随机风载下双偏置格里高利天线指向误差建模与应用OA

Investigation of pointing errors of dual-offset Gregorian antenna primarily relied on simula-tion software,which was computationally inefficient and not conducive to antenna performance optimiza-tion and wind disturbance rejection design.Based on the pointing error model of a Cassegrain antenna,a pointing error model was developed for dual-offset Gregorian antenna with similar formal structure.The model was validated through electromagnetic simulations,and the results demonstrate that the developed pointing error model is both highly accurate and applicable,providing a basis for establishing a unified theo-retical framework for both types of antennas.Taking the dual-offset Gregorian antenna element of the square kilometre array(SKA)as an example,the pointing error variation were analyzed by combining an-tenna structural deformation data and the pointing error model under different random wind loads and differ-ent attitudes.The results indicate that the established error model may rapidly assess the pointing errors of dual-offset Gregorian antennas under random wind loading.