Design of a Dual-Polarized Crossing Perpendicular-Corporate-Feed Waveguide 2 × 2-Slot Sub-Array Antenna

This paper describes the design of a dual-polarized crossing perpendicular-corporate-feed waveguide 2× 2-slot subarray antenna. The proposed antenna has two layers of feeding circuits for each polarization. The two feeding circuits are crossing at 90 degrees. The overlapping bandwidth of the simulated reflection between vertical and horizontal polarization is 9.9% for VSWR < 1.5. The isolation of more than 55dB is obtained within the bandwidth.