利用寄生振子降低振子阵中方向图的不圆度  

The decrease of the un-roundness of an array′s element pattern with parasitic elements

作　　者：李平[1] 卜安涛[1] 史小卫[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电波科学学报》2003年第6期668-672,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目 (6 99710 17)

摘　　要：用矩量法分析了六元圆阵中某一振子的阵中方向图 ,在考虑互耦的情况下考察其不圆度。提出了通过增加寄生振子来降低振子阵中方向图不圆度的方法。增加的寄生振子按照对称分布 ,与原来的阵列单元一起构成新的阵列 ,使在新阵列中 ,其他振子对考察单元的耦合影响相互抵消一部分 ,从而降低其方向图的不圆度 ;应用SNEC软件计算得到的不圆度从一般六元阵列的大于 10dB ,降到 13个寄生振子阵列的小于 2dB 。This paper analyzes the pattern of an array′s element in a circle six-element antenna array by Method of Moment. The un-roundness of the pattern with the mutual coupling considered is analyzed. A novel method, which adds some parasitic elements to the array, is presented to decrease the un-roundness. The parasitic elements are arrayed symmetrically, so the effect on the main element of the mutual coupling by the other elements in the new array can be counteracted partly and hence its un-roundness can be reduced. This method reduces the un-roundness of a common circle six-element antenna array from more than 10dB to less than 2dB of an array with 13 parasitic elements by computation with SNEC, which proves the validity.

关 键 词：矩量法 寄生振子 振子阵 方向图 不圆度 

分 类 号：TN820[电子电信—信息与通信工程]