There are several good wire multiband antenna options with minimal
compromise in performance and matching on each of several bands.
One example is shown in my article in the ARRL Antenna Compendium V.
Although it is not a single wire, it can be made of wire and uses a
single feedline. There are many other possibilities as well.
A good modeling program would let you explore them before building.
I am not presently aware of shareware or freeware programs that are
readily used by a beginner. All the commercial programs I've seen
are worth the money -- I happen to use EZNEC by W7EL (firstname.lastname@example.org)
because I think it's the easiest one for making "tweaks" and
adjustments to the design.
73, Gary Breed
> 1. I would like to start modeling antennas before building them. I
> have never used modeling software before, and for that reason am
> reluctant to buy a commercial package at present. Does anyone know of a
> "best" shareware package that will allow me to get my feet wet and,
> after some use, make an informed decision on a commercial package?
> 2. Here is the problem that led to the above decision: I have a
> limited setup on my property for antennas and must make do with a single
> wire. I am interested in only the 20/15/10 meter part of the spectrum.
> Would I get better service out of an EDZ cut for 20 and taking what I
> can get on the other two bands, or cutting the EDZ for 10 and settling
> for whatever happens on the others?
> Thanks in advance for any feedback.
> LenW, KK7TA
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