Adaptation multimode COM for Low-Cut TC-SAW device

This paper adapts the multimode Coupling-of-Mode (COM) model for low-cut Temperature Compensated Surface Acoustic Wave (TC-SAW) devices. The study focuses on devices based on -2° YX-cut lithium niobate substrates with Cu electrodes covered by a silicon oxide film. The interactions between the main Shear-Horizontal (SH) mode, the Rayleigh mode, and bulk acoustic waves (BAWs) are analyzed. The adaptation aims to approximate the frequency behavior of multimode COM parameters to enhance model accuracy.