Our customer is in trouble with harmonic distortion of HMC1093. The output level of "5xLo - RF" and "5xLo - IF" are around 20dB bigger than "RF - 4xLo" and "4xLo + IF".
(1)Does 4x multiplier generate 3rd and/or 5th harmonics? And, how much are the level?
(2)Are the 3rd and/or 5th harmonics suppressed by filter or something circuit after 4x multiplier?
(3)Do you have any idea for improving the output level of "5xLo - RF" and "5xLo - IF"?
IF is around 4.7GHz, Lo is around 9.3~9.4GHz, RF is around 42GHz.