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EM Fields And Radiation Resistance Due To A Loop Type Of Antenna In A Conductive Medium

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Author(s): Bordalai Jugal P | Duorah H.L

Journal: IETE Journal of Research
ISSN 0377-2063

Volume: 53;
Issue: 4;
Start page: 347;
Date: 2007;
Original page

ABSTRACT
In this paper electromagnetic (EM) fields and radiated power from a small loop type antenna in a conductive (lossy) medium in VLF and LF ranges are studied theoretically. The derived field equations can also be used for free space, by applying proper simplification to the expression for the propagation constant. The equations are valid for the values of the ratio of antenna radius to nearest field point distance equal to or less than 0.1 and the radius of the antenna to be equal to or less than 2/IYI Is the magnitude of the propagation constant in a conductive medium. Validation of the derived equations is shown by use of Maxwell’s equations and by comparison of the simplified expressions for free space by another method.
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