The Power-Dependent Test of High Temperature Superconductor CPW Transmission Line

摘要：

This paper presents a fabricated coplanar waveguide transmission line based on high-temperature superconductor thin-films (HTS), whose power-dependent performance is also tested here. We find that if the input is switched from low power to high power, i.e., the microwave current in the CPW line exceeds critical value, the transmission line transits from low-loss superconducting state to high-loss normal state at 77 K in liquid nitrogen, The power-dependent measurement is made in 2-5 GHz using 200 MHz frequency interval, and the critical power at each frequency is between 27-28 dBm. the surface impedance varies steeply from low level to high when transferred power reaches the critical value. This device is hopeful to be a microwave power limiter and the test result is useful for the development of the microwave power limiter.

关键词： superconducting nonlinearity superconductor microwave limiter critical power power-dependent test surface impedance.

作者: Zou Xiongfei Bu Shirong Luo Zhengxiang Ning Junsong Zeng Cheng

作者单位: School of Optoelectronic Information,University of Electronic Science and Technology of China,Chengdu 610054,China

会议类型: 国际会议

会议名称: 2011 10th International Conference on Electronic Measurement & Instruments(第十届电子测量与仪器国际会议 ICEMI2011)

会议地点: 成都

会议语种:英文

页码: 188-191

在线出版日期: 2011-08-16（万方平台首次上网日期，不代表论文的发表时间）