Abstract
A bidirectional communication protocol allows radio-frequency identification (RFID) tags to have readout of multiple tags in the RF field without collision of data. In this paper, we realized bidirectional communication between a reader system and thin-film RFID tag by introducing a novel protocol for the uplink communication. Amplitude modulation on the 13.56-MHz base carrier is used to transmit the uplink clock, whereas the data is modulated by varying pulsewidths on this clock. The technology for the thin-film RFID tags combines metal-oxide n-type transistors with organic p-type transistors resulting in a hybrid complementary technology flow. The design of the RFID tag comprises of two metal-oxide transistor rectifiers and a comparator to decode the data transmitted by the reader and different code generators that send 8 bits or 96 bits to the reader.
Original language | English |
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Article number | 6828771 |
Pages (from-to) | 2387-2393 |
Number of pages | 7 |
Journal | IEEE Transactions on Electron Devices |
Volume | 61 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2014 |
Externally published | Yes |
Keywords
- Bidirectional communication
- metal-oxide
- organic
- radio-frequency identification (RFID)
- radio-frequency identification tags
- thin-film
- thin-film transistor (TFT).