Title :
Design of a 220GHz Vlasov (antenna) mode converter
Author :
Zhang, Xianrong ; Wang, Qingyuan ; Cheng, Yong ; Wen, Song
Author_Institution :
Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A Vlasov antenna (mode converter) for a center frequency of 220 GHz, which includes a Vlasov-type step-cut launcher and a parabolic reflector, is proposed in this paper. It converts the TE03 mode in circular waveguide to a highly Gaussian-like beam at the output window. Optimization is carried out and good results have been achieved with the VSWR 1.2 at 190-250GHz and the conversion efficiency greater than 80%. Simulation results showed that the radiation gain of the Gaussian-like beam is 31.8dB.
Keywords :
circular waveguides; convertors; gyrotrons; reflector antennas; Gaussian-like beam; TE03 mode; Vlasov antenna; Vlasov-type step-cut launcher; circular waveguide; frequency 190 GHz to 250 GHz; frequency 220 GHz; mode converter; parabolic reflector; Antenna radiation patterns; Approximation methods; Gyrotrons; Optical waveguide theory; Optics; Reflector antennas; Quasi-optical; Vlasov antenna; mode converter;
Conference_Titel :
Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2012 International Workshop on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4673-1893-8
DOI :
10.1109/MMWCST.2012.6238113
