Optimization of the parameters of an acoustic delay line by applying a rear acoustic load to a piezoelectric transducer

Abstract

The operation of a microwave piezoelectric transducer whose piezoelectric element is connected through a number of intermediate layers with two acoustic loads is investigated. One of the loads is the medium in which the transducer excites elastic waves, and the other (the rear load) serves for the formation of the transducer’s characteristics. On the basis of the previous numerical analysis of the transfer coefficients for the direct and inverse transformations, the frequency dependences of the transformation efficiency and the standing-wave ratios in the transmission line (the direct transformation) and in the sound duct (the inverse transformation) are calculated. The theoretical curves that illustrate the effect of the rear load on the characteristics of a specific multilayer transducer operating in the decimetric wave range with a matching LC circuit are discussed.