Title :
The coupling-of-modes approach to the analysis of STW devices. II
Author :
Strashilov, Vesseline L. ; Djordjev, Kostadin D. ; Yantchev, Ventzislav M.
Author_Institution :
Dept. of Solid State Phys. & Microelectron., Sofia Univ., Bulgaria
Abstract :
For pt. I see ibid., vol. 44, no. 3, p. 652-7 (1997). The method for analyzing surface transverse wave (STW) devices by using a coupling-of-modes (COM) formalism has been completed, covering the STW electromechanical coupling coefficient (ECC). An ECC analytical formula has been derived by fitting numerical results from STW effective permittivity analysis. The ECC exhibits frequency and mass-loading variation. Using this new result, a satisfactory agreement with available experimental frequency characteristics of STW two-port quartz resonators has been achieved, without the necessity of additional experimental information. In its present form, the method is self-consistent and applicable to arbitrary STW layouts.
Keywords :
coupled mode analysis; permittivity; surface acoustic wave resonators; STW devices; arbitrary STW layouts; coupling-of-modes approach; effective permittivity analysis; electromechanical coupling coefficient; mass-loading variation; surface transverse wave devices; two-port quartz resonators; Algorithm design and analysis; Couplings; Frequency; Gratings; Permittivity; Strips; Surface acoustic waves; Surface fitting; Surface waves; Tin;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
