摘要
本文提出一种由横向馈源阵列放置在反射面顶端构成的混合天线系统,采用了并矢格林函数法对系统中阵列馈源面和反射面孔径面处的场进行计算,然后导出散射矩阵,并通过对散射矩阵的计算、分析来研究混合天线系统中的波束形成问题。通过合理的分析与设计,可以使该天线的波束扫描范围达到数百个波束宽度,而所采用的阵列的单元数量较常规阵列天线少得多。从本文给出的实例可以看出,这种天线在±20°扫描角范围内,波束形状基本保持不变,实现了较大角域内的波束扫描。
In this paper, a hybrid anterma system which was composed by putting a feed array near the apex of a compound reflector has been discussed. The dyadic Green＇s function was used to compute the electric or magnetic field at the feed array and the reflector aperture which can be used to compute the scatter matrix of the system. The scatter matrix was then used to further analyze the beam forming of the system. Through proper design of the hybrid antenna system,the beam scarming can reach hundreds of beam width and the elements of feed array used are much less than the regular feed array. From the example given in this paper, we can find out that when the scanning angle is within ±20°, the beam keeps the same and the system realizes wide-angle scan.
出处
《电子测量技术》
2007年第3期17-19,共3页
Electronic Measurement Technology
关键词
混合天线
散射矩阵
波束形成
hybrid antenna
scatter matrix
beam forming
