Patent ID: 9318807
Filing Date: 2016-04-19
CPC Classification: H01Q

Claim Text:
1. A feed for a low profile antenna comprising: a stacked array of septum polarizers, including a first septum polarizer and a second septum polarizer, the first septum polarizer having a first stepped septum in a first feed horn port, and the second septum polarizer having a second stepped septum in a second feed horn port, the second feed horn port being adjacent and parallel to the first feed horn port and having a shared wall with the first feed horn port, and the first stepped septum being orthogonal to the second stepped septum, and the second stepped septum extending from the shared wall; a manifold operably coupled to the first feed horn port and the second feed horn port, the manifold having a left transmit port permitting left circular polarization transmission, a right transmit port permitting right circular polarization transmission, a left receive port permitting left circular polarization reception and a right receive port permitting right circular polarization reception, the left receive port and left transmit port being coupled to the first feed horn port by a first left communication path including a first left waveguide, and the right receive port and right transmit port being coupled to the first feed horn port by a first right communication path including a first right waveguide; a left tee-junction and a right tee-junction, the left transmit port being coupled to the first left waveguide by the left tee-junction, and the right transmit port being coupled to the first right waveguide by the right tee-junction; a second left waveguide and a second right waveguide, the second left waveguide joined to the first left waveguide by a left splitter, and the second right waveguide joined to the first right waveguide by a right splitter; the left splitter comprising a left broadwall coupler coupling the first left waveguide and the second left waveguide; the right splitter comprising a right broadwall coupler coupling the first right waveguide and the second right waveguide; the second left waveguide having a left port end extending to the second feedhorn port and a loaded terminated end opposite the left port end; and the second right waveguide having a right port end extending to the first feedhorn port and a loaded terminated end opposite the right port end.