On the Electromagnetic Pulse Response of a Dipole Over a Plane Surface

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Abstract
Using a surface impedance description, the electromagnetic fields of a vertical electric dipole are considered for a plane earth model. Particular attention is paid to the low-frequency region where the range to the observer may not be electrically large. The consequences in the time domain are also considered. Here, it is shown that the tail of the transient response is sensitive to the traditional low-frequency approximations that are usually accepted without question.

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