Evaluation of edge-diffracted fields including equivalent currents for the caustic regions
Evaluation of edge-diffracted fields including equivalent currents for the caustic regions
复制标题
边缘衍射场的评估，包括焦散区域的等效电流
DOI：
10.1109/tap.1969.1139445
复制
发表时间：
1969
影响因子：
5.7
通讯作者：
L. Peters
中科院分区：
文献类型：
--
作者：
C. Ryan;L. Peters
利用几何绕射理论的概念，得到了有限个轴对称圆锥台组成的物体的绕射场。平面波入射在这样的目标上的后向散射场得到特别强调的那些区域通常是避免的，即焦散区及其附近。该方法利用等效电流源和磁电流源，并将其纳入几何绕射理论。这种解决方案是这样的，它很容易被纳入一个通用的计算机程序，而不是需要一个新的程序被写入每个形状。给出了圆锥、圆柱和圆锥帽柱等几个结果。此外，该方法很容易应用于天线问题。一个例子，这是报告由一个短截线的辐射在一个圆形的接地平面。本理论与洛佩斯报道的实验结果相当吻合，而洛佩斯给出的原始理论误差高达10 dB。
The fields diffracted by a body made up of finite axially symmetric cone frustums are obtained using the concepts of the geometrical theory of diffraction. The backscattered field for plane-wave incidence on such a target is obtained with particular emphasis on those regions that are usually avoided, namely, the caustic region and its immediate vicinity. The method makes use of equivalent electric and magnetic current sources which are incorporated in the geometrical theory of diffraction. This solution is such that it is readily incorporated in a general computer program, rather than requiring that a new program be written for each shape. Several results, such as the cone, the cylinder and the conically capped cylinder, are given. In addition, the method is readily applied to antenna problems. An example which is reported consists of the radiation by a stub over a circular ground plane. This present theory yields quite good agreement with experimental results reported by Lopez, whereas the original theory given by Lopez is in error by as much as 10 dB.