FAR-FIELD PATTERN PREDICTION FOR SHIPBOARD ANTENNAS

Abstract

Shipboard antennas operate in the vicinity of the ship's super- structure which consists of numerous metallic scatterers of various sizes and shapes. The far-field patterns of shipboard antennas are perturbed by these scat/scatterers and are therefore difficult to predict. In this report a method is discussed for approximating the far-field pattern in the horizontal plane of a thin vertical antenna (e.g., a whip antenna) near cylindrical scatterers of arbitrary cross-section whose physical heights are at least that of the antenna. The method is based on approximating the antenna with an infinite line source and the scatterer with an array of thin infinite wires. Some representative calculated and experimental results are presented which generally show very good agreement between the predicted and measured patterns. In addition, limitations of the method are discussed and the computer programs for calculating the far-field patterns are explained in some detail.

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Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1965
Accession Number
AD0463370

Entities

People

  • Gary A. Thiele

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bessel Functions
  • Computer Programs
  • Computers
  • Digital Computers
  • Electric Fields
  • Electrical Engineering
  • Electronics Laboratories
  • Engineering
  • Environment
  • Equations
  • Far Field
  • Government Procurement
  • Measurement
  • Models
  • Scattering
  • United States
  • Universities

Fields of Study

  • Engineering

Readers

  • Phased Array Antenna Design.
  • Radar Systems Engineering.
  • Structural Dynamics.