On the transmission line model for lightning return stroke representation

Details On the transmission line model for lightning return stroke representation On the transmission line model for lightning return stroke representation

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30asc13b&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 24, pp. ASC 13-1, CiteID 2294, DOI 10.1029/2003GL018407

Physics

1

Electromagnetics: Electromagnetic Theory, Electromagnetics: Transient And Time Domain, Meteorology And Atmospheric Dynamics: Atmospheric Electricity, Meteorology And Atmospheric Dynamics: Lightning

Scientific paper

The widely used transmission-line (TL) model of lightning return stroke in a vertical channel is most rigorously represented by a vertical phased array of current sources that produce a spherical transverse electromagnetic (TEM) wave in the case of return-stroke speed v equal to the speed of light c. If the radius of the lightning channel were equal to zero, the equivalent representation could be obtained by applying a hypothetical infinitesimal source of pure spherical TEM wave at the bottom of the channel. A non-zero-radius vertical wire above ground excited by a practical source at its bottom end cannot support unattenuated current waves, and the associated electromagnetic field structure is non-TEM.

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