Title :
Approximate formulas for lateral electromagnetic pulses from a horizontal electric dipole on the surface of one-dimensionally anisotropic medium
Author :
Li, Kai ; Lu, Yilong ; Li, Minghui
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
fDate :
3/1/2005 12:00:00 AM
Abstract :
In this paper, approximate formulas are derived for the electromagnetic pulse due to a delta-function current in a horizontal electric dipole on the planar boundary between a homogeneous isotropic medium and one-dimensionally anisotropic medium. The components of the electric field consist of two delta-function lateral pulses which decrease with the amplitude factor ρ-2 and travel along the boundary with different velocities and different amplitudes. Also, it is noted that the formulas for the time-dependent magnetic field components obtained by Fourier transforms from the approximate formulas in the frequency domain are not adequate.
Keywords :
Fourier transforms; anisotropic media; antenna theory; dipole antennas; electromagnetic pulse; Fourier transforms; anisotropic medium; delta-function current; horizontal electric dipole; lateral electromagnetic pulses; time-dependent magnetic field components; Anisotropic magnetoresistance; EMP radiation effects; Earth; Fourier transforms; Frequency domain analysis; Geometry; Helium; Magnetic fields; Region 1; Region 2; Anisotropic medium; lateral pulse; orizontal electric dipole;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.842604