Simple Methods for Calculating the Azimuthal Coverage of HF Directional Antennas.

Abstract

Methods of calculating the azimuthal coverage of HF directional antennas are described and worked examples are given. Particular attention is paid to spherical trigonometry formulas employing auxiliary quantities because of their suitability for use with simple hand-held electronic calculators. The relationships between sides and angles of oblique spherical triangles, collated from several sources, are listed and the value of applying tests based on these relationships prior to making detailed solutions of spherical triangle problems is demonstrated. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1981
Accession Number
ADA102872

Entities

People

  • G. May

Organizations

  • Royal Aircraft Establishment

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Antennas
  • Calculators
  • Conversion
  • Directional
  • Directional Antennas
  • Equations
  • Foreign Languages
  • Geometry
  • Latitude
  • Longitude
  • Materials
  • Plastic Explosives
  • Quadrants
  • Right Angles
  • Triangles
  • Trigonometry

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Instructional Design and Training Evaluation.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics