Title :
A high directivity broadband corrugated horn for W-band gyro-devices
Author :
McElhinney, P. ; Donaldson, C.R. ; Liang Zhang ; Wenlong He
Author_Institution :
Dept. of Phys., Univ. of Strathclyde, Glasgow, UK
fDate :
3/1/2013 12:00:00 AM
Abstract :
A quasi-optical mode converter in the form of a corrugated horn has been designed through numerical simulations, manufactured and experimentally measured for application in W-band gyro-devices. This horn converts a cylindrical TE11 mode into a free space TEM00 mode in a frequency band of 84-104 GHz with a reflection better than 30 dB, a Gaussian coupling efficiency of 98% and directivity of 26.6 dB at 95 GHz. The small beam waist makes such a horn ideal for use with a depressed collector system. The measured results are in excellent agreement with the numerical simulations.
Keywords :
gyrotrons; numerical analysis; travelling wave tubes; W-band gyro-device; cylindrical TE11 mode; depressed collector system; free space TEM00 mode; frequency 84 GHz to 104 GHz; gain 26.6 dB; high directivity broadband corrugated horn; numerical simulations; quasioptical mode converter; Bandwidth; Electron beams; Frequency measurement; Microwave measurements; Microwave oscillators; Microwave theory and techniques; Corrugated horn; Gaussian horn; gyro-amplifiers; quasi-optical mode converter;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2228840
