Optimization of polarity weighted quasi-slanted IDTs

This paper is devoted to optimization of quasi-slanted interdigital transducers (IDT) that have some advantages over classical fan-shaped IDTs if few channels are used. Objects under optimization are electrode polarities, relative channel apertures, channel center frequencies and channel shifts. By varying the number of channels one can change the diffraction effect and transducer impedance at the same IDT aperture and length, which provides better matching with substrate features.