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. Author manuscript; available in PMC: 2024 May 17.
Published in final edited form as: IEEE J Radio Freq Identif. 2023 May 17;7:118–133. doi: 10.1109/jrfid.2023.3276310

Fig. 5.

Fig. 5.

Harmonic RFID system which utilizes the third harmonic signal for downlink and uplink transmissions between the reader and tag. The system consists of a conventional UHF interrogator, a custom designed harmonic RF layer and a harmonic RFID tag [82].