Anti-Skywave AM Broadcast Antenna Design.

Abstract

This thesis investigates the design of an anti-skywave (ASW) AM broadcast antenna. The parameters of a typical AM broadcast antenna are presented first. Then the design proposed is studied by numerical modeling with the Numerical Electromagnetic Code (NEC). Biby's proposed design involves a ring of short radiators with a conventional monopole operating over finite ground. To analyze the behaviour of Biby's proposed ASW antenna, a generic radiator study is conducted to test the ability of different sized radiators to launch the sky wave and the ground wave first as isolated elements and then as closely coupled radiators with cancelling phasing. Finally, some potential candidate structures are proposed for AM broadcast transmission which might achieve the desired characteristics of ground wave enhancement and sky wave suppression. Keywords; Monopole and dipole antennas; Numerical Electromagnetic Code (NEC).

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1987
Accession Number
ADA181559

Entities

People

  • Sarfraz Hussain

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computers
  • Data Sets
  • Electric Fields
  • Electrical Engineering
  • Engineering
  • Frequency
  • Ground Control Stations
  • Integral Equations
  • Jet Propulsion
  • Magnetic Fields
  • Medium Frequency
  • Military Research
  • Radiation
  • Radiation Patterns
  • Schools
  • Sky Waves
  • Universities

Fields of Study

  • Engineering

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Phased Array Antenna Design.