metal layer which can enable the separator plate to serve as a radiation boundary, and the metal reflector is disposed on the bottom surface of the base plate. The antenna unit has good structural strength and consistency while achieving light weight and high integration, facilitates the improvement of the electrical performance of the antenna. The present invention also provides an antenna module including the above antenna unit and a large-scale array antenna.

Description

technical field [0001] The invention relates to the technical field of mobile communication, and relates to a large-scale array antenna, an antenna module and an antenna unit thereof. Background technique [0002] With the rapid development of mobile communication technology and applications, the fifth-generation mobile communication technology (abbreviated as 5G in foreign language) has entered the trial commercial stage. [0003] At present, in the 5G antenna solution proposed in the prior art, the antenna unit generally includes a metal base plate and a metal partition disposed on the metal 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 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 e...

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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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