vp1953
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Hi T3N,
passive mixers do not have as much gain as active mixers, so output in general will be smaller, though it looks really small in your case. Why LO is so small, it generally is at least several 100mV. What is the input impedance looking into the mixer and the output impedance of the LNA. If possible, please post a schematic of your mixer.
Your mixer has any filters at the output, if yes the downconverted signal is within the bandwidth of the filter?
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