Ka-band dual mode circularly polarized reflectarray

Abstract

A double layers dual mode circularly polarized (CP) reflectarray antenna operating in the ka-band is presented. The reflectarray is center fed by a circularly polarized horn. The antenna is analyzed numerically. Angular rotation technique for a crossed slot array element is used to make phase compensation. An excellent CP performance is achieved with high aperture efficiency and wide band gain bandwidth of 16.5 % for 1.5 dB gain variation.