Hysteresis effect in microwave power transmission of high temperature superconducting coplanar transmission lines

F. Gao, Z. Zhou, M. Feng, M. Scharen, A. Cardona, R. Forse

Research output: Contribution to journalArticlepeer-review

Abstract

We have observed an unusual hysteresis loop in rf power dependence of high-temperature superconductor (HTS) coplanar transmission lines. At 77 K and 1 GHz, the signal transmission was linear (insertion loss <0.1 dB) until the input power (Pin) reached a critical value of Pc=0.4 W. An abrupt drop by ∼37 dB in the transmitted power (Pout) was observed at Pin=Pc followed by a slow increase (P out∝Pin0.62) for Pin> P c. As Pm was then decreased, it retraced the previous curve only until Pin=Pc. However, as Pin was reduced further Pout did not rise until Pin=158 mW, at which Pout started to increase rapidly and returned to the linear regime for Pin<71 mW. Such a sharp transition and a strong hysteresis effect were unique to the HTS line whereas a gold line with an identical structure did not exhibit these characteristics. This behavior may be utilized for potential applications of new HTS microwave power (current) limiters and switches. Several possible origins for the hysteresis effect are proposed and discussed.

Original languageEnglish (US)
Pages (from-to)2229
Number of pages1
JournalApplied Physics Letters
Volume67
DOIs
StatePublished - 1995

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Hysteresis effect in microwave power transmission of high temperature superconducting coplanar transmission lines'. Together they form a unique fingerprint.

Cite this