由平面波谱法求解天线罩瞄准误差的一种方法

天线罩是用来保护无线电系统免受外界影响的一种装置,为了保证在天线扫描角范围内电磁波通过天线罩时得到最大的功率传输系数和最小的相位畸变,运用平面波谱法分析天线罩对天线电磁性能的影响,采用数值积分法求得远区方向图,结合优化方法求解出瞄准误差.

A Numerical Algorithm for Solving Radome Aiming Error by Plane Wave Spectrum

The radome is a device for protecting the antenna from the affect of the environment. In order to obtain the maximum of power transmit rate and the minimum of phase distortion of the electromagnetic wave through the radome, the influence of radome on the electrornagnetic performance of antenna is analyzed by means of the plane wave spectrum method. Meanwhile. the directional pattern of the far field of antenna - radome system is calculated using numerical surface integration algorithm, and the aiming error is further obtained by numerical opti- mization techniques. This paper also investigates the influence of the number of integration interval of the numerical quadrature on the computational effort, and a proper number of integration intervals is obtained. Finally, some nu- merical examples are given. and the feasibility and efficiency of the proposed algorithm are verified.