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Updated: Jul 7, 2026

Electric Cell-substrate Impedance Sensing for the Quantification of Endothelial Proliferation, Barrier Function, and Motility

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Published on: March 28, 2014

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

¹Fac. of Eng., Tohoku Univ., Sendai.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1993

Summary

The coupled-mode approach simplifies analysis of surface acoustic wave (SAW) devices. A new equivalent circuit model for interdigital transducers (IDTs) aids in understanding SAW device behavior.

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Area of Science:

Physics
Electrical Engineering
Materials Science

Background:

Surface Acoustic Wave (SAW) devices are crucial in modern electronics.
Periodic structures like reflectors and interdigital transducers (IDTs) are key components in SAW devices.
Accurate modeling of IDTs is essential for optimizing SAW device performance.

Purpose of the Study:

To derive relations for interdigital transducers (IDTs) using the coupled-mode approach.
To propose a simple distributed-parameter equivalent circuit for IDTs.
To demonstrate the application of this equivalent circuit in analyzing SAW devices.

Main Methods:

Utilizing the coupled-mode approach to derive equations for SAW device analysis.
Developing a distributed-parameter equivalent circuit model for IDTs.
Applying the proposed equivalent circuit to analyze specific SAW device configurations.

Main Results:

Established relations among terminal quantities (electrical and acoustical) for IDTs.
Introduced a simplified equivalent circuit model for the entire IDT.
Presented successful applications of the equivalent circuit in SAW device analysis.

Conclusions:

The coupled-mode approach provides an effective method for analyzing SAW periodic structures.
The proposed equivalent circuit offers a practical tool for understanding and designing IDTs and other SAW devices.
This modeling approach facilitates the analysis and optimization of surface acoustic wave devices.