Title :
Diffraction analysis of slanted finger interdigital transducers
Author :
Martin, Guenter ; Chen, Dongpei
Author_Institution :
Inst. for Solid State & Mater. Res., Dresden, Germany
Abstract :
For analysis, Slanted Finger Interdigital Transducers (SFIT) are usually divided into many channels in parallel to the propagation direction. Every channel is considered to be a subfilter. This procedure neglects the diffraction completely. The present paper introduces the diffraction in the SFIT analysis by use of the Angular Spectrum of Plane Waves (ASPW) approach. The analysis is based on a one component bulk wave model. The model is used for analyzing a unidirectional SFIT filter, the transducers of which are composed of SPUDT cells on 37° YX quartz. The simulated transmission behavior is compared with experimental results. Good agreement is found
Keywords :
acoustic wave diffraction; interdigital transducers; surface acoustic wave filters; 37 degree YX quartz; SPUDT cells; angular spectrum of plane waves approach; diffraction analysis; one component bulk wave model; simulated transmission behavior; slanted finger IDT; slanted finger interdigital transducers; unidirectional slanted finger IDT filter; Apertures; Band pass filters; Diffraction; Electrodes; Fingers; Passband; Reflection; Scattering; Transducers; Wideband;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922532
