Difference between revisions of "Net Power"

Revision as of 13:40, 13 June 2008

Net Power defined as Forward Power minus the Reflected Power This document describes how you should calculate the Net Power correctly.

**Given information**
Frequency (MHz)	Forward Power (dBm)	Reflected Power (dBm)
201,973	50	30

Question: What is the Net Power?

Answer: 49,95635195 dBm

First you calculate the dBm values to linear values.

$50\ dBm=10^{\frac {50}{10}}\ mW=100\ W$

$30\ dBm=10^{\frac {30}{10}}\ mW=1\ W$

Subtract the linear values

$Net\ Power=Fw-Rf=100-1=99\ W$

Convert the value to dBm again:

$10*log10(99*1000)\approx 49,95635195\ dBm$

Revision as of 13:40, 13 June 2008 (view source) Jewe (talk \| contribs) ← Older edit		Revision as of 13:40, 13 June 2008 (view source) Jewe (talk \| contribs) Newer edit →
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	<math> 50 \ dBm = 10^{\frac{50}{10}} \ mW = 100\ W</math>		<math> 50 \ dBm = 10^{\frac{50}{10}} \ mW = 100\ W</math>
		+
	<math> 30 \ dBm = 10^{\frac{30}{10}} \ mW = 1\ W</math>		<math> 30 \ dBm = 10^{\frac{30}{10}} \ mW = 1\ W</math>