Title :
A simple analysis of grating resonators by image parameter theory
Author :
Kojima, Toshihiro ; Kawai, Noriyuki
Author_Institution :
Fac. of Eng., Tamagawa Univ., Tokyo, Japan
Abstract :
A grating resonator consists of two identical gratings each of N s metal strips (or Ng grooves) which are separated by a quarter-wavelength distance. It behaves as a transmission cavity with high Q. This paper presents one method of theoretical analysis of the transmission characteristics of the grating resonators. In the analysis, the equivalent circuit model including important various effects such as mass/electrical loading (MEL) effects, energy storage effect and metallization effect (dependence on metallization ratios) is used. By application of the image parameter theory, the expressions for the transmission characteristics are derived in closed and simple forms. As an examples of numerical calculations, the transmission characteristics for the grating resonators on LiNbO3 (128° Y,X) are investigated
Keywords :
acoustic arrays; acoustic wave transmission; diffraction gratings; electric admittance; equivalent circuits; frequency response; numerical analysis; surface acoustic wave resonators; LiNbO3; LiNbO3 substrate; SAW device; admittance elements; closed form expression; energy storage effect; equivalent circuit model; frequency response; grating resonators; image parameter theory; mass/electrical loading effects; metal strip array; metallization effect; numerical calculations; quarter-wavelength distance separation; transmission cavity; transmission characteristics; Admittance; Circuit analysis; Concrete; Energy storage; Frequency; Gratings; Image analysis; Metallization; Strips; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-3615-1
DOI :
10.1109/ULTSYM.1996.583965
