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Thread: ELF extremely low frequency

  1. #1 ELF extremely low frequency 
    New Member
    Join Date
    Dec 2010
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    1
    Hi Guys,

    As you know high frequency microwaves are subject to rain fade and atmospheric attenuation.

    When it comes to extremely low frequencies (3 to 300Hz), even a Faraday cage is unable to block it. Is there any material or phenomea which attenuates, absorbs or reflects these signals. For example, rainfade for high freq. microwaves and an analogical phenomena for extremely low frequencies.

    Kind Regards.


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  3. #2  
    Time Lord
    Join Date
    Mar 2007
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    What I've heard is that you just need a really big antenna. Like,,, really really big, or an array of them.


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  4. #3 Re: ELF extremely low frequency 
    . DrRocket's Avatar
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    Quote Originally Posted by Ozgur
    Hi Guys,

    As you know high frequency microwaves are subject to rain fade and atmospheric attenuation.

    When it comes to extremely low frequencies (3 to 300Hz), even a Faraday cage is unable to block it. Is there any material or phenomea which attenuates, absorbs or reflects these signals. For example, rainfade for high freq. microwaves and an analogical phenomena for extremely low frequencies.

    Kind Regards.
    A superconductor ought to work. What you need is a skindepth of zero.

    http://en.wikipedia.org/wiki/Skin_effect
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