ELECTROMAGNETIC RADIATION IN MAGNETO-IONIC MEDIA FOR VLF AND VHF SPECTRA
A brief formulation of the fundamentals and salient features of the radiation of electromagnetic energy in a magneto-ionic medium is presented. Starting with the Maxwell-Lorentz theory of anisotropic media, a rather tutorial development terminates the formal solutions for the electromagnetic fields due to finite electric and magnetic current sources in such media. A set of potential functions for describing the electromagnetic fields of finite electric current sources is developed. Closed form solutions for the potential function are derived for both electric and magnetic dipoles in a homogeneous ionosphere by use of Fourier analysis and the associated Green's function. The determination of the radiation characteristics of an electric dipole arbitrarily oriented with respect to the static magnetic fieid or the gyrotropic axis of the magneto-ionic medium is examined with main emphasis on the field structure in the radiation zone. From the field structure the Poynting vector is determined for the VLF and the VHF spectra, and the net radiated power from the dipole. Radiation phenomena are compared with those for free space for the same dipole. The radiation properties of a magnetic dipole operating in the VHF and VLF spectra in or above the F-layer of the ionosphere are analyzed. Radiated power and radiation resistance are determined for each orientation of the dipole applicable to the VHF and VLF spectra. (auth)
- Research Organization:
- New Mexico. Univ., Albuquerque. Engineering Experiment Station
- NSA Number:
- NSA-17-022710
- OSTI ID:
- 4726369
- Report Number(s):
- AD-282156
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CONFIGURATION
CURRENTS
DIPOLES
ELECTRIC FIELDS
ELECTRIC MOMENTS
ELECTRODYNAMICS
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC WAVES
ENERGY
EQUATIONS
F-LAYER
FOURIER ANALYSIS
GREEN FUNCTION
IONOSPHERE
IONS
LAYERS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MATHEMATICS
OSCILLATIONS
PHYSICS
PLASMA
POYNTING VECTOR
RADIATIONS
SPECTRA
VECTORS