use this to phase two antennas together for increased gain.
http://www.qsl.net/n9zia/wireless/appendixF.html#6
http://www.moonraker.com.au/techni/cables.htm
information on benefits of balun in radio reception.
http://www.hard-core-dx.com/nordicdx/antenna/feed/balun3.html
Part of a Masters thesis by Joachim Johansson and Urban Lundgren. Starts out with derivations of the general transmission line equations, followed by the time-harmonic equations. This is followed by derivation of basic transmission line formulas, such as
http://www.sm.luth.se/~urban/master/Theory/4.html
http://www.ee.surrey.ac.uk/Personal/D.Jefferies/stubs.html
This document has pictures and some basic information on BNC, TNC, N, UHF, C. SMA, SMB, SMC and APC-7.
http://nocat.net/connectors.html
http://www.tpub.com/neets/book10/41.htm
http://www.ee.surrey.ac.uk/Personal/D.Jefferies/radimp.html