mmwave detect through wood and/or concrete?

Hi

Are you asking about mmwave - 24GHz Microwave Radar Sensor (20 Meters) (SKU:SEN0306)?

https://www.dfrobot.com/product-1882.html

If yes, this sensor can penetrate most non-metallic materials, dust, smoke and fog, according to our datasheet. So, yes, it can detect through wood. I'm not sure whether it can go through concrete, that depends on the thickness.

Hope it can help.