Abstract
A complete circuit model of Surface Acoustic Wave (SAW) devices with straight interdigital transducers is presented. This equivalent circuit can be implemented in LTspice and contains variable design characteristics that can be easily changed to see their effect on the electrical response of the final SAW device design. Later a two port Surface Acoustic Wave device with 13-finger-IDT electrodes is fabricated and its electrical characterization is examined using a vector network analyzer. The test results are then compared with the equivalent circuits’ simulation output results for the verification. The results show an acceptable agreement between the experimental and simulation results for a wide frequency range. This paper offers an easy method to create an equivalent LTSpice model to determine the electrical response of a SAW device before fabrication. The model can also be used to simulate the behaviour of the circuits containing SAW devices using LTSPICE tool.
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