紧缩场馈源偏焦相位高效计算方法

研究紧缩场馈源偏焦相位的高效计算方法具有重要的实用价值。以适用于高频条件的几何光学法为基础, 根据光线传播的基本规律, 通过三维空间光程差推导, 获得单旋转抛物面及双抛物柱面静区的相位快速计算公式。对比结果表明, 理论公式计算结果与实际模型仿真结果及实测结果一致性好, 在保证计算精度的前提下, 提高了紧缩场馈源偏焦模型相位分析的时效性, 可完全用于指导紧缩场高频端馈源设计及现场安装调试。

Efficient calculation method of phase characteristics of defocusing feed in compact antenna test range

It is of great practical value to study the efficient calculation method of phase characteristics of defocusing feed in compact antenna test range (CATR). Based on the geometrical optics (GO) which is applicable to high frequency conditions, and according to the basic law of light propagation, the fast calculation formulas of quiet zone phase for single rotating paraboloid and dual parabolic cylinder can be obtained through the derivation of optical path difference in three dimensional space. The comparison results between calculation simulation and measurement show that they are consistent with each other, and the timeliness of defocusing feed model analysis of phase in CATR is improved on the premise of ensuring the calculation accuracy, which can be used to guide the design, on-site installation and debugging of high-frequency feed in CATR.