Defocusing Losses in a Log Periodic-Fed Reflector.

Abstract

Log periodic designs are a well established wideband antenna technology, but one in which the phase center travels along the structure as the frequency varies. When a log periodic antenna is used as a feed for a reflector antenna, the phase center location cannot be maintained at the reflector focus over the frequency range and defocusing results. The purpose of this analysis is to quantify the defocusing loss for a long periodic-fed reflector. The analysis presented compares favorably with measured results. Author keywords include: Antenna losses; Reflector antenna; Wideband antenna.

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Document Details

Document Type
Technical Report
Publication Date
Dec 20, 1984
Accession Number
ADA151616

Entities

People

  • R. B. Dybdal

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Antennas
  • Bandwidth
  • Broadband Antennas
  • Corporations
  • Degradation
  • Displacement
  • Efficiency
  • Frequency
  • Geometry
  • Illumination
  • Log Periodic Antennas
  • Reflectors
  • Security
  • Space Systems

Fields of Study

  • Engineering

Readers

  • Radar Systems Engineering.