论文标题
三波混合的约瑟夫森旅行波参数放大器的数值分析，带有工程分散载荷
Numerical analysis of a three-wave-mixing Josephson traveling-wave parametric amplifier with engineered dispersion loadings
论文作者
论文摘要
最近提出的基于梯子传输线的Josephson Traveling-Wave参数放大器（JTWPA），该梯子传输线由射频鱿鱼组成并利用三波混合（3WM），在获得20 dB的增益和至少4 GHz的平面带宽方面具有巨大的潜力。 To realize this concept in practical amplifiers we model the advanced JTWPA circuit with periodic modulation of the circuit parameters (engineered dispersion loadings), which allow the basic mixing process, i.e., $ω_s=ω_p-ω_i$, where $ω_s$, $ω_p$, and $ω_i$ are the signal, the pump, and the idler frequencies, respectively, and efficiently suppress propagation of unwanted higher tones including $ω_{2p}=2ω_p$, $ω_{p+s}=ω_p +ω_s$, $ω_{p+i} = ω_p + ω_i$, etc. The engineered dispersion loadings allow achieving sufficiently wide $3$ dB-bandwidth from $3$ GHz to $9$ GHz combined with a相当小的波纹（$ \ pm2 $ db）在增益频率依赖性中。
The recently proposed Josephson traveling-wave parametric amplifier (JTWPA) based on a ladder transmission line consisting of radio-frequency SQUIDs and exploiting three-wave mixing (3WM), has great potential in achieving both a gain of 20 dB and a flat bandwidth of at least 4 GHz. To realize this concept in practical amplifiers we model the advanced JTWPA circuit with periodic modulation of the circuit parameters (engineered dispersion loadings), which allow the basic mixing process, i.e., $ω_s=ω_p-ω_i$, where $ω_s$, $ω_p$, and $ω_i$ are the signal, the pump, and the idler frequencies, respectively, and efficiently suppress propagation of unwanted higher tones including $ω_{2p}=2ω_p$, $ω_{p+s}=ω_p +ω_s$, $ω_{p+i} = ω_p + ω_i$, etc. The engineered dispersion loadings allow achieving sufficiently wide $3$ dB-bandwidth from $3$ GHz to $9$ GHz combined with a reasonably small ripple ($\pm2$ dB) in the gain-versus-frequency dependence.
