Calibration and performance analysis on channel mismatch of multi-beam antenna on satellites
1.Shanghai Engineering Center for Microsatellites, Shanghai 200050, China;2. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China)
Abstract： To solve the mismatch effect of amplitude-and-phase errors on multibeam antenna performance, the radio frequency channel amplitude and phase errors of multibeam transmitting antenna on sa-tellite were experimentally measured to obtain the corresponding relations of channel amplitudeandphase mismatch and temperature, and to compensate the mismatch. The shell temperatures are almost same after temperature stabilization, which effectively results in channel consistency. Some methods were used to improve temperature consistency. Calibration of channel is the key to guarantee the performance indexes of multi-beam antenna on satellites. The calibration principle block diagram and flow chart of multi--beam transmitting antenna were designed. The theoretical analysis and simulation results show that the proposed calibration method is effective for calibration of multi-beam antenna on satellites.
2012, Vol. 33 
