UTILIZATION OF THE RECIPROCITY THEOREM TO DETERMINE THE NEAR FIELD AIR- TO-SUBSURFACE PROPAGATION FORMULAS

Abstract

The electric and magnetic field components produced by vertical and horizontal dipoles (both electric and magnetic types) located at or above the surface of a plane, conducting, homogeneous earth are derived for the near field range. The height h of the transmitting antenna is > or = 0(+), while the depth z of the receiving antenna is < or = 0(-) (air-to-subsurface propagation). ionospheric effects are neglected. The derivations are based upon application of the reciprocity theorem to previously derived field components. It is observed that these equations reduce to well-known expressions when the horizontal separation between the transmitting and receiving antennas is much greater than h.

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Document Details

Document Type
Technical Report
Publication Date
Nov 22, 1966
Accession Number
AD0646855

Entities

People

  • Peter R. Bannister

Organizations

  • Navy Underwater Sound Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Antennas
  • Classification
  • Connecticut
  • Contracts
  • Coordinate Systems
  • Dipole Antennas
  • Dipoles
  • Electric Fields
  • Equations
  • Lepidoptera
  • Magnetic Dipoles
  • Magnetic Fields
  • Near Field
  • Security
  • Underwater Sound

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering