A numerical analysis of antenna factor of bilog antennas for normalized site attenuation and EMC measurement
A numerical analysis of antenna factor of bilog antennas for normalized site attenuation and EMC measurement
复制标题
双对数天线归一化站点衰减和电磁兼容测量天线系数的数值分析
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Ken
中科院分区：
文献类型：
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作者：
Hsing;Ken
天线因子（AF）值通常基于天线处于自由空间中的假设来确定。在实践中，NSA和EMC测量通常在存在完美导电接地层的情况下进行。测量用双对数天线的AF会受到接地层的严重影响。此外，对数周期元件的有源相位中心的变化也会引起AF的变化。在本文中，基于矩量法的软件代码被用来研究在不同高度的水平和垂直极化的双对数天线在地平面上的AF。同时，对天线与镜像之间的互耦以及有源相位中心的变化进行了数值分析。
The antenna factor (AF) values are typically determined based on the assumption that the antenna is in free space. In practice, the NSA and EMC measurement are often conducted in the presence of a perfectly conducting ground plane. The AF of bilog antenna used for measurement might be seriously affected by a ground plane. In addition, the variation of the active phase center of log periodic element can also induce variations in AF. In this paper, software codes based on method of moments are used to study the AF of a bilog antenna over a ground plane at different heights for both horizontal and vertical polarizations. Meanwhile, the numerical analyses of the mutual coupling between antenna and its image, and the variation of the active phase center are also carried out.