Title :
A theoretical and experimental study of waveguide coupled SAW resonator filters
Author :
Xu, Yufeng ; Smith, Peter M.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
fDate :
7/1/1995 12:00:00 AM
Abstract :
The coupling-of-modes (COM) formalism is extended to include coupled transducers and applied to the modelling of surface acoustic wave (SAW) coupled resonator filters. The models do not require the derivation of equivalent circuits and they accommodate finger reflections, electromagnetic feedthrough and external matching circuits. Frequency responses for waveguide-coupled devices are computed and compared to experimental results. Longitudinal mode profiles within the resonant cavities are presented.<>
Keywords :
coupled mode analysis; frequency response; surface acoustic wave couplers; surface acoustic wave resonator filters; surface acoustic wave transducers; surface acoustic wave waveguides; coupled transducers; coupling-of-modes formalism; electromagnetic feedthrough; external matching circuits; finger reflections; frequency responses; longitudinal mode profiles; waveguide coupled SAW resonator filters; Acoustic transducers; Acoustic waveguides; Acoustic waves; Coupling circuits; Electromagnetic modeling; Electromagnetic waveguides; Resonator filters; Surface acoustic wave devices; Surface acoustic waves; Waveguide theory;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
