This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessArticle by Bin Li 1,2,*, Guobin Wan 1, Yun Li 2, Zhaoshen Shao 2, Guowei Chen 2, Fengchao Ren 2 and Jiaqi Su 2 1 School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710000, China 2 Department of Space Microwave Technology, Xi’an Institute of Space Radio Technology, Xi’an 710000, China * Author to whom correspondence should be addressed.