Simple approach to the design of interface networks for acoustic-surface-wave filters

This letter shows that the transducers of an a.s.w. structure can be visualised as electrical transmission lines and that this approach can lead to design simplification and improved performance. Simple modification of the transducers makes the input impedance purely resistive. Computed and experimental results for quartz and lithium-niobate substrates show that the technique can provide a reduced insertion loss for dispersive structures.