how to measure the out psd by spectreRF?

[lily1981216]

how to measure psd

Hi,I'm designing a pa.I want to know the out psd of it and the bandwidth is 3G-10G.Would you like to tell me how to do that by spectreRF? Thanks!

 

[BigBoss]

What is "psd" ??

 

[lily1981216]

It's Power spectral density

 

[BigBoss]

It's simply "Power Spectrum" of the circuit.thats' it..
You can obtain it easily by doing PSS in cadence or HB in ADS...

 

[lily1981216]

Power spectrum?I have done that.But the spectrum is discrete!If I want to see more power values ,should I decrease the beat frequency and increase hamonics numbers symultaneously?Thanks!

Added after 14 minutes:

I wanted to reply to your post the day before yesterday,but I couldn't submit the postreply for some bugs.

 

[BigBoss]

You should increase the harmonic numbers of the main carrier and modulation frequency in the simulation to see all mathematical combination in the spectrum.
Or,
You can make a envelope simulation to see linear representation of the spectrum but it will be less accurate..

 

[fuser1972]

Hello

I faced the same problem as lily's. Does that work? Can you please share me with your experience?

Thanks

 

[whlinfei]

Re: how to measure psd

Hi,I'm designing a pa.I want to know the out psd of it and the bandwidth is 3G-10G.Would you like to tell me how to do that by spectreRF? Thanks!

Hi,

I don't know if you know how to plot the PSD using cadence?
I have encountered the same problem. The plot I got from the function "psdbb" is very different from the plot in the manual, after envelope simulation.

Do you have any suggestion or manual that I could refer to ?

Thank you in advance.

Best Regards,
whlinfei

 

[pancho_hideboo]

Re: how to measure psd

See The Designer's Guide Community Forum - PSD from envelope following analysis