upward slope means losses, downward slope means something is wrong with the
math.
BR
Gert
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-----Ursprüngliche Nachricht-----
Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von jun zhang
Gesendet: Mittwoch, 23. September 2015 15:11
An: si-list@xxxxxxxxxxxxx
Betreff: [SI-LIST] TDR obtained by fourier transform of S11
Hi experts,
I observe a phenominon about TDR obtained by fourier transform of S11. I notice
that it gradually increases along the time axis. What does this mean?
It seems that the impedance at each position is related to, but not indepedant
of that at other position. Characteristic impedance is unique.
so can TDR not reflect characteristic impedance? Or early time TDR still can
reflect characteristic impedance? A designcon paper mentions the phenominon and
find the cause is frequency-depend loss. So I think this is a intrinstic
drawback of TDR. It can't show accurately the impedance at each position of the
link path.
Do you agree with me?
--
best wishes,
Jun Zhang
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