中场测量相控阵扫描方向图的方法研究

Research of a Measurement Technique for Phased Array Scan Pattern in Intermediate Range

有源相控阵天线的发射和接收天线的性能依赖于阵面口径的幅相分布,有源相控阵的幅相校准工作通常在出厂前通过暗室中的平面近场测量进行,但是某些大型的有源阵面根本无法进暗室进行校准,利用外场测量进行的校准往往无法验证其结果的好坏,该文介绍了一种中场测量相控阵天线扫描方向图的方法,使校准结果能够得到较为客观的评估。

In active phased array antennas, transmit and receive performances are up to the amplitude and phase distributions over the aperture . Active phased arrays are normally calibrated in a near-field antenna range in the factory. But some large phased array can not be calibrated this way. The result of the calibration can not be evaluated by measurement in a open field. In this paper a measuring technique is described for phased array scan pattern in intermediate range to evaluate the result of the calibration.