3D printed compact dual-polarized wideband antenna

Abstract

A novel compact dual-polarized unidirectional wideband antenna based on two crossed magneto-electric dipoles is proposed. The proposed miniaturization method consist in transforming the electrical filled square dipoles into vertical folded square loops. The surface of the radiating element is reduced to 0.23λ<;sub>0<;/sub>0.23λ<;sub>0<;/sub>, where λ<;sub>0<;/sub> is the wavelength at the lowest operation frequency for a standing wave ratio (SWR) <;2.5, which corresponds to a reduction factor of 48%. The antenna has been prototyped using 3D printing technology. The measured input impedance bandwidth is 51.2% from 1.7 GHz to 2.9 GHz with a Standing wave ratio (SWR) <;2.