Geng Youlin, Ph.D, Professor, received the M.Sc. degree in electromagnetic field and microwave techniques from the China Research Institute of Radiowave Propagation (CRIRP), Xinxiang, China, in 1992, and the Ph.D. degree in electronic science and technology from Xidian University, Xian, China,in 2006. From 1992 to 2002, he works for CRIRP as an Assistant Engineer, an Engineer, and then a Senior Engineer. Since 2002, he has been working for the Institute of Antennas and Microwaves, Hangzhou Dianzi University, Hangzhou, China, as a Faculty Member, where he has been a Full Professor since 2005. His current research interests include analytical and numerical methods of electromagnetic scattering by complex media, wave propagation in complex medium, and small antenna design. He is a Senior Member of the China Institute of Electronics.