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convert loss of power supply from dB to what

 
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thiseas
Antenna-Theory.com Newbie


Joined: 06 Nov 2012
Posts: 1
PostPosted: Tue Nov 06, 2012 1:54 pm    Post subject: convert loss of power supply from dB to what Reply with quote
trying to calculate the Pr(d) from friis, given the power of the base station in Watts and the loss of the power system in db, what should i do to work on watts?
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bigSteve
Antenna Wizard


Joined: 14 Mar 2009
Posts: 265
PostPosted: Thu Nov 08, 2012 4:09 am    Post subject: Decibels Conversion Reply with quote
If you haven't already, read this page:
http://www.antenna-theory.com/definitions/decibels.php

You can either convert Pr(d) from Watts to dB and then add/subtract them:
Pr(d) [dB] = 10*log10( Pr(d) )

Or you can convert your System Loss (SL [dB]) to linear and multiply them:

SL = 10^( SL[dB] / 10 )

It's not super complicated.
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