Wave beam switchable antenna device and method thereof

Abstract

The invention discloses a wave beam switchable antenna device and a method thereof. The device comprises antennas arranged separately in rows, each antenna unit comprises two travelling wave antenna arrays arranged separately from left to right and used for transmitting and receiving radar high-frequency signals, the lengths of the travelling wave antenna arrays in the left side increase gradually, the lengths of the travelling wave antenna arrays in the right side decrease gradually, the travelling wave antenna arrays in the left side can generate wave beams of different deflection directions to cover a specific range in the left side, and the travelling wave antenna arrays in the right side can generate wave beams of different deflection directions to cover a specific range in the right side. According to the method, the quantity and lengths of the antenna arrays can be determined according to a required coverage range, after the antenna device is arranged, switching of the travelling wave antenna arrays is controlled and directional wave beams in the left and right sides are switched. The device and method can realize switching of multiple wave beams, and have the advantages including simple and compact structure, low needed cost, large spatial coverage range and small size.

Description

technical field [0001] The invention relates to the technical field of radar antennas, in particular to a switchable beam antenna device and method. Background technique [0002] The radar sensor is the main component of the millimeter wave sensor. It covers the designated area through the radiation of the antenna. Among them, the single-shot and single-receive millimeter-wave radar using the FM continuous wave system can obtain the speed information of the target, and the multi-receive antenna can also Get the angle information of the target. In more and more applications, it is necessary to use multiple radar sensors to obtain target information for all-round monitoring, such as perimeter security systems, that is, by deploying multiple radar sensors on the perimeter of a fixed area, when intrusion When the target crosses the perimeter or moves around the perimeter, the sensor can detect the moving target and give an alarm message in real time, thus playing the role of pe...

AI Technical Summary

Problems solved by technology

The current millimeter-wave sensors are usually fixed single-beam radar sensors with low cost, but the antenna pattern has only one fixed main beam, which cannot meet the needs of all-round monitoring such as perimeter security systems; The main beam can realize beam scanning within a certain angle range, but the electronically scanned radar requires a certain number of analog or digital phase shifters, and its cost is much higher than that of a fixed single-beam radar sensor

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