Title :
A reflected power isolator for a 10 kW, 28 GHz gyrotron
Author_Institution :
Plasma Sci. & Fusion Center, MIT, Cambridge, MA, USA
Abstract :
An efficient reflected power isolator has been built for a 10 kW, 28 GHz gyrotron for operation with a circularly polarized beam. It makes use of a one-dimensional copper grill linear polarizer in a 4-port waveguide cross and a grooved mirror in a miter bend for transformations between linear and circular polarizations. The polarizers are implemented in 76 mm diameter corrugated aluminum waveguide with water loads for power rejection. Backward power isolation of 25 dB and an insertion loss of ~0.3 dB have been determined.
Keywords :
gyrotrons; microwave isolators; polarisation; 1D copper grill linear polarizer; 4-port waveguide cross; backward power isolation; circular polarizations; circularly polarized beam; corrugated aluminum waveguide; frequency 28 GHz; grooved mirror; gyrotron; insertion loss; linear polarizations; miter bend; polarizers; power 10 kW; power rejection; reflected power isolator; transformations; water loads; Copper; Gyrotrons; Isolators; Millimeter wave technology; Mirrors; Optical waveguides; Wires; gyrotron; millimeter-wave technology; mode converters; polarizer; reflected power isolator; waveguides;
Conference_Titel :
Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4673-6177-4
DOI :
10.1109/MWSYM.2013.6697428
