Scanning-Phase Correction for an Offset-Feed Near-Field Gregorian Reflector

摘要

A method is presented to correct the scanning-phase error of an offset-feed near-field Gregorian reflector antenna. A numerical search is performed to find the array scan angle for each element to produce a specified reflector scan angle. This results in a nonlinear array-aperture phase distribution that produces a linear phase front across the main reflector's aperture. For the geometrical parameters considered, the phase correction can be accomplished without any loss in main-beam power or scan range. Phased-array antennas, Reflector antennas.