Wideband Millimetre-Wave Waveguide Based Circularly Polarized Antennas


Professor Chen received B.Eng. degree in Electronic Physics from University of Zhejiang, Hangzhou, China in 1983, and Ph.D degree in Microwave Electronics from University of Electronic Science and Technology of China, Chengdu in 1988. 

In September 1988 he joined the Department of Electronic Engineering at King's College, University of London, as a Postdoctoral Visiting Fellow. In September 1990 he was employed by the King’s College London as a Research Fellow working on numerous research projects funded by the industry and governments. In March 1996 he was appointed to an EEV Lectureship at King's College London. In September 1999 He joined the Department of Electronic Engineering at Queen Mary and Westfield College, University of London. He was promoted to a Reader in October 2003 and a Professor in October 2006 in Queen Mary University of London. He is the Founding Director of the International Research Lab on Electromagnetic Theory and Applications, set up jointly between Queen Mary University of London and Beijing University of Posts and Telecommunications in 2003.

His research interests are in microwave and THz antennas and devices, wireless communications and bioelectromagnetics. He has co-authored five textbooks, over 500 journal papers and refereed conference papers. He has co-invented more than 10 international and Chinese patents. He was invited to give keynote/invited presentations in a large number of international conferences and has served as Co-Chair in a number of International Conferences/Workshops. He has served on a number of professional journal editorial boards and professional committees, and is a Fellow of IEEE and IET.


Millimetre-wave (mmWave) communication has recently attracted great interests in view of the next generation of high-data wireless link. The circular polarized(CP) antennas can offer several benefits in this application, such as good polarization match over a long distance link, multipath rejection and polarization diversity and duplex.   

This talk introduces a family of wideband mmWave CP antennas based on waveguide structures. Two types of designs, i.e. antipodal linearly tapered slot antenna (ALTSA) and septum antenna can produce around 40% bandwidth for both axial ratio (AR) < 3 dB and S11 < −15 dB in W-band. When combined with Substrate-Integrated Waveguide(SIW), the ALTSA array can generate a high gain while the septum antenna array can be employed in the multi-beam application.  Another type of septum antenna is designed to achieve dual circular polarization with 21% bandwidth for AR < 1.9dB in W-band.