5.7/5.8 GHz 802.11n dual polarity MIMO through office building glass, 1.5 km distance

[streiner at cluebyfour.org (Justin M. Streiner)]

On Tue, 28 Dec 2010, Anonymous List User wrote:

> For architectural and building management reasons we cannot mount our
> antennas in a rooftop or outdoor location at either end.  The distance
> between two buildings is 1.5 km, and the fresnel zone is clear.  Antennas
> need to be located indoors at both ends and will be placed on small speaker
> stand tripod pointing at windows.  This has been done successfully before
> with 2.4 GHz 802.11g equipment and a link from an office in the Westin to a
> nearby apartment building, but I am unsure of what effect glass will have on
> 5 GHz.  Has anyone tried this?

A lot depends on the windows themselves.  Windows in some modern buildings 
have a thin metallic coating that can have a big impact on the ability to 
pass an RF signal.

jms