Research Article

Electromagnetic Low-Frequency Dipolar Excitation of Two Metal Spheres in a Conductive Medium

Figure 4

The real and the imaginary parts of the approximated low-frequency scattered magnetic field 𝐇 for the orders 𝑛 = 0 , 2 , 3 . The two spheres have different radii 𝛼 1 = 2 5 m and 𝛼 2 = 5 0 m , while their centers are very close ( 𝑑 = 7 6 m ). The magnetic dipole is located at ( 𝑥 1 0 , 𝑥 2 0 , 𝑥 3 0 ) = ( 2 0 0 m , 0 m , 0 m ) and the measurement line probe is placed at ( 𝑥 1 𝑝 , 𝑥 2 𝑝 , 𝑥 3 𝑝 ) = ( 0 m , 2 0 0 m , [ 4 0 0 , 4 0 0 ] m ) , obtaining the field on the 𝑥 3 -axis.
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