Antenna Miniaturization Using High-Permittivity and Magneto-Dielectric Substrates in VHF-UHF Bands: A Comparative Study

In this paper, we study the effect of high-permittivity and magneto-dielectric host substrates on performance metrics such as radiation efficiency, gain, and bandwidth while miniaturizing the antenna by a same miniaturization factor. The antenna is designed to operate at 300 MHz band. For comparison purposes, different substrates including regular dielectric, high-permittivity dielectric, and magneto-dielectric are investigated, and their performances are evaluated at the operating frequency. The obtained values for the radiation efficiency, gain, and bandwidth of the antenna on high-permittivity material are 0.25 %, −21 dBi, and 3.04%, respectively. The corresponding values for the antenna on magneto-dielectric material are 1.28 %, −13.86 dBi, and 4.75 %.