平面波谱恢复算法在平面近场测量中的应用

介绍用于天线平面近场测量的一种近远场变换新算法。该法利用被测天线的平面波谱和口径场幅相分布之间的关系,以及天线口面的约束条件,用G-P迭代算法从平面波谱的置信谱域部分恢复出置信谱域外的平面波谱。这种方法减小了较小截断角下有限扫描面对测量精度的影响,并提高了天线近场测量的效率。

Application of PWS Restoration Algorithm in Planar Near-Field Measurements

A new algorithm for near-field to far-field transforming used in antenna planar near-field measurement is presented. The algorithm is to partially restore the plane wave spectrum except for confidence spectrum domain from the confidence spectrum domain of the plane wave spectrum by using the relation of the plane wave spectrum of the antenna under test with the caliber field amplitude and phase distribution as well as the constraint condition for the antenna aperture and by the Gerchberg-Papoulis iterative algorithm. The algorithm reduces the effect of the finite scanning surface on the measurement accuracy in the narrower truncation angle and increases the efficiency of the antenna near-field measurement.