ABSTRACT Leaky surface acoustic wave (SAW) interdigital transducers (IDT's) formed on 36o YX-LiTaO3 and 41× and 64× YX-LiNbO3 are theoretically analyzed, and a new equivalent circuit representation is proposed. The influence of the attenuation constant due to leakage as well as conductance caused by bulkwave radiation are taken into account in this paper. A new treatment based on an integral equation approach provides all circuit parameters. Fundamental experiments show fairly good agreement between theoretical and experimental results, confirming that this treatment provides very accurate tools for designing leaky-SAW devices.
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