Admittance matrix of a surface acoustic wave interdigital transducer

Author

Soluch, Waldemar

Author_Institution

Inst. of Electron. Mater. Technol., Warsaw, Poland

Volume

40

Issue

6

fYear

1993

Firstpage

828

Lastpage

831

Abstract

The admittance matrix of a surface acoustic wave interdigital transducer (IDT) is derived from the impulse response model and circuit theory. It is shown, that Y/sub 23/=Y/sub 13/ for a symmetrical IDT and Y/sub 23/-Y/sub 13/ for an antisymmetrical one. A simple algorithm for the input admittance calculation of apodized IDTs is given. The proposed algorithm is also capable of analyzing withdrawally weighted, withdrawally weighted and apodized, and unapodized IDTs. Calculations of an apodized IDT input admittance are compared with measurements.<>

Keywords

circuit theory; piezoelectric transducers; surface acoustic wave devices; transient response; ultrasonic transducers; admittance matrix; algorithm; apodized IDT input admittance; circuit theory; impulse response model; surface acoustic wave interdigital transducer; symmetrical IDT; Acoustic measurements; Acoustic transducers; Acoustic waves; Admittance measurement; Algorithm design and analysis; Circuit theory; Equivalent circuits; Surface acoustic waves; Symmetric matrices; Voltage;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.248230

Filename

248230