How to create a rf filter, from which I have the s-parameters file?

Hi, I am learning to use the matlab tools RF Toolbox and RF Blockset, and I was wondering, is there any possibility to create a radiofrequency filter given a certain s-parameters file with RF budget or any other way, Instead of writing central frequency, BW, etc...

Answer 1

[Manish]

Hi Ana,

I understand that you want to know if it is possible to create a RF filter given a certain S-parameters file. You can achieve this with the help of the 'rfckt.passive' function, which will act as an RF filter when S-parameters are provided as an argument.

I tried it on my end, and it seems to be working fine.

Here is the sample code:

s = microstripLine;
S = sparameters(s,linspace(1e9,3e9,50),'Behavioral',true);
rd = rfdata.network('Type','S','Freq',S.Frequencies,'Data',S.Parameters);% if needed load s-parameters from file
rf = rfckt.passive('NetworkData',rd);

Points to remember:

1. Network data has to be passed to rfckt.passive function.
2. Only passive circuits can be passed, so make sure to run behavioral model analysis instead of method of moments.
3. When you import S-parameters and create an 'rfckt.passive' object in MATLAB using those S-parameters as network data, you are effectively modeling an RF filter based on the characteristics described by the S-parameters.

Refer the below links for better understanding:

• https://www.mathworks.com/help/rf/ref/rfckt.rfckt.passive.html
• https://www.mathworks.com/help/rf/ref/rfckt.rfdata.network.html
• https://www.mathworks.com/help/rfpcb/gs/behavioral-models.html

Hope it helps!