This work introduces a new method for suppressing transverse modes, which is achieved by reducing the SAW velocity at the end of the IDT electrodes through selective filling with SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2.</inf> And the dimensional parameters of the selected positions were optimized to suppress transverse modes in the passband without degrading their performance.
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Li et al. (2024) studied this question.
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