Wi-Fi signal Suppressor

Unanswered Question
Feb 13th, 2008
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Do we have an equipment that can block unwanted Wi-Fi radio signals so that the expected Wireless signals within a room or laboratory in this case will the be the only radio signal that will contain this room. Any other unwanted Wi-Fi radio signal will be blocked by that equipment from entering the lab/room?


Thanks,

Tabs

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ericgarnel Wed, 02/13/2008 - 06:17
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line the outside of the room with tin foil ; -)


Seriously, there are several products that are available to block rf such as panashield

http://www.panashield.com/emc_absorbers.asp


We have rf blocking in our permanent and temporary walls, originally for wireless mics, but work great (sometimes too great) on wifi freq as well.

On the WCS heatmaps, you can literally see where the signal gets dampened.

rocknolds Wed, 02/13/2008 - 08:37
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Thanks eric, I am looking into the website you mentioned.

scottmac Wed, 02/13/2008 - 08:26
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Your other option (aside from shielding - thanks for the link Eric!)is clever use of antennas and placement for your equipment.


It doesn't eliminate the intruding signals, but, done properly, it can make your intended signals be the "best" signals.


Whether or not you can do it with antennas also depends on your application and mobile equipment, but it might b something worth checking out.


Sector antennas are more sensitive within the smaller or more specific region. you can get them to cover ~180 degrees, down to a very thin slice of the circumference.


If you can provide more details, perhaps we can offer more specific suggentions.


Good Luck


Scott


rocknolds Wed, 02/13/2008 - 08:39
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Our company is planning to have a laboratory/room for Wi-Fi tests. We want to have a controlled environment in which unwanted radio signals from outside the laboratory is refused from entering the test premise room. Inside, we will be employing 2.4GHz Wi-Fi routers/access points with b/g/n standard ratings and test our wireless products for our pre Wi-Fi certification.


Thanks,

Tabs

scottmac Wed, 02/13/2008 - 12:23
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Shielding is probably your best bet then.


It won't be "real life," but it will give you an accurate radiation map.


For whatever it's worth, you don't need a solid shielding (like metal foil), you just need a conductive mesh to act like a "Faraday Cage." Foil is a safe bet (like the stuff in the link), but even something like a 1/4" hardware cloth (properly grounded) would be OK.


Good Luck, sounds like a fun project!


Scott



rocknolds Wed, 02/13/2008 - 20:55
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Thanks Scot.


If you do not mind, could you send me specifics on what things to buy and the approximate cost? the room would be a normal laboratory room...


or where could I inquire about buying things needed for this?


Very much appreciated...

Tabs

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