Radiation pattern synthesis for circular aperture horn antennas
Radiation pattern synthesis for circular aperture horn antennas
复制标题
圆孔径喇叭天线的辐射方向图合成
DOI：
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发表时间：
1966
期刊：
影响因子：
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通讯作者：
A. Ludwig
中科院分区：
文献类型：
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作者：
A. Ludwig
本文通过假设圆口径喇叭天线的口径分布由圆柱波导模场组成，得到了一组适用于圆口径喇叭天线辐射方向图综合的辐射方向图函数。提出了一种用于使用辐射方向图函数的线性组合来近似期望的辐射方向图的技术。线性组合的辐射方向图函数导致最大的二次增益，当用于照射抛物面天线，获得经验。使用球面波理论，理论上可从天线获得的最大性能是作为馈电系统的孔径尺寸的函数导出的;从这些理论上的性能限制所产生的馈电效率相比，从圆形孔径喇叭天线获得的图案的馈电效率，并尝试实现最佳圆形孔径喇叭图案的实验结果。
A set of radiation pattern functions, suitable for synthesis of radiation patterns from circular aperture horn antennas, is obtained by assuming an aperture distribution consisting of the fields of cylindrical waveguide modes. A technique is presented for using a linear combination of the radiation pattern functions to approximate a desired radiation pattern. Linear combinations of the radiation pattern functions resulting in maximum secondary gain, when used to illuminate a paraboloidal antenna, are obtained empirically. Using spherical wave theory, maximum performance theoretically obtainable from an antenna is derived as a function of the aperture size of the feed system; the feed efficiency resulting from these theoretical limits on performance is compared to the feed efficiency of patterns obtainable from circular aperture horn antennas, and to experimental results of attempts to realize optimum circular aperture horn patterns.