[Antennas] MODELING_PROGRAM_SIMPLE?

[Jack Painter]

George,  I doubt there is such a thing as you describe, probably because it
would be completely unrealistic to let a software program make so many
assumptions.  I have heard experts, including some of the better program
designers, debate for weeks on how to estimate the effects of soil
conductivity in both the near and far field. And they did not appear to be
splitting hairs, as all of the variables have a material effect on the
outcomes.

The dipole in our yards barely resembles the one in free space, as ours
might be only a 1/4 wave above soils of widely varying composition,
proximity to structures, trees, etc. I admire the honestly of the
programmers who were not looking for an easy graphic program to pretend
something that cannot exist, might.

Jack
Virginia Beach

>
>Let me ask this question again with a twist.
>First thank you to all that responded to my question asking for a
>free antenna modeling program.
>I down loaded the MMANA modeling program and I don't have a clue
>at what it is asking for or what it's output will be. I guess I'm
>just not with it.
>
>Is there a MODELING PROGRAM that asks for the length of the
>dipole, height above ground, and then outputs the polar display of
>the lobs vertical and horizontal? Maybe the feed impedance as well?
>The MMANA is talking X, Y and Z??? Then seems to give a vector
>display of which I don't know what it means.
>This program looks too complicated for me?
>All I want to know is how the lobs look at various dipole lengths.
>Thanks.
>George