FBAR filter optimization method based on improved Mason model
An optimization method and filter technology, which is applied in the field of radio frequency filters, can solve problems such as cumbersome schematic diagrams, complex simulation circuit models, and insufficient inclusion of device thermal effects, and achieve simplified circuit design, reliable simulation results, and automatic tuning Effect
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[0039] Such as figure 1 As shown, the FBAR filter optimization method based on the improved Mason model of the present embodiment includes the following steps:
[0040] (1) Select the physical field to be simulated and build a three-dimensional model of the FBAR piezoelectric oscillator in the Comsol Multiphysics software, such as figure 2 shown. The thickness of the lower electrode layer, the thickness of the piezoelectric layer, and the thickness of the upper electrode layer are respectively set to 26.44 nm, 2.02 μm, and 29.29 nm.
[0041] (2) Set the boundary conditions and formulas to be applied in the simulation. The temperature was set at 20° C. on the upper and lower electrode layers, and the upper electrode layer was in free contact with air.
[0042] (3) The three-dimensional model is constructed by meshing, and the thermal model is obtained by using the free subdivision method of tetrahedral mesh and simulation.
[0043] (4) According to the improved Mason model...
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