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Guest Alexbb

LNA wideband matching

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Guest Alexbb

Hello! I'm beginners RF circuit designer. I have task to design integrated circuit LNA for 8-12Ghz on SiGe. Could you advice me methods for such broadband matching by mean of L and C.

Thanks for help.

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Guest Abhishekabs

Hi,

I want to make 1-3GHz broadband LNA using ATF54143.

but I am not getting good NF over this range.

I want atleat 0.4-0.5 over 1-3GHz bandwidth.

what should I do?

can anyone suggest me?

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Guest pks95411

Check the device for stability. I believe it may have the unstable in this range.

This cause you to have compensating circuit which might make the NF to move around 0.8dB.

Share the design then we will be able to help more.

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Guest Abhishekabs

Check the device for stability. I believe it may have the unstable in this range.

This cause you to have compensating circuit which might make the NF to move around 0.8dB.

Share the design then we will be able to help more.

Hi

Thanks for the reply

What is compensatory circuit you are talking about? :o:huh:

I will upload the circuit in 2-3 days. :rolleyes:

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Guest pks95411

What is compensatory circuit you are talking about? :o:huh:

When the device is unstable, it means gain is infinitive. Here the "compensatory circuit" means stabilization circuit.

I agree that I should have used the word stabilization instead compensatory

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