AN ACCURATE IMAGING ALGORITHM FOR MILLIMETER WAVE SYNTHETIC APERTURE IMAGING RADIOMETER IN NEAR-FIELD

• DOI: 10.2528/pier13060702
• Publication Date: 2014-01-14T06:32:14Z
• Authors: Jianfei Chen; Yuehua Li; Jianqiao Wang; Yuanjiang Li; Yilong Zhang
• Keywords: Aperture synthesis; Aperture (computer memory)

Due to the fact that imaging distance is similar dimension of synthetic aperture antenna in near-field, Fourier theory used traditional radiometer (SAIR), which based on far-field approximation, invalid for near-field imaging.This paper devoted establishing an accurate algorithm nearfield millimeter wave SAIR.Firstly, deduced and its relationship analyzed.Then, established.In this method, quadratic phase item pattern are taken into consideration, image reconstruction performed by minimizing Total-Variation norm brightness temperature image, reduces influence visibility observation error improves precision.Finally, effectiveness proposed has been tested means several simulation experiments, superiority also demonstrated comparison between it existing transform methods.The results demonstrate method efficient, feasible SAIR.