1 December 1990 Generation of rotating high-order TEm,n modes for cold-test measurements on high-power quasl-optical gyrotron output mode converters
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Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 151419 (1990) https://doi.org/10.1117/12.2301455
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States
Abstract
This paper reports about numerical optimization calculations on mode converters to generate high-order TEm,n modes (TE22.2 at 110 GHz, TE12,2 at 120 GHz, TE15,2 and TE10,4 at 140 GHz) in oversized circular waveguides for conversion efficiency optimization studies (cold-tests) on high-power quasi-optical gyrotron output mode transducing antennas in the millimeter wave range. Multistep TE0.1 - to - TE0.n - to - TEm,n conversion sequences using periodic radius and m-fold (corksrew-type) wall perturbations provide theoretical output mode purities around 99 % . Measured values are (97 ± 3) %.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Thumm, M. Thumm, } "Generation of rotating high-order TEm,n modes for cold-test measurements on high-power quasl-optical gyrotron output mode converters", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 151419 (1 December 1990); doi: 10.1117/12.2301455; https://doi.org/10.1117/12.2301455
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