Author Topic: Shielding against C band interference  (Read 328 times)

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Offline 1alan1

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Shielding against C band interference
« on: May 19, 2020, 03:59:09 am »
We are having issues with 5G interference on a C - Band down link.  I moved the antenna around and found the direction with the highest level of interference. On the roof I see two sets of antennas within 200 yards in the same direction. Not sure they are both 5G but pretty sure one of them is. This problem popped up last year. The dishes are fiberglass and installed years ago. I suspect they are not designed to operate in this environment.
So I am looking into some ways to try to mitigate this interference. I have a couple of ideas and wanted to have someone give me their opinions and or ideas how to deal with this if possible. Another guy I work with it looking into filtering.
At the moment I am looking at possibly installing a grounded mesh next to a couple of our dishes. I am also considering if its possible to install a grounded mesh on the back and sides of the dishes. Or a combination of both. I am pretty sure I will not be able to block it completely, but if I could knock it down a ways might work.
Thanks!!
 

Online Ian.M

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Re: Shielding against C band interference
« Reply #1 on: May 19, 2020, 05:46:43 am »
https://www.fcc.gov/reports-research/guides/interference-complaints

While you are witing for the bureaucracy, you could try spraying the backs of the dishes with nickel EMI screening paint, then overcoat it when fully dry and cured with clear auto lacquer for weather protection.  Do a small test panel first to check the lacquer is compatible with the nickel paint - its thinners mustn't redissolve the paint as any extra resin between the nickel particles will drastically reduce its conductivity and thus screening effectiveness.  Don't get any nickel paint on the dish faces or LNBs.
« Last Edit: May 19, 2020, 05:50:26 am by Ian.M »
 

Offline 1alan1

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  • Country: us
Re: Shielding against C band interference
« Reply #2 on: May 19, 2020, 06:11:58 am »
Ian.M,
Interesting Idea. I never looked into any coatings. I will run this up through management and see what they say.
Thanks!!

Alan
 


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