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ISSN 2415-3400 (Online)
ISSN 1028-821X (Print)

A resonant short-circuit plunger as part of tunable waveguide-dielectric and waveguide-coaxial resonators built around cylindrical evanescent waveguides

heading: 
MICROWAVE AND TERAHERTZ TECHNOLOGY
Skuratovskiy, IG, Khazov, OI, Shakhova, AS
Organization: 

O.Ya. Usikov Institute for Radiophysics and Electronics of NAS of Ukraine
12, Akad. Proskury St., Kharkov, 61085, Ukraine
Е-mail: briz@ire.kharkov.ua
https://doi.org/10.15407/rej2021.02.046
Language: ukranian
Abstract: 

Subject and Purpose. Tunable resonant structures make numerous microwave devices, among which are waveguide-dielectric and waveguide-coaxial resonators (WDR and WCR) built around cylindrical evanescent waveguides and involving a resonant short-circuit (RSC) plunger for tuning purposes. The present paper seeks to study specific features of the RSC-plunger operation in the evanescent waveguide and estimate the RSC-plunger efficiency.

Method and Methodology. The RSC-plunger efficiency is approximately estimated in terms of the transmission line theory. Comparative experimental verification of the Q-factor increase is provided by an example of a 3 cm WDR resonator equipped with a RSC-plunger.

Results. It has been shown that relevant formulae of the transmission line theory can be extended for the RSC-plunger efficiency estimation on the TEM and H11 oscillations. A possibility has been studied of the TEM type transformation to the H11 oscillation and back when the spurious resonance of the RSC-plunger falls within the WDR (WCR) tuning range. 

Conclusion. Insignificance of the effect that small deviations from the numerically predicted dimensions of the RSC-plunger exert on the RSC-plunger operation efficiency has been demonstrated. The RSC-plunger efficiency and a possibility to remove the spurious resonances from the resonator tuning range have been experimentally confirmed.
Keywords: evanescent waveguide, Q-factor, resonant frequency, short-circuit plunger, waveguide-coaxial resonator, waveguide-dielectric resonator

Manuscript submitted 28.12.2020
Radiofiz. elektron. 2021, 26(2): 46-53
Full text (PDF)

References: 
1. Belous, R.I., Martynyuk, C.P., Motornenko, A.P., Skuratovskiy, I.G., 2015. Properties of tunable waveguide-dielectric resonator of millimeter range with high Q-factor. Radiofizika i elektronika. Kharkov: IRE NAS of Ukraine Publ. 6(20), pp. 81-84 (in Russian). DOI: https://doi.org/10.15407/rej2015.01.081
 
2. Belous, R.I., Motornenko, A.P., Skuratovskiy, I.G., Khazov, O.I., 2014. Peculiarities of waveguide-dielectric resonator with short-circuit plunger. Radiofizika i elektronika. Kharkov: IRE NAS of Ukraine Publ. 5(19), pp. 90-93 (in Russian).
 
3. Belous, R.I., Martynyuk, C.P., Motornenko, A.P., Skuratovskiy, I.G., Khazov, O.I., 2013. Properties of waveguide-dielectric resonator with resonance short-circuit plunger. Radiotehnika. 174, pp. 55-57 (in Russian).
 
4. Motornenko, A.P., Skuratovskiy, I.G., Khazov, O.I., 2012. Waveguide-dielectric resonator with resonance short-circuit plunger. Radiofizika i elektronika. Kharkov: IRE NAS of Ukraine Publ. 3(17), pp. 14-17 (in Russian).
 
5. Belous, R.I., Motornenko, A.P., Khazov, O.I., Skuratovskiy, I.G., 2016. Waveguide-coaxial resonator with wide-range frequency tuning and increased Q-factor. Telecommunications and Radio Engineering, 75 (10), pp. 887-894. DOI: https://doi.org/10.1615/TelecomRadEng.v75.i10.30
 
6. Belous, R.I., Skuratovskiy, I.G., Khazov, O.I., Shakhova, A.S., 2017. Peculiarities of waveguide-coaxial resonator on the TEM-oscillations with resonance short-sircuit plunger. Radiophys. Electron., 22 (4), pp. 82-87 (in Russian) DOI: https://doi.org/10.15407/rej2017.04.082
 
7. Meinke, X., Gundlach, F.V., 1960. Radio engineering handbook. Moscow-Leningrad: Gosenergoizdat Publ. (in Russian).
 
8. Lebedev, I.V., 1961. Equipment and devices at microwave frequencies. Moscow-Leningrad: Gosenergoizdat Publ. (in Russian).
 
9. Feldshtein, A.L., Yavich, L.R., Snirnov, V.P., 1967. Handbook to the elements of waveguide technology. Moscow: Sov. Radio Publ. (in Russiun).
 
10. Shestopalov, V.P., 1992. Morse critical points of dispersion equations. Kiyev: Naukova Dumka Publ. (in Russian).