energy approved windows and RF

[gregz]

Do these coated windows reflect RF or attenuate. My guess yes. Im thinking
in terms of wifi.

Greg

 

[Sjouke Burry]

Do these coated windows reflect RF or attenuate. My guess yes. Im thinking
in terms of wifi.

Greg

Reflection. Which is bad for phone/radio/wifi.

 

[Wimpie]

El 05-08-11 22:11, Dave Platt escribió:

My experience says "Yes".

I used to have a WiFi access point in my garage, with a somewhat-
directional antenna aimed in the direction of the back of the house
(with the beam travelling out through the garage walls, and then
into the house through the walls again). I could usually get an
acceptable signal in the rear bedrooms.

We had our old windows replaced with new double-pane "low-E" windows,
having a thin metal film coating on the glass to inhibit IR
transmission.

Poof... the signal was now substantially weaker, tending towards
unusable, many of the same spots it been OK before. Two of the newly
upgraded windows were in the line-of-sight paths between the access
point and the new "dead zones".

I had to move the access point into the den.

Hello Dave,

My experience also says "yes". Attenuation (whether or not caused by
adsorption or reflection), goes at least from VHF to UHF.

There is more: some fibre insulation has a metallic top layer. When
they install it well, the use metal tape for sealing. Result: bad
coverage of cell phone networks, bad reception of DVBT, analog radio,
etc. Just opening one window, changes the situation.



Wim
PA3DJS
www.tetech.nl
Please remove abc first in case of PM

 

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Do these coated windows reflect RF or attenuate. My guess yes. Im thinking
in terms of wifi.

These can be quite problematic.

One thing to try is some passive antenna systems.
Install an outdoor antenna outside the house (preferably at the top of
the top of the building). Use a low loss (at 2.4 GHz) coaxial cable
to bring the signal into the room where it is needed. Use a
omnidirectional antenna to re-radiate the signal to the handset in the
room (preferably not more than 1-2 m from the re-radiation antenna).

Passive antenna systems are usually OK anywhere in the world. Anything
requiring active RF amplification are typically under the control of
local telecommunication authorities (except WLAN frequencies).

Using outdoor WiFi access points, Ethernet cables through the wall
into a building and another WiFi AP inside the building might also be
OK.