Abstract
An UHF Radio Frequency Identification (RFID) transponder, which can function according to either standard ISO 18000–6B or security ISO 18000–6B with Advanced Encryption Standard (AES), is presented in this paper. The UHF RFID transponder is composed of analog front-end (AFE) and digital signal processing unit. A novel demodulator in AFE is presented in this paper. Silicon area occupied by the demodulator is only 21% of traditional structure and it could demodulate input signal with data rate ranging from 10Kbps to 870Kbps. In digital processing unit, 128-bit AES algorithm is built in to ensure security communication between transponder and reader. Total chip area without test pads is 0.7mm2@0.18µm CMOS process and consumes 15µW without writing Memory.
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