{"title":"Development of wideband feed with sharp cut-off frequency OMT for RFI","authors":"","doi":"10.46620/rfi22-015","DOIUrl":null,"url":null,"abstract":"•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","PeriodicalId":186234,"journal":{"name":"Proceedings for RFI 2022","volume":"56 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings for RFI 2022","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.46620/rfi22-015","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
•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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