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The noise figure of a low phase noise amplifier.

Why is that the HMC606 has a ultra low phase noise(-160dBc/Hz@10kHz), however, it has a noise figure of 5?

What's the relationship between noise figure and phase noise?

What's the difference between low phase noise amplifier and low noise amplifier?

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  • Hi Tianyuan Xie,

    Yes, your understanding is correct. We do not have phase noise data for HMC564, but I would expect HMC606 to have a better phase noise performance than HMC564, even though the poor NF compared to HMC564.

    As a side note, amplifier`s phase noise performance, both close in and far out, can be different under large signal and small signal. The AM noise component of PN can also be different under large and small signal RF drive. PN alone is whole big discussion. Depending on the application requirements, it would be best to test and see.

    Best,

    Kagan

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  • Hi Tianyuan Xie,

    Yes, your understanding is correct. We do not have phase noise data for HMC564, but I would expect HMC606 to have a better phase noise performance than HMC564, even though the poor NF compared to HMC564.

    As a side note, amplifier`s phase noise performance, both close in and far out, can be different under large signal and small signal. The AM noise component of PN can also be different under large and small signal RF drive. PN alone is whole big discussion. Depending on the application requirements, it would be best to test and see.

    Best,

    Kagan

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