Title :
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
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;
Conference_Titel :
Frequency Control Symposium, 1994. 48th., Proceedings of the 1994 IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-1945-1
DOI :
10.1109/FREQ.1994.398297
