I received a support request about HMC264LC3B from our customer. The customer has used HMC264LC3B as an up-converter for their system and he has a spurious issue.
he can see spurious at 28.02GHz when LO=12GHz (-4dBm), IF = 3.99GHz (-20dBm) and RF=27.99GHz.
in the other case;
he can see spurious at 28.55GHz when LO=12.25GHz (-4dBm), IF = 4.1GHz (-20dBm) and RF=28.06GHz.
and the other case;
he can see spurious on the RF signal when LO=12GHz (-4dBm), IF = 4.0GHz (-20dBm) and RF=28GHz.
For all cases, the customer uses an amplifier following the HMC264. The gain of the amplifier is 25dB.
Do you have any idea about a cause of the spurious and how to inprove?