Millimeter wave radar oblique polarization radiation MIMO antenna unit

Abstract

The invention relates to the technical field of communication, in particular to a millimeter wave radar oblique polarization radiation MIMO antenna unit, which utilizes an impedance conversion balun with a square ring, reflection coefficients in a broadband range can be self-counteracted, broadband matching is realized, the tolerance of the antenna is improved, and an antenna is easy to process; through adoption of plated-through holes, lateral electromagnetic isolation of the antenna unit is realized, and MIMO multichannel channel isolation is facilitated; and the antenna performs inclined 45-degree polarization radiation, and echo signals in vertical and horizontal polarization directions can be received. The antenna unit structure provided by the invention has a miniaturized and integrated compact structure while keeping the broadband and low-loss antenna performance, a modular design method of the antenna is convenient for large-scale array formation and universal unification, and the antenna unit structure is suitable for application requirements of a low-cost MIMO array under a communication application platform. The design of the antenna unit is based on a PCB technology, the same-layer design processing of the antenna unit and the integrated chip is realized, the loss is low, the integration precision is high, the repeatability is good, and the antenna unit is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a millimeter-wave radar obliquely polarized radiation MIMO antenna unit. Background technique [0002] How to improve the transmission rate and quality in the harsh channel environment and limited bandwidth has always been the research focus of wireless communication. MIMO (Multiple Input / Multiple Output) technology, which uses multiple antennas or arrays to transmit information at the transmitter and receiver of a wireless communication system, has become the most effective way to improve data transmission rate and quality on wireless channels. As the front end of the wireless communication system, the antenna puts forward stricter requirements on its structure, size, layout and polarization characteristics in a limited space. [0003] Microstrip antennas have the advantages of small size, light weight, and low profile, and are widely used in radar and communication field...

AI Technical Summary

Problems solved by technology

This kind of antenna isolates the radiation layer and the feed layer through the ground plane, eliminates the mutual influence, and overcomes the shortcomings of the inductance effect brought by the traditional feed mode and the parasitic radiation of the feed network. The material effectively broadens the bandwidth of the microstrip antenna, but the requirements for antenna impedance matching accuracy are too high, which makes the antenna processing extremely difficult. Due to the air layer between the radiation patch and the coupling gap, there is a problem of lateral electromagnetic leakage.

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