| 亚毫米波射电天文用超导SIS接收机的研制(英文) |
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| 引用本文： | 史生才.亚毫米波射电天文用超导SIS接收机的研制(英文)[J].紫金山天文台台刊,2003(1). |
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| 作者姓名： | 史生才 |
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| 作者单位： | 中国科学院紫金山天文台 南京210008 |
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| 摘 要： | 为了研制亚毫米波射电天文用超导SIS(超导 -绝缘体 -超导 )接收机 ,我们重点开展了如下研究 ,1 )Nb超导SIS结在其能隙频率附近的量子混频特性 ,及其结合高能隙超导薄膜 (NbTiN)和高电导率金属薄膜 (Al)分布结阵在 780 - 950GHz频率区间的量子混频特性 ;2 )亚毫米波超导混频器嵌入阻抗的数值和实验表征 ;3)高电流密度小面积Nb超导SIS结的制备和特性表征 ;4)一个 60 0 - 72 0GHz超导SIS混频器的研制和特性表征。本文详细介绍了相关的数值分析和实验测量结果。
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| 关 键 词： | 亚毫米波 超导SIS结 量子混频 接收机 低噪声和嵌入阻抗 |
DEVELOPMENT OF SUBMILLIMETER SUPERCONDCUTING SIS MIXERS FOR RADIO ASTRONOMY |
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| Authors: | Shi Sheng-Cai Purple Mountain Observatory National Astronomical Observatories Nanjing JiangSu China |
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| Institution: | Shi Sheng-Cai Purple Mountain Observatory National Astronomical Observatories Nanjing,JiangSu 210008,China |
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| Abstract: | To develop high-sensitivity SIS (Superconductor-Insulator-Superconductor) mixers for submillimeter radio astronomy, we have carried out the following studies, 1) numerical simulation of the quantum mixing behaviors of Nb tunnel junctions around its gap frequency and distributed Nb junction arrays with different superconducting/normal metal films, 2) numerical and experimental characterizations of the mixer embedding impedance, 3) fabrication of high-current-density Nb SIS (Superconductor-Insulator-Superconductor) junctions, and 4) development and characterization of a 600-720 GHz SIS mixer. Detailed simulation and experimental results are presented in this paper. |
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| Keywords: | submillimeter superconducting SIS junction quantum mixing receiver low noise and embedding impedance |
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