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From: legg <legg@nospam.magma.ca>
Newsgroups: sci.electronics.design
Subject: Re: Mirror as ground plane
Date: Wed, 27 Nov 2024 11:31:59 -0500
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On Wed, 27 Nov 2024 14:24:20 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>legg <legg@nospam.magma.ca> wrote:
>> 
>> Anyone had experience using metalization on glass (mirror) 
>> as a ground plane or shield?
>> 
>> Any data on conductivity etc?
>> 
>> RL
>> 
>
>The best quality second-surface mirrors are coated with silver, followed by
>copper plating and a coat of paint.  Those should be pretty good if you can
>get wires on them. 
>
>Poorer ones have aluminum coatings around 2-3 nm thick and no plating.  
>
>Cheers 
>
>Phil Hobbs 

I think pressure contact will be good enough, so long as its renewed 
regularly, maybe with a conductive grit.

Will have to treat the isolated glass surface with something to 
reduce static, or stuff will start flying away at inconvenient 
times.

RL