Design and Synthesis of Acoustic Surface Wave Filters (Part A)

Abstract

<p> This report describes the basic physical properties of surface wave devices and design procedures necessary to realize filter functions from such devices. The mathematical form of the surface wave is presented. Filter models based on this wave are reviewed and the strong relationship between device geometry and resultant transfer functions is developed. </p> <p> Design and experimental procedures adopted for the synthesis of a surface-wave filter used for colour T.V. I.F. strips are given. Two such filters are actually made in the laboratory and experimental-theoretical results are compared. Results obtained indicate good agreement between theory and experiment, and clearly demonstrate the superiority of surface wave filters over conventional L-C filters in high frequency applications. </p>