Gerhard, I am talking about omnidirectional antennas, which I think you call "rod". They do look like a rod. Vertical Beamwidth depends on the dBi gain. If you have a 15dBi gain antenna, it will be around 6 degrees vertically, I think. But it will travel very far.

With a 5dBi antenna, you have 40 degrees vertical beam width. But it won't travel as far.

Vertical beam width vs. dBi

--
Scott 
2007 A54 #69
SV Tengah
http://www.svtengah.com