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RF Design Solutions

RF Design Solutions

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Conversion of Differential Signal to Single Ended Signal

Atif Hussain Shah

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Will 1:1 Balun give a 3dB gain at output when the input is a differential signal?
The differential impedance is 50 ohm and single ended impedance is also 50ohm
 

BigBoss

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BalUns don't provide Gain, instead they have losses..
 

FvM

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How do you derive this? RF signals are usually measured as power, e.g. in dBm. A lossless balun can have at best output power equal input power. In case of 1:1 balun, this corresponds to equal in- and output voltage.
 

Atif Hussain Shah

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How do you derive this? RF signals are usually measured as power, e.g. in dBm. A lossless balun can have at best output power equal input power. In case of 1:1 balun, this corresponds to equal in- and output voltage.
Yes in case of 1:1 balun the output power will be equal to input power
But in case of 1:2 balun what will be the output power.
Basically i want to ask/confirm that as Balun has conversion loss and for 1:2 balun the conversion loss will be 3dB less than for 1:1 Balun
 

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