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Hi-Power X-parameter measurements at lower frequency

Question asked by swapna18 on Nov 9, 2012

I am trying to do Hi- Power X-parameter measurements using  NVNA -N5424A, I am uisng Mini Circuit ZHL 42W Drive amplifier. measurement data looks fine from 1.2GHz , but when it comes to lower frequencies below than 1.2GHZ , current of the device is dropping as power increasing, because of that, when I see S -parameters extracted from X-parameters using ADS, looks bad especially , S22. Can anyone please analyze the situation here.

Thanks in adavance for any help.


Edited by: swapna18 on Nov 9, 2012 12:13 PM