Power Amplifier Interview Questions

Any answers for these ?

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What are the effects of High Load VSWR on a Power Amplifier. How to design to get rid of these effects ?

How does quiescent bias point affect ACPR ?

Explain why class C amplifier 'biases up' ?

Describe critical design techniques used to assure low ACPR in a linear PA ?
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What are the effects of High Load VSWR on a Power Amplifier. How to design to get rid of these effects ?
"this can damage the PA" , b using after the PA directional coupler , or a circulator

How does quiescent bias point affect ACPR ?
i think as u change the bais point the nonlinearity of the PA affect specially imtermodulation which will affect the ACPR performance

i don't know the others

khouly

Explain why class C amplifier 'biases up' ?

Normally an amplifier has to be bias beyond cuttoff for Class C operation. However, the RF waveform across the Base/emitter junction can generate the necessary bias for Class C operation.