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

Print

Pages

139 p.

Language

English

Length of Campus-only Access

None

Access Status

Doctoral Dissertation (Open Access)

Location

Orlando (Main) Campus

Identifier

DP0026623

Accessibility Status

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