부산대학교 도서관

Acoustically driven magnetoelectric (ME) antenna operating at low frequency reduces the antenna size and enhances the transmission efficiency significantly compared to electric antennas. This study reports a 2-D electro-magneto-elastic equivalent circuit model and experimental verification of nonvolatile pattern reconfigurable ME antenna (i.e., Ni/Metglas/ PZT/Metglas/Ni) for the first time. The proposed ME antenna modulates the magnetic moment oscillation with an adjustable built-in magnetic field, which results in a nonvolatile reconfigurable pattern. Specifically, the proposed model is constructed with constitutive equation characterizing 2-D stress coupling, magnetic charge theory, 2-D Newton’s equation, and Maxwell’s equations. Both the theoretical model and experiment indicate that the proposed antenna could provide nonvolatile reconfigurable B-field patterns within 360° with gain ranging between −121.3 and −120.6 dBi. The antenna with aspect ratio of around 1 facilitates the reconfigurability of pattern due to more convenient modulations, which provides the robust communication performance at various scenarios.