Window film

If it is then let me know whose film it is. Got a few areas I'd like to use it in.

Likewise.

Almost certainly!!

Most of the window film that's used to reduce infrared radiation from sunlight into the room is a metallic coating on the transparent plastic layer.

So it has the property of screening the room, especially if the room has no other rf accessable transmission points!!!

For most signals the rf would penetrate the walls and any gaps around but it seems you have found the best stuff for use at 800 to 1200 MHz - well done!!

John.

Hi Electroman,

I covered my windows with a window film and the inside walls with Aluminium foil before I papered over them, the reason being is that a water tower within 34 yards of my home was covered in mobile phone antenna.

I am one of those people that has a huge problem with EMF's, espesially that which is produced by micro-waves. I bought the high quality window film from Germany when I was visiting there earlier this year, and it has helped me a great deal.

Spencer.

Thats real bright of you. Build all those "protections" in then sit in front of a computer running at microwave frequencies all day not to mention the x-rays produced bu the monitor. Yup, real bright...

I beleive he is attempting minimalization as opposed to elimination of mentioned.

Guest I sure see you all over this forum.

Hi Guest,

Just for your information my computer VD-unit has a screen that is constructed of LCD's, this does not give off x-ray's or any other form of harmfull radiation!!!!!!!!!!!!!!!

Spencer.

Most LCD monitors do not emit radiation as far as I am aware.......or have I missed something new?

Hello Andy Germany

If your Monitor does not emit radiation, in the visible light spectrum, then you cannot see it.

Kind Regards....

Well that certainly opened my eyes!!

Thanks.

Is it a metallic film? If it is, and it's making contact with the metal structure of the car, you've just built yourself a Faraday cage. Try a portable radio and see if it loses its signal also.

Car? The OP hasn't mentioned it was in a car.

Fitting window film in a car could well be dangerous.

I assumed it was a car since I just had a conversation with a friend who was getting metallic film added to his car windows. I wouldn't think that covering the windows in a house would have much effect - unless it's a metal house.

Or it could save lives by thwarting cell phone yakkers!

You might want to invest in one of those little external antennas cars used to use back in the 80's and 90's.

Hello Guest,

Do you live in a house with reflective foil (Sisalation type) incorporated behind the wall linings?

This is generally for heat retention inside, or in hot climates, the foil is placed facing the other way, to keep radiant heat outside.

The other alternative is your building is a reinforced concrete structure.

In both cases, using that metallised window film, you have made a Faraday Cage in which very little Radio Frequency radiation at certain frequencies may be passed in or out.

There is one other thought, in that because cellphone transmission is essentially line-of-sight, you may have covered the direct path to/from the nearest cellphone repeater.

Kind Regards....

Chiltern Railways, among other rail operators in the UK, designates some of its coaching stock as "quiet coaches". What they do is load the window panes up in these designated vehicles with a tiny proportion of gold, which makes them conductive. The gold-loaded windows, in connection with the metallic nature of the rest of the coach body, makes a "Faraday Cage" of the whole vehicle structure, preventing radio signals (which is what a cell/mobile phone connection is, after all) from entering the vehicle.

Bliss.

Is that a guide as to what might be happening?

I had a heavy roll-up window shade that would block the signals from my remote weather station ( around 433MHz). It was probably the titanium dioxide in the coating that did the blocking.