Simplifying Backscatter Deployment: Full-Duplex LoRa Backscatter
summary
Claims a working long-range full‑duplex LoRa backscatter reader that achieves 78 dB self‑interference cancellation using a hybrid coupler, a microcontroller and a novel two‑stage tunable impedance network (tunable capacitors, inductors, resistors) with standard LoRa chipsets. The prototype is a small, low‑cost reader (about <$30 reader, ~10% above two half‑duplex units), communicates with tags up to 300 ft range LOS (300+ ft at low rates), 4,000 ft² office tests, drone coverage ≈7,850 ft², and a contact‑lens demo beyond 20 ft.
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