Sep 14, 2017

Here's the paper: https://homes.cs.washington.edu/~gshyam/Papers/loRaBackscatt...

Tech like this already exists (look up "UHF RFID") and the picture they've got looks very similar to existing tags (image search for "alien rfid tag").

The interesting thing here is managing to implement LoRa's modulation scheme in a passive tag.