Image Simulator for One Dimensional Synthetic Aperture Microwave Radiometer
Calibration for a one-dimensional synthetic aperture microwave radiometer is critical. A numerical image retrieving method using an intermediate transformation matrix called the gain matrix or simply G-matrix is considered to be a good method. This matrix takes into account all the couplings and un-uniformed amplitude and phase between the channels. However,measuring the G-matrix is not an easy job. One has to set up a point source in the far field and rotate the system in the fan beam direction. The difficulty is mainly due to the incomplete test environment. In this paper, a measurement set-up called image simulator is present. It is a circuit network composed of a number of high accurate microwave I-Q vector modulators and a noise generator. It simulates the incoming waves to the thinned antenna array corresponding to any image scene to be measured. The design and test of the image simulator are presented followed with test results of G-matrix. The image simulator can also simulate a point source in the two dimensional aperture case which discussed in the paper too.
Qiong Wu Hao Liu Ji Wu
Center for Space Science and Applied Research,CAS,China
国际会议
Progress in Electromagnetics Research Symposium 2005(2005年电磁学研究新进展学术研讨会)(PIERS 2005)
杭州
英文
524-528
2005-08-22（万方平台首次上网日期，不代表论文的发表时间）