A wideband fixed-tuned SIS receiver for 200-GHz operation
A wideband fixed-tuned SIS receiver for 200-GHz operation
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DOI：
10.1109/22.375257
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发表时间：
1995-04
影响因子：
4.3
通讯作者：
R. Blundell;C. Tong;D. Papa;R. Leombruno;Xiaolei Zhang;S. Paine;J. Stern;H. Leduc;B. Bumble
中科院分区：
文献类型：
--
作者：
R. Blundell;C. Tong;D. Papa;R. Leombruno;Xiaolei Zhang;S. Paine;J. Stern;H. Leduc;B. Bumble
我们报道了一种外差接收机的设计和开发，设计覆盖频率范围为176- 256ghz。该接收机采用铌超导体-绝缘体-超导体（SIS）隧道结混频器，主要是出于可靠性和易于操作的原因，采用固定调谐波导设计。片上调谐提供谐振出结的几何电容，并产生良好的匹配波导电路。在第一个测试接收器上的实验室测量表明，在接收器平均噪声温度低于50 K的情况下，达到了所需的输入带宽（约40%）。在某些频率下观察到混频器转换增益，并且测量到的最低接收器噪声小于30k。此外，该接收器中使用的SIS混频器结构简单，易于组装，因此是复制的良好候选。>
We report on the design and development of a heterodyne receiver, designed to cover the frequency range 176-256 GHz. This receiver incorporates a niobium superconductor-insulator-superconductor (SIS) tunnel junction mixer, which, chiefly for reasons of reliability and ease of operation, is a fixed-tuned waveguide design. On-chip tuning is provided to resonate out the junction's geometric capacitance and produce a good match to the waveguide circuit. Laboratory measurements on the first test receiver indicate that the required input bandwidth (about 40%) is achieved with an average receiver noise temperature of below 50 K. Mixer conversion gain is observed at some frequencies, and the lowest measured receiver noise is less than 30 K. Furthermore, the SIS mixer used in this receiver is of simple construction, is easy to assemble and is therefore a good candidate for duplication. >