Temperature field coupled surface acoustic wave resonator calculation method

Abstract

The invention discloses a temperature field coupled surface acoustic wave resonator calculation method, which comprises the following steps of: 1) coupling temperature fields into a piezoelectric physics field to obtain a mathematical model for representing multi-physics field coupling of a surface acoustic wave resonator under the action of different temperature fields; 2) solving the mathematical model of multi-physics field coupling through a finite element FEM technology to obtain a finite element model of a temperature field quantity coupled multi-physics field surface acoustic wave resonator single-finger structure; 3) extracting a system matrix of a single-finger structure finite element model of the surface acoustic wave resonator, and obtaining a matrix equation of the surface acoustic wave resonator with a finite length structure at different temperatures through a finite element hierarchical cascading technology based on acceleration of a graphic accelerator. Therefore, rapid calculation of the frequency response characteristic curve of a surface acoustic wave resonator with a finite length structure at different temperatures is realized. According to the method, rapid and accurate calculation of a surface acoustic wave resonator with a finite length structure under different temperature conditions can be realized.

Description

technical field [0001] The invention relates to the technical field of surface acoustic wave electronic devices, in particular to a calculation method for a surface acoustic wave resonator coupled with a temperature field. Background technique [0002] As the foundation and key of national defense industry and mobile communication, RF front-end is the core component of military radar, satellite communication electronics and mobile terminal products. Because surface acoustic wave devices have the characteristics of small size, good consistency, high reliability, low loss, and good filtering performance, surface acoustic wave devices have become the most mainstream RF front-end filters for military radar, satellite communication electronics, and mobile terminals. [0003] In the prior art, calculation and analysis methods for surface acoustic wave resonators with finite length structures mainly include accurate numerical solutions (finite element FEM method, FEM / BEM, etc.) and...

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Problems solved by technology

[0003] In the prior art, calculation and analysis methods for surface acoustic wave resonators with finite length structures mainly include accurate numerical solutions (finite element FEM method, FEM / BEM, etc.) and phenomenological model methods (COM theory, equivalent circuit model, etc. ), but at present, these analysis methods often only consider the piezoelectric physical field (namely, the two physical fields of the acoustic field and the electric field), and do not couple the temperature field of the device, so it is impossible to realize the finite-length structure under different temperatures. Calculation Analysis of Surface Acoustic Wave Resonator

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