Design of a Miniature Circularly Polarized Antenna Operating in Three Frequency Bands Using a Polarized Ferrite Material

The purpose of this article is to show the strong potential of ferrite materials to improve antennas performances. Indeed, the combination of circular polarization with miniaturization and multiband frequency operation makes ferrites the ideal solution to optimize antenna's characteristics. In this work, the complete development of a miniature antenna having dimensions of (λ
₀
/9.6)×(λ
₀
/9.1)×(λ
₀
/27.4) at 3.13 GHz, operating over three frequency bands, and having a circular polarization is detailed. The benefit of incorporating such ferrite materials within an antenna on the radiation efficiency, the impedance bandwidth, and the axial ratio is presented. The prototype measurement will validate this development and the simulation results.