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本文主要研究大型飞行体上天线方向图的测量,解决了如下三个问题:(1)模型测量中电导率不能随缩比而变化,本文给出了由此引起之测量误差的数量范围。(2)提出了“局部编尺”法这种实际测量方法,通过选择合适尺寸的局部飞行体,以保证测试误差在允许的范围之内。(3)提出了“测量计算”法,即把天线装在很小的矩形板上测出实验数据,通过分析找出理想方向图,再用几何绕射理论就可算出实际飞行体上的实际方向图,这种方法可作为天线测量的一个重要方向。如灵活使用这两种方法来测大型飞行体上任意位置处平装或接近平装的线极化天线的两个主平面天线方向图,其误差小于0.5分贝,其经济效益是非常高的。
This paper mainly studies the measurement of the antenna pattern on a large flying body and solves the following three problems: (1) The conductivity does not change with the shrinkage ratio in the model measurement. This article gives the range of the measurement error caused by it. (2) Put forward the method of “local scale” method, which can ensure the test error within the allowable range by selecting the local flight body of the appropriate size. (3) Proposed a “measurement calculation” method, that is, the antenna mounted on a small rectangular plate measured experimental data, through the analysis to find the ideal pattern, then the theory of geometrical diffraction can be calculated on the actual flight body Directional pattern, this method can be used as an antenna measurement of an important direction. Such as the flexibility to use these two methods to measure large aircraft body at any location at or near the paperback flat patch antenna polarization of the two main planar antenna pattern, the error is less than 0.5 dB, the economic benefits are very high.