RF Attenuation Measurement System Using a SQUID,

Abstract

This report describes a unique portable system for measuring attenuation at 30 MHz over a range of 50 dB to an accuracy of 0.005 dB per 20 dB. This system does not require any reference standard. A SQUID (Superconducting Quantum Interference Device) with its associated instrumentation is used to determine attenuation in terms of Bessel Function Zeros. A SQUID is a loop of superconducting metal closed by a weak point contact called a Josephson junction, operating in liquid helium. The system specifications, description, and theory of operation are presented. A complete system operating procedure including data reduction techniques is given along with a discussion of sources of errors. Considerable additional information and diagrams are presented as an aid to the user in understanding and operating the system. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1977
Accession Number
ADA046831

Entities

People

  • Donald B. Sullivan
  • Nolan V. Frederick
  • Robert T. Adair

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Amplifiers
  • Coaxial Cables
  • Data Reduction
  • Detection
  • Detectors
  • Ions
  • Magnetometers
  • Materials Science
  • Measurement
  • Modulation
  • Oscillators
  • Power Supplies
  • Resonant Circuits
  • Schematic Diagrams
  • Signal Generators
  • Signal Processing

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Electronics Engineering
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Quantum Computing