摘要
针对运用矩量法计算电大尺寸天线时遇到的严重困难,提出一种基于矩量法的计算天线远场的远区近似(MOM-FZ)方法.该方法将阵列天线分解为多个子阵并运用矩量法处理子阵中天线单元间互耦的影响,由此得到天线单元的电流分布,然后运用远区近似得到整个阵列的远区方向图.研究表明,通过适当选取子阵的大小,可以使相距较远单元间的互耦忽略不计,达到减少计算量的目的.用本法获得的某雷达天线方向图的结果与基于太阳噪声的实测结果基本一致.
Aimed at the difficulty in calculating an electrically large size antenna by using MOM, a far zone approximate method based on MOM（MOM-FZ） was presented for calculating radar antenna pattern. The method divided antenna array into a number of sub-arrays and dealt with the influence of mutual coupling between antenna elements in sub-array by using the MOM, for which, the current distribution of each antenna element was obtained. And then,the far zone pattern of the whole array was derived from using far zone approximation. The study shows that the mutual coupling between further antenna elements may be omitted by selecting properly the size of sub- arrays, which can reduce the computation considerably. An actual radar antenna pattern plotted by using the method shows approximately no difference from the practically measured results based on solar noise.
出处
《空军雷达学院学报》
2006年第3期167-170,共4页
Journal of Air Force Radar Academy
