3 KHz SQUID Receiver Development.

Abstract

We have designed and tested a model for a 3 kHz receiver using a superconducting antenna circuit and a SQUID (Superconducting QUantum Interference Device) amplifier. Q factors as high as 6400 have been demonstrated for the resonant antenna, giving it an extremely low intrinsic noise voltage. We have anlayzed and solved various problems of matching between antenna and SQUID, as well as measuring noise, contributed by materials in the surrounding cryostat. We have been able to use feedback from the SQUID amplifier into the antenna to effectively broaden the 3 dB bandwidth to 1200 Hz without raising the noise level of the system significantly. By scaling the results obtained with our model receiver to an antenna volume of .022 M-cubed we have been able to estimate that a noise level of 2.4 x 10 to the -17th power T/(sq.rt. Hz) could be obtained in a 100 Hz bandwidth. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1978
Accession Number
ADA069709

Entities

People

  • M. B. Simmonds
  • R. P. Giffard
  • W. A. Fertig

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Attenuation
  • Circuits
  • Control Systems
  • Detection
  • Detectors
  • Dynamic Range
  • Equations
  • Frequency Response
  • Impedance
  • Magnetic Fields
  • Magnetometers
  • Measurement
  • Resistance
  • Resonant Circuits
  • Resonant Frequency
  • Transmission Lines

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Phased Array Antenna Design.
  • Superconducting Magnet Technology

Technology Areas

  • Quantum Computing