Waveguide feed network architecture for wideband, low profile, dual polarized planar horn array antennas

An antenna array comprising:

• an array of antenna elements comprising:
• a plurality of septum polarizers dividing common waveguides into first waveguides associated with a first polarization and second waveguides associated with a second polarization, wherein each of a first set of the plurality of septum polarizers has the same orientation and is inverted by rotation around a longitudinal axis of the plurality of septum polarizers relative to each of a second set of the plurality of septum polarizers to form first groups of four adjacent first waveguides of the first waveguides, and to form second groups of four adjacent second waveguides of the second waveguides;
• and
• a waveguide feed network coupled with the array of antenna elements comprising:
• a first waveguide feed stage comprising a first plurality of waveguide combiner/dividers coupled between the four adjacent first waveguides of the first groups and first intermediate waveguides and a second plurality of waveguide combiner/dividers coupled between the four adjacent second waveguides of the second groups and second intermediate waveguides, wherein the first and second intermediate waveguides extend in parallel with the longitudinal axis of the plurality of septum polarizers;
• and
• a second waveguide feed stage coupled with the first intermediate waveguides and the second intermediate waveguides, wherein the second waveguide feed stage extends in a direction perpendicular to the first and second intermediate waveguides.