I use the K-LC6 24 GHz microwave module in the linear frequency-modulated signal mode to determine the distance to moving objects. But if I put a barrier in front of this radar while it is moving, I can determine it, but as soon as the object becomes motionless, I no longer see it. Is it possible to somehow determine the introduced barrier in front of the microwave module? At a distance of up to 0.5m or closer. That is, not just at the moment the barrier was introduced, but after the barrier remained and became stationary?

  • $\begingroup$ You are going to have to provide more details. For instance, how are you processing the received data? $\endgroup$ Mar 2, 2020 at 15:00
  • $\begingroup$ @ AnonSubmitter85 The output of the I microwave module, then an amplifier, then a band-pass filter (to cut off unnecessary spec and normalize the gain) and the ADC. $\endgroup$
    – red15530
    Mar 2, 2020 at 17:44
  • $\begingroup$ What about after the ADC? How are you performing the detection? $\endgroup$ Mar 2, 2020 at 19:34
  • $\begingroup$ @AnonSubmitter85 I pass the digitized signal through a series of filters and get the Doppler frequency. $\endgroup$
    – red15530
    Mar 3, 2020 at 18:08
  • $\begingroup$ Once there is no movement, the target is at zero Doppler. I am guessing that your detection algorithm ignores this frequency. What about range? Do you do any sort of range compression? Can your form a range/Doppler map and do your detection on that? $\endgroup$ Mar 4, 2020 at 2:46


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