>"I would think adding radials would lower the Radiation resistance. Also,
the SWR curve should narrow as ground losses are reduced; since the effect
of ground loss resistance swamping the results lessens."
The base resistance, not the radiation resistance is lowered by adding in
radials. At resonance, the antenna's feed-point equivalent circuit is two
resistors in series: Rr for the radiated component, and Rg for the loss
component. By lowering Rg, efficiency increases and feed-point resistance
is reduced when additional radials are added.
Paul, W9AC
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