I need to build a Faraday cage, It must not let any RF or Electormagnatice Radiation (EMR) in or out. Can anybody provide me with the technical detail and where to get the material?
Any help will be appreciated!
2006-10-27 21:30:54 · 0 answers · asked by ali morad 2 in Science & Mathematics ➔ Physics
Any metallic screen (the kind used to make window screen) would work, but it HAS to be metallic. Just build a box, and cover the outside if overlapping screen mesh (so as to leave no gaps that is not covered by mesh) and you've done it.
To test it, simply put a cell phone in it: if it does not get a signal, then it is working as you want it. If not, you may have picked a mesh that is too wide, but judging from the Mythbusters episode when they build a Faraday cage, a regular fine mesh worked OK.
2006-10-27 21:35:59 · answer #1 · answered by Vincent G 7 · 1⤊ 0⤋
Faraday cages can be used to block out electromagnetic radiation which come in the form of waves. The lower the frequency the larger the grid, the higher the frequency the smaller the grid. Light waves could theoretically be blocked, but their frequency is so high that you'd have to use an impossibly small mesh. Gamma ray frequency is much higher. Faraday cages are really only good for very low frequency waves such as radio. Even microwaves are too high for practical usage of a a Faraday cage. Additional info: Alien Steve is correct ... I wasn't thinking of solid metal as being a Faraday cage. His answer is on the money (he gets my vote).
2016-03-22 19:59:56 · answer #2 · answered by Anonymous · 0⤊ 0⤋
A Faraday cage or Faraday shield is an enclosure formed by conducting material, or by a mesh of such material. Such an enclosure blocks out external static electrical fields. Faraday cages are named after physicist Michael Faraday, who built one in 1836 and explained its operation.
The electrical charges in the enclosing conductor repel each other and will therefore always reside on the outside surface of the cage. Any external electrical field will cause the charges to rearrange so as to completely cancel the field's effects in the cage's interior. This effect is used for example to protect electronic equipment from lightning strikes and other electrostatic discharges.
To a large degree, Faraday cages also shield the interior from external electromagnetic radiation if the conductor is thick enough and its meshes, if present, are significantly smaller than the radiation's wavelength. This application of Faraday cages is explained under electromagnetic shielding.
click here first:http://en.wikipedia.org/wiki/Faraday_cage#History
2006-10-27 21:33:56 · answer #3 · answered by Anonymous · 0⤊ 1⤋
The only way to block ALL RF is to make the cage of solid conducting metal like copper, and to make sure you have really good connections at all the joints. Solder or weld all but the door, make sure the door overlaps the cage and makes good electrical contact over its whole perimeter. A screen will pass RF whose wavelength is smaller than the screen openings.
Some hardware stores carry the relevant materials. A contractor's supply store is more likely. Any metal fabrication shop will have access to the materials. If you're doing this for an educational project like a science fair, a small metal shop may have people nice enough to help you.
2006-10-28 15:30:20 · answer #4 · answered by Frank N 7 · 1⤊ 0⤋
A cube covered with any kind of metal on all 6 sides will work. Aluminum foil will even work. Window screen is pretty cool because you can put a cell phone or radio in it and see the signal go away instantly.
2006-10-28 02:13:39 · answer #5 · answered by Nick G 2 · 0⤊ 0⤋
you can use any cage made of metals when you put an object into this cage it will pevent any RF or EMR from affecting the object
2006-10-28 00:14:14 · answer #6 · answered by James Chan 4 · 0⤊ 2⤋