超导微波延迟线及其制冷的研究

采用 YBCO/ La Al O3薄膜制作出 5ns和 1 0 ns超导微波延迟线 ,并以小型斯特林制冷机作冷源 ,给出了延迟线的延迟和插损特性。在 77K,1 GHz、5GHz、1 0 GHz时 5ns延迟线的插损分别为0 .1 2 d B/ ns、0 .55d B/ ns、1 .2 d B/ ns;1 0 ns超导微波延迟线在 2 GHz、4 GHz、6GHz插损分别为 0 .1 9d B/ ns、0 .4 4d B/ ns、0 .63 d B/ ns。描述了器件与制冷的设计、制作过程

The Research of HTS Superconducting Microwave Delay Lines and Cooling System

In the paper, the 5ns and 10ns HTS microwave delay lines fabricated of YBCO/LaAlO 3 thin films are described and cooled by Stirling refrigerator. The design, fabrication and experimental results are also presented. At 77K, insertion loss of 5ns delay line is 0.12dB/ns at 1GHz, 0.55dB/ns at 5GHz, 1.2dB/ns at 10GHz. The insertion loss of 10ns delay line is 0.19dB/ns at 2GHz, 0.44dB/ns at 4GHz, 0.63dB/ns at 6GHz.