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I want to show my students how to block the signal coming from a wireless router.

  1. Sep 1, 2009 #1
    i am new , so i am not sure if this is the rite place.
    my Question
    i want to show my students how to block

    the signal coming from a wireless

    router. Pl help!?
    i have tried wrapping the antenna with

    aluminium foil and putting the whole

    modem in an aluminium container, none of

    which works. thanks.
    when i put my mobile phone in the

    aluminium container , it successfully

    block the mobile phone signal. why

    doesnt it block the signal from my

    modem???
     
  2. jcsd
  3. Sep 1, 2009 #2
    Re: i want to show my students how to block the signal coming from a wireless rou

    Your Faraday cage might not be working for several reasons.

    One reason might be that there are holes or that the antenna is touching the cage.

    Another reason might be just that the material you are using is not thick enough. A wifi router probably puts out a stronger signal than a cell phone. Try using thicker and/or denser metal.
     
  4. Sep 1, 2009 #3

    mgb_phys

    User Avatar
    Science Advisor
    Homework Helper

    Re: i want to show my students how to block the signal coming from a wireless rou

    When you put the router in the al box I assume you had the power and network cable going in? The signal can leak out through the same holes, it can even re-radiate along those wires.

    For high frequency RF, especially in a system which is designed to be sensitive to low level signals you need to make it pretty much airtight.
     
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