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Author Topic: Theoretical maximum losses for a vertical  (Read 13310 times)
RFRY
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« Reply #15 on: September 27, 2014, 02:21:09 PM »

Below is a NEC4.2 graphic of the surface waves radiated by a 1/4-wave monopole driven against four elevated, 1/4-wave radials, for two values of earth conductivity.

There isn't much difference between the fields at 0.1 km for these systems whether using a perfect ground plane or a 5 mS/m ground plane -- so their system radiation efficiencies must be similar.

Most of the difference is due to the greater ground plane losses for lower earth conductivities, even for very short paths.

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