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A Comparison of Surface Acoustic Wave Modeling MethodsSurface Acoustic Wave (SAW) technology is low cost, rugged, lightweight, extremely low power and can be used to develop passive wireless sensors. For these reasons, NASA is investigating the use of SAW technology for Integrated Vehicle Health Monitoring (IVHM) of aerospace structures. To facilitate rapid prototyping of passive SAW sensors for aerospace applications, SAW models have been developed. This paper reports on the comparison of three methods of modeling SAWs. The three models are the Impulse Response Method a first order model, and two second order matrix methods; the conventional matrix approach, and a modified matrix approach that is extended to include internal finger reflections. The second order models are based upon matrices that were originally developed for analyzing microwave circuits using transmission line theory. Results from the models are presented with measured data from devices.
Document ID
20090019738
Document Type
Conference Paper
Authors
Wilson, W. c.
(NASA Langley Research Center Hampton, VA, United States)
Atkinson, G. M.
(Virginia Commonwealth Univ. Richmond, VA, United States)
Date Acquired
August 24, 2013
Publication Date
May 3, 2009
Subject Category
Instrumentation And Photography
Report/Patent Number
LF99-8088
Meeting Information
Nanotech Conference and Exposition 2009(Houston, TX)
Funding Number(s)
WBS: WBS 645846.02.07.07.11.01
Distribution Limits
Public
Copyright
Public Use Permitted.

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