DocumentCode :
1547965
Title :
Transient fields of a horizontal electric dipole on a multilayered dielectric medium
Author :
Dai, Renshou ; Young, Charles T.
Author_Institution :
Dept. of Electr. Eng., Michigan Technol. Univ., Houghton, MI, USA
Volume :
45
Issue :
6
fYear :
1997
fDate :
6/1/1997 12:00:00 AM
Firstpage :
1023
Lastpage :
1031
Abstract :
The transient electric fields of a horizontal electric dipole excited by a short pulse current and located on a layered dielectric medium were analyzed using the Cagniard-de-Hoop method. The fields are expressed as the convolution of the exciting current with the layered medium response. The layered medium response is obtained directly from the integral representation for the electric fields in the frequency domain and is expressed as a finite integral. In contrast to the conventional frequency synthesis approach, the Cagniard-de-Hoop (1960) method proves to be computationally more efficient and numerically more stable. Compared with the asymptotic approach, the solution involves no approximation. The nature of the various waves, reflected waves (guided wave and leaky wave), and lateral waves can be easily recognized on the Cagniard integral path. Numerical results are obtained to provide a rigorous forward modeling for the geo-radar operating on layered media
Keywords :
antenna radiation patterns; antenna theory; dipole antennas; electric fields; frequency-domain analysis; integral equations; numerical stability; radar antennas; transient analysis; Cagniard integral path; Cagniard-de-Hoop method; antenna radiation; computationally efficient method; convolution; dipole antenna; electric fields; finite integral; forward modeling; frequency domain; georadar; guided wave; horizontal electric dipole; integral representation; lateral waves; layered medium response; leaky wave; multilayered dielectric medium; numerically stable method; reflected waves; short pulse current; transient electric fields; Convolution; Dielectrics; Dipole antennas; Frequency domain analysis; Frequency synthesizers; Integral equations; Nonhomogeneous media; Physics computing; Time domain analysis; Transient analysis;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.585751
Filename :
585751
Link To Document :
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