Patent ID: 7791549

Claim:
An antenna assembly comprising: an antenna array including: a plurality of antennas configured to receive a signal from a source; and a waveguide feed network coupled to each antenna of the plurality of antennas; and a polarization converter unit configured to compensate for polarization skew between the antenna array and the source; wherein the waveguide feed network comprises a plurality of orthomode transducers, each orthomode transducer coupled to a corresponding one of the plurality of antennas, each orthomode transducer having a first port and a second port, each orthomode transducer configured to receive the signal from the corresponding antenna and to provide at the first port a first component signal having a first polarization and at the second port a second component signal having a second polarization; wherein the first and second polarizations are orthogonal; wherein the feed network is coupled to the plurality of antennas via the plurality of orthomode transducers; and wherein the feed network is constructed and arranged to receive the first component signal and the second component signal from each orthomode transducer and to provide a first summed component signal at a first feed port and a second summed component signal at a second feed port; and wherein the polarization converter unit is coupled to the first and second feed ports and is configured to receive the first summed component signal and the second summed component signal.