Microstrip Whispering-Gallery-Mode Resonator

Whispering gallery modes (WGMs) were exited in a new type of microstrip circular resonator formed under a conducting disc placed directly on or above a continuous dielectric layer. Resonance frequencies, quality factors, and distributions of the microwave field for different WGMs have been studied n...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2015-09, Vol.63 (9), p.2776-2781
Main Authors: Bunyaev, Sergey A., Barannik, Alexander A., Cherpak, Nickolay T.
Format: Article
Language:English
Subjects:
Dielectrics
Measurement and modeling
Metals
Microstrip resonators
Microwave theory and techniques
millimeter waves
Optical resonators
planar structures
Resonant frequency
whispering gallery mode (WGM) resonators
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Summary:Whispering gallery modes (WGMs) were exited in a new type of microstrip circular resonator formed under a conducting disc placed directly on or above a continuous dielectric layer. Resonance frequencies, quality factors, and distributions of the microwave field for different WGMs have been studied numerically and experimentally as a function of distance between metal and dielectric. An unloaded Q-factor up to 890 was obtained using polished copper disk and layer of single crystalline sapphire. Generalization of the known condition of the excitation of the WGMs in a dielectric medium is proposed.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2015.2457898