Quiet zone evaluation from nonredundant rectilinear data for tri-reflector compact antenna test range

The quiet zone performance of a tri-reflector Compact Antenna Test Range is evaluated by an efficient sampling strategy with rectilinear plane scanning. The method relies on the nonredundant sampling expression of the scattered fields and the optimal sampling interpolation. An evenly stepping sampling based on the nonredundant sampling is also adopted considering the difficulty of practical scanning. In the modeling of the source, a convenient aperture model is used. Numerical results are presented, showing that the performance of quiet zone can be evaluated by a remarkably reduced number of sampling points, which indicates that the measurement time can be efficiently decreased.