Microwave-power handling capability of HgBa[sub 2]CaCu[sub 2]O[sub 6+δ] superconducting microstrip lines

Aga, Roberto S.; Xie, Yi-Yuan; Yan, Shao-Lin; Wu, Judy Z.; Han, Siyuan S.
October 2001
Applied Physics Letters;10/8/2001, Vol. 79 Issue 15, p2417
Academic Journal
Measurement of microwave-power handling capability, performed on high-temperature superconducting HgBa[sub 2]CaCu[sub 2]O[sub 6+δ] (Hg-1212) microstrip lines, was carried out at a microwave frequency of 1 GHz and temperatures ranging from 77 to 120 K. These samples were prepared using a different route in which direct patterning on Hg-1212 was avoided to minimize their moisture exposure. Microwave input power was swept to high levels to drive the samples from a linear (less dissipative) state into nonlinear (more dissipative) state. Critical input power (P[sub c]) was determined to be the crossover between the two states. The P[sub c] values observed for Hg-1212 microstrip lines were 29.3, 25.8, 23, and 16 dBm at 80, 90, 100, and 110 K, respectively. These P[sub c] values, comparable with the best obtained so far on other superconductors at lower temperatures, are orders of magnitude better at 100 K or higher, suggesting that Hg-1212 is promising for microwave devices and circuits operating above 100 K or higher temperatures. © 2001 American Institute of Physics.


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