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Should I take into consideration LNA stability factor?

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infinite_gbps

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I am using an Avago LNA that according to the datasheet is unconditionally stable.

See link: Ultra Low Noise, High Linearity Active Bias Low Noise Amplifier

I have a test board and populated the components for low NF. If I am only interested in a specific band and the stability factor states that it may be potenctial unstable out of band. Should I be concerned?

Also, should I be concerned if it is unstable out of band as well?

Thank you.
 

young.microwave.eng

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Re: LNA Stability Factor

hi
for sure you should take care of loading if your LNA is potentially unstable.
plot stability circles in Gamma S and Gamma L plane and and also situate the termination in those planes.then analyze the stability

---------- Post added at 07:33 ---------- Previous post was at 07:31 ----------

hi
for sure you should take care of loading if your LNA is potentially unstable.
plot stability circles in Gamma S and Gamma L plane and and also situate the termination in those planes.then analyze the stability
see this link too.maybe it can help you:
https://www.edaboard.com/thread214213.html
 

tony_lth

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Re: LNA Stability Factor

Or you can use Mu and Mu_prime to analysis the stability factor.

Yes, the LNA should be stable at whole freq band, such as from 10KHz to 26.5GHz.
 

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