A Theoretical Investigation of Three-dimensional All-dielectric Dual-band Polarization Based on Multi-folds Arrow Structure

In this work, an all-dielectric three-dimensional (3D) dual-band polarization conversion device was proposed, the proposed device was designed by multi-folds arrow structure under the copper background. The proposed device can offer two line-line polarization conversion bands via a single simple structure, the dual-band including a wideband (FBW = 24.58%) and a narrow band (FBW = 4.77%), the polarization conversion rate (PCR) of two bands can reach to over than 95% by adjusting the parameters of the structure.