Aspect ratio dependence of electromechanical coupling coefficient of piezoelectric resonators

被引：38

作者：

Kim, M ^{[1
]}

Kim, J

Cao, WW

机构：

[1] Penn State Univ, Inst Mat Res, University Pk, PA 16802 USA

[2] Pukyong Natl Univ, Dept Phys, Pusan 608737, South Korea

[3] Pukyong Natl Univ, Interdisciplinary Program Acoust, Pusan 608737, South Korea

[4] Pukyong Natl Univ, Interdisciplinary Program Vibrat Engn, Pusan 608737, South Korea

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 13期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1063/1.2053366

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The most important parameter characterizing a piezoelectric material is the electromechanical coupling coefficient, which specifies the conversion efficiency between electrical and mechanical energies for a given vibration mode. For the resonance along the poling direction, there are two coupling coefficients defined, i.e., k(t) and k(33), which are for resonators of the same mode but two extreme aspect ratios and they differ substantially. We have derived a unified formula for this coupling coefficient as a function of the vibrator aspect ratio. The unified formula can provide more accurate description to the effective coupling coefficient of resonators not satisfying the extreme aspect ratio requirements. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3