Nonlinear effect of impaired limiter on synthetic aperture radar

In the complicated electromagnetic environment, some key devices may be impaired by the nonlinear effect which could reduce the detecting performance of the system, and worst of all result in the failure of the whole system. This paper selects the limiter of one kind of synthetic aperture radar (SAR) to investigate the modeling of nonlinear characteristics and its effect on radar signal processing. Theoretic analysis and computer simulation show that the performance of such a typical electronic system as the SAR under study would be reduced to have bad focusing and low resolving capability by the nonlinear behavior of key devices.