At 1/27/2007 10:45, you wrote: >I don't think you are going to be able to model it to your satisfaction with >any software you or I could afford. Perhaps you need to adopt an empirical >approach, put up an antenna and see what you get. Drive test it, take field >strength readings, plot and graph the real world data as much as you want. >Then you can add in small tweaks in spacing, heading and gain.
If the water tower face is sufficiently large compared to your wavelength (70 cm?), it will just look like an infinite vertical ground, in which case your pattern away from the tower will be 3 dB above the omni spec for your antenna, & coverage behind will be 0. Bob NO6B
