frequency domain S11 convertion to time domain TDR
You get the time domain TDR by taking the inverse transform of the frequency domain S11 data. This is related to the fact that the impulse response of a network is equal to the Fourier transform of its frequency response. Many Vector Network Analyzers have this function built in and usually labeled &quot;Transform&quot;. You can find the details by Googling &quot;convert S11 data to TDR&quot;. One good source is: https://cdn.rohde-schwarz.com/pws/dl_downloads/dl_application/application_notes/1ez44/1ez44_0e.pdf.