It is a NEC2 version compiled for Linux ELF with some enhancements together with a graphic post-processor based on Yorick.
NEC2 is compiled with the capability of handling 3000 segments. (MiniNEC can handle only 100).
For instance the post-processor can display in X-windows the plots of the computed radiation patterns or the gain versus frequency.
The post-processor produces PostScript files of the plots that later
printed or converted in other formats.
It can do much more: read the attached DOC to know all the capabilities.
What's new ?
Current version is the 1.4 ; The new version, dated 30th dec. 2007, has been recompiled with f77 available on Debian 4.0 R1 and with math. coprocessor. ...and now it is distributed under the GPL GNU licence !!
Interested ? so Download it ! It is free for radio amateur use. (Use Shift-click on "Download" in case of strange characters on the page )
Here are few examples:
Let's see the radiation from a 9 el. yagi tonna in the free space.
For example here is the result of the analysis of a 9el yagi tonna.
Let's see now the same antenna orizontal 3 meters over ground.
Here is how the antenna performs in the band from 144 MHz to 146 MHz.
This is the Forward Gain
This is the SWR
This is the Back Gain ... and this is the F/B ratio that's why it was so bad
on the Oscar 13 !
Finally this is the input impedance (without matching network) plotted on
a Smith chart.
(The real X output has colors on it: in the conversion from .ps to .gif I have
lost them !)