Investigation of Magneto-dielectric Material Properties Using Substrate Integrated Waveguide Structure

This paper discusses the investigation of magneto-dielectric material properties composed of a resonator and a Yttrium Iron Garnet (YIG) material using Substrate Integrated Waveguide (SIW) structure. The investigation results are expected to be applicable enhancing the performance of SIW-based and other radio frequency devices. To investigate its properties, simulation and experiment are conducted using a three-layer SIW structure. Meanwhile, to enhance the performance, a 48 wires-made resonator is utilized and incorporated onto the SIW structure. The research findings indicate that the SIW structure with resonator exhibits a single resonant peak at the frequency of 2.95 GHz. This peak appears due to the increase of electric field from the resonator and the reinforcement of electric field produced by the SIW structure. Furthermore, by incorporating YIG material together with the resonator onto the SIW structure, an additional resonant peak is yielded at the frequency of 1.65 GHz. It is noteworthy that this resonant peak is obtained without an external magnetic field. The increase of external magnetic field intensity will activate the magnetic properties of YIG material. The stronger the magnetic field from YIG material as the increase of external magnetic field intensity, the further the resonant peak shifts toward higher frequencies. This means that the proposed SIW structure is capable to characterize the properties of magneto-dielectric material, where the resonator contributes in enhancing the electric field at the frequency of 2.95 GHz, and the YIG material provides in strengthening the magnetic field at the frequency of 1.65 GHz.