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Environmentally adaptive error recovery (EAER) technology for wireless communication was developed to reduce the number of communication errors and the time needed for recovery in industrial wireless networks. EAER adapts the communication frequency to the radio environment by changing the radio frequency to a better one when communication errors occur by pre-measuring the radio environment at each...
Trial production of a thin-film radio frequency identification (RFID) tag with a built-in antenna was carried out using an amorphous InGaZnO (a-InGaZnO) thin-film transistor (TFT). A rectifier circuit, RF communication circuit, and logic circuit were formed using an a-InGaZnO TFT. Even after adding an antenna, which is the thickest part, the RFID itself had a thickness of about 1 μm. The RFID operated...
A wireless wake-up receiver for lithium-ion battery systems was developed and evaluated. A 2-stage power-supply control scheme is added to the wake-up receiver for supporting low power, high receiving sensitivity, and short wake-up time simultaneously. When the battery system is in power-down mode, only a voltage detector in the wake-up receiver consumes a current while waiting for a wireless wake-up...
We have fabricated a full-wave rectifier using fully depleted amorphous In–Ga–Zn–O thin-film transistors (TFTs). The rectifier is composed of four TFTs, and it rectified 13.56-MHz wireless input from a 200-mW commercial RFID reader/writer. We also have analyzed an output voltage and an operation frequency of the fabricated rectifier.
Hitachi, Ltd. completed Hibiki project, which had been conducted by the Ministry of Economy, Trade and Industry of Japan (METI) for 2 years from August 2004, to realize 5-yen RFID inlay. This paper describes the achievement of Hibiki project; the descriptions of Hibiki RFID specifications, the evaluation results of reading and writing distance and multiple tags reading results
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