Highly-integrated antenna feed assembly

An antenna feed assembly, comprising:

• a first layer having a top surface and a bottom surface, the bottom surface of the first layer comprising recesses that define portions of a first polarization-forming network, the first polarization-forming network comprising:
• a first pair of individual waveguides;
• a first hybrid comprising a first pair of ports coupled to the first pair of individual waveguides and further comprising a second pair of ports;
• a first filter of a first diplexer coupled to one of the second pair of ports;
• and
• a first filter of a second diplexer coupled to another of the second pair of ports;
• a second layer having a top surface and a bottom surface, the top surface of the second layer extending across the recesses of the bottom surface of the first layer to form remaining surfaces of the first polarization-forming network, the bottom surface of the second layer comprising recesses that define portions of a second polarization-forming network, the second polarization-forming network comprising:
• a second pair of individual waveguides;
• a second hybrid underlying the first hybrid and comprising a third pair of ports coupled to the second pair of individual waveguides and further comprising a fourth pair of ports;
• a second filter of the first diplexer coupled to one of the fourth pair of ports and underlying the first filter of the first diplexer;
• and
• a second filter of the second diplexer coupled to another of the fourth pair of ports and underlying the first filter of the second diplexer.