研究目的
To develop a new finite element based method for rapid simulation of filter response under high power that accounts for 3D temperature distribution and heat flow in BAW filters.
研究成果
The developed FEM-based techniques provide accurate prediction of filter response under high power, enabling rapid design of HPUE capable filters with minimal calibration and good agreement with measurements.
研究不足
The isothermal segmentation method lumps ohmic losses and may not account for spatial distribution if it deviates from acoustic/dielectric losses; full-wave method is computationally intensive; methods assume certain conditions like piston mode operation.
1：Experimental Design and Method Selection:
A hybrid approach using 1D piezoelectric equations and 3D thermal equations in FEM, with three variations: isothermal segmentation, quasistatic effective conductivity, and full-wave effective conductivity methods.
2：Sample Selection and Data Sources:
An example filter die geometry defined by GDS layout file and linear ADS circuit model.
3：List of Experimental Equipment and Materials:
Not specified in the paper.
4：Experimental Procedures and Operational Workflow:
Scripted model generation from layout and circuit files, solving coupled equations iteratively, comparing to thermal IR measurements.
5：Data Analysis Methods:
Comparison of simulation results with thermal IR measurements for temperature profiles and S-parameters.
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