ANALYSIS AND DESIGN OF THE LOG-PERIODIC DIPOLE ANTENNA

Abstract

A mathematical analysis of the logarithmically periodic dipole class of frequency independent antennas, which takes into account the mutual coupling between dipole elements, is described. The input impedance, directivity, and bandwidth, as well as the input current and voltage of the several elements, are calculated. A new concept, the bandwidth of the active region, is formulated and is used to relate the size and operating bandwidth of the antenna. The limiting values of the various parameters that describe the antenna are explored. The results from the mathematical model are shown to be in good agreement with measurements. A step by step procedure is presented which enables one to design a log-periodic dipole antenna over a wide range of input impedance, bandwidth directivity, and antenna size.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1961
Accession Number
AD0264558

Entities

People

  • Robert L. Carrel

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Antennas
  • Bandwidth
  • Birds
  • Computer Programs
  • Coordinate Systems
  • Dipole Antennas
  • Electromagnetic Fields
  • Frequency
  • Frequency Bands
  • Geometry
  • Impedance
  • Mathematical Analysis
  • Mathematical Models
  • Measurement
  • Standing Waves
  • Waves

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Phased Array Antenna Design.