A Study of Unknown Resonance near Upper Stop Band for 43°In-Plane Rotated ST-Cut Quartz SAW Resonator

Abstract

An unknown resonance is studied, which exists near upper stop band of IDT reflection characteristics, for the 43° in-plane rotated ST-cut of quartz SAW resonator. In this study, we analyze the displacement loci of surface wave at first, and find that slight skew angles exist in them. Simple simulation model is introduced to analyze the phenomenon and anti-symmetric model of T matrix explains that phenomenon adequately.