Title :
Modeling of a quasi-optical Josephson oscillator
Author :
Liu, B. ; Wengler, M.J.
Author_Institution :
Dept. of Electr. Eng., Rochester Univ., NY, USA
Abstract :
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.<>
Keywords :
Josephson effect; electronic engineering computing; microwave antenna arrays; microwave oscillators; solid-state microwave circuits; superconducting junction devices; 0.207 mm; 1091 GHz; 25.7 muW; Josephson tunnel junction; Nb-SiO/sub 2/; bow-tie antennas; computer model; computer simulation; dipole antenna; frequency-dependent impedance; harmonic balance method; integrated coupling structures; output power; quartz substrate; quasi-optical Josephson oscillator modelling; slot line antenna; two-dimensional Josephson junction array; Circuit simulation; Computational modeling; Coupling circuits; Dipole antennas; Embedded computing; Frequency; Impedance; Josephson junctions; Oscillators; Slotline;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
