3D modeling of BAW-based multiferroic antennas

The thin-film multiferroic bulk-acoustic-wave (BAW) antennas consisting of piezoelectric and magneto-elastic materials are modeled. The effect of ferromagnetic resonance (FMR) on the radiation efficiency is demonstrated. As the applied in-plane magnetic DC field aligns the FMR frequency of the magneto-elastic layer with that of the BAW resonance of the structure, peaks in radiation efficiency are observed. Benchmark against the conventional dipole antenna and Chu's limit validates the advantage of the multiferroic antennas. This work represents the first three-dimensional investigation in magneto-elastic coupling based thin-film multiferroic antennas for potential applications in electrically small antennas.