Abstract
The transient fields, in the time-domain, of a thin circular loop antenna, on a two-layered earth’s model are reexamined when the usually neglected magnetic permeability contrast is considered. It is shown that for a two-layered earth model, where the upper layer is permeable, the transient fields are modified over the nonpermeable case. The fields in the time domain are obtained as the inverse Laplace transforms of derived full wave time-harmonic solution. These time-domain solutions are obtained as a summation of waveguide modes plus contributions from branch cuts in the complex plane of the longitudinal wave number. The results should be useful for interpreting airborne electromagnetic systems and in cases where super-paramagnetic mineral constant is present.
Similar content being viewed by others
References
J.R. Wait: Can. J. Phys.29 (1951) 577.
J. Ryu, H.F. Morrison, and S.H. Ward: Geophysics35 (1970) 862.
V.K. Gaur: But. Nat. Geophys. Res. Inst. (India)1 (1963) 167.
K.A. Nabulsi and J.R. Wait: IEEE Trans. Geosci. Remote Sensing GE35 (1997) 287.
J.R. Wait: Can. J. Phys.50 (1972) 1055.
Samira T. Bishay, Osama M. Abo Seida, and Ghada M. Sami: IEEE Trans. Geosci. Remote Sensing39 (2001) 894.
Samira T. Bishay and Ghada M. Sami: Can. J. Phys.80 (2002) 955.
J.R. Wait: Can. J. Phys.31 (1953) 670.
J.R. Wait: Appl. Sci. Res. B7 (1958) 73.
J.R. Wait: IEEE Trans. Antennas Propag. AP14 (1966) 790.
J.A. Fuller and J.R. Wait: Geoexploration10 (1972) 221.
J.R. Wait and S.F. Mahmoud: Radio Sci.43 (1999) 557.
J.R. Wait: inAntenna Theory (Eds. R.E. Collin and F.J. Zucker), Mc Graw-Hill, New York, 1969, Part 2, Ch. 24.
A. Ezzeddine, J.A. Kong, and L. Tsang: J. Appl. Phys.53 (1982) 813.
I.S. Gradshteyn and I.M. Ryzhik:Tables of Integrals, Series and Products, Academic Press, New York, 1965.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sami, G.M. Influence of a magnetically permeable surface layer on transient fields for a thin circular loop antenna. Czech J Phys 54, 403–412 (2004). https://doi.org/10.1023/B:CJOP.0000020580.80547.fc
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1023/B:CJOP.0000020580.80547.fc