Design of a Butterfly Shaped Reflective Multifunctional Polarization Converter

Abstract

In this paper, we introduce a butterfly shaped ultra-thin reflective multifunctional polarization converter. It is capable of cross-polarization conversion and linear circular polarization conversion in multiple frequency ranges. High-efficiency cross-polarization conversion occurs in (6.40-8.45 GHz) and (18.3-24.94 GHz) in these frequency ranges. In these two frequency bands, we can see that the polarization conversion rate exceeds 90%. Linear circular polarization conversion is realized at (9.19-16.4 GHz), at the same time the axial ratio (AR) value is always kept less than 3dB in this frequency range, and the relative bandwidth reached 56.35%. The design also maintains stable performance at incident angles less than 30°.