On 6/3/16 4:18 AM, Steve Hunt wrote:
Plus, EZNEC assumes homogenous ground to infinite depth whereas I have
this:
http://www.karinya.net/bungalow/preparation/prep2.jpg
Steve G3TXQ
Indeed..
Although I've not modeled it, I would think that it's the top layer of
soil that really affects things.
Skin depth at 7m is about a meter or two (for 5mS-m conductivity) -
that's like 1.5-3 dB/meter loss.
So any "reflection" from the interface between layers is attenuated
substantially (and the reflection is unlikely to be 100%, anyway)
And, if you have sufficient rain/water/salt marsh to get your
conductivity up in to the 50mS/m range, skin depth is a foot.
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