1. Nanjing University of Aeronautics and Astronautics, College of Electronic and Information Engineering, Nanjing, Jiangsu, China
2. Harbin Instituteof Technology at Weihai, College of Information Science and Engineering, Weihai, China
3. AVIC Research Institute for Special Structures of Aeronautical Composites, Aviation Key Laboratory of Science and Technology on High Performance Electromagnetic Windows, Jinan, Shandong, China