浮动电极单向换能器研究
首发时间:2018-05-04
摘要:本文运用有限元方法对浮动电极单向换能器浮动电极单向换能器研究(FEUDT)结构进行建模。通过模态分析证明FEUDT结构激励的声表面波(SAW)是瑞利(Rayleigh)波;通过计算FEUDT结构的位移及能量密度,证明了FEUDT结构具有单向性。本文创新性的将FEUDT应用到具有两个输出端的延迟线模型中进行仿真,通过比较左右两个输出端插损的大小,说明采用FEUDT结构的SAW器件可以有效地减小插入损耗,为制造出插损更小的SAW器件提供理论指导。
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Analysis on Floating Electrode Unidirectional Transducer
Abstract:Floating electrode unidirectional transducer (FEUDT) structures are modeled by the finite element method in this paper. The modal analysis proves that the surface acoustic wave (SAW) excited by the FEUDT structure is a Rayleigh wave. By calculating the displacement and energy density of the FEUDT structure, it is proved that the FEUDT structure has unidirectionality. Then FEUDT is innovatively applied to a delay lines model which have two outputs. By comparing the insertion loss of the left and right outputs, it shows that the SAW device with FEUDT structure can effectively reduce the insertion loss which provides theoretical guidance for making SAW devices with less insertion loss.
Keywords: SAW FEUDT Insertion loss FEM
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