High-frequency wave sources using Josephson-junction arrays
Results from Josephson-junction arrays used as high-frequency wave sources are presented. Phase-locked Josephson-junction arrays having a large number of junctions were developed to meet the need for compact submillimeter-wave sources for use in such applications as satellite communications are receivers for radioastronomical observations. The design, fabrication processes, and measurement are discussed. Distributed arrays of 40 junctions in which all Josephson junctions are placed at wavelength intervals were fabricated and tested. Such arrays can deliver about 1 [mu]W of power into a 20-60 [Omega] load resistor in the frequency ranger from 100 to 500 GHz, the upper limit being set by the large loss of the superconducting microstrip. Compact arrays were designed and fabricated to eliminate the loss of the superconducting microstrip. Those arrays have also demonstrated an output power level about 1 [mu]W into a 15 [Omega] load from 100 GHz up to 620 GHz. Characteristics of the Josephson junction source, including the power level, impedance matching, the tunability, the radiation linewidth, and tuning rate (or frequency-modulation) are discussed.
- Research Organization:
- State Univ. of New York, Stony Brook, NY (United States)
- OSTI ID:
- 6911977
- Country of Publication:
- United States
- Language:
- English
Similar Records
Submillimeter wave generation using Josephson junction arrays
Submillimeter wave generation using Josephson junction arrays
Related Subjects
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC IMPEDANCE
ELECTROMAGNETIC RADIATION
ENERGY LOSSES
FABRICATION
FILMS
IMPEDANCE
JOSEPHSON JUNCTIONS
JUNCTIONS
LOSSES
POWER LOSSES
RADIATIONS
RADIOWAVE RADIATION
SHORT WAVE RADIATION
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
TESTING