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Celwave FM 3 bay CFM-LP-3, need Vertical radiation pattern

R

raddad

Guest
Anyone know where I can find a vertical radiation pattern for a Celwave CFM-LP-3?
 
Just about any 3 bay full wave spaced antenna is going to show you a vertical pattern that's so close to the Celwave that statistically there will be no difference...
 
Thank so much, I agree with you. Just was fishing to see if anyone knew where I could find some actual measurements that could be used for a predicted ANSI filing. Looks like it's time to break out the ansi meter. Thanks again!
 
raddad said:
Thank so much, I agree with you. Just was fishing to see if anyone knew where I could find some actual measurements that could be used for a predicted ANSI filing. Looks like it's time to break out the ansi meter.
Click to expand...

The H&V-pol elevation patterns provided by antenna manufacturers are only theoretical, free-space values.

The true patterns when the antenna is installed on the tower depend on its mounting hardware, tower construction, elevation on the tower, whether leg- or face-mounted, frequency, conduit and ladder placement, and the presence/location of guy wires (at least).

Paper 6 at http://rfry.org shows some of these effects for a small FM antenna face mounted on two towers of different widths.

Probably you are better off to just measure your RFR performance, as you suggest.
//
 
Re: Celwave FM 3 bay.....is going to have a 3 db foward gain Vert

So that begining said that you would have to be on a tower face width of 36" to help the Horz patern match the Vert and as we know that gives you a foward pattern of a few miles more on your 60 db and all good with the FCC as Mr Fry says leg mounted isnt as good as face mounted in the direction you want to fource the sing good luck in this
 
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