Quasi-Optical Pulse Formation Using Triangular Arrays of Josephson Junctions
Final rept. Apr 1997-Mar 1998
MASSACHUSETTS INST OF TECH CAMBRIDGE
Pagination or Media Count:
A Josephson oscillator array was investigated through both DC and AC experiments. The simulations and analysis of Yukon and Lin suggested that arrays with three junctions per cell might have unique advantages as high frequency oscillators. These triangular arrays operate with a bias flux of half a flux quantum and power is coupled from the horizontal junctions. This configuration allows one to couple from a whole series of junctions that oscillate in-phase. The power was successfully measured from the horizontal junctions by two different methods. In collaboration with Dr. Cawthorne and Professor Lobb at University of Maryland, an on-chip detector junction was used and Shapiro steps were measured. Also, in collaboration with Dr. Caputo and Professor Ustinov at KFA in Juelich, Germany, a finline antenna was placed across the horizontal row of junctions and coupled power off-chip, to a room temperature receiver. Both experiments demonstrated a proof-of-concept, and future work should include improved matching to measure the maximum available power.
- Electrical and Electronic Equipment
- Solid State Physics