Title :
Modular two-dimensional analysis of SAW filters. I. Theory
Author :
Visintini, Giuliano ; Baghai-Wadji, Mi-Reza ; Manner, Oswald
Author_Institution :
Siemens AG, Munich, Germany
Abstract :
An accurate simulation tool to meet the stringent requirements for broadband surface-acoustic-wave (SAW) filters is described. The primary goal was to develop a modular software tool in which first- and second-order effects can be easily modeled as separate modules providing an overall high-precision model for SAW devices. The model takes into account surface wave diffraction and refraction, quasi-two-dimensional static charge distribution, metal resistance and external load impedances. The angular spectrum of waves formalism is interpreted in such a way as to render possible the simultaneous description of all effects mentioned. A sample of the results is given for the potential distribution.<>
Keywords :
electric charge; surface acoustic wave filters; surface potential; ultrasonic diffraction; ultrasonic refraction; SAW filters; angular spectrum of waves formalism; broadband filters; external load impedances; metal resistance; modular 2D analysis; modular software tool; potential distribution; quasi-two-dimensional static charge distribution; simulation tool; surface wave diffraction; surface wave refraction; Anisotropic magnetoresistance; Diffraction; Filtering theory; SAW filters; Surface acoustic waves; Surface impedance; Surface resistance; Surface waves; Transducers; Transfer functions;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
