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Telecommunications and Radio Engineering

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

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v68.i1.20
pages 27-48

Impedance Method for Investigation of Open Resonator Characteristics under Conditions of Hybrid Mode Excitation

V. V. Glamazdin
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., 61085 Kharkiv, Ukraine
V. N. Skresanov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., 61085 Kharkiv, Ukraine
A. I. Shubny
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine

ABSTRACT

The method for calculation of the unloaded eigen Q-factors, resonance frequencies, coupling coefficients with a transmission line and mutual coupling coefficient of two partial modes with closely located resonance frequencies excited in resonator is suggested. The method is based on the approximation of experimentally or theoretically obtained dependence of complex-valued reflection coefficient of a resonator by a fractional rational function of the real variable that describes the forced oscillation in two coupled oscillation circuits. The method is approbated by using of calculation data of the reflection coefficient of a quasi-optical open resonator (OR) and applied to OR characteristics investigation under conditions of hybrid mode excitation.