On the Investigation of Magneto-Dielectric Antenna Characteristics by Utilizing Magnetic Material

This paper focuses on the investigation of magneto-dielectric antenna characteristics by utilizing a magnetic material, namely Yttrium Iron Garnet (YIG). This material is embedded inside Roger RO4003C dielectric substrates and arranged concentrically at the center of radiating patch element. With the inclusion of magnetic material, the size of microstrip antenna is 39.1 mm× 39.1 mm × 2.5 mm. The characterization of magneto-dielectric antenna is conducted on demagnetized condition without external magnetic bias. Moreover, a conventional microstrip antenna is also presented and compared with the magneto-dielectric antenna to observe its behaviour on the antenna performances. Characterization results show that with the inclusion of magnetic material, the resonant frequency of magneto-dielectric antenna could be tuned while maintaining its radiation characteristics. Meanwhile, a change in the gain performance is yielded due to magnetic loss produced by the magnetic material.