SIS mixers study on Heterodyne Array Receiver Program (HARP) at JCMT

Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X Pub Date : 2020-12-13 DOI:10.1117/12.2561192

Kuan-Yu Liu, Ming-jye Wang, C. Tong, P. Friberg, G. Fuller, Tse-Jun Chen, Yen-Pin Chang, Wei-Chun Lu, D. Bintley, Ming-Tang Chen, Chih-Chiang Han, S. Yen, J. Dempsey, Shaoliang Li, C. Walther, Vernon Demattos, J. Cookson, G. Bell, Xue-Jian Jiang, H. Parson, I. Mizuno, Taishi Nammoto, Weiye Zhong

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引用次数: 1

Abstract

We have fabricated new superconductor-insulator-superconductor (SIS) mixers chips for the 16-element Heterodyne Array Receiver Program (HARP) instrument on the James Clerk Maxwell Telescope (JCMT). The original spare mixer chips were limited and not performed as well as the used ones in HARP. The ability to manufacture new mixer chips would therefore be important for the repair and upgrade of HARP. Our immediate goal is to replace the current nonfunctional mixers in HARP with new chips. We modified the designs of waveguide probe and the matching circuit of the SIS mixer chip. The newly designed chips were fabricated with a quality factor (Rsg/Rn) over 10. The double-sideband (DSB) receiver noise temperature (Trx) is lower than 80K at frequencies between 325 GHz and 375 GHz, which is comparable to the best of the original devices. Three of the sixteen mixers have been replaced and they work very well.

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外差阵列接收机程序(HARP)的SIS混频器研究

我们为詹姆斯克拉克麦克斯韦望远镜(JCMT)上的16元外差阵列接收程序(HARP)仪器制作了新的超导体-绝缘体-超导体(SIS)混频器芯片。原来的备用混频器芯片是有限的，并且不像在HARP中使用的那样好。因此，制造新混频器芯片的能力对于HARP的维修和升级非常重要。我们的直接目标是用新芯片取代目前HARP中无功能的混频器。我们修改了波导探头的设计和SIS混频器芯片的匹配电路。新设计的芯片的质量因子(Rsg/Rn)大于10。在325 GHz和375 GHz之间的频率范围内，双向带(DSB)接收器噪声温度(Trx)低于80K，可与原始器件的最佳性能相媲美。16台搅拌机中有3台已经更换，它们工作得很好。

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Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X

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