Coupled-Mode Equations for Interdigital Transducers for Leaky Surface Acoustic Waves
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概要
- 論文の詳細を見る
Coupled-mode equations are presented for an interdigital transducer for leaky surface acoustic waves (LSAWs). We introduce two immittance elements: the real parts of two immittances represent the propagation loss due to back-scattered bulk waves and the radiation loss due to bulk waves excited by electrodes; the imaginary parts represent the energy storage effect due to nonradiated bulk waves. Assuming that the immittances can be approximated with functions of frequency which were proposed by Abbott and Hashimoto for the coupling coefficient between LSAWs and bulk waves under shorted gratings, we demonstrate good approximations of dispersion curves for infinite shorted and open gratings on a 36° $Y$-$X$ LiTaO3 substrate.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2003-05-15
著者
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Koshiba Masanori
Graduate School Of Engineering Hokkaido University
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Hasegawa Koji
Muroran Institute Of Technology
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Koshiba Masanori
Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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Hasegawa Koji
Muroran Institute of Technology, Muroran 050-8585, Japan
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