AnsweredAssumed Answered

Phase sign in S21 measurement

Question asked by lalalu on Jul 1, 2010
Latest reply on Jul 1, 2010 by daras
Hi,

Why does the phase measurement is negative?
I mean - I cal the VNA with thru and measure 0 deg. Now I add (lambda/4) length cable and measure -90 deg ?
Why the measured value is negative the logic says the measure should be +90 deg.

I'm sorry if it sound like a silly question but I ask few "experts"  and they said that the way the VNA works.  WHY ???

Thanks,
L.L.  

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