1.Beijing Institution of Radio Measurement， Beijing 100854， China;2.School of Electronics Engineering and Computer Science， Peking University， Beijing 100871， China
Sponsored by the National Natural Science Foundation of China under Contracts 61531002, NSAF U1830201 and 61861130367 (Newton Advanced Fellowship from Royal Society United Kingdom NAF/R1/180121).
A terahertz quasi-optical mode converter with wide bandwidth was studied and designed. The quasi-optical mode converter used Denisov launcher, which had high efficiency, and worked in TE6,2 mode. It was used to realize mode conversion in gyrotron. As the parameters of Denisov launcher were the main factors affecting the broadband performance of quasi-optical mode converter, the optimal design of the radiator parameters could increase the bandwidth of the mode converter. Using the self-developed quasi-optical simulation program for simulation, the bandwidth of the mode converter can reach 2 GHz (center frequency 94 GHz).
BIAN Hui-Qi, DU Chao-Hai, PAN Shi, LIU Pu-Kun. Design and analysis of a broadband quasi-optical mode converter with a Denisov launcher[J]. Journal of Infrared and Millimeter Waves,2020,39(5):567~575Copy