Constrained Overlapping Feed Arrays for Contiguous Contour Beam Reflector Antennas,
JET PROPULSION LAB PASADENA CA
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Contour beam antennas with contiguous beams generally utilize frequency andor polarization discrimination between the adjacent beams for isolation purposes. When polarization discrimination is not possible and the frequency separation between channels is small, isolation between the adjacent beam feed ports can be achieved with a -3 dB loss in the overlapping feeds. An alternative to this approach, with less loss approx. 0.5 dB, may be achieved by constraining overlapping feed radiating elements which serve both contiguous beams.