1 December 1990 Generation of rotating high-order TEm,n modes for cold-test measurements on high-power quasl-optical gyrotron output mode converters
Author Affiliations +
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, "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
PROCEEDINGS
3 PAGES


SHARE
RELATED CONTENT

Submillimeter wave superconducting flux-flow oscillator
Proceedings of SPIE (October 01 1991)
A wideband 240 GHz receiver for the submillimeter array
Proceedings of SPIE (July 19 2016)
Uniform Waveguide Leaky Wave Antennas
Proceedings of SPIE (October 24 1985)
Transitions In Open Millimeter Waveguides
Proceedings of SPIE (October 24 1985)
Optimum design of a multifin coaxial converter
Proceedings of SPIE (July 08 1993)

Back to Top