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In the present work, nonlinearities in temperature compensating (TC) SAW devices are investigated. The materials used are LiNbO3-rot128YX as the substrate and Copper electrodes covered with a SiO2-layer as the compensating layer. In order to understand the role of these materials for the nonlinearities in such acoustic devices, a FEM simulation model in combination with a perturbation approach [1]...
Periodic arrays of metallic patches on the electrodes of a “Rayleigh-type SAW resonator” are investigated to suppress undesired modes above resonance frequency. Both, the metallization ratio(ηt) and the period (PL) of the patches in transversal direction, were varied. Simulations were performed employing the well established 2D P-matrix model.
In this paper, the combining of Finite Element Analysis and Boundary Element Method is investigated to address non periodic Surface Acoustic Wave devices. The validation of this method is achieved by comparison with proofed numerical method. Preliminary computations on passivation influence are given.
Classical finite element methods are only capable of describing a limited computation area; the substrate of a micro-acoustic device must therefore be described by suitable boundary conditions. This is obtained by absorbing boundary conditions (ABC) or perfectly matched layers (PML) which both suppress reflections from the substrate. PML was implemented into a high-performance finite element code...
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