REflector Antennas: The sidelobe sensitivity analysis

摘要

Sensitivity analysis is an essential part in the error evaluation for distorted reflector antennas. The sensitivity defined as the gradient of sidelobe level with respect to surface nodal displacement is investigated. By dividing the reflector into a series of triangles, the partial derivatives of sidelobe level directivity with respect to surface nodal displacement are obtained. Simulation results show the sensitivity contour plots for an axis-symmetrical reflector and an offset reflector in the nominal state, and some conclusions are arrived.