Microwave Doppler radar sensor with enhanced immunity against interferences

Modern anti-armor missiles represent enormous threat for any military vehicle. Simple hand-held missiles are able to penetrate 300 mm, more sophisticated missiles up to 1000 mm of the best steel armors. Active defense methods seem to be promising ways how to face this problem. These systems are based on sensors able to detect and measure approaching threat missile and generate signals that activate a suitable counter-measure. The paper describes Doppler radar sensors designed for active defense configurations. The designed version solves one of potential problems connected with employment of these radars at military vehicles. This concerns sufficiently high immunity against both unintentional and intentional interfering signals.