大口径射电望远镜超宽带接收机技术发展

发布时间：2018-04-27 21:12

本文选题：射电望远镜 + 超宽带　；参考：《中国科学:物理学力学天文学》2017年05期

【摘要】：新疆奇台拟建的110m全可动射电望远镜(QiTai Radio Telescope,QTT),在引力波探测、黑洞发现、恒星形成、星系起源等基础科学研究领域将发挥重要作用,并可发展应用于深空探测,如探月工程与火星和金星探测.满足众多科学需求需装备超宽带、多波束、高灵敏度接收机系统,而大口径射电望远镜接收机技术面临众多挑战.本文论述了国内外射电天文领域大口径射电望远镜接收机技术发展,包含超宽带馈源/极化器、超宽带低噪声放大器、多波束接收机技术的发展与现状,分析了接收机研制过程中的难点与挑战.基于QTT科学目标和技术进展,给出了初期的接收机系统配置方案,分析了接收机的馈电形式、关键器件研制与选型、关键问题与难点.
[Abstract]:The 110m fully mobile radio telescope proposed by the Xinjiang Qitai Radio TelescopeTTT will play an important role in the fields of gravitational wave detection, black hole discovery, star formation, galaxy origin and other basic scientific fields, and can be applied to deep space exploration. Such as lunar exploration and exploration of Mars and Venus. To meet many scientific needs, UWB, multi-beam and high-sensitivity receiver systems are needed, while the receiver technology of large aperture radio telescope is facing many challenges. This paper describes the development of receiver technology for large aperture radio telescope in the field of radio astronomy at home and abroad, including the development and present situation of ultra-wideband feed / polarizer, ultra-wideband low-noise amplifier and multi-beam receiver. The difficulties and challenges in the development of the receiver are analyzed. Based on the scientific goal and technical progress of QTT, the initial configuration scheme of receiver system is given. The feed form of receiver, the development and selection of key devices, the key problems and difficulties are analyzed.
【作者单位】：中国科学院新疆天文台;中国科学院射电天文重点实验室;
【基金】：国家重点基础研究发展计划(编号:2015CB857100) 国家自然科学基金(编号:U1431230,11473061)资助
【分类号】：TH751

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