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- W2768355647 abstract "SAW filter technology includes different substrates, multilayered electrodes from Al, Cu, Pt, …, dielectric sublayers and over-layers, etc. Temperature compensated SAW filters have been developed that have performance competitive with FBARs. Traditional design tools, such those as based on COM models, demand experimental characterization of wave propagation parameters. FEM/BEM models cannot be easily adopted to new substrates and calculations are slow. The advantage of FEM methods is their remarkable generality. FEM can handle arbitrary materials and crystal cuts, different electrode shapes, and structures including multiple metal and dielectric layers. The main challenge in applying FEM to SAW devices has been unacceptably long computation times. Recently, we proposed “hierarchical cascading” FEM software called “Layers” [1], suitable for simulating any 2D SAW device with hundreds of electrodes with a speed of 1sec.–4 sec. per frequency point on a 32 processor PC. Note that exact acoustic and electric field distributions can be calculated for all points of the device. A 5-IDT CRF/DMS TC SAW filter has been simulated using “Layers” [1]. In addition to the 10-port electrical network parameters for the filter, a visualization of acoustic field and power flow is presented (Fig. 1). Simulation reveals the resonances in the structure, radiation of energy at the interfaces between IDTs, and the origin of notches in passband including parasitic acoustic modes." @default.
- W2768355647 created "2017-12-04" @default.
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- W2768355647 date "2017-09-01" @default.
- W2768355647 modified "2023-09-25" @default.
- W2768355647 title "FEM modeling of an entire 5-IDT CRF/DMS filter" @default.
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- W2768355647 doi "https://doi.org/10.1109/ultsym.2017.8091538" @default.
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