Adaptive Time Delay Circuitry for Interference Cancellation Systems.

Abstract

The objective of this research program was to study and investigate variable time delay techniques for use in interference cancellation systems so as to improve their performance. A comprehensive survey of past research pertaining to HF, VHF, and UHF variable time delay techniques was undertaken. The survey also included microwave variable time delay techniques that are adaptable to the lower bands. As part of this program, variable delay lines were constructed and experimental measurements performed. Specifically, two types of delay lines were investigated, one using a coaxial transmission section with a helix surrounding a ferrite rod and the other a powdered ferrite and dielectric loaded coaxial section. The report presents experimental results over the HF, VHF, and UHF bands. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1980
Accession Number
ADA086326

Entities

People

  • Donald E. Clark
  • William A. Hardell

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Waves
  • Bandwidth
  • Curie Temperature
  • Delay Lines
  • Dielectric Permittivity
  • Dielectrics
  • Frequency Bands
  • Group Velocity
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Properties
  • Materials Laboratories
  • Measurement
  • Surface Acoustic Waves
  • Transducers
  • Transmission Lines
  • Wave Propagation

Readers

  • Business Analytics
  • Microwave Engineering.
  • Radio communications and signal processing.