Frequency Tunable Ferrite Based Metamaterial for Linear-to-Circular Polarization Conversion

This paper presents a frequency tunable ferrite based metamaterial which can operate as a transmission type linear-to-circular polarization converter when it stays in a static magnetic bias field H0. When the magnetic field intensity H
₀
varies from 2×10
⁵
to 3.05×10
⁵
A/m, the operational band can be tuned from 7.2 to 10.9 GHz, while the transmission coefficients are better than -1 dB. The tuning bandwidth of the proposed frequency configurable ferrite based metamaterial is 40.9%, and the thickness of proposed prototype is only 0.057 λ0.