Looking for info about Yagi Uda antenna

hi there...
i want information about Yagi Uda antena..
where can i get the information abt it?
i aslo want to know how the Yogi uda antena design according to the geomectric of the place.
pleace help me buddies..
thank guys.

http://yb1zdx.arc.itb.ac.id/data/OWP...ok-2005/11.pdf

i thanx vfone........
thanx buddy...