Title :
Microstrip Whispering-Gallery-Mode Resonator
Author :
Bunyaev, Sergey A. ; Barannik, Alexander A. ; Cherpak, Nickolay T.
Author_Institution :
IN-IFIMUP, Univ. of Porto, Porto, Portugal
Abstract :
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.
Keywords :
Q-factor; copper; dielectric resonators; discs (structures); microstrip resonators; sapphire; Al2O3; Cu; Q-factor; WGM; conducting disc; continuous dielectric layer; copper disk; dielectric medium; microstrip circular resonator; microstrip whispering-gallery-mode resonator; microwave field; quality factors; resonance frequencies; single crystalline sapphire; Dielectrics; Metals; Microstrip resonators; Microwave theory and techniques; Optical resonators; Resonant frequency; Measurement and modeling; millimeter waves; planar structures; whispering gallery mode (WGM) resonators;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2015.2457898
