Printed Feed Network on a Single Surface for Dual Polarized Antenna Array

Abstract

A simplified packaged microstrip line (MSL) feeding network on a single surface for a dual-polarized array is presented. The MSL couples to a cross-slot-aperture of the antenna elements. A dual-polarized magneto-electric dipole is designed with two different types of feedlines. A Ka-band 4 × 4 dual-polarized array is designed. The array has better than 16 dBi gain with port isolation better than 30 dB and cross-polarization better that -20 dB within a 20% bandwidth. The presented feed scheme is valid for any dual-polarized array size.