论文标题
通过ka带niobium pillbox腔中的超导触点进行参数放大
Parametric amplification via superconducting contacts in a Ka band niobium pillbox cavity
论文作者
论文摘要
超导参数放大器通常是使用平面传输线制造的，该平面传输线具有约瑟夫森连接或薄膜的内在动力电感提供的非线性电感。但是，Banys等。 [1]报道了尼伯族药丸箱腔中的非线性行为，假设在TC以下，这对虹膜纤维络合物将充当超导的接触表面，利用了约瑟夫森样的非线性。这项工作通过应用Keysight Technologies的高级设计系统（ADS）进一步研究了这种效果，以使用包括用户定义的Josephson电感组件的等效电路模型来模拟腔。模拟表明，对于以Nu0 = 30.649 GHz为中心的共振，将两个音调（泵和信号）注入腔内时，会发生混合和参数增益。当将谐振器带到分叉能量时，探索了最大可实现的增益。将这些结果与矢量网络分析仪提供泵和信号的低温测量结果进行了比较。
Superconducting parametric amplifiers are commonly fabricated using planar transmission lines with a non-linear inductance provided by either Josephson junctions or the intrinsic kinetic inductance of the thin film. However, Banys et al. [1] reported non-linear behaviour in a niobium pillbox cavity, hypothesising that below Tc, the pair iris-bulk resonator would act as a superconducting contact surface exploiting a Josephson-like non-linearity. This work investigates this effect further by applying Keysight Technologies' Advanced Design System (ADS) to simulate the cavity using an equivalent circuit model that includes a user defined Josephson inductance component. The simulations show that for a resonance centred at nu0 = 30.649 GHz, when two tones (pump and signal) are injected into the cavity, mixing and parametric gain occur. The maximum achievable gain is explored when the resonator is taken to its bifurcation energy. These results are compared to cryogenic measurements where the pump and signal are provided by a Vector Network Analyzer.
