Do magnets interfere with RF?

Discuss commercial and home made antennas.
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rujoesmith
Posts: 1
Joined: Wed May 11, 2016 3:49 pm

Do magnets interfere with RF?

Post by rujoesmith » Wed May 11, 2016 4:01 pm

Hi, im very new to sdr and radio in general. I just picked up a RTL2832U and am trying to build my first antenna. I heard the dual planar antenna is a good starting point and am trying to build something similar to this: http://www.wa5vjb.com/references/PlanarDiskAntennas.pdf

I am trying to make one that is a bit more portable and can fold in half when not in use. I thought of attaching two small magnets to the center wire of the coax cable so that as it folds it can connect/disconnect from the top plate. So my main question is, will those magnets interfere with the radio waves at all? and does this sound feasible?

Thanks!

Kenn
Posts: 51
Joined: Fri Apr 08, 2016 8:43 pm

Re: Do magnets interfere with RF?

Post by Kenn » Wed May 11, 2016 6:40 pm

I would say no, consider that many antennas for mobile use are secured to the vehicle via a very powerful magnet. You could confirm this by doing an experiment checking reception and signal strength with vs without magnets.

--Kenn

rtlsdrblog
Site Admin
Posts: 2323
Joined: Mon Nov 19, 2012 11:54 pm

Re: Do magnets interfere with RF?

Post by rtlsdrblog » Sun May 15, 2016 5:50 am

No magnets won't affect RF signals, so your idea should work fine.

AD5NL
Posts: 34
Joined: Fri Sep 16, 2016 7:00 pm

Re: Do magnets interfere with RF?

Post by AD5NL » Fri Sep 16, 2016 7:08 pm

The only way I can think of that a magnet would create an EM field would be if they were moving. You know, like an electrical generator.

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