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arXiv 1502.02735astro-ph.IMastro-ph.CO
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一种小型滤波器组波导毫米波光谱仪

A Compact Filter-Bank Waveguide Spectrometer for Millimeter Wavelengths

Sean Bryan, George Che, Christopher Groppi, Philip Mauskopf, Matthew Underhill

摘要:

本文介绍了一种用于天文测量的毫米波信道化光谱仪的设计和测量。该设备是使用传统的高精度金属加工制造的,光谱仪可以平铺成2D阵列,以填充望远镜的焦平面。所制造的五通道器件的测量结果与使用HFSS和级联S矩阵方法的电磁模拟结果匹配良好。这激发了54通道R=200光谱仪的设计,该光谱仪在130-175 GHz和190-250 GHz大气窗口中填充矩形波导的单模通带,用于毫米波光谱映射和多目标光谱。

英文摘要:

We present the design and measurements of a 90GHz prototype of a millimeter-wave channelizing spectrometer realized in rectangular waveguide for astronomical instrumentation. The device was fabricated using conventional high-precision metal machining, and the spectrometer can be tiled into a 2D array to fill the focal plane of a telescope. Measurements of the fabricated five-channel device matched well with electromagnetic simulations using HFSS and a cascaded S-matrix approach. This motivated the design of a 54-channel R=200 spectrometer that fills the single-moded passband of rectangular waveguide in the 130-175 GHz and 190-250 GHz atmospheric windows for millimeter-wave spectroscopic mapping and multi-object spectroscopy.

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