New types of saw reflector and resonator consisting of reflecting elements with alternative (Positive and negative) reflection coefficients

Abstract

New types of SAW grating reflector and resonator configurations are proposed which consist of reflecting elements with the opposite sign of the reflection coefficients, and which have the advantages of large reflectivity, wide stopband and small mode conversion into radiative bulk waves. The principles of operation and the possible configurations of the reflector are described. It is confirmed by experiments on metal strip gratings that the proposed configurations provide very efficient reflection characteristics and a small size resonator with very small capacitance ratio. © 1985 IOP Publishing Ltd.