Electromagnetic fields generated by finite-length wire sources: comparison with point dipole solutions

2010 ◽  
Vol 59 (2) ◽  
pp. 361-374 ◽  
Author(s):  
Rita Streich ◽  
Michael Becken
Keyword(s):  
Electromagnetic Fields ◽  
Finite Length ◽  
Point Dipole

Subsurface Electromagnetic Fields of a Grounded Cable of Finite Length

1973 ◽  
Vol 51 (14) ◽  
pp. 1534-1540 ◽  
Author(s):  
David A. Hill ◽  
James R. Wait
Keyword(s):  
Electromagnetic Fields ◽  
Finite Length ◽  
Line Source ◽  
Low Frequency ◽  
Frequency Limit ◽  
Special Cases ◽  
General Field ◽  
Finite Line ◽  
Radio Location ◽  
Finite Line Source

The subsurface fields of a finite line source or current-carrying cable are examined. Some special cases, such as the low-frequency limit, are treated analytically, and some simple working formulas are obtained. The general field expressions are reduced to single integrals with finite limits that are evaluated numerically. It is shown that if the source cable is sufficiently long, the fields are approximated by those for an infinite cable. The results have possible application to downlink communication and radio location of trapped miners.

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