High tuning coefficient whispering gallery modes in a sapphire dielectric resonator transducer

Author

Peng, H. ; Blair, D.G.

Author_Institution

Dept. of Phys., Western Australia Univ., Nedlands, WA, Australia

fYear

1994

fDate

1-3 Jun 1994

Firstpage

459

Lastpage

465

Abstract

A sapphire dielectric resonator transducer utilizes high tuning coefficient whispering gallery modes in a double disk resonator. The high tuning coefficients and high Q-factors of the whispering gallery modes allow the transducer to achieve very high sensitivity for displacement measurements. In this report, we present an improved mode matching method which can determine the resonant frequencies of the whispering gallery modes in double cylindrical dielectric disk resonators with high accuracy. Two double sapphire disk resonators with different dimensions have been tested to verify the theory. The comparison of the theoretical and experimental results is described. The frequency tuning behaviour of the whispering gallery modes is investigated

Keywords

dielectric resonators; displacement measurement; frequency stability; microwave parametric oscillators; sapphire; transducers; tuning; Al₂O₃; displacement measurement; displacement measurements; double cylindrical dielectric disk resonators; double disk resonator; frequency tuning; high Q-factors; sapphire dielectric resonator transducer; sapphire disk resonators; tuning coefficient; tuning coefficient whispering gallery modes; whispering gallery modes; Coupling circuits; Dielectrics; Mode matching methods; Q factor; Resonant frequency; Temperature sensors; Transducers; Tunable circuits and devices; Tuning; Whispering gallery modes;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1994. 48th., Proceedings of the 1994 IEEE International

Conference_Location

Boston, MA

Print_ISBN

0-7803-1945-1

Type

conf

DOI

10.1109/FREQ.1994.398297

Filename

398297