有源相控阵天线G/T值测量及误差分析

G/T Measurement and Error Analysis for Active Phased Array Antenna

简述了地面站天线系统G/T值测量的传统方法。论述了室外远场直接法测量有源相控阵天线G/T值的原理方法,推导出测量的原理方程。分析了G/T值测量误差,其均方根误差小于或等于±0.422d B。最后给出了S波段19元阵天线系统G/T测量结果,实测结果与预算结果吻合很好。

In this paper, traditional measurement methods are described simply for earth station system G/T value. Measuring principle and procedure of active phased array antenna G/T value are discussed using outdoor direct far-field method, and measuring principle equation is derived. Error of G/T value measurement is analyzed, and results show that RMS error of G/T value measurement is less than or equal to ±0.422 d B. Measuring result of S-band 19-unit array antenna G/T value is given, test result agrees with prediction result.