A Coupling-of-Modes model for SAW Transducers with Arbitrary Reflectivity Weighting
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.
This item is only available in print in the UCF Libraries. If this is your thesis or dissertation, you can help us make it available online for use by researchers around the world by downloading and filling out the Internet Distribution Consent Agreement. You may also contact the project coordinator Kerri Bottorff for more information.
Malocha, Donald C.
Doctor of Philosophy (Ph.D.)
College of Engineering
Length of Campus-only Access
Doctoral Dissertation (Open Access)
Orlando (Main) Campus
Abbott, Benjamin P., "A Coupling-of-Modes model for SAW Transducers with Arbitrary Reflectivity Weighting" (1989). Retrospective Theses and Dissertations. 5155.