[SOLVED] Which discrete component modelling to use? (S-parameter or Spice)

[yjung]

Hello microwave experts!

I am trying to design an RF circuit using ADS on FR-4 substrate.
I will be using discrete components for matching and found out there are different modelling files to choose from.
Upon searching for vendors, I found that TDK provides the most detailed modelling files for their products (please suggest me other vendors if I am wrong).
As seen in the image, the vendor provides different types of modelling files.
Should I be using the S-parameter and insert it as 'data item' or should I be using the Spice file, or both?

I am trying to build a rectenna system operating at 2.45 GHz.

Thank you all!!

 

[volker@muehlhaus]

Discrete passive components for matching means L and C? They are linear, so using S-parameters is perfectly fine.

I like the Murata component models for ADS: Murata provide a complete library with electrical models & footprints for layout.

 

[pancho_hideboo]

Should I be using the S-parameter and insert it as 'data item' or should I be using the Spice file, or both?

If you do Transient Analysis or Nonlinear-Frequency-Domain Analysis, use RLC-Model(Spice Model).
If you do Linear Small Signal Analysis, use S-Parameter box.

 

[BigBoss]

S-Parameters based simulation models may sometimes create trouble due to their natural discrete structures.If the analysis is linear(AC,S-Parameters) no problem but they may have issues with transient analysis even with HB analysis.Using equivalent circuit that consists of RLCk elements, may be better in some cases.

 

[yjung]

Thank you all! I've ended up downloading Murata library, which solved things easily.
Anyways, I did play around with both S-parameter and the equiv circ.
They both give similar output, just slightly different.