基于混合算法近远场变换中的探头补偿

Probe Correction Based on Hybrid Algorithm in Near to Far Field Transformation

针对目前平面近远场变换中,探头H面方向图对天线远区副瓣引入误差较大的情况,研究了一种基于E面电场-边缘电流逼近混合算法的探头补偿。通过在微波暗室对某频段阵列天线测量,并分别用E面电场法、边缘电流逼近法以及混合算法进行近远场变换。结果表明,此方法集合了前两种方法的优点,从而使副瓣精度有明显的提高,证明了该方法的有效性和工程实用性。

The H-plane pattern of probe introduces too much error to the back hemisphere sidelobes in plane near to far field transformation at present, so an improved method of probe pattern which base on hybrid algorithm of E-field and the approximate 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 method、the approximate fringe current method and the hybrid algorithm were used in near to far transformation. The result indicates that the hybrid algorithm has the merits of the frontal methods, and proves to improve the precision of sidelobes, and to be accurate and practical.