Direct TE01-HE11 mode converters in corrugated circular waveguide with periodic curvature perturbations

W. Henle

doi:10.1117/12.2301547

1 December 1990 Direct TE01-HE11 mode converters in corrugated circular waveguide with periodic curvature perturbations

W. Henle

Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 15143T (1990) https://doi.org/10.1117/12.2301547
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States

Abstract

Direct, high power TE01-HE11 mode converters in overmoded, circular corrugated waveguide (70 GHz, I.D. = 27.79 mm) with periodic curvature distortions in one plane have been optimized by numerically integrating the corresponding coupled-mode differential equations with new, generalized coupling coefficients. Since at appropriate corrugation depth the 'unwanted mode conversion to the surface modes TE11 -<EH11 and TE21+EH21 is negligible, it is possible to design short mode transducers with high conversion efficiency. Both, the input mode TE01 and the output mode HE11, have very low currents and electric fields at the waveguide wall (volume modes). Thus, the mode transformer shows very high power carrying capability by avoiding waveguide arcing at flange connections. The overall conversion efficiency was calculated to be 97.44% for a 3λ_Β, and 98.40%for a 4λ_Β mode converter, ohmic losses are included.

Citation Download Citation

W. Henle "Direct TE01-HE11 mode converters in corrugated circular waveguide with periodic curvature perturbations", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 15143T (1 December 1990); https://doi.org/10.1117/12.2301547

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