Curt Christianson wrote:
Hi Mike,

That is a very complex subject. I would go to the library and check out a
good book on antenna theory. "The ARRL Antenna Book", while aimed at amateur
radio operators would still provide you with more theory than you're likely
to even need to know. An excellent book!

To learn specifically about Yagi antennas, it's hard to beat Lawson's
_Yagi Antenna Design_.

Roy Lewallen, W7EL