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question about power analysis (Read 1670 times)

tulip

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question about power analysis
Dec 16^th, 2015, 6:33pm

In Razavi�s book <RF microelectronics>(second edition), it says � For a sinusoidal input voltage with an rms value of Vin, the power delivered to the input port is equal to Vin²/Re[Zin]�

My question is : if the input impedance of the port is Zin=A+jB, after some calculations, I get a different result, as shown in the attachment. I do not know which one is correct. Would you please read the attachment and see which one is correct.

Thank you very much.

power_analysis.pdf

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raja.cedt Senior Fellow Offline Posts: 1516 Germany	Re: question about power analysis Reply #1 - Dec 17^th, 2015, 6:50am That has been stated under the assumption of matched load or pure resistive load.
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tulip Community Member Offline Posts: 41	Re: question about power analysis Reply #2 - Dec 22^nd, 2015, 4:47am I see, thank you. raja.cedt wrote on Dec 17^th, 2015, 6:50am: That has been stated under the assumption of matched load or pure resistive load.
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