In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3499-3499
Abstract:
Surface acoustic wave (SAW) devices have been extensively applied as the core components of modern mobile communication systems. In the fierce competition, developing precise and fast simulation models is very important. The widely-used coupling-of-modes (COM) model has been improved for many times, but it is still not satisfied yet. The fatal problem of extracting frequency-dependent COM parameters is that the reflection coefficient and the propagation velocity could not be obtained independently. In this work, a new method to evaluate all the frequency-dependent COM parameters is proposed. Using the FEM/BEM tool, the field distributions (including mechanical displacements and potential distribution) of forward and backward surface acoustic waves within periodic gratings of finite length could be calculated at every frequency. From the characteristics of the field distribution curves, all the COM parameters are evaluated as functions of frequency, and in particular, the reflection coefficient and the propagation velocity are extracted independently. Using these frequency-dependent COM parameters, the one-port resonators on the substrates of 128° YX-LiNbO3, ST-Quartz and 42° YX-LiTaO3 are simulated, which show good agreement with the results by FEM/BEM. The results verify the validity of the method. This work is supported by Natural Science Foundation of China under Grant No. 10774073 & 11174143.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2012
detail.hit.zdb_id:
1461063-2
detail.hit.zdb_id:
219231-7
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