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本文论述一种有效的计算方法,以确定由角锥喇叭照射反射器天线的远场方向图。均匀几何绕射理论(GTD)公式用于确定喇叭的近场和远场特性。利用物理光学(PO)公式以及雅可比——贝塞耳(Jacobi-Bessel)展开式得出偏馈反射器天线的远场方向图。还给出了反射器天线远场方向图的许多典型结果。特别是详细研究了用来照射反射器的喇叭最佳位置与最佳相位中心的关系,并得出了一些有用的结论。
This article discusses an efficient way to determine the far-field pattern of a reflector antenna illuminated by a pyramid horn. The uniform geometry diffraction theory (GTD) formula is used to determine the near-field and far-field characteristics of the horn. The far-field pattern of the biased reflector antenna was derived using the physical optics (PO) formula and the Jacobian-Jacobi-Bessel expansion. Many typical results of the far-field pattern of the reflector antenna are also given. In particular, the relationship between the best position of the horn and the best phase center for illuminating the reflector has been studied in detail, and some useful conclusions have been drawn.