Millimeter-wave circularly polarized holographic antenna based on artificial impedance surface

Abstract:

A novel circularly polarized holographic antenna is proposed at 35 GHz based on optical holographic principle. The antenna is composed by sources and an interference plane which is based on quasi-periodically artificial impedance surface. The surface impedance of scalar artificial impedance surface is analyzed by transverse resonance technique. In order to achieve circular polarization, a phase modulation is introduced into the function of the interference plane impedance. The antenna radiates circularly polarized wave from linearly feed. As an example, a circularly polarized holographic antenna is simulated. The results indicate that the beam deflects 35° along z axis, and the axial ratio is below 1.5 dB at 35 GHz center frequency.