基于边缘电流逼近法近远场变换中的探头补偿

Probe Correction Based on the Approaching Method in Near to Far Field Transformation

对探头H面方向图,国内使用的E面电场积分法,在天线的远区副瓣引入较大误差。针对这种情况,提出一种新的基于边缘电流逼近法的探头方向图应用。通过在微波暗室对某频段天线进行实验测试,分别用国内传统的E面电场法与新方法进行计算比较。结果表明,此方法大大的改善了副瓣精度,基本达到了国际先进水平,为国内高精度测试打下了坚实的基础。

The H-plane pattern of probe which is the E-field integration method used at home introduces too much error to the back hemisphere sidelobes in plane near to far field transformation, so an improved method of probe pattern which base on approaching fringe current method is introduced and be used in near to far field transformation. An array antenna was measured in anechoic chamber, and the E-field integration method and this method were used in near to far transformation. The result indicates that the technique proves to improve the precision of sidelobes, achieve the level of international, and lay the foundation for high precision measurement at home.