Characteristics Enhancement of A Magneto-Dielectric-Based Patch Antenna by Incorporating Ferrite Material

This paper deals with the characteristics enhancement of circular polarization on a magneto-dielectric-based patch antenna. It is realized by incorporating a ferrite material, i.e., Yttrium Iron Garnet (YIG), inside the second layer of FR-4 epoxy dielectric material, while the square patch is fed directly through a coaxial probe connector. The proposed magneto-dielectric-based patch antenna is characterized under the demagnetized state, where the total magnetization is solely contributed by the internal magnetization within the ferrite material. From the measurement results, it is shown that the proposed patch antenna can operate at the desirable resonant frequency with the impedance bandwidth of 3.98%. Furthermore, the proposed patch antenna configuration with the inclusion of ferrite material also exhibits the 3-dB axial ratio bandwidth up to 5.5%.