Using a FMCW SAR to image the corner-reflector

Abstract

There is a growing interest in the frequency modulated continuous wave (FMCW) SAR for its small cubage, light weight, cost-effective and high resolution. Imaging sensors based on pulsed radar technology are generally too heavy or too expensive. Frequency modulated continuous wave (FMCW) radars, however are usually more compact and less expensive. An FMCW synthetic aperture radar (SAR) combines the advantage of FMCW technology and SAR methods, leading to small, cost-effective imaging radar of high resolution. In this paper, the signal processing of the triangular wave, the removing of residual video phase (RVP)and the slope factor were deduced in detailed, then the data of the experiment was used to image. In the imaging, the up chirp of the return signal is used. The result proves the FMCW SAR can accomplish high resolution imaging.