How do you block antenna radiation?

Answer 1

Radiation from an antenna can be blocked by using a simple sheet of conducting material. Aluminum foil would work. But you'd have to set things up so whatever it is you are shielding is completely in the electromagnetic shadow of the antenna. Metal screen would work, too, but you'd have to make some calculations as regards the frequency of the radiation you wish to block and the size of the openings in the screen. You can see the items in your microwave heating up, but the radiation can't get out. Same principle.