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本文简要地介绍了曲面及直劈几何绕射理论(GTD)在计算天线方向性中的应用。文中给出了曲面绕射理论计算天线滚动面辐射场以及直劈绕射理论计算天线子午面(E面)辐射场的计算公式,并且将计算值与实验结果进行了比较,一致性较好。这表明,用这两种理论计算天线的方向特性,可以满足工程要求,利用己设计好的计算机程序,可以很快予计方向图。两种理论的结合,可以期望得到有限结构的复杂物体上天线的立体方向图。
This paper briefly introduces the application of GTD in the calculation of antenna directivity. In this paper, the calculation formulas of the radiation field of the antenna rolling surface and the direct diffraction splitting theory for calculating the radiation field of the antenna meridian plane (E-plane) are given. The calculated values are compared with the experimental results, and the agreement is good. This shows that the use of these two theories to calculate the directional characteristics of the antenna can meet the engineering requirements, the use of well-designed computer program, you can quickly calculate the direction of the map. The combination of the two theories can be expected to obtain the stereo structure of the antenna on a complex object with a finite structure.