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EXCITATION OF THE FABRY-PEROT RESONATOR THROUGH EVANESCENT COAXIAL-SECTOR HOLES

heading: 
MICROWAVE ELECTRODYNAMICS
Antonenko, JV, Gribovsky, AV
Organization: 

Institute of Radio Astronomy of the National Academy of Sciences of Ukraine
12, Proskura st., Kharkov, 61085, Ukraine
E-mail: grib@rian.kharkov.ua
https://doi.org/10.15407/rej2017.01.021
Language: Russian
Abstract: 

Mirrors of the Fabry-Perot resonator in the microwave band can be represented by conducting plates with a great number of holes, which ensure partial mirror transmission.It is shown through numerical modeling that the magnitude of the reflection factor of a plane linearly polarized wave from a resonator with coaxial-sector holes in the mirrors is equal to zero for a wave-length which is greater than the cutoff one of the coaxial-sector waveguides. In this case the electromagnetic field amplitude in the resonant cavity shows an increase by an order of magnitude as compared with the exciting field amplitude. It has been found that replacement of one of the mirrors in the Fabry-Perot resonator by a continuous screen can result in increasing the plane wave ampli-tude in the resonator by almost two orders of magnitudewith respect to that of the exciting field.
Keywords: coaxial-sector waveguide, evanescent waveguide, Fabry-Perot resonator, reflection coefficient, screen of finite thickness

Manuscript submitted 07.02.2017
Radiofiz. elektron. 2017, 22(1): 21-26
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