I'm not sure, it always just made sense to me that the farther away someone is, ... | Hacker News

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		stavros on June 30, 2024 \| parent \| context \| favorite \| on: Inside a $1 radar motion sensor I'm not sure, it always just made sense to me that the farther away someone is, the harder it'll be to detect their small movements.

transpute on June 30, 2024 [–]

Smallness detection depends on RF: higher frequency = shorter wavelength = more resolution for imaging.

Detection range without obstacles depends on transmit power and signal reception.

There are other models in the same family which might have more power/range.

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