A Coupling-of-Modes model for SAW Transducers with Arbitrary Reflectivity Weighting
Abstract
An accurate and numerically efficient model for SAW devices incorporating transducers with non-uniformly weighted internal reflections has been developed. The model describes each of the device's transducers using a three port characterization (two acoustic ports and one electric port). These three port descriptions are combined to obtain the complete device's description.
The three port description of a transducer is obtained by representing the response of the non-uniform transducer as that of a set of cascaded uniform sections. The three port solutions for a uniform section of transducer are presented as the results of a coupling-of-modes (COM) analysis. These solutions include the transducer's acoustic admittance, a quantity not previously documented in the literature.
For verification of the analysis technique, experimental results for a single phase unidirectional transducer (SPUDT) filter are presented. The filter's insertion loss, triple transit suppression, and out-of-band rejection are all found to agree well with the theoretical predictions.
Notes
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Graduation Date
1989
Semester
Fall
Advisor
Malocha, Donald C.
Degree
Doctor of Philosophy (Ph.D.)
College
College of Engineering
Department
Electrical Engineering
Format
Pages
139 p.
Language
English
Length of Campus-only Access
None
Access Status
Doctoral Dissertation (Open Access)
Location
Orlando (Main) Campus
Identifier
DP0026623
STARS Citation
Abbott, Benjamin P., "A Coupling-of-Modes model for SAW Transducers with Arbitrary Reflectivity Weighting" (1989). Retrospective Theses and Dissertations. 5155.
https://stars.library.ucf.edu/rtd/5155
Accessibility Status
Searchable text