Measure the gain of LNA by network analyzer and noise analyzer respectively, but there is about 1dB difference between the two results.Actually, it is about 1dB lower when measured by noise analyzer. What's the reason? Should i only trust the S21 measured by network analyzer? and only use the noise analyzer to measure NF?
i think u need to calibrate both ,
about the compression in the LNA , it is can't be done using noise figure meter , speciallay the output of the noise source is small
i think u need to calibrate both ,
about the compression in the LNA , it is can't be done using noise figure meter , speciallay the output of the noise source is small
Is it because the input power of noise source is too high and the LNA is in compression? If so, is the measured NF correct? and should the actual NF be higher or lower?
The LNA is on wafter tested on the probe platform, I think the DC supply is clean enouth.I want to know if the gain difference measured by the two equipments is due to the calibration of NF analyzer? In this case, is the measured NF trustable?
Thx!