Weidong Hu is Professor at the Beijing Key Laboratory of Millimeter Wave and Terahertz Technology, School of Integrated Circuit and Electronics, Beijing Institute of Technology, China. His research interests include radar cross section, microwave remote sensing, space terahertz detection and remote sensing technology. He is National Leading Talent in Scientific and Technological Innovation and an expert in the Radio Frequency Group, Ministry of Industry and Information Technology, China. Yuming Bai is Postdoctoral Researcher with the Beijing Key Laboratory of Millimeter Wave and Terahertz Technology, School of Integrated Circuit and Electronics, Beijing Institute of Technology, China. His research interests include antenna design, surrogate model, and terahertz imaging. Xin Lv is Professor and Head of the Beijing Key Laboratory of Millimeter Wave and Terahertz Technology, School of Integrated Circuit and Electronics, Beijing Institute of Technology, China. His research interests include millimeter-wave and terahertz circuit, antenna, and communication systems.