Here's another vote for 4NEC2. Particularly helpful is the 3D visualization of
the pattern in multi-colors. Everyone I show a pattern to on-screen instant
understands the antenna pattern when they see that display. The 3D graphical
editor seems for me easy to understand and quick to use.
http://home.ict.nl/~arivoors/
Arie has been helpful with bug fixes, there's a user's forum linked to his
website.
http://fornectoo.freeforums.org/index.php
-- Tom, N5EG
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