Low-Profile and Broadband Ferrite-Loaded Antenna for VHF/UHF Applications

A ferrite-loaded dipole antenna with wideband and low profile is proposed for VHF/UHF applications. The ferrite used in this paper is a kind of novel magneto-dielectric material with high and matched permittivity and permeability. Through the material loading, the interference of ground plane is effectively suppressed, and thus the antenna profile is reduced significantly. Furthermore, the antenna bandwidth is expanded to lower frequency band due to the high magneto-dielectric property of the ferrite. The optimized antenna obtains a profile of
$0.08 \lambda_{0}$
, a −10 dB impedance bandwidth of 107.7% (150–500 MHz), and a peak gain of 6.2 dBi.