An Investigation of the Uses of Time Domain Capable Vector Network Analyzers as a Diagnostic for Helix Traveling-Wave Circuits

Abstract

The purpose of this project is to investigate the uses of time domain capable vector network analyzers as diagnostics for the design and test of helix traveling-wave tubes (TWT's). The uses of the time domain (TD) investigated included tracking the location of a bead in the circuit, determining the phase velocity versus frequency using the gating methods available in the time domain, and locating faults and discontinuities along the helix circuit. Good agreement with expected results were obtained for the phase velocity versus frequency in a 2-8 GHz circuit, except at the band edges, and uses for fault location were demonstrated. Another method was devised using the complex nature of the data without going into the time domain to measure phase velocity versus frequency data. This method proved to be more accurate overall than the time domain method. Keywords: Vector network analyzer, Helix TWT, Time domain, and Diagnostics.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA192460

Entities

People

  • James V. Davis Ii

Organizations

  • University of Utah

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Analyzers
  • Classification
  • Discontinuities
  • Electrical Engineering
  • Equivalent Circuits
  • Failure Mode And Effect Analysis
  • Frequency
  • Frequency Domain
  • Measurement
  • Phase Shift
  • Phase Velocity
  • Security
  • Test Fixtures
  • Time Domain
  • Transmission Lines
  • Traveling Waves

Readers

  • Computational Modeling and Simulation
  • Electronics Engineering
  • Statistical inference.