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ADL5380 IQ Magnitude Imbalance

Question asked by XJLee on Feb 2, 2018
Latest reply on Feb 6, 2018 by XJLee

   Hi,there:

        I have a question to ask for some advices.   The appendix show the Schematic of  ADL5380 and hmc960 .  The  output of  IQ  magnitude is imbalance. The magnitude of  I channel is twice than that of Q channel at some frequence.

And it doesn't reach the target in datasheet. Is my schematic is not right  at somewhere?  I have no idea about it. My test frequence  is 2G to 6G  in RF and LO .Then, output is IQ sine wave whose frequence is 10KHz ~ 20KHz.

 

                                                                                Look forward to your reply !!

 

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