[TowerTalk] trees and verticals

[K8RI]

On 12/28/2011 12:26 PM, Roger Parsons wrote:
> Jim Lux wrote:
>
> "You're describing the difference between the near field (wooden element
> in Yagi) and far field (propagating through a box)."
>
> Not really. The box could be in the near field or the far field (I know
> it would then be quite a big box:-), and it would still attenuate the
> signal received from the antenna at a distant point.

Probably not if it were made of dry wood.  If really close to the 
antenna it would behave much like the plastic insulation/dielectric on a 
wire requiring the wire/antenna to be shortened a bit, but I doubt you'd 
be able to measure any attenuation

73

Roger (K8RI)