S11parameter conversion from time domain into frequency domain.

[Shahin Alam]

Hello guys, good morning to everyone. So to say, I am a beginner in antenna design and digital signal processing using CST and MATLAB. I am unable to do IFT of S11 parameter. How can I convert S11 parameter(CST) using CST from the time domain into frequency domain for further processing using CST or MATLAB?

Advanced thanks to all......

 

[FvM]

scattering parameters are always frequency domain parameters. In so far "convert S11 parameter... from the time domain into frequency domain" makes no sense. Calculating a simulated TDR response from S11 measurement by means of IFT (= converting from frequency domain to time domain) is possible and provided by advanced VNA instruments.

 

[volker@muehlhaus]

EM solvers like CST working in time domain do that FFT internally. Internal calculation is time domain, but resulting S-parameters are already the converted frequency domain results.