AnsweredAssumed Answered

Measuring very lossy item S21 and S11

Question asked by stanleysg on Mar 20, 2014
Latest reply on Mar 20, 2014 by drkirkby
hi all,

if i am using network analyzer ( be it E5071C or PNA or PNA-X) to measure a very lossy item, at S21 about -80 or -90dB.

by using uncertainty calculator, i notice that uncertainty increases at higher range if the S21 range measure ( transmission coefficient) is at too low, like at below -80dB.

Any idea we can try to help increase the accuracy?

Example, i would lower down IFBW, any other setting i can help? the frequency is from 1-5GHz.