On 12/2/22 2:41 PM, Jim Brown wrote:
On 12/2/2022 10:46 AM, Jeff Blaine wrote:
At Dayton/Xenia antenna forum this year 2022, N9NB had a pretty
interesting talk on low band verticals. The key take-away from that
was that you could reasonably determine your actual ground loss based
on VNA measurement of your antenna, and comparing it with the model
of same. Of course the caviets apply - the more simple and idealized
your antenna is in reality, the easier it is to closely model the
reality of the install and get a better set of ideal numbers to
compare the measured against.
The likely unknown here is the soil characteristic plugged into the
model, as compared to what we have. :)
So much so that the way you measure the soil characteristic is by
plugging different numbers into the model until it matches the measurement.
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