Monopulse processor with AM-AM and AM-PM errors compensation under saturation operation

One of the key points in the high performance of modern surveillance and tracking radars is the incorporation of monopulse extractors for determining the azimuth of the target. In good conditions of signal-to-thermal noise ratio the accuracy of such systems is determined by the correct balance in amplitude and phase of the different channels. This balance can be broken by the nonlinear behaviour of the receiver when handling high power. This situation is specially important in electronic warfare environments where the interference provocated by the enemy can drive the receiver into saturation. A new monopulse processor structure is presented where the errors induced by the AM-AM and AM-PM behaviour of the receiver are opposite in sign, so producing a partial cancellation. The theory of statistical quasilinearization is used to analyze and minimize the errors induced under a provocated noisy interference