cherry girl
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Posts: 1
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Hi kelly,
As you mentioned , you IP3 curves seem a little weird below 0 dBm.I have encoutered the same problem before, I think maybe two reasons causeing this situation. At first, it is possible that you mixer's noise performance is too bad , so in the low level of input power , the desired sigal is easily distoried by nois;For another reason ,you simulation is not accurate,you needn't use QPSS , it seems take too long time to run one time,just take harmonic balance (hb)with two tones,just remember the harmonic numbers should be large enough to ensure your simulation accuracy.
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