[BC] Directional Antenna Proofs - Ground systems.

[Robert Meuser]

Those VHF systems fall under the category of having elevated radials. 
Elevated radials function differently than does a buried ground system. 
Richard seems to be playing with his new found ability to model buried 
wires with his shiny new NEC4 license.

On 6/21/12 2:13 PM, jpotter at jpotter.com wrote:
> "That loss is relatively high in this 2-radial case, and antenna system efficiency is reduced. But that
> would not produce any directional effects in the horizontal plane."
>
> Au Contraire:  My experience with VHF and UHF commercial and amateur 'ground plane' antennas using flat or drooping wire radials, is that the horizontal plane radiation flows along the radials, leaving voids inbetween radials.  This was verified at the test range of an antenna manufacturer with which I was customer engineering manager.  Therefore I believe your example of only two radials would also cause voids everywhere inbetween.  What otherwise would be the requirement for the standard 120-90 degree radials for a series-fed antenna?  Check Laport's 1954 text.
>