Russian invasion of Ukraine

Anyone in the know know what sort of radar signature cardboard like this gives off? Feels like this could be a good stealthy drone but I could well be wrong.
Depends on the conductivity of the cardboard, the lower the conductivity the more “radio transparent” as they used to say, the material is. The more moisture there is in the cardboard, the stronger the signature will be.

Detection however also depends on what wavelengths the radar uses, the higher the frequency the smaller the object you can detect but you need lots of processing power to do it quick enough even if you use what is called SAR (Synthetic Aperture Radar).

One alternative method to detect them at shorter ranges is to used LiDAR but the range is very limited, albeit that these drones aren’t particularly quick.
 

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