Hi Rudy,
Not PSO, but you may wish to check out AutoEZ which is an Excel app that drives
EZNEC. Its optimizer uses the Nelder-Mead simplex algorithm. One of the
models used during beta testing was a 5-6 element, 5 band quad with 108 wires
and 1236 segments. I'm guessing that might be well beyond the size of your 20m
wire Yagi.
You can find a complete description of the AutoEZ optimizer here:
http://ac6la.com/aeoptimize.html
If you'd care to contact me off-list and provide a model file I'd be happy to
do some sample runs for you. AutoEZ can read the model file that you might
have been using with 4nec2. Any SY (symbol) cards will be automatically
converted to AutoEZ variables. Or, if you have an EZNEC (.ez) format model we
can easily "variable-ize" that to use with the optimizer.
The AutoEZ home page is:
http://ac6la.com/autoez.html
Note that AutoEZ requires both EZNEC and Microsoft Excel. It cannot be run
under Open Office, Office Libre, or Kingsoft Office. None of those programs
fully support the 27000 lines of Visual Basic code contained in the package.
As for PSO, I believe Justin Johnson, G0KSC, of InnoVAntennas uses a custom PSO
package for his designs. You could check with him for details as to general
availability.
Dan, AC6LA
http://ac6la.com
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