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Author Topic: Grounding high frequencies  (Read 1018 times)

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Offline testtube44Topic starter

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Grounding high frequencies
« on: July 10, 2018, 05:14:32 pm »
I just learned that grounding antennas doesn't actually stop EMF. So how can one ground a high frequency signal without creating EMF?
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Offline Karlo_Moharic

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Re: Grounding high frequencies
« Reply #1 on: July 10, 2018, 07:09:35 pm »
Could you define what acronym EMF stands for in this case?
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Offline testtube44Topic starter

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Re: Grounding high frequencies
« Reply #2 on: July 11, 2018, 03:05:56 am »
Electromagnetic fields. I'm trying to ground some high AC noise. I'm afraid my grounding line will turn into an antenna.
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Offline vk6zgo

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Re: Grounding high frequencies
« Reply #3 on: July 11, 2018, 03:28:24 am »
Quote from: testtube44 on July 11, 2018, 03:05:56 am
Electromagnetic fields. I'm trying to ground some high AC noise. I'm afraid my grounding line will turn into an antenna.
Rule of HF circuits: - Short connections .
If the length of the connection is very much shorter than the wavelength of the undesired frequency it will not radiate (or receive) to any significant extent.
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Offline TheUnnamedNewbie

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Re: Grounding high frequencies
« Reply #4 on: July 11, 2018, 03:24:23 pm »
I think you should be more clear as to what it is you are trying to achieve. The entire point of an antenna is to generate electromagnetic fields which can then form waves and propagate.
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Offline testtube44Topic starter

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Re: Grounding high frequencies
« Reply #5 on: July 15, 2018, 03:23:40 am »
I'm trying to plan ahead for my new ethernet connection (shielded), and I'm not sure if it needs to be grounded or not. The foil shield may be enough without the ground, am I wrong?
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