Any way to shield microwave radiation?

Hossenfeffer

Diamond Member
Jul 16, 2000
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Ok, just moved my desk, computer, etc into a main floor bedroom (out of the basement, baby! ;) ) and, due to space and logistics, the microwave oven is on the other side of the plaster wall.

While I may end up moving the whole desk to another part of the room (if not really wacko and move it to another room), I thought I'd explore the possibility of a reasonably inexpensive "shield" that would keep that there radiation on the other side of the wall where it belongs ;)

Any thoughts?

edit: Just realized that I didn't mention that the picture on the monitor "wiggles" if the microwave is on. My gut tells me that's bad juju.
 

Antoneo

Diamond Member
May 25, 2001
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Place aluminum foil directly behind the microwave (or put aluminum foil on the wall facing the back of the monitor). That should stop it.
 

RGN

Diamond Member
Feb 24, 2000
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You could wrap everything in aluminum foil. Make sure you cut out eye holes though.
 

timelapse

Senior member
Nov 7, 1999
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simple... you need to put a conductor somewhere in between your microwave oven and computer stuff :)

The skin depth of conductors at microwaves frequencies is very small (milimiters) so any good conducting plate of any kind will be good :)

I learned that this year :)
 

Hossenfeffer

Diamond Member
Jul 16, 2000
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I'll start an Aluminum Foil tent immediately. I can see it now... I'll be the envy of everyone on the block... I'll charge admission for time in my Foil Tent. Fantastic! ;)

Thanks
 

jaydee

Diamond Member
May 6, 2000
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If microwave radiation is like UV (sunlight), than aluminum won't stop it. Pb and H2O will.
 

Mungla

Senior member
Dec 23, 2000
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Al should stop most of the RF being emitted. If I remember correctly, microwaves emit a signal at ~2-3Ghz. At that high of a frequency, your plaster wall is blocking most of the RF that is interfering with your monitor. I would try coating the back of the microwave with aluminum foil and see what happens. If that doesn't work, its not like it cost you a lot to try!
 

Antoneo

Diamond Member
May 25, 2001
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<< If microwave radiation is like UV (sunlight), than aluminum won't stop it. Pb and H2O will. >>


Microwave radiation is more like radio waves (microwaves have a slightly higher frequency) than UV. Aluminum foil will be enough to stop it.
 

Mday

Lifer
Oct 14, 1999
18,647
1
81
well 2 things

the microwave radiation may be interfering with the electron gun
the microwave may be in the same circuit as the monitor\computer

both will lead to problems.
 

TonyG

Platinum Member
Feb 12, 2000
2,021
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81
I had a similiar problem with my old TV which was right next to my monitor. Everytime I turned on the TV the picture on the monitor would wiggle just a bit, though I would get used to it after a while, and would stop when I turned off the TV.
I don't have that problem anymore with the new TV I got for christmas.
 

sharkeeper

Lifer
Jan 13, 2001
10,886
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Magnetron oscillation frequencies are in the neighborhood of 2450 MHz. That is not interfering with your monitor. The interference you are seeing is caused by the transformer in your microwave oven. This frequency range is ELF (extrememly low frequency) and is hard to shield. The best defense is distance. MU metal may work, but is very expensive and tricky to install and ground.

There is no hazard of 2450 MHz energy from a working radarrange in good condition. Even with the door switch disabled and the door open, very little harmful radiation ventures far out of the cavity.

Cheers!
 

Peetoeng

Golden Member
Dec 21, 2000
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The source of interference can be:

1) RF noise from the microwave circuitry that transmit thru the electrical conduit (since both devices share a wall, they are apprarently very close to each other. If this is the case, find farther electric plug or try use one of those power bar with RF filter.

2) Escaping microwave radiation. If aluminum foil doesn't help, buy an aluminum plate; a perforated plate would work. The wavelength of microwave radiation is pretty long, so it won't even escape from 0.1" holes. If you are paranoid, build a faraday cage around it with perforated plates (so heat and vapor can escape) and use hinges on the front plane so you can swing it open to access the microwave. Put a bowl of water inside the cage (on top of the microwave) to absorb the trapped radiation.