[Antennas] Help needed in EZNEC model for trap dipole driven element

Wed Apr 6 15:24:27 EDT 2005

Right, and the reason is the model. Can you or would you spend weeks 
getting all the accurate data needed to make an accurate model? Really 
measuring the characteristics of the dirt under and around your antenna 
for many wavelengths? Or just throw in the average ground values ;-) 
Do any of us really know how far above RF ground the antenna is? 
(Hint: it is not AGL) What do you do to allow for the house you live 
in, which is probably close by, and the neighbors, any trees and even 
the feed line? Or just get close, make it 2% long and trim to fit<G>
I go with the latter myself ;-)
Gary WA6DTX
fkamp at comcast.net wrote:
> [snip]
>>The land of EZNEC is a wonderous world of comparisons. I find it useful
>when comparing performance of different antenna designs. I am not sure
>how useful it is modeling real antennas. There are many location and
>installation quirks it may not consider. EZNEC is wonderful in making
>comparisons and getting close to a final design, but I have never
>implemented an EZNEC design that did not require some tweaking of wire
>or tubing during construction.
>>Regards,
>Frank Kamp
>K5DKZ
>>