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    Re: Faraday cage
    From: Jing C
    Date: 2017 Sep 09, 19:25 +0000
    My understanding of how a Faraday Cage works is that you need to completely surround an object in a continuous enclosure or mesh, which would probably make your dog unhappy and defeat the fence entirely. Of course you can just straight up shield an area with a thick layer to attenuate signal, but it wouldn't be a Faraday Cage.

    On Sat, Sep 9, 2017 at 11:52 Geoffrey Kolbe <NoReply_GeoffreyKolbe@fer3.com> wrote:

    Date: 2017 Sep 8, 21:51 -0700

    The suggestion of shielding a GPS in a Faraday cage comes up here frequently. So I would like to tap into the knowledge of our shielding experts.

    I have an electronic dog fence all around the property to prevent the dog from leaving it. (The kind that emits a radio signal for a receiver on the dog's collar). But I would like to leave a section open to enable the dog to pass through it. So I tried to shield 12 feet of wire with steel pipe and grounded it.That has absolutely NO effect. Zero. Why?.

    Herbert Prinz

    What is the range you have selected for activation of the dog collar? More than two metres? I have found that the selected effective range is usually conservative and actual effective range is more than this. You may need significantly more than 12 feet of pipe.

    Too, the pipe may not be as well earthed as you think, particularly for the low frequency radio waves involved.


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