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Modeling of a quasi-optical Josephson oscillator

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2 Author(s)
Liu, B. ; Dept. of Electr. Eng., Rochester Univ., NY, USA ; Wengler, M.J.

The authors have developed a computer model of a Josephson tunnel junction embedded in a general circuit with frequency-dependent impedance using the harmonic balance method. This model has been applied to the analysis of a two-dimensional Josephson junction array with integrated coupling structures, called a quasi-optical Josephson oscillator. Simulations are done for a junction with dipole, slotline, and bow-tie antennas. The results show that the junction with a bow-tie antenna gives the best performance, and the output power from an array of 4000 junctions can reach 25.7 mu W at a frequency as high as 1091 GHz for niobium junctions deposited on a 0.207-mm-thick quartz substrate.<>

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:1 ,  Issue: 4 )