This invention is related generally to a dual polarized aperture coupled microstrip patch antenna system. A variety of aperture coupled patch antenna systems are available and known. Prior art dual polarization aperture coupled patch antenna systems suffer from either small bandwidth, poor cross polarization port-to-port isolation (about -20 dB) or require complicated and expensive feed structures including multiple feeding network layers or jumpers or crossovers.
Accordingly, a need arises for a dual polarized aperture coupled patch antenna system having an uncomplicated, inexpensive feeding structure with effective cross polarization port-to-port isolation.