Metal Roof?

Thinking about mounting a directional antenna on a metal slope roof. The antenna
does not have to be on the peak to get a good sightline. Anyone know if I need
to be concerned about reflection off the roof?

Clark W. Griswold, Jr. <73115 dot 1041 at compuserve dot com> wrote:
> Thinking about mounting a directional antenna on a metal slope roof. The antenna
> does not have to be on the peak to get a good sightline. Anyone know if I need
> to be concerned about reflection off the roof?

Think of the roof like a mirror, and the antenna like a torch.
The roof will reflect the radio waves.
If the antenna is not too close (20cm?) then you won't get much effect
other than this.

Ian Stirling <(E-Mail Removed)> wrote:

>Think of the roof like a mirror, and the antenna like a torch.
>The roof will reflect the radio waves.
>If the antenna is not too close (20cm?) then you won't get much effect
>other than this.

I'm thinking that as long as I use a directional with reasonable rejection,
there shouldn't be too much a problem. Thanks...

Clark W. Griswold, Jr. <73115 dot 1041 at compuserve dot com> wrote:
> Ian Stirling <(E-Mail Removed)> wrote:
>
>>Think of the roof like a mirror, and the antenna like a torch.
>>The roof will reflect the radio waves.
>>If the antenna is not too close (20cm?) then you won't get much effect
>>other than this.
>
> I'm thinking that as long as I use a directional with reasonable rejection,
> there shouldn't be too much a problem. Thanks...

Probably not.
Keep it a few wavelengths away, and you won't distort the radiation
pattern.
A little mast (1m) might not be a bad idea, if being very cautios.