一种赋形反射面天线远场的快速计算方法  

A Fast Computing Method for Shaped Reflector Antenna Far-field

作　　者：谢苏隆[1] 钟鹰[1] 

机构地区：[1]中国空间技术研究院西安分院空间微波技术国防科技重点实验室,西安710000

出　　处：《现代雷达》2010年第6期63-66,共4页Modern Radar

摘　　要：将积分网格内的相位用二次式表示，二次式的参数通过泰勒级数展开得到。与原来的积分式相比，减少了积分所需的网格数目，使得计算赋形反射面天线远场的速度得到极大的提高。该方法还可以与其他方法相结合，进一步加快远场的计算速度。模拟计算结果与直接积分法相比较，在计算精度相同的情况下，计算时间变为原来时间的1／3～1／4。The phase in each integral grid is expressed by quadratic approximation, whose parameters can be gained by taylor series. Compared with primary integral, the number of integral grids required decrease a lot and the rate of computing radiation field is improved very much. Moreover, this technique can combine with other methods for computing radiation field with ease. Computer results show, at the same accuracy, the computing time is about 1/3 - 1/4 of primary one.

关 键 词：反射面展开法 Zernike函数 赋形反射面天线 物理光学法 

分 类 号：TN823.27[电子电信—信息与通信工程]