Title :
A COM analysis of SAW waveguide-coupled resonator filters
Author :
Xu, Yan ; Smith, P.M.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont.
fDate :
31 Oct-3 Nov 1993
Abstract :
A new method of analyzing surface acoustic wave waveguide-coupled (WGC) resonator filters using the coupling-of-modes (COM) technique is presented. General COM equations for the coupled transducers and coupled reflectors are derived. The mechanism of coupling is described by using the coupling of waves in the opposite directions within one track and the coupling of waves in the same direction between two adjacent tracks. The reflection, transduction, attenuation and coupling between two tracks are included in the model. Closed form solutions for the case of uniform coupled transducers and coupled gratings are obtained. A model based on the above analysis is developed for two-pole WGC resonator filters, and Y-parameters are obtained from this model. Computed results are shown to agree with experimental work
Keywords :
acoustic resonators; piezoelectric transducers; surface acoustic wave filters; ultrasonic transducers; SAW waveguide-coupled resonator filters; Y-parameters; attenuation; coupled gratings; coupled transducers; coupling-of-modes; reflection; surface acoustic wave waveguide-coupled resonator filters; transduction; two-pole; Acoustic transducers; Acoustic waveguides; Acoustic waves; Attenuation; Closed-form solution; Equations; Gratings; Reflection; Resonator filters; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1993.339707
