oldr_n_wsr wrote:... I went to the antenna engineers. One guy is even a Former Marine, so he was familiar with the predator drone capabilities; it was his opinion that foil would not block the chip well. He believed that at best the signal would be slightly scattered, but not eliminated. That would be enough to locate Bourne, to within visual range.
Anything implanted in the body would be very low power and the signal
could be blocked although admittedly, not totally cancelled especially if he only wrapped the tin foil around the body part. Leakage will occur in any part not wrapped by the foil. Better to go into a "box container".
To test that theory, as best I knew how- I tried to block my cellphone's reception with a 'space blanket' made of aluminum. It was completely covered on all sides, in two layers, and then I asked the Roomie's daughter to call me.
There was no delay...
~RING~
The blanket is probably not totally "connected", that is there are gaps from one conductor to another. The way to tell is to get a VOM and measure the resistance from one side of the blanket to the other three sides. Low ohms means it's connected, high ohms (or infinite ohms) means it will not make a good Faraday cage.
I thought that 'space blankets' were reflective mylar. A non-conductor. When then had Al vapor-deposited on it. While higher voltages might be conducted (briefly, until the substrate melted) I doubt if lower voltages would be conducted very well since the aluminum fractures when it is flexed. One of the problems in making flexible displays is that most of the materials used for conductive layers fracture like that.
And there are other issues. First Faraday cages are not equally effective against all frequencies adn second if the cellphone's antenna was in contact with the Al layer then it would just act like an antenna.
Ok, so I just did the experiment.
First, I wrapped my cellphone in a paper towel (insulator) and then wrapped it in Al foil and called the number from the landline.
<<nothing>>
Then I took the foil off and tried again.
<<Immediately it rang!>>
Proving that an al-foil Faraday* cage works perfectly!
yrs,
rubato
* no matter what his first name might have been.