RFI用锐利截止频率OMT宽带馈电的研制

Proceedings for RFI 2022 Pub Date : 1900-01-01 DOI:10.46620/rfi22-015

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摘要

•Tsys:冷却LNA的效果要好3-4倍，但价格昂贵。→LNF-LNR4-14B供室温使用，受预算限制。η值:20-50%就足够了，因为更多的努力需要更多的时间。•D:将小台(MARBLEs)的碟形天线从1.5/1.6 m替换为2.4 m。•Bw:比传统S/X波段VLBI带宽大10倍。发展宽带馈电是最经济有效的途径。Hideki UJIHARA，京都大学可持续人类圈研究所(RISH)

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Development of wideband feed with sharp cut-off frequency OMT for RFI

•Tsys: 3-4 times better by cooled LNA, but expensive. →LNF-LNR4-14B for room temperature used by the limitation of the budget. •η: 20-50% is enough, for more effort will take more times. •D: Dish of small stations(MARBLEs) were replaced from 1.5/1.6 m to 2.4 m. •Bw: 10 times larger bandwidth than traditional S/X band VLBI. →Development of wideband feed was the most cost effective way. Hideki UJIHARA, Research Institute for Sustainable Humanoshpere(RISH) of Kyoto University

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Proceedings for RFI 2022

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