Title :
Improvements in the millimeter-wave subsystem for Josephson junction array voltage standard systems
Author :
Yoshida, Haruo ; Sakamoto, Yasuhiko ; Klein, Udo ; Endo, Tadashi
Author_Institution :
Advantest Sendai Lab. Co. Ltd., Japan
fDate :
12/1/1993 12:00:00 AM
Abstract :
Improvements in the millimeter-wave subsystem have been accomplished to provide higher millimeter-wave power to a Josephson junction array chip. The 94-GHz oscillator output power has been increased to 90 mW by incorporating an InP Gunn diode. The frequency stability of the InP Gunn oscillator is maintained at 10-10 of the center frequency. A low-loss dielectric waveguide has been installed in liquid helium to reduce the insertion losses of the millimeter waves to 3 dB/2.5 m. The improved millimeter-wave system has been confirmed to operate well in a Josephson junction array voltage standard system for voltage calibration at the 1-V level with the specified accuracy
Keywords :
Gunn oscillators; Josephson effect; calibration; dielectric waveguides; frequency stability; measurement standards; superconducting integrated circuits; superconducting junction devices; voltage measurement; 1 V; 90 mW; 94 GHz; EHF; Gunn oscillator; InP; InP Gunn diode; Josephson junction array; MM-wave subsystem; frequency stability; liquid helium; low-loss dielectric waveguide; millimeter-wave subsystem; voltage calibration; voltage standard systems; Dielectric losses; Diodes; Frequency; Gunn devices; Indium phosphide; Josephson junctions; Oscillators; Power generation; Stability; Voltage;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
