鱼骨天线相位中心的准确计算方法研究

内容简介：研究了一种考虑地面影响时准确计算鱼骨天线相位中心的方法。由于相位方向图的准确计算是准确提取相位中心的前提，所以我们按照鱼骨天线的施工结构建模，并采用矩量法（MoM）进行计算，保证了相位方向图计算的准确性。地面的影响会导致主瓣上翘，为了减小相位中心计算的误差，选择包含主瓣最大辐射方向的两个正交平面内的相位方向图来进行处理。然后，采用最小二乘法计算了天线的相位中心，并验证了其准确性。最后，给出了一种鱼骨天线的相位中心位置随频率的变化曲线，结果表明该鱼骨天线的相位中心位置随着频率的变化较为明显。

Abstract：An accurate calculation method of the phase center for the fishbone antenna is presented when the ground affection is included. The calculating accuracy of the phase center depends on the accuracy of the phase radiation pattern, we simulate the fishbone antenna in accordance with its practical structure and calculate it with method of moments (MoM). The antenna main lobe will slant upward due to the ground affection. In order to reduce the calculation error, the phase data of those points located in the two orthogonal planes, which include the main lobe maximum radiation direction, is utilized to ex- tract the phase center. And then, the antenna phase center is calculated with the least square method and its accuracy is ver- ified. Finally, curves of the phase center varying with frequency are illustrated, which show that the location of phase center is tightly dependent on the frequency.

作者：邹艳林, 刘平安, 谢宝荣, 辛琦,

关键词：相位中心, 鱼骨天线, 地面, 矩量法(MoM), 最小二乘法,