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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Druckformat: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v75.i1.30
pages 31-37

PECULIARITIES OF INTERMODE INTERACTION IN QUASI-OPTICAL DIELECTRIC DISK RESONATORS IN THE CASE OF INTERNAL EXCITATION OF PARASITIC OSCILLATIONS

A. Ya. Kirichenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085
G. V. Golubnichaya
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine

ABSTRAKT

Disk dielectric resonators with whispering gallery modes are usually characterized by a high Q-factor. However, the dense spectrum of these oscillations is an obstacle for their use as microwave components. In particular, the intermode interaction of oscillations results in the distortion of amplitude-frequency characteristics. The investigation of peculiarities of this interaction allows one to understand conditions for their excitation and to find the possibilities to avoid them. The peculiarities of the inter-type interaction in the quasi-optical dielectric disk resonator, excited at higher azimuthal modes, in the case of internal excitation of parasitic oscillations in a single disk are investigated experimentally. The influence of a discontinuity, introduced with a coupling element between the resonator and dielectric waveguide, on the resonance characteristics is studied. It is shown, that this influence can be compensated by insertion of an additional discontinuity. Also, it is shown that parameters of the double-humped resonance characteristic strongly depend on the azimuthal position of this discontinuity. Up to date the intermode interaction was investigated only in case of the external excitation, using two disk dielectric resonators. The results obtained can be used as a method for selection of a spectrum of oscillations in disk dielectric resonators.


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