How much lose: Antenna through window

How much signal strength do you loose by putting an outdoor antenna for
wireless networking behind a glass window, for instance a particular
wireless access point is advertising as having a range of 150 metres indoors
and up to 1200 metres outdoors.

Thanks

None. Radio waves pass through glass the same as light waves do.

"Tony" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> How much signal strength do you loose by putting an outdoor antenna for
> wireless networking behind a glass window, for instance a particular
> wireless access point is advertising as having a range of 150 metres indoors
> and up to 1200 metres outdoors.
>
> Thanks
>
>

On Tue, 02 Sep 2003 18:30:30 GMT, "John Eckart" <(E-Mail Removed)>
wrote:

>None. Radio waves pass through glass the same as light waves do.
>
>"Tony" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
>> How much signal strength do you loose by putting an outdoor antenna for
>> wireless networking behind a glass window, for instance a particular
>> wireless access point is advertising as having a range of 150 metres indoors
>> and up to 1200 metres outdoors.

Unless it's "Hi-E" glass, which seems to reflect more WiFi than it
passes....

-Shel

Tony wrote:

> How much signal strength do you loose by putting an outdoor antenna for
> wireless networking behind a glass window, for instance a particular
> wireless access point is advertising as having a range of 150 metres indoors
> and up to 1200 metres outdoors.
>
> Thanks

A pane of plain ol glass has very little attenuation normally. However,
there are some modern glass windows that have metallic coatings that
cause quite a bit of signal loss. While it's safe to laugh at the
advertised distances, the fact that the outdoors rating is eight times
as much is due to the lack of walls, flourescent lights and other
obstructions and sources of interference. Getting a working connection
at 1200 meters with those tiny rubber-ducky antennas is not very
realistic. Use decent directional antennas at both ends and it's easy
(given clean line of sight).

Thanks fellows
I am not sure what type of glass it is, but outside the window is aluminium
mesh with 50 to 70mm holes in it. I also don't have line of sight which is
another problem, but I thought if it does have 1200 metre range, it might go
the ~600 to 650 metres I need to go. There is a two storey building and
trees between them. I didn't what to put a mast up because gremlins get up
on the roof and I don't think it would last long.



"Sheldon T. Hall" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Tue, 02 Sep 2003 18:30:30 GMT, "John Eckart" <(E-Mail Removed)>
> wrote:
>
> >None. Radio waves pass through glass the same as light waves do.
> >
> >"Tony" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> >> How much signal strength do you loose by putting an outdoor antenna for
> >> wireless networking behind a glass window, for instance a particular
> >> wireless access point is advertising as having a range of 150 metres
indoors
> >> and up to 1200 metres outdoors.
>
> Unless it's "Hi-E" glass, which seems to reflect more WiFi than it
> passes....
>
> -Shel

The mesh you have will reflect the signal.

"Tony" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> Thanks fellows
> I am not sure what type of glass it is, but outside the window is aluminium
> mesh with 50 to 70mm holes in it. I also don't have line of sight which is
> another problem, but I thought if it does have 1200 metre range, it might go
> the ~600 to 650 metres I need to go. There is a two storey building and
> trees between them. I didn't what to put a mast up because gremlins get up
> on the roof and I don't think it would last long.
>
>
>
> "Sheldon T. Hall" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > On Tue, 02 Sep 2003 18:30:30 GMT, "John Eckart" <(E-Mail Removed)>
> > wrote:
> >
> > >None. Radio waves pass through glass the same as light waves do.
> > >
> > >"Tony" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > >> How much signal strength do you loose by putting an outdoor antenna for
> > >> wireless networking behind a glass window, for instance a particular
> > >> wireless access point is advertising as having a range of 150 metres
> indoors
> > >> and up to 1200 metres outdoors.
> >
> > Unless it's "Hi-E" glass, which seems to reflect more WiFi than it
> > passes....
> >
> > -Shel
>
>