Development of an SIS Mixer-Based Low-Noise Amplifier Amenable to Josephson Oscillator Pumping
Development of an SIS Mixer-Based Low-Noise Amplifier Amenable to Josephson Oscillator Pumping
复制标题
开发基于 SIS 混频器的低噪声放大器，适合约瑟夫森振荡器泵浦
DOI：
10.1109/tasc.2023.3254496
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发表时间：
2023
影响因子：
1.8
通讯作者：
Shan Wenlei
中科院分区：
文献类型：
--
作者：
Uzawa Yoshinori;Kojima Takafumi;Makise Kazumasa;Kawakami Akira;Kozuki Yuto;Masui Sho;Shan Wenlei
提出了一种低噪声、低功耗的微波放大器，它采用超导绝缘体超导体(SIS)混频器作为准粒子频率上变频器和准粒子频率下变频器，由约瑟夫森阵列振荡器泵浦。对采用Nb/Al-AlOx/Nb结级联的两个W波段波导混频器的概念验证研究表明，在接近DC到5 GHz的范围内，平均增益为6dB，噪声温度为12K。我们还设计并制作了100 GHz的约瑟夫森阵列振荡器，该振荡器由31个过阻尼约瑟夫森结组成，放置在NB微带线的每个半波长上。该振荡器在100Ghz处的输出功率估计为0.2GW，可以通过增加振荡器结数来提高输出功率。这些结果表明，所提出的基于SIS混频器的放大器适用于大规模多像素SIS接收器和量子计算机中的片上集成电路实现。
We propose a low-noise and low-power-consumption microwave amplifier using superconductor-insulator-supercon <?hbrk?> ductor (SIS) mixers as quasi-particle frequency up- and down-converters pumped by a Josephson array oscillator in the millimeter-wave band. A proof-of-concept study of an amplifier with two W-band waveguide mixers using Nb/Al-AlOx/Nb junctions in a cascade connection demonstrated an average gain of 6 dB and a noise temperature of 12 K from nearly DC to 5 GHz. We also designed and fabricated a Josephson array oscillator at 100 GHz, which consisted of 31 overdamped Josephson junctions placed at each half-wavelength in an Nb microstrip line. The estimated output power of the oscillator was 0.2 μW at 100 GHz, which can be increased by increasing the number of the oscillator junctions. These results suggest that the proposed SIS mixer-based amplifier is suitable for on-chip integrated circuits to be implemented in large-scale multipixel SIS receivers and quantum computers.