Millimeter wave radar overcomes the disadvantages of a variety of detection methods, detection has stable performance and good adaptability to the environment, can be used to achieve all-weather, all day long, simple structure, low power, high resolution and sensitivity, has become the first choice of active anti-collision radar. To meet the development requirement of application platform, helicopters, unmanned aerial vehicle active safety, tachometer, mechanical engineering and safety ranging anti-collision, street lamp system and intrusion alarm system, automatic door sensor etc., has very important commercial significance!