Linearly polarized grid reflector antenna system with improved cross-polarization performance

摘要

A spectrum reuse antenna system comprises: (a) a linearly polarized reflector (13), which includes first grid conductors (13a) arrayed to reflect signals of one linear polarization mounted over (b) a second linearly polarized reflector (15), which includes second grid conductors (15a) arranged to reflect signals of an orthogonal polarization. A first array of feed horns (21) of the first polarization and a second array of feed horns (23) of said second polarization are disposed at focal points (F1, F2) of respective reflectors. Improved rejection of cross-polarized signals at the respective arrays is achieved by providing (6) conductors (21a) comprising a third grid of said second polarization disposed over the aperture of said first array of horns and (b) conductors (23a) of a fourth grid of said first polarization disposed over the aperture of said second array of horns. IMAGE