Need help for ADS S-parameter simulation

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jeffreycheng

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calculating q from y-parameters

I have got the S-parameters of a Sprial inductor. How can I get the inductor's Q and value in ADS? Thank you.
 

converting y-matrix to s-matrix ads

You can convert it to Y-parameters and then, you can calculate L=(1/2*pi*f)*imaginary(1/Y11) for an inductor with port 2 grounded, else it will be 1/Y12 instead of Y11 if you need the inductance from terminal 1 to 2.

svarun
 

calculate inductance y-parameters

use S2P and set the file to your s2p file
and use S parameter simulation, check Y parameter
and then calculate the inductance and Q
according well konw equation
 

ads s-parameter simulation

Hello jeffreycheng,

It is very easy to calculate....
The Quality Factor (Q) based on single port
Q=mag( imag( Y11 ) / real( Y11 ) )

Use Sonnet Lite Free version to import the spiral S parameters then plot the Q....
I attached a simple example...


---manju--
 

ads s-parameter simulation

Thank you all.
I suppose there are some tools or functions in ADS could turn the components' S-parameters to conponent value and Q.
 

Re: converting y-matrix to s-matrix ads

svarun said:
You can convert it to Y-parameters and then, you can calculate L=(1/2*pi*f)*imaginary(1/Y11) for an inductor with port 2 grounded, else it will be 1/Y12 instead of Y11 if you need the inductance from terminal 1 to 2.

svarun
Click to expand...

Thank for your advice. However, I have not known how to convert S-parameters to Y-parameters. Can you show more detail?
 

Re: converting y-matrix to s-matrix ads

hien.rfic said:
Thank for your advice. However, I have not known how to convert S-parameters to Y-parameters. Can you show more detail?
Click to expand...

In ADS? Just add this equation to your data display: Y=stoy(S)
 

Re: converting y-matrix to s-matrix ads

volker_muehlhaus said:
In ADS? Just add this equation to your data display: Y=stoy(S)
Click to expand...



Thank volker_meuhlhaus. My schematic for simulation is included in attachment. I followed some instructions, but result is wrong.



Can anyone help me? Thank so much.
 

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  • 12-10-11 9-55-38 PM.png
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I don't see a mistake (except that this is single ended L and Q, not differential).

Test your simulation by replacing the S2P file with an ADS inductor element. This is to make sure the problem is not in the s2p file.
 

volker_muehlhaus said:
I don't see a mistake (except that this is single ended L and Q, not differential).

Test your simulation by replacing the S2P file with an ADS inductor element. This is to make sure the problem is not in the s2p file.
Click to expand...
I draw a planar spiral inductor in HFSS, simulate and extract S-parameter into s2p file. After that I use ADS to calculate inductance of my inductor.
 

I understand what you do, and suggested a way to troubleshoot your equation with a known inductance value (circuit element).
 

volker_muehlhaus said:
I understand what you do, and suggested a way to troubleshoot your equation with a known inductance value (circuit element).
Click to expand...

I'm sorry. Because I'm in a hurry. I read your suggestion but I don't know what I should do. I worried that I cannot ask you too much and you don't have time to answer my foolish questions. I'm ever so sorry. I greatly appreciate your kindness.
 

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