Impedance matched Josephson parametric amplifier with a multisection λ/4 transmission line transformer
We report the fabrication and characterization of an impedance matched Josephson parametric amplifier (IMPA). A multisection λ/4 transmission line transformer (TLT) is utilized, which can reduce the input impedance and provide a wide impedance matched bandwidth. In addition, the whole IMPA device is fabricated on a LaAlO3 substrate with a dielectric constant of 23.4, much larger compared to the commonly used intrinsic silicon substrate, to provide larger grounded capacitance, making the fabrication of the multisection λ/4 TLT more precise and reliable. The experimental results show that by adjusting the working point, the amplifier has a bandwidth of 580 MHz with a gain of more than 15 dB. The average input saturation power is about −115 dBm within the bandwidth. Additionally, its noise performance is close to the quantum-limited level.
Authors
- Shiyao Yang
- Kaixuan Zhang (ORCID: https://orcid.org/0000-0002-9958-6018)
- Yifan Sheng
- Quan Zuo
- Tianshi Zhou
- Guozhu Sun (ORCID: https://orcid.org/0000-0002-7847-3460)
- Lingxiao Jing (ORCID: https://orcid.org/0000-0001-6940-4634)
- Jiyuan Zhu (ORCID: https://orcid.org/0009-0007-9603-9004)
- Huashi Ma
- Wenqu Xu (ORCID: https://orcid.org/0000-0002-9780-6355)
- Peiheng Wu (ORCID: https://orcid.org/0000-0003-2663-8953)
- Junzhou Zhang (ORCID: https://orcid.org/0000-0001-7049-1931)
- Mingyuan Yu
- Binglin Li (ORCID: https://orcid.org/0000-0001-5635-8456)
- Jinpeng Li (ORCID: https://orcid.org/0000-0002-6226-8956)
- Zishuo Li (ORCID: https://orcid.org/0000-0003-4744-455X)
- Tingting Guo (ORCID: https://orcid.org/0000-0002-1953-5449)
- Jiazheng Pan
- Chunhai Cao
- Sining Zhou
- Yongyang Yu
Institutions
- Hefei University (CN)
- Purple Mountain Laboratories (CN)
- Nanjing University (CN)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2025-03-01
- DOI
- https://doi.org/10.1063/5.0250918
- Citations
- 3
- Primary Topic
- Advanced Electrical Measurement Techniques
- Type
- article
- Field-Weighted Citation Impact
- 2.19
Funders
- National Natural Science Foundation of China