A Suppression Method of Target-Pylon Interaction in Narrowband RCS Measurement

Abstract

The interference between the metal pylon and the target is an important source of error in the RCS measurement of the low scattering stealth target. Imaging filtering is a commonly used method to suppress the interference. However, the distance resolution based on the conventional FFT is limited by the measured bandwidth. For narrowband measurements, there is a large error in the estimation of the scattering center position information, and the number of scattering centers is not accurate, which seriously affects the filtering effect. In this paper, TLS_ESPRIT super-resolution algorithm and the GTD model are used to filter the distance of the measured object. The simulation results show that the proposed method has a better filtering effect than the conventional Fourier transform.