190-GHz radiation from a quasioptical Josephson junction array

Author

Wengler, Michael J. ; Guan, Boran ; Track, Elie K.

Author_Institution

Dept. of Electr. Eng., Rochester Univ., NY, USA

Volume

43

Issue

4

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

984

Lastpage

988

Abstract

At 190 GHz, 0.36 μW has been detected from an 11×58 array of niobium Josephson junctions. The power is radiated directly into free space above the surface of the two-dimensional array of junctions. Detection is made by a commercial bolometer outside the array cryostat. The junctions in the array are closely spaced in the y-dimension, but spaced by more than one-half wavelength in the x-direction. This asymmetry results in mutual phase-locking between adjacent junctions suitable for the production of y-polarized radiation. The resonance anti asymmetry also results in a reasonable impedance match between the Josephson junctions and the free-space radiation mode

Keywords

millimetre wave oscillators; niobium; phase locked oscillators; superconductor-insulator-superconductor devices; tunnel diode oscillators; 0.36 muW; 190 GHz; Nb; QIO; adjacent junctions; bolometer detection; mutual phase-locking; quasioptical Josephson junction array; quasioptical Josephson oscillator; resonance anti asymmetry; two-dimensional array; y-polarized radiation; Bolometers; Coupling circuits; Frequency; Impedance; Josephson junctions; Niobium; Oscillators; Production; Resonance; Superconducting microwave devices;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.375264

Filename

375264