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Telecommunications and Radio Engineering
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ISSN Imprimir: 0040-2508
ISSN En Línea: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v66.i20.30
pages 1823-1838

Influence of Random Cavity Heterogeneities on the Microwave Quasi-Optical Resonator
Spectrum. I. Statistical Analysis

Ye. M. Ganapolsky
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
Z. Ye. Eremenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
Yu. V. Tarasov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine

SINOPSIS

Statistical analysis of oscillations in SHF cavity resonator filled with random dielectric heterogeneities is performed. It is shown that the heterogeneities having negligibly small dissipative losses and result in essential shift and widening of spectral lines. We relate this effect to stochastic intermode wave scattering on heterogeneities. It is supplementary to dissipative widening caused by ohmic losses. The shift and widening of each spectral line depend essentially on frequency interval between this line and nearest lines of the spectrum. On increasing the interval, the influence of heterogeneities reduces substantially. This results in essential spectrum rarefaction. The rarefaction is due to the fact that solitary spectral lines are to minor extent subjected to the influence of heterogeneities and preserve their high quality factors. At the same time, the Q-factors of adjacent lines change substantially. As a result, when exciting the resonator, only sparse lines with high Q-factors dominate in the spectrum.


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