A 3D Printed Polarizer and Its Application for Circularly Polarized Fabry-Pérot Antenna Design

This paper presents a new structure of 3D printed polarizer for millimeter-wave (MMW) Fabry-Pérot Cavity (FPC) antenna design. By employing a polarizer with integrated PRS, FPC antenna can achieve circularly polarized (CP) radiation while maintaining high gain and wide bandwidth characteristics. The proposed polarizer is formed by several grating dielectric and air slabs with an inserted PRS. The dielectric polarizer which realized by 3D printed technology, contribute to 90° phase difference of two orthogonal E fields, resulting in CP performance. The PRS part is used to form FP cavity, resulting in high gain performance. The polarizer is placed over a PCB based feeding source with a quasi-curve reflector using stepped PCB substrates. For validation, a FPC antenna with the proposed PRS integrated 3D printed polarizer operating at 60 GHz is design. Simulated results show that the proposed antenna is a promising candidate for MMW communications.