Title :
Nodal analysis of multitransducer SAW devices
Author :
Rukhlenko, Alexander S.
Author_Institution :
Dept. of Semicond. Phys., Byelorussian State Univ., Minsk, Byelorussia
Abstract :
A unified approach to the nodal analysis of multitransducer surface acoustic wave (SAW) devices is presented. Assuming a grounded SAW transducer to be reflectionless, analytic formulae for the nodal admittance matrix (NAM), interrelating currents and voltages on the electric ports are deduced. Diagonal NAM elements represent self-admittances of SAW transducers and can be calculated by applying known techniques of SAW transducer admittance calculation. Off-diagonal elements, accounting for acoustic interaction of the elemental SAW transducers, are deduced from the short-circuit currents induced in each grounded SAW transducer when only one SAW transducer of the system is activated, with all the others being grounded. The closed-form NAM allows to extend standard nodal analysis techniques for the electric networks to the acousto-electric circuits comprising both SAW devices as well as conventional electric components
Keywords :
electric admittance; equivalent circuits; interdigital transducers; multiport networks; network analysis; surface acoustic wave filters; surface acoustic wave transducers; IDT; acoustic interaction; acousto-electric circuits; admittance matrix; diagonal elements; dual-track filter; grounded SAW transducer; mixed scattering matrix; multitransducer SAW devices; nodal analysis; off-diagonal elements; self-admittances; short-circuit currents; three-port representation; unified approach; Acoustic transducers; Acoustic waves; Admittance; Band pass filters; Circuits; SAW filters; Surface acoustic wave devices; Surface acoustic waves; Ultrasonic transducers; Voltage;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495586
