Title :
Admittance matrix of a surface acoustic wave interdigital transducer
Author :
Soluch, Waldemar
Author_Institution :
Inst. of Electron. Mater. Technol., Warsaw, Poland
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;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
