Propagation of electromagnetic pulses around the earth

Author

Levy, B.R. ; Keller, J.B.

Author_Institution

Inst. of Mathematical Sciences, Div. of Electromagnetic Res., New York University, NY., USA

Volume

6

Issue

1

fYear

1958

fDate

1/1/1958 12:00:00 AM

Firstpage

56

Lastpage

61

Abstract

The propagation of electromagnetic pulses around the earth is investigated analytically. The pulses are assumed to be produced by a vertical electric or magnetic dipole. The earth is treated as a homogeneous sphere of either finite or infinite conductivity and the atmosphere is assumed to be homogeneous. It is found that very short pulses become longer the further they propagate, in addition to diminishing in amplitude. The duration of a pulse which is initially a delta-function increases as $\\theta^{3}$ where $\\theta$ is the angle between source and receiver. The results are represented as products of several factors, which we call the amplitude factor, the pulse-shape factor, the time-dependent height-gain factors for the source and receiver, and the conductivity factor. Graphs of these factors and of the pulse shape for several cases are given.

Keywords

Electromagnetic transient propagation; Ground-wave propagation; Atmosphere; Conductivity; EMP radiation effects; Earth; Electromagnetic analysis; Electromagnetic propagation; Electromagnetic transients; Magnetic analysis; Pulse shaping methods; Shape;

fLanguage

English

Journal_Title

Antennas and Propagation, IRE Transactions on

Publisher

ieee

ISSN

0096-1973

Type

jour

DOI

10.1109/TAP.1958.1144554

Filename

1144554