[Eval-ADL5380] Frequency issue of quadrature demodulator

Hi,

Is it relevant to use the quadrature demodulator ADL5380 evaluation board in a Doppler radar project in terms of frequency? When LO and RF inputs are beneath 20kHz different, I and Q outputs are not sinusoidal anymore. It seems there is a filter that filter low frquencies.

Thank you in advance.

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