Patch Antenna of Dual Polarization with Complementary Feeds: - a design for high isolation between the two ports and a radiation of low cross-polarization from each port

Port isolation below -35 dB in a 2 port patch antenna, is normally difficult. With 2 feeds complementary designed for good physical separation and low high-mode generation however, the port isolation reaches -55 dB in computation and -45 dB in a hardware experiment