Title :
A broadband corrugated horn for a W-band gyro-TWA
Author :
McElhinney, Paul ; Donaldson, Craig R. ; He, Wenlong ; Zhang, Liang ; Ronald, Kevin ; Phelps, Alan D R ; Cross, Adrian W.
Author_Institution :
Dept. of Phys., Univ. of Strathclyde, Glasgow, UK
Abstract :
A quasi-optical mode converter in the form of a corrugated horn has been constructed for a W-band gyrotron traveling wave amplifier (gyro-TWA). The prototype was designed and optimized through analytical and numerical simulations. The horn converts a cylindrical TE11 mode into a free-space TEM00 mode in a frequency band of 90 GHz to 100 GHz. The optimized simulation predicts a return loss better than -35 dB and a Gaussian coupling efficiency of 97.8% and the measured prototype demonstrates a close agreement with these figures.
Keywords :
gyrotrons; millimetre wave amplifiers; numerical analysis; travelling wave amplifiers; Gaussian coupling efficiency; W-band gyro-TWA; W-band gyrotron traveling wave amplifier; broadband corrugated horn; cylindrical TE11 mode; efficiency 97.8 percent; free-space TEM00 mode; frequency 90 GHz to 100 GHz; numerical simulations; quasi-optical mode converter; Bandwidth; Couplings; Electron beams; Gyrotrons; Helium; Plasmas; Prototypes; Corrugated horn; Gyro-TWA; quasi-optical;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2012 IEEE Thirteenth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0188-6
Electronic_ISBN :
978-1-4673-0187-9
DOI :
10.1109/IVEC.2012.6262256
