Analysis of Fabrication Errors of Two-Layers Dichroic for Quasi-Optical Network
首发时间:2009-02-09
Abstract:With the current and future requirements of space-borne microwave and millimetric wave instruments, particularly for earth observation, there has been considerable research effort put into large reflector antenna system worldwide. Dichroic are key components in the design of large reflector antenna systems. But the measurement performance of dichroic is usually different from simulation result, this problems will degrade the performance of the whole antenna systems very seriously. This paper presents the analysis of fabrication errors of two-layers dichroic for quasi-optical network, The Inter-layer Separation Distance (ISD) and the Unit cell Aligning Error (UAE) was modelled and analysised. The results show that The ISD and UAE will degrade the performance of the dichroic obviously, and the dichroic of rectangular elements is very sensitive to the UAE on X direction rather than that of the Y direction.
keywords: Dichroic Quasi-Optical Network Fabrication Error
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准光网络系统中双层双色器制造误差的分析
摘要:由于目前和今后对空间微波和毫米波器件的需求逐渐增强,特别是地球观测方面,现在已经有相当的研究工作投入到大型反射面天线系统中。双色器是大型反射面天线系统中重要的器件,但是双色器的测试结果与仿真结果总是有点差别,这样的差别会严重影响整个天线系统的性能。本文主要讨论了准光网络系统中双色器制造误差的分析,文中对层间距误差及单元对准误差进行了建模及分析。结果显示,层间距误差及单元对准误差都明显降低了双色器的性能,并且相比于Y方向的单元对准误差,具有矩形单元的双色器对于X方向的单元对准误差比较敏感。
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No.2860337901312341****
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