2013 International Workshop on Microwave and Millimeter Wave Circuits and System Technology (MMWCST2013) will be held atMount Emei, Sichuan Province, China. Before this time, MMWCST2012 has been successfully held April 2012 at Chengdu,China. This conference will build an international academic platform, demonstrates the great progress in the areas of MW&MMW world-widely, enhance the understanding of the latest MW&MMW theory, deepen the technical exchange between researchers, and promotetechnological progress in relevant areas. The workshop will include plenary presentations given by eminent scholars in the microwave andmillimeter wave circuit and system areas as well as a number of technical sessions to provide the participants a forum for exchanging theinformation about state-of-the-art research in all the related fields. Authors are invited to submit papers describing their original works onall the aspects of microwaves and millimeter wave circuits and systems. MMWCST2013 is organized and sponsored by University of Electronic Science and Technology of China (UESTC), and technically co-sponsored by the IEEE Chengdu Section (IEEE CDS) and the Institute of Microelectronics of the Chinese Academy of Sciences (theIMECAS). The conference sincerely welcomes local and overseas researchers and engineers working in the areas of microwaves, millimeter wave,electromagnetic theory, antennas, circuits, and communications. You are cordially invited to submit your latest work to this importantevent.