Sparam Inductor with HspiceRF

Status
Not open for further replies.
R

Reas

Newbie level 5
Joined
Apr 2, 2012
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,337
Hi,
I'm using HspiceRF to simulate an LNA.
The model of Inductors are an Sparam so I use TSTONEFILE=data.s2p.
In the simulation, I get the following warning for different frequencies: "S parameters are not passive at (value of freq) Hz. Will be regarded as noiseless.
 

Reas said:
In the simulation, I get the following warning for different frequencies:
"S parameters are not passive at (value of freq) Hz.
Will be regarded as noiseless.
Click to expand...
No.
If s2p is passive, |s11|**2+|s21|**2<=1.0 and |s12|**2+|s22|**2<=1.0 have to be satisfied.

How do you get S-parameter for inductor ?
And what analysis do you use ?
 

Attachments

  • 160530-225154.png
    100.3 KB · Views: 51
Last edited:
Reactions: Reas

    R

    Reas

    Points: 2
    Helpful Answer Positive Rating
I get it from an EM simulation (*.snp: magnitude and phase vs. frequency for s parameters and *.sri: real and imaginary part vs. frequency for s parameters) so I use the snp file as s2p for TSTONEFILE.
Example of simulation in .snp file:[1e9 0.0267 1.408 0.982 -0.105 0.982 -0.105 0.026 1.40]
 

.ac dec 50 1g 3G
.LIN noisecalc=1 sparcalc=1
.print AC S11(DB) S22(DB) S12(DB) S21(DB) NF

I use this to simulate LNA
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…