Radiation Characteristics of a Side Fire Helical Antenna

Abstract

Radiation characteristics are presented for a side fire helical antenna. The antenna consists of a vertical conducting cylinder, 5 wavelengths long, and two conducting helices, of larger diameter, wrapped around it, with opposite pitches, starting at half of the cylinder length, the feed point, and progressing toward the ends. It radiates mostly a horizontal polarized field. The horizontal pattern is approximately circular and the vertical forms a beam of 12 degrees (gain 5). The bandwidth is over 10%. It has only one feed point on the 5 wavelength aperture. It is very easy to build, self supporting, easily stacked to form an array and can also be used as self-diplexing. An exponentially decaying traveling current is assumed on the helices. The Fourier transform method for reducing the problem to a two dimensional one was used successfully. Computed and experimental data are presented showing good agreement.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1963
Accession Number
AD0423185

Entities

People

  • J. Perini

Organizations

  • Syracuse University

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Antennas
  • Bandwidth
  • Boundaries
  • Electrical Engineering
  • Engineering
  • Engineers
  • Equations
  • Experimental Data
  • Far Field
  • Frequency
  • Government Procurement
  • Governments
  • Helical Antennas
  • Helmholtz Equations
  • Standing Waves
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Mechanical Engineering/Mechanics of Materials.
  • Phased Array Antenna Design.