Scanning window technique in SPUDT optimization

This paper is devoted to optimization of single-phase unidirectional transducers (SPUDT). The essence of the suggested algorithm is a consideration of all possible electrode combinations inside a local region that scans step by step throughout optimized transducers. The algorithm can keep control of filter parameters according to any desired priority scheme, i.e. provides a desired compromise between insertion loss, triple transit suppression, stopband rejection, in-band ripple, etc. Our EWC/SPUDT analysis is based on T-matrix approach (D.P. Morgan, IEEE Ultras. Symp. Proc., pp. 215-220, 1995).