1. School of Reliability and Systems Engineering Beijing University of Aeronautics and Astronautics,Beijing,China,100191
2. Huazhong University of Science and Technology,State Key Laboratory of Advanced Electromagnetic Technology,Wuhan,China,430074
3. SG Micro Corp,Marketing Department,Beijing,China,100089
4. Wolong Electric Group Co., LTD,Shangyu,China,312300