一种快速综合基站天线赋形方向图的迭代方法  

Fast iterative method for the synthesis of the base-station antenna's shaped beam

作　　者：邓敬亚[1] 张小苗[2] 尹应增[2] 刘其中[2] 

机构地区：[1]西安电子科技大学理学院,陕西西安710071 [2]西安电子科技大学天线与微波技术重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2011年第5期142-146,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60471043)

摘　　要：针对基站天线赋形波束的上副瓣抑制和下零点填充的要求,研究了一种快速综合具有给定上副瓣和下零点电平的方向图的迭代方法.对给定的零点和副瓣的电平值,应用布伦特方法迭代出功率方向图极值点的位置;根据零点位置写出功率方向图的因式分解形式,各项系数即是各阵元带相位的激励系数.与普遍采用的优化算法相比,此方法效率高,耗时少.结合一种天线单元,综合了一款10元阵列方向图,并用HFSS仿真结果验证,上旁瓣抑制和下零点填充性能良好.For the requirements of upper sidelobes suppression and lower null-fills of the base-station antennas＇ shaped beam, a fast iterative method for the synthesis of a pattern with specified levels of upper sidelobes and lower nulls is studied. Brent＇s method is used to iterate the extrema＇s positions with the specified levels of sidelobes and nulls of the power pattern＇s expression, the factorized expression of the pattern can be obtained according to final positions of zeros, and the coefficient of each term is the excitation coefficient with phase information. This method is much more efficient and consumes much less time than optimization methods which are normally used presently. A 10 unit array＇s pattern is synthesized using an element, and the pattern is confirmed by the result of HFSS simulation. The performances of upper sidelobes suppression and lower nullfills are good, showing that the iterative method presented in this paper is a fast and useful pattern synthesis method for base station antennas.

关 键 词：基站天线 赋形波束天线 旁瓣抑制 零点填充 布伦特方法 

分 类 号：TN820[电子电信—信息与通信工程]