Novel modular approach based on Gaussian beam diffraction for analysing quasi-optical multi-reflector antennas
Novel modular approach based on Gaussian beam diffraction for analysing quasi-optical multi-reflector antennas
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DOI：
10.1049/ip-map:20020390
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发表时间：
2002-12
期刊：
影响因子：
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通讯作者：
C. Rieckmann;M. Rayner;C. Parini;D. H. Martin;R. Donnan
中科院分区：
文献类型：
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作者：
C. Rieckmann;M. Rayner;C. Parini;D. H. Martin;R. Donnan
提出了一种分析准光学多反射镜系统的新方法。在所提出的分析方法中，输入光束（来自馈源或来自前一反射器的输出）被扩展成一组基本高斯光束。这些信号传播到反射器。用几何光学方法处理反射。衍射处理应用正则问题的三维高斯光束入射到一个不透明的基尔霍夫半屏。它的渐近解产生一个所谓的边界衍射波，补充了几何波，对应于反射光束。输出光束是所有反射和衍射基本光束的叠加，并且可以再次扩展为一组高斯光束，使得该方法模块化并且适用于大型多元准光学系统。
A novel approach for analysing quasi-optical multi-reflector systems is presented. In the proposed method of analysis the input beam (from the feed or output from a previous reflector) is expanded into a set of elementary Gaussian beams. These are propagated to the reflector. Reflection is treated in a geometrical optics manner. Diffraction is treated by applying the canonical problem of a 3-D Gaussian beam incident upon an opaque Kirchhoff half-screen. Its asymptotic solution yields a so-called boundary-diffraction wave that complements the geometrical wave that corresponds to the reflected beam. The output beam is a superposition of all reflected and diffracted elementary beams and can again be expanded into a set of Gaussian beams, making the method modular and suitable for large multi-element quasi-optical systems.