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SNR vs SWR - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


MR.D.
Post subject: SNR vs SWR Posted: Wed Nov 30, 2005 8:44 am

Lieutenant

Joined: Wed Nov 30, 2005 8:22 am
Posts: 2
Hello!!

can you help me???

I find some information and/or reference about the relation SNR vs SWR in TX system.

tanks for the help!!


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IR
Post subject: Posted: Tue Dec 20, 2005 1:12 am

Site Admin


Joined: Mon Jun 27, 2005 2:02 pm
Posts: 373
Location: Germany
Hello Mr.D;

Actually there is no real connection betweem SNR and SWR in Tx systems. Of course that the SWR should be good in order to avoid mismatches and power losses which can cost you in power consumption and siye. But there is a strong relation between these parameters in Rx systems. The best example is by doing the matching of an LNA to Gopt (Input matching) in order acheive the minimal NF. Also when matching is done between each stage to decrease the return loss to the minimum so that you will achieve a lower insertion loss and a better SNR.

Hope this helps!

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Best regards,

- IR



Posted  11/12/2012

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