Bob, an excellent book i used to have about antennas is this one here: http://www.amazon.com/Arrl-Antenna-Book-19th-CD-ROM/dp/0872598047

everything you ever wanted to know is in there, and more.

if you're really interested, it's well worth the price.

See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery