Title :
Design of waveguide-to-orotron-resonator transition with modified Bethe theory
Author :
Faby, G. ; Schünemann, K.
Author_Institution :
Tech. Univ. Hamburg-Harburg, Germany
fDate :
11/1/1997 12:00:00 AM
Abstract :
The modified Bethe theory is applied to the waveguide-to-resonator transition, which is used for output coupling in an orotron oscillator designed for operation at 94 GHz. The finite thickness of the coupling hole between output waveguide and resonator is taken into account. The approach results in an equivalent circuit, which describes the reflection-type resonator, with respect to the output waveguide. Its equivalent circuit parameters are given in closed-form expressions. The calculated reflection coefficients are compared to experimental results. The assumed single-mode operation in the resonator is demonstrated by field-profile measurements
Keywords :
Q-factor; cavity resonators; electromagnetic fields; equivalent circuits; millimetre wave tubes; slow wave structures; waveguide theory; 94 GHz; EHF; MM-wave tubes; circuit parameters; closed-form expressions; equivalent circuit; field-profile measurements; modified Bethe theory; orotron oscillator; output coupling; output waveguide; reflection coefficients; reflection-type resonator; single-mode operation; transition design; waveguide-to-orotron-resonator transition; Apertures; Coupling circuits; Dielectric measurements; Electromagnetic waveguides; Equivalent circuits; Optical resonators; Optical waveguides; Oscillators; Waveguide theory; Waveguide transitions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
