论文标题
宽带Josephson参数放大器，具有集成传输线变压器
Wideband Josephson Parametric Amplifier with Integrated Transmission Line Transformer
论文作者
论文摘要
我们描述了使用集成紧凑型超导传输线变压器进行阻抗匹配的宽频段约瑟夫森参数放大器（JPA）。阻抗变压器由在Ruthroff拓扑结构中配置的两条宽边耦合输电线组成，可实现从2到18 GHz的宽匹配带宽，从而使输入线阻抗和设备共振质量因子降低了4个。这使得在Amplifier的调谐范围的选择方面可以增益平坦，并具有灵活性。该放大器具有高达20dB的增益，次数少于1 dB，2-3 GHz增益带宽产物和-126 dBM输入1-DB压缩点。此外，设备活动区域拟合到1mm x 1mm的空间中，从而放松整合到大量子系统中。
We describe a wide-band Josephson Parametric Amplifier (JPA) that is impedance-matched using an integrated compact superconducting transmission line transformer. The impedance transformer consists of two broadside coupled transmission lines configured in a Ruthroff topology which enables a wide matching bandwidth from 2 to 18 GHz, reducing the input line impedance and the device resonance quality factor by a factor of 4. This enables gain flatness and flexibility in the choice of the amplifier's tuning range. The amplifier has up to 20dB gain, with less than 1 dB of ripple, 2-3 GHz gain-bandwidth product and -126 dBm input 1-dB compression point. Moreover, the device active area fits into a 1mm x 1mm space, thus easing integration into large quantum systems.
