Simulation of surface acoustic wave resonator
Abstract
A mathematical model is presented of a surface acoustic wave (SAW) resonator. The model represents two SAW reflection gratings forming an acoustic cavity and an interdigital transducer placed between them to couple energy into and out of the cavity in matrix form. The transmission matrix of the transducer is formed by the cascading of the crossedfield and transmission line models obtained from the Mason equivalent circuit, while the acoustic response of a metal strip reflection grating is modeled by the transmission line model. The model derived is applied to a resonator based on a LiNbO3 substrate with aluminum metalization to obtain values of the real electrical admittance and phase response of the resonator as a function of frequency around the center frequency of 50 MHz. Further possible applications include the prediction of the responses of complicated interconnections of transducers and gratings, and the verification of filter designs and procedures.
 Publication:

SOUTHEASTCON '81; Proceedings of the Region 3 Conference and Exhibit
 Pub Date:
 1981
 Bibcode:
 1981ieee.conf..549D
 Keywords:

 Cavity Resonators;
 Microwave Transmission;
 Network Analysis;
 Strip Transmission Lines;
 Surface Acoustic Wave Devices;
 Lithium Niobates;
 Mathematical Models;
 Transmission Circuits;
 Electronics and Electrical Engineering