Surface acoustic wave device performance analysis method based on hybrid algorithm

Abstract

The invention discloses a surface acoustic wave device performance analysis method based on a hybrid algorithm. The surface acoustic wave device performance analysis method comprises the following steps: 1) coupling a temperature field into a piezoelectric physical field in the forms of thermal stress and thermal strain; 2) solving a mathematical model through a finite element FEM technology to obtain a finite element model of the coupling temperature field quantity; 3) through a finite element model order reduction technology based on graphic accelerator acceleration and a periodic boundary condition, eliminating a degree of freedom which does not need attention in the finite element model; 4) obtaining performance parameters of the multi-physical field coupling surface acoustic wave device by using a biological intelligent optimization algorithm; and 5) taking the performance parameter solved by the biological intelligent optimization algorithm as an initial solution, and obtaining an accurate solution of the performance parameters of the surface acoustic wave device by using a one-dimensional search algorithm. According to the scheme, the error between the performance of a designed surface acoustic wave device and an actual product can be effectively reduced, and meanwhile, the time consumed in the calculation process and the occupied computer memory resources are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of surface acoustic wave electronic devices, in particular to a performance analysis method for surface acoustic wave devices based on a hybrid algorithm. 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 devices with finite length structures mainly include accurate numerical solutions (finite element FEM method, FEM / BEM, etc.) and ph...

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Problems solved by technology

[0003] In the prior art, calculation and analysis methods for surface acoustic wave devices 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.) , in the performance analysis methods of surface acoustic wave devices in the prior art, only the piezoelectric physical field (that is, the two physical fields of the acoustic field and the electric field) is often considered, which leads to insufficient consideration of factors in the actual design so that the designed surface acoustic wave There is a large error between the performance of the device and the product; at the same time, in the prior art, although COM theoretical methods and precise theoretical FEM / BEM, pure finite element FEM methods can be used for performance analysis of SAW devices, but for different The topology calculation needs to consume a lot of computing time and occupy more computer memory resources

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