TELECOMMUNICATIONS AND RADIO ENGINEERING - 2012 Vol. 71,
No 7 		 

 

 

 

WAVE PROPAGATION IN A WAVEGUIDE SECTION WITH SHARP CORRUGATIONS


V.A. Goryashko, T.M. Slipchenko, & Yu.V. Tarasov
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
Address all correspondence to V.A. Goryashko E-mail: vitgor06@gmail.com

Abstract
The rigorous excitation equations are used to analyze wave propagation in a rectangular waveguide section with sharp periodic corrugations whose height is much greater than the period. It has been shown that the Brillouin diagram of the corrugated and regular waveguides in the case of strong gradient scattering is characterized by qualitatively the same frequency dependence of the longitudinal wavenumber. The only difference is that the cutoff frequencies of the corrugated waveguide modes increase with decreasing the corrugation period, and it is always possible to implement the single-mode regime within an arbitrary frequency range lying higher than the first cutoff frequency. The effect can be used to suppress the mode competition in microwave amplifiers, as well as in narrow-band oscillators provided that the latter involve the Bragg reflectors as a feed-back.
KEY WORDS: irregular waveguide, strong gradient scattering, cutoff frequency

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pages 581-603

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