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Simulators >> RF Simulators >> Concerning the Noise Figure as measured in a HB analysis in SpectreRF.
https://designers-guide.org/forum/YaBB.pl?num=1619021353

Message started by StevenH on Apr 21^st, 2021, 9:09am

Title: Concerning the Noise Figure as measured in a HB analysis in SpectreRF.
Post by StevenH on Apr 21^st, 2021, 9:09am

Greetings members,

I have a question concerning the Noise Figure computed by SpectreRF in a HBnoise analysis.

For the Noise Figure (NF), there is an option called "Integrated Over Bandwidth" in the form bellow (After I ran an HBnoise analysis on an LNA).

We know that

NF = 10log( Noise Factor ) ......(1)

And, per my understanding, SpectreRF computes the Noise Factor as

Noise Factor = (Noise Power Spectrum at output port - Noise Power Spectrum generated by resistance of output port) / (Noise Power Spectrum at output port due to input port resistance specified over an input frequency range) ......(2)

So my question is, does the "Integrated Over Bandwidth" option integrate the numerator and denominator of (2) over the output frequency range and then apply (1)? Or is it the average value of (1) over the output frequency range?

The documentation wasn't much of a help, it says,

"If the noise figure over a bandwidth is desired, select Integrated Over Bandwidth, and specify the frequency range you desire for the measurement."

Any input would be more than welcome!

Title: Re: Concerning the Noise Figure as measured in a HB analysis in SpectreRF.
Post by StevenH on Apr 24^th, 2021, 12:14pm

Anyone please? I could really use some guidance. (This is for a project in my college).