What simple metal blocks out radio and or cellular signals?

Question

What simple metal blocks out radio and or cellular signals?

Answer 1

iron  and nickel, but they have to be made into a "faraday shield".

Answer 2

It's not a specific metal, but design of the shielding that's the concern. Any conducting material, especially when grounded to the antenna, will work like gangbusters. The material doesn't have to be metal - nor does it need to be solid - or have to be directly grounded - to work.

About 15 years ago, GM produced a car that was an excellent Faraday Cage - for ordinary RF, not just for lightening. However, customers were VERY unhappy. Radar detectors failed to see the radar signal. Cell phones didn't work except with an external antenna. Silverized windows disappeared from new models within months of the cars' introduction!

Google for "Faraday cage" - for example Wikipedia at http://en.wikipedia.org/wiki/Faraday_cag... .

I spent most my life wanting better amateur radio transmission - and here I am trying to help muffle the RF. Life does run in circles!

Good luck!

Answer 3

The term is faraday cage not faraday shield and most metals produce this effect if they surround a recieving or transmitting antenna.