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首页> 外文期刊>International Journal on Communications Antenna and Propagation >Axial-Mode Performance Characteristics of a Thin-Wire Square Helical Antenna
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Axial-Mode Performance Characteristics of a Thin-Wire Square Helical Antenna

机译：细线方形螺旋天线的轴向模式性能特征

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摘要

This paper, using an adaptation of a method described by Kornhauser for a circular helix antenna in a 1951 publication, rigorously develops hitherto unavailable explicit analytical expressions for the far-zone electric fields radiated in free space, by a thin-wire helical antenna, of square cross-section. It is shown in the presentation that these radiation field expressions for the square helical antenna represent a general case, from which corresponding expressions, exactly as published elsewhere for the square-loop and linear geometries, are recoverable: to support the correctness of the formulation. And subsequently using the expressions as basis, the presentation undertakes a systematic investigation of the characteristic performance features of the square helical antenna, mounted on a ground plane of infinite extent; when operated in the axial mode, and for various values of square-loop perimeter and number of helix turns. For computational data, the antenna's current distribution is determined via the method of moments with piece-wise linear basis and testing functions, after invoking the image theory. In addition to the radiated electric field, numerical results concerning axial ratio as well as the directive gain, for the square helix antenna, and for a range of antenna physical dimensions, are presented in graphical formats. These results very clearly indicate that the axial-mode performance of the square helical antenna is comparable with that of the conventional circular helical antenna.
机译：本文采用了Kornhauser在1951年发表的文章中描述的圆形螺旋天线的方法的改进方法，针对细空间螺旋天线在自由空间中辐射的远区电场，严格地开发了迄今无法获得的显式解析表达式。方形截面。在演示文稿中显示，这些用于方形螺旋天线的辐射场表达式代表一个一般情况，从中可以恢复与在其他地方公开的相应的表达式（对于平方环和线性几何形状）完全相同：以支持公式的正确性。并随后以这些表达式为基础，对系统安装在无限范围接地平面上的方形螺旋天线的特性性能进行了系统的研究。在轴向模式下运行时，以及各种平方环周长和螺旋匝数的值。对于计算数据，在调用镜像理论后，通过具有分段线性基础和测试功能的矩量法确定天线的电流分布。除了辐射电场，还以图形格式显示了有关方形螺旋天线以及一系列天线物理尺寸的轴向比率和定向增益的数值结果。这些结果非常清楚地表明，方形螺旋天线的轴向模式性能可与常规圆形螺旋天线相媲美。

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