The IEEE International Workshop on Electromagnetics (iWEM) began in Tapei (2010) and named as International Conference on Applications of Electromagnetism and Student Innovation Awards (2010 ICAE/SIA). The forum renamed in Taipei (2011) as IEEE iWEM2011. This workshop series will be held in rotation in Taiwan, China, Hong Kong, and Japan. It especially focuses more on student innovation competition and runs in a single session. IEEE iWEM2013 is co-organized by the State Key Laboratory of Millimeter Waves at the City University of Hong Kong and the IEEE AP/MTT Hong Kong Chapter and technically co-sponsored by Oriental Institute of Technology, University of Electronic Science & Technology of China, Yokohama National University, and IEEE AP-S. The venue of the workshop is City University of Hong Kong.