Abstract: A multi-channel feed network includes a common waveguide section (either square or circular) for connection to a satellite antenna for propagating two orthogonal polarizations. The feed network further includes a low pass section connected with the common waveguide, and a high pass section. The low pass section includes a band reject filter (BRF) formed from slots cut to reject higher frequency signals. The high pass section can be a rectangular waveguide functioning to filter low frequency signals. Orthogonal linear polarizations are provided for the high frequency bands by adding additional high pass sections connected by power dividers, and for the low frequency bands by adding a conventional OMT. By using two 90° degree hybrid couplers and two power dividers, a high pass network can be created to support dual circular or linear polarizations. The high pass network can be die cast as an integrated unit to simplify manufacturing.

Abstract: A dual band antenna feed is made with an embedded waveguide structure to enable combining of Ka and Ku band signals without the need for an additional cavity-type filter. The antenna feed includes a Ka and Ku band interface section (22) with two Ka band vertical polarization waveguide sections (31) and (32), and a single Ku band waveguide section (34) which carries both vertical and horizontal polarization Ku band signals. The opposing walls (36-37) of the Ku band waveguide (34) carrying the vertical polarization Ku band signals are transitioned to step down from an input section (40) to successively smaller dimensioned sections (41-44), and then to step back up in successively larger dimensioned sections (45-47) to an output section (48). The two Ka band sections (31-32) are fed into openings in Ku band section.(46), on opposite sides of the opening for the Ku band transition section (45). The output section (48) then provides a combined Ka band vertical and Ku band horizontal and vertical signals.

Abstract: A multi-channel feed network includes a main waveguide section (either square or circular) for connection to a satellite antenna for propagating two orthogonal polarizations. The feed network further includes a low pass section connected on axis with the main waveguide, the low pass section having the same cross section as the main waveguide, and a high pass section also connected perpendicular to the main waveguide. The low pass section includes a band reject filter (BRF) formed from slots cut to reject higher frequency signals. The high pass section can be a rectangular waveguide which functions to filter low frequency signals. The feed network can be configured to support a number of different polarizations. Orthogonal linear polarizations are provided for the high frequency bands by adding additional high pass sections connected by power dividers, and for the low frequency bands by adding a conventional OMT.

Abstract: A multi-channel feed network includes a main waveguide section (either square or circular) for connection to a satellite antenna for propagating two orthogonal polarizations. The feed network further includes a low pass section connected on axis with the main waveguide, the low pass section having the same cross section as the main waveguide, and a high pass section also connected perpendicular to the main waveguide. The low pass section includes a band reject filter (BRF) formed from slots cut to reject higher frequency signals. The high pass section can be a rectangular waveguide which functions to filter low frequency signals. The feed network can be configured to support a number of different polarizations. Orthogonal linear polarizations are provided for the high frequency bands by adding additional high pass sections connected by power dividers, and for the low frequency bands by adding a conventional OMT.