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Forget fitness taker, smart watch and tiny little things. I'm thinking thin smartphones. If one of these can be powered by multiple RFID signal sources. Do the

by shkesar 10y ago

Forget fitness taker, smart watch and tiny little things. I'm thinking thin smartphones. If one of these can be powered by multiple RFID signal sources. Do the math for required power signal strength and get working around the limitations.

Someone 10y ago
That will not work out. Even ignoring the elephant in the room that is powering the display, a smartphone communicates wirelessly over hundreds of meters. You will never get that much power from RFID readers in any practical setup (if you're McGyver, a setup with thousands of readers, if not way more, and a few square meters of antenna might 'work', for a loose definition of the word)