ICMMT2016 (the Ninth International Conference on Microwave and Millimeter Wave Technology) will be held in Beijing International Conference Center (BICC, located close to Beijing Olympic Park), Beijing, China, on June 5-8, 2016. Technical papers describing original work in research, development, and application of all area in microwave and millimeter wave are solicited, including antenna, EM theory and numeric method, RFIC, EMC, measurement, wireless and optic communications.  link[ http://www.em-conf.com/icmmt2016/ ]

Our conference paper is as, 

THz Broadband Quasi-Optical Mode Converter Antenna System
Chao-Hai Du† , Shi Pan, Pu-Kun Liu*
School of Electronics Engineering and Computer Science, Peking University, Beijing, P. R. China, 100871
(email: †duchaohai@pku.edu.cn, *pkliu@pku.edu.cn)

Abstract—This paper presents a broadband quasi-optical (QO) mode converter antenna system, which can  transfer  a waveguide TE62 mode into free-space Gaussian beam around 330 GHz. The converter contains a Vlasov launcher and three reflector mirrors. Special considerations, including a reasonably large aperture of the Vlasov launcher and the optimized combination of two elliptic reflectors and a bifocal parabolic reflector, are the keys to achieve broadband mode converting. The optimized   converter is well compatible with the gyrotron electron-optical system and generates Gaussian beam with efficiency higher than 80% in a broadband range between 310-340 GHz. The principle of the broadband converter can also be applied to gyrotron amplifiers, even other gyrotron devices.