摘要
本文运用互易原理导出了圆口径分布的天线近区辐射方向图与测量距离的关系。以圆口径指数型分布为例,计算了在不同测量距离下的辐射特性,从而研究了测量距离对天线方向图旁瓣特性的影响,给出了第一旁瓣测量误差与测量距离的关系曲线。最后,用5m环焦天线测量结果验证了理论分析和计算的正确性。
-In this paper, the dependence of circular aperture antenna near-zone radiation patterns on measurement distance is derived using the reciprocity theorem. Taking a circular aperture exponential distribution as an example, the radiation specification of different test distances is calculated, thus the effect of measurement distance on antenna pattern sidelobe specification is investigated. The relationship curve of the first sidelobe measurement error versus measurement distance is given. At last, the correctness of the theoretical analysis and calculation is verified by experiment results of a 5-meter circle focus antenna.
出处
《计量学报》
CSCD
1993年第4期276-280,317,共6页
Acta Metrologica Sinica
关键词
测量
距离
辐射方向图
圆口径
天线
Reciprocity theorem
Aperture field distribution
Measurement distance
Radiation pattern
