On Mon, 07 Feb 2005 16:54:15 -0700, Wes Stewart
wrote:


I'll admit that I've not followed this thread and don't intend to
punch any tar babies. But I must ask; what the hell is a "180 degree"
front lobe?

What he wants is a cartoid pattern, That is a "D" shaped roughly
pattern that's all from and not so much back.

The easy way to do that is a good colinear and mount it near
the flat face of a tower (usually less than 1/4 wave away) . The net
effect is slightly increased gain away from the tower and a mild null
on the other side of the tower. Most of the time this is not desired
but, there are valid cases where you don't wish to waste power behind
you. The most common is coastal commercial broadcat radio and TV.

Allison