Analysis of Triangular Arrays of Josephson Tunnel Junctions
ERLANGEN-NUERNBERG UNIV (GERMANY) DEPTOF PHYSICS
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High frequency properties of underdamped Josephson junction arrays consisting of two rows of parallel biased cells are studied experimentally. Two row arrays of different geometries are investigated and compared with respect of their microwave power in the W-band. Comparative measurements have shown that, among the studied configurations, the best performance is obtained from an array with square cells and two horizontal junctions. In this array, the measured output power is up to 2 times larger than that in the array with only one horizontal junction, and up to 20 times larger with respect to the array with conventional triangular cells. Experimental data are in good qualitative agreement with previously reported numerical simulations of Yukon and Lin. We confirm that in square cell arrays an enhanced rf voltage can be extracted from the horizontal junctions.
- Solid State Physics