论文标题
高密度超导微波设备阵列的柔性同轴带电缆
Flexible Coaxial Ribbon Cable for High-Density Superconducting Microwave Device Arrays
论文作者
论文摘要
超导电子通常需要高密度的微波互连，能够在温度阶段之间传输信号，并以最小的损失，交谈和热传导。我们报告了超导53 wt％NB-47 wt％Ti（NB47TI）的设计和制造。十个迹线由0.076毫米O.D.组成。 NBTI内导体用PFA（0.28 mm O.D.）绝缘，并在共享0.025 mm厚的NB47TI外导体中鞘。电缆通过G3PO同轴推动连接器终止于通过不锈钢毛细管油管（1.6毫米O.D.，0.13毫米厚）焊接到Coplanar Wave指南过渡板上。 30厘米长的电缆在8 GHz时具有1 dB的损失，即-60 dB最近的邻居前横式谈话。损失比市场上的不匹配引起的损失比市场上的不匹配是由电缆中的制造瑕疵引起的。据报道的串扰比以前开发的层压NBTi-Onkapton微带电缆低30 dB。我们估计热载荷从1 K到90 mK，每迹痕迹为20 nW，大约是来自Cryocoax的最小市售超导同轴电缆的计算载荷的一半
Superconducting electronics often require high-density microwave interconnects capable of transporting signals between temperature stages with minimal loss, cross talk, and heat conduction. We report the design and fabrication of superconducting 53 wt% Nb-47 wt% Ti (Nb47Ti) FLexible coAXial ribbon cables (FLAX). The ten traces each consist of a 0.076 mm O.D. NbTi inner conductor insulated with PFA (0.28 mm O.D.) and sheathed in a shared 0.025 mm thick Nb47Ti outer conductor. The cable is terminated with G3PO coaxial push-on connectors via stainless steel capillary tubing (1.6 mm O.D., 0.13 mm thick) soldered to a coplanar wave guide transition board. The 30 cm long cable has 1 dB of loss at 8 GHz with -60 dB nearest-neighbor forward cross talk. The loss is 0.5 dB more than commercially available superconducting coax likely due to impedance mismatches caused by manufacturing imperfections in the cable. The reported cross talk is 30 dB lower than previously developed laminated NbTi-onKapton microstrip cables. We estimate the heat load from 1 K to 90 mK to be 20 nW per trace, approximately half the computed load from the smallest commercially available superconducting coax from CryoCoax
