Josephson Array Oscillators Using Resonant Effects in Shunted Tunnel Junctions


IEICE TRANSACTIONS on Electronics   Vol.E79-C   No.9   pp.1242-1246
Publication Date: 1996/09/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Toward Digital and Analog Applications of Superconductors)
Category: Analog applications
Josephson array,  shunted tunnel junction,  RLCSJ model,  LCR resonator,  microstrip line,  

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Resonant properties of resistance shunted tunnel junctions have been investigated using the RLCSJ model. We found that an increase in dc current resulted from an increase in impedance of the shunted tunnel junctions. The static and dynamic properties of the shunted tunnel junctions were described in detail by numerical simulations and experiments. The simulated and measured results showed good agreement in I-V characteristics. A Josephson array oscillator has been proposed using the resonant properties for increasing oscillator output impedance. We designed and fabricated the oscillator with 20 shunted tunnel junctions. The output power of the oscillator delivered to the load resistor was estimated to be about 0.5µW at 312 GHz.