A simple equivalent circuit for interdigital transducers based on the coupled-mode approach

Author

Nakamura, Kiyoshi

Author_Institution

Fac. of Eng., Tohoku Univ., Sendai, Japan

Volume

40

Issue

6

fYear

1993

Firstpage

763

Lastpage

767

Abstract

The coupled-mode approach is a powerful tool for analyzing surface acoustic wave (SAW) periodic structures such as reflectors and interdigital transducers. The relations among the terminal quantities at two acoustical ports and one electrical port of an interdigital transducer (IDT) are derived from coupled-mode equations. A simple distributed-parameter equivalent circuit representing the entire IDT is proposed. A few examples of applications of this equivalent circuit to analysis of SAW devices are presented.<>

Keywords

equivalent circuits; piezoelectric transducers; surface acoustic wave devices; ultrasonic transducers; IDT; SAW device analysis; acoustical ports; coupled-mode equations; distributed-parameter equivalent circuit; electrical port; interdigital transducer; reflectors; surface acoustic wave periodic structure; terminal quantities; Acoustic transducers; Acoustic waves; Circuit analysis; Coupling circuits; Electrodes; Equations; Equivalent circuits; Periodic structures; Surface acoustic wave devices; Surface acoustic waves;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.248221

Filename

248221