How can you amplify a signal but not attenuate it?

All things pertaining to wireless and RF links

Moderator: phalanx

Post Reply
SFE
Posts: 4
Joined: Thu Oct 18, 2018 5:50 pm

How can you amplify a signal but not attenuate it?

Post by SFE » Sat Nov 03, 2018 3:52 pm

Just wondering why is it you can amplify a signal with something like a repeater but not attenuate it wirelessly as well? Wouldn;t the same mechanics apply?

jremington
Support Volunteer
Posts: 2303
Joined: Fri Jun 15, 2007 9:41 pm
Location: Eugene, Or

Re: How can you amplify a signal but not attenuate it?

Post by jremington » Sat Nov 03, 2018 6:37 pm

Why do you think you can't attenuate a signal?

SFE
Posts: 4
Joined: Thu Oct 18, 2018 5:50 pm

Re: How can you amplify a signal but not attenuate it?

Post by SFE » Wed Nov 07, 2018 10:25 am

I've heard of repeaters and devices that amplify but not ones that attenuate wirelessly I mean, not at the source. It is possible? I'm thinking of devices that claim to reduce EMF-why they claim they work, but in fact do nothing.

jremington
Support Volunteer
Posts: 2303
Joined: Fri Jun 15, 2007 9:41 pm
Location: Eugene, Or

Re: How can you amplify a signal but not attenuate it?

Post by jremington » Wed Nov 07, 2018 1:21 pm

Look up "Faraday cage", which can reduce EM radiation to as close to zero as you like.

SFE
Posts: 4
Joined: Thu Oct 18, 2018 5:50 pm

Re: How can you amplify a signal but not attenuate it?

Post by SFE » Wed Nov 07, 2018 3:14 pm

I understand shielding but I'm talking about devices that amplify but not attenuate a signal wirelessly.

Post Reply