阵列天线在UXB系统标校中的应用

测量船基地现有标校塔与测量船距离只有980 m，无法满足高频段统一X频段（UXB）系统天线的远场标校距离条件。针对这一难题，提出了一种利用阵列天线合成准平面波的方法，实现在近场距离条件下的远场标校。在现有标校塔上架设安装阵列天线设备，利用16个单喇叭天线组成4×4的天线阵，并通过控制单个喇叭天线元的幅度和相位，使得传播到测量船UXB天线口面处由阵列天线合成的电磁波是准平面波，满足X频段天线远场标校要求。综合运用最优化理论和遗传算法，对阵列天线元的幅度和相位权值进行调节和优化，使得合成的电磁波更为接近准平面波。计算机仿真实验和外场条件下的实际测试均验证了该方法生成的准平面波能够满足UXB天线远场标校要求。

Application of array antenna in united X band system calibration

The distance between the existing calibration tower of TT&C ship base and TT&C ship is only 980 meters,which cannot satisfy the United X Band(UXB) system antenna far-field calibration condition. To solve the problem,a method using array antenna to synthesize quasi-plane wave is presented to implement the far-field calibration under the condition of the near distance. Sixteen horns are used to build the 4×4 array antenna equipment on calibration tower. By controlling the amplitude and phase of the array antenna element,the synthesized wave spreading to the antenna surface created by array antenna is the quasi-plane wave satisfying the X band antenna far-field calibration condition.Optimization theory and Genetic Algorithm are used to optimize the weight values of array antenna element amplitude and phase,thus the synthesized wave can be more closer to the quasi-plane wave.Both computer simulation and outfield experiments verify that the quasi-plane wave produced by this method can meet the far-field calibration requirement.