摘 要：文章提出了一种基于平面近场的有源相控阵天线系统G/T 值测量方法，通过分别测量接收系统的有源增益和有源噪声功率，进而测量出G/T 值。该方法在暗室平面近场进行，实现简单，受环境影响小，重复度高，解决了大型阵列天线G/T值测量困难的问题。给出了测量原理和测试误差分析，并通过对Ka 频段接收相控阵的G/T 值实测，与理论计算结果一致，且多次测量的抖动在0.25 dB 内。
关键词：G/T 值测量；有源相控阵天线；平面近场
中图分类号：TN82 文献标识码：A 文章编号：2096-4706（2021）01-0068-03
G/T Value Measurement Method of Active Phased Array System Based on Planar Near Field
WU Ruirong，ZOU Yongqing，LONG Yonggang，LI Jingfeng，WU Yiwei
（The 38th Research Institute of China Electronics Technology Group Corporation，Hefei 230088，China）
Abstract：In this paper，a method of measuring G/T value of active phased array antenna system based on planar near field is proposed. By measuring the active gain and active noise power of the receiving system respectively，the G/T value can be measured. The method is implemented in the near field of the dark chamber plane，which is simple to realize，small affected by the environment and high repetition. It solves the difficult problem of measuring the G/T value of large array antenna. The measurement principle and error analysis are given in this paper. The measurement principle and error analysis are given. The measured G/T value of Ka band receiving phased array is consistent with the theoretical calculation，and the jitter of multiple measurements is within 0.25 dB.
Keywords：G/T value measurement；active phased array antenna；planar near field
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作者简介：吴瑞荣（1978.01—），女，汉族，安徽合肥人，副高级工程师，硕士，研究方向：电磁场与微波技术、通信系统前端等。