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A technology of acoustic wave device and unit block, applied in the field of fast and high-precision full finite element surface acoustic wave simulation
Pending Publication Date: 2021-10-22
MURATA MFG CO LTD
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This may be impractical for many applications, especially since repeated re-simulations would be required as the design is updated or modified
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[0152] A hierarchical cascade algorithm is implemented on a commercial Matlab platform using a custom mesh generation algorithm and a FEM engine. Mesh generation is based on a modified version of Chew's second Delaunay refinement algorithm; in particular, mechanisms are introduced to relax the mesh fidelity criteria within the film. Use triangular meshes near the electrodes: The increased element density around the electrode corners is very useful for modeling the charge density distribution, which improves the accuracy of the simulated capacitance. Such as Figure 2B As shown, the mesh further from the surface is regular and consists of quadrilateral elements. Simulation speeds are reported for an old desktop computer (CPU i7-2600k, 3.4GHz, 32GB RAM), with calculations distributed across four parallel threads.
[0153] A. 42°YX cut LiTaO 3 2D synchronized resonators on
[0154] The first example is a 42°YX cut LiTaO 3 A synchronous resonator on a substrate with the follo...
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Abstract
The present disclosure provides systems and methods for scalable and parallel computation of hierarchical cascading in finite element method (FEM) simulations of surface acoustic wave (SAW) devices. Different computing units of a cluster or cloud service may be assigned to independently model different core blocks or combinations of core blocks for iterative cascading to generate a model of the SAW devices. Similarly, frequency ranges may independently be assigned to computing units for modeling and analysis of devices, drastically speeding up computation.
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[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application No. 62 / 778,129, filed December 11, 2018, entitled "Fast, Highly Accurate, Full-FEMSurface Acoustic Wave Simulation"; also claims filing October 15, 2019 Priority to U.S. Provisional Patent Application No. 16 / 653,743, entitled "Hierarchical Cascading in FEM Simulations of SAWdevices," as a continuation-in-part, U.S. Provisional Patent Application No. 16 / 653,743 claimed on December 11, 2018 U.S. Provisional Patent Application No. 62 / 778,168, entitled "Hierarchical Cascading in FEMSimulations of SAW Devices," also claims priority to U.S. Provisional Patent Application No. 62 / 778,168, filed January 13, 2017, and entitled "Hierarchical Cascading in Two-Dimensional FiniteElement Method Simulation of Acoustic Wave Filter Devices," U.S. Provisional Patent Application No. 15 / 406,600, as a continuation-in-part, claims U.S. Provisional Patent Application No. 15 / 406,600...
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