Impedance matched Josephson parametric amplifier with a multisection λ/4 transmission line transformer
Abstract
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.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (21)
Tianshi Zhou
Wenqu Xu
Quan Zuo
Shenzhen Key Laboratory of Micro/Nano-Porous Functional Materials (SKLPM), SUSTech-Kyoto University Advanced Energy Materials Joint Innovation Laboratory (SKAEM-JIL), Guangdong-Hongkong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices and Department of Chemistry
Jiazheng Pan
Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University 1 , Nanjing 210023,
Zishuo Li
Kaixuan Zhang
School of Medicine
Tingting Guo
Beijing Institute of Basic Medical Sciences
Yifan Sheng
Lingxiao Jing
Huashi Ma
Mingyuan Yu
Jiangsu Key Laborartory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Joint International Research Laboratory of Climate and Environment Change, School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology
Shunhong Zhou
Binglin Li
Shiyao Yang
Yongyang Yu
Jiyuan Zhu
Junzhou Zhang
Jinpeng Li
Chunhai Cao
Guozhu Sun
Peiheng Wu