有限元法与UTD结合计算机载天线方向图

为了计算机载天线的方向图,近区矢量场可以作为有限元法(FEM)与UTD(一致性几何绕射理论)的结合点,将二者结合以解决类似的工程问题.首先利用基于有限元法的软件HFSS计算相控阵天线的近区矢量场,然后将此结果作为UTD方法的源进一步计算以预测该相控阵天线的受扰特性.结果表明这种方法可有效用于分析机载相控阵天线的辐射特性.

Analysis of airborne antenna using hybrid method of FEM and UTD

In this paper, the near field vector components are used as a combination point of the FEM and the UTD method for analyzing phased array antenna mounted on airborne platform. The simulation software HFSS based on the FEM is utilized to find the near field vector components of the phased array antennas, and then these vector components are employed as the source of the UTD method to obtain the disturbed radiation pattern. Numerical results show that the hybrid of the two methods not only extends the use of UTD program, but also effectively solves this type of challenging problems.