Radiation Pattern Analysis of Reflector Antennas - Discussions and Hybrid Use of Physical Optics and Aperture Field Integration Method -
Radiation Pattern Analysis of Reflector Antennas - Discussions and Hybrid Use of Physical Optics and Aperture Field Integration Method -
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反射面天线的辐射方向图分析 - 物理光学和孔径场积分方法的讨论和混合使用 -
DOI：
10.1093/ietcom/e88-b.5.1790
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Ando
中科院分区：
文献类型：
--
作者：
M. Ando
本文从衍射理论的角度综述了物理光学的近似原理。确定了PO的两个关键误差因素，即1)边缘衍射系数误差和2)虚拟穿透射线误差。分别提出了PO- af和PTD- af两种抑制PO和PTD虚假穿透射线的改进方法。在反射面天线的深阴影区，PO-AF和PDT-AF分别逼近PO-EEC和UTD，同时保证连续性。对二维散射体的有效性进行了数值验证。
This paper reviews the approximation principle of Physical Optics in view of diffraction theory. Two key error factors are identified for PO, that is, 1) errors in edge diffraction coefficients and 2) fictitious penetrating rays. Improved methods named PO-AF and PTD-AF are proposed as the methods which suppress the fictitious penetrating rays from PO and PTD respectively. In deep shadow regions of the reflector antennas, PO-AF and PDT-AF approach to PO-EEC and UTD respectively, while the continuity is assured. The effectiveness is numerically demonstrated for two dimensional scatterers.