Mr. Jinbiao Zhao Profile

Jinbiao Zhao

at Purple Mountain Observatory CAS

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Proceedings Article | 26 November 2023 Poster + Paper

One-dimensional linear integration technique for THz-band SIS

Yu-Min Fan, Bo-Liang Liu, Ming Yao, Jie Liu, Jin-Biao Zhao, Sheng-Cai Shi, Dong Liu

Proceedings Volume 12776, 127760R (2023) https://doi.org/10.1117/12.2686640

KEYWORDS: Superconductors, Astronomy, Terahertz radiation, Directional couplers, Cryogenics

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Superconductor-Insulator-Superconductor (SIS) mixers are currently the most widely used detectors in astronomical observations in the terahertz band. To meet the demands of future large-aperture terahertz radio telescopes for multipixel applications, this work focused on the integration technology of a 660 GHz 1×4 one-dimensional linear array SIS mixers. The SIS mixers based on Nb/AlN/NbN twin tunnel junctions. We developed the uniform distribution of local oscillator power by using an integrated waveguide and multi-path local oscillator power distribution network. We also integrated the passive frequency doubler and tripler at low temperature, and integrated four low-noise amplifiers with the mixer in the same block, resulting in a more compact structure. As a result, we successfully realized the simultaneous operation of four mixers in a cryogenic Dewar. This paper will provide a detailed description of the relevant design and testing results.

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