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

Volume

42

Issue

4

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

717

Lastpage

725

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;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.393114

Filename

393114