Fully Metallic Metamaterial Polarizer with 3D Printed Circular Polarised Pyramidal Horn Antenna for Millimetre Wave Applications

This paper presents a 3D-printed circular polarized pyramidal horn antenna based on a multi-layer, fully metallic, Frequency selective metasurface polarizer for millimeter-wave applications. The proposed polarizer consists of three alike metallic screens with periodically perforated cross and rectangular slots. the polarizer is placed at the top of the 3D-printed pyramidal horn antenna and simulated using a CST microwave solver. The designed antenna is found to operate from 29.9 GHz to 30.3 GHz with broadside realized gain of 19.3 dBi. The axial ratio bandwidth of 400 MHz and maximum realized gain reduction of 0.5 dB is achieved.