A comparative study of surface acoustic wave correlators

Abstract

In this paper, a comparative study for effects of different temperatures or frequency shifts on the response of surface acoustic wave (SAW) correlator is given. In this study, a computer algorithm has been developed to estimate and model the main characteristic parameters of SAW correlator. The detailed parameters of SAW correlator such as different substrates and different codes has been also computed and presented. The results obtained in this work, provide an adequate basis for understanding the parameters effects, and to aid in the optimization processes of SAW correlator based upon these effects. The aim of modeling SAW correlators is to replicate the actual behavior of the device. Manufacturing a correlator to specifically realize a different configuration is both expensive and time consuming. With the continuous improvement in computing capacity, switching to the discussed modeling in this paper would be more appropriate. This modeling approach allows the consideration of different code implementation and device structures. This is demonstrated through simulation results for some Barker sequence encoded SAW correlator.

Keywords: Surface acoustic wave, correlators, inter-digital transducer..