Towards the Improvement of Frequency-domain Chipless RFID Readers

Chipless RFID readers widely use two antennas for the interrogation of the tag and reception of the response, making them heavy and bulky. Also, the strong self-jamming leakage signal degrades the sensitivity of the reader, and compromises the maximum reading range of the system. Furthermore, FCC regulatory restrictions for UWB applications makes FMCW readers unlikely as a practical solution in such technology. Herein, we propose a single-antenna LSFCW chipless RFID reader enabled with a self-interference compensation unit and an enhanced signal generation technique to address the above constraints. The proposed solution holds great promise for commercial adoption of this technology, particularly for handheld devices.