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Mutual electromagnetic coupling of coaxial loops in a borehole
Author(s) -
Fuller James A.,
Wait James R.
Publication year - 1973
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs008i005p00453
Subject(s) - borehole , coaxial , electrical impedance , coupling (piping) , geology , homogeneous , electromagnetic field , physics , electromagnetic radiation , mechanics , acoustics , geophysics , optics , materials science , geotechnical engineering , engineering , telecommunications , thermodynamics , composite material , quantum mechanics
The exact integral solution is obtained for the fields of a small circular loop that is coaxially located in a cylindrical borehole in homogeneous rock. The result is employed to calculate the mutual impedance between two coaxial loops within the borehole. It is found that, under most conditions, mutual impedance does not depend on the presence of the borehole, and thus the configuration is well suited for electromagnetic probing of the host rock.