Abstract:

Based on the squint mode, a high resolution wide swath revisit synthetic aperture radar (SAR) imaging mode is proposed. The transmitting antennas are configured as the single phase center multiple azimuth beams (SPC MAB). The formed two beams point to two different directions to obtain two images of the observed scenario. The receiving antennas are configured as displaced phase center multiple azimuth beams (DPC MAB) to decrease the required pulse repetition frequency (PRF). The decreased PRF can ensure the high resolution wide swath imaging. Based on the analysis of the character of the return signal, a processing method named multiple beam multiple channel algorithm (MBMCA) is proposed to separate the aliased sub-beams’ echoes. The separated echoes are focused respectively to get the revisit imaging to the observed scenario. The simulation experiments verify the validity and correctness of the proposed imaging mode and processing algorithm.