Composite source magnetoelectric antenna with self-biasing mechanism

This paper presents a low-frequency self-biased magnetoelectric (ME) antenna with enhanced radiation performance through synergistic operation with a coil resonant circuit. For a given drive voltage, the inductance of the series-resonant circuit can be optimized by adjusting the number of turns of the coil, thus enabling the circuit’s reactance to approach zero under optimal bias magnetic field conditions. This design enhances the antenna’s radiation performance and eliminates the need for external permanent magnets, simplifying the device structure and improving reliability. Experimental results indicate that the magnetic induction strength of the self-biased ME antenna is 3.17 times greater than that of conventional ME antennas, and the 3-dB bandwidth is significantly expanded at two different resonant frequencies, achieving increases of 4.32 and 7.09 times, respectively. Meanwhile, the magnetic induction intensity and antenna efficiency of Composite source radiation magnetoelectric (CSRME) antenna have been greatly improved.