rdpdo2002
Member level 1
- Joined
- Oct 28, 2020
- Messages
- 34
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 6
- Activity points
- 108
Hello,
I got VSWR(S11) measurement from a molex flat cable 4 inches long and I want to obtain S11, so I do : S11 = (VSWR-1)/(VSWR+1) but the result I got is not consistent...
Molex cannot give me the S-parameters files so I want to extract data from graphs.
My aim is to obtain S11 and then use FFT to get TDR response on it so I can after get TDR of impedance along the line.
My experimental data are the one below :
I import the value to Matlab using a tool to extract the data :
and after extracting the magnitude from the db and done the math in Matlab and I got this :
Normaly S11 would be something periodic along the frequencies like the one below but it is not the result I got ...
Any idea ? Thanks you !
I got VSWR(S11) measurement from a molex flat cable 4 inches long and I want to obtain S11, so I do : S11 = (VSWR-1)/(VSWR+1) but the result I got is not consistent...
Molex cannot give me the S-parameters files so I want to extract data from graphs.
My aim is to obtain S11 and then use FFT to get TDR response on it so I can after get TDR of impedance along the line.
My experimental data are the one below :
I import the value to Matlab using a tool to extract the data :
and after extracting the magnitude from the db and done the math in Matlab and I got this :
Normaly S11 would be something periodic along the frequencies like the one below but it is not the result I got ...
Any idea ? Thanks you !
Last edited: