Abstract
The bulk acoustic wave (BAW) antenna suffers from eddy current loss as well as magnetic damping loss, which are important factors affecting the performance of the antenna. The Lorentz force generated from piezomagnetic layer during the radiation process of BAW antenna is solved based on the eddy current loss model constructed previously. Then a kinematic model of BAW antenna considering magnetic damping is constructed by introducing the acoustic resonance model. A finite element analysis (FEA) model for magnetic damping behavior of BAW antenna is developed to verify the analytical model. The results from the numerical simulation and the theoretical calculation are in good agreement, which verifies both the analytical model and FEA modeling method. Finally, the resonant displacement of BAW antenna with different thickness ratios of piezoelectric and piezomagnetic layers is studied by the verified kinematic model. It is found that the antenna has the maximum resonant displacement when the thickness ratio is 1:1.
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