Surface Acoustic Wave Multielectrode Transducers

In the basic SAW transducer, the fingers are connected alternately to the two bus-bars. Interesting responses can be ob- tained if there are more than two fingers per fundamental acoustic wavelength, and the fingers are connected to the bus-bars in various ways. Several of these structures are discussed qualitatively. The transmission spectra obtained from these various schemes are con- firmed experimentally. Quantitative calculations of admittance are also performed for several transducer structures. The measured data agree well with calculations.