12-HORN MONOPULSE ANTENNA SYSTEM FOR MILLSTONE HILL RADAR

摘要

The 440-Mcps conical-scan tracker at the Millstone Hill radar site has been converted to an L-band 12-horn monopulse tracker utilizing a Cassegrain optics reflector system. The amplitude sensing monopulse feed illuminates a 10-rfoot subreflector and thence an 84-foot diameter parab¬oloid with linear or either, sense of circular polarization. This system conversion increased the capabilities of the radar, complex in that higher antenna gain and increased tracking sensitivity are obtained. The merits of the 12-horn system have been proved with actual results substantiating the theoretical predictions. This report discusses the design considerations and final perform¬ance characteristics of the overall antenna system and its individual components.