A novel chiral metamaterial circular polarizer based on e-shape structure

A double-band circular polarizer based on novel e-shape resonators is proposed and studied numerically. At two resonant frequencies, i.e., 11.65 GHz and 13.02 GHz, the incident linearly polarized wave can be transformed into left/right-handed circularly polarized waves, respectively. The proposed polarizer transmits a nearly pure circularly polarized wave, with the polarization extinction ratio more than 30 dB. Moreover, the surface current distributions are investigated to illustrate the polarization transformation mechanism. The proposed polarizer is compact with simple geometry, which is promising to be intergrated with electrical small antennas.