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3D-Structured Polyethylene Windows for Low-Loss Transmission in Wideband Cryogenic Terahertz Systems

François Joint et al.
HAL (France) · Papers
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We present the design, fabrication, and characterization of a broadband vacuum window and infrared filter based on ultra-high molecular weight polyethylene (UHMWPE) for millimeter-wave receivers operating across ALMA Band 6 and 7 (211–373 GHz). The window incorporates pyramidal anti-reflection struc
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