Title :
Trapped-energy piezoelectric resonators with elliptical ring electrodes
Author :
Nakamura, Kiyoshi ; Yasuike, Ryoichi ; Hirama, Koichi ; Shimizu, Hiroshi
Author_Institution :
Tohoku Univ., Sendai, Japan
Abstract :
Trapped-energy piezoelectric resonators with elliptical ring electrodes conforming to the anisotropy in the piezoelectric plate are investigated. In this piezoelectric resonator, the electrode size can be arbitrarily large without causing inharmonic overtone resonances, and therefore the resonator has a low series resistance. Some resonators with elliptical ring electrodes have been fabricated using ceramic and AT-cut quartz plates. It is shown that these resonators have series resistances lower than those of conventional resonators
Keywords :
ceramics; crystal resonators; quartz; AT-cut quartz plates; anisotropy; electrode size; elliptical ring electrodes; low series resistance; piezoelectric plate; trapped energy piezoelectric resonators; Anisotropic magnetoresistance; Ceramics; Cutoff frequency; Electric resistance; Electrodes; Impedance; Partial differential equations; Product design; Resonance; Shape;
Conference_Titel :
Frequency Control, 1990., Proceedings of the 44th Annual Symposium on
Conference_Location :
Baltimore, MD
DOI :
10.1109/FREQ.1990.177522
