Antenna housing electrical performance interval analysis method based on interpolation

The invention discloses an interpolation-based antenna housing electrical performance interval analysis method, which comprises the steps of randomly generating a plurality of groups of thickness error and relative dielectric constant error distribution values in a thickness error range and a relative dielectric constant error range of an antenna housing, drawing a housing-added antenna far-field directional diagram, extracting a change interval of an electrical performance index from the diagram, and analyzing the change interval of the electrical performance index. Discretizing incident angles, polarization angles, thicknesses and relative dielectric constants of all positions on the radome, calculating a main polarization component transmission coefficient TM according to discrete points, extracting amplitude and phase change intervals of the TM, obtaining fan-shaped intervals formed by the TM in a complex field by utilizing interpolation, dividing the fan-shaped intervals into polygonal intervals, and add