Baiqiang Yin

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This paper presents a passive wireless humidity sensor for concrete monitoring. After discussing the transmission of electromagnetic wave in concrete, a novel architecture of wireless humidity sensor, based on Ultra-High Frequency (UHF) Radio Frequency Identification (RFID) technology, is proposed for low-power application. The humidity sensor utilizes the(More)
The electronic toll collection systems (ETC) are used widely in many countries with its higher toll efficiency. The geometric features of target vehicle and electric conductivity of the application scenarios affect the ray propagating path and path loss of ETC system. In this paper, we propose a propagation loss model for ETC system based on Ray-tracing and(More)
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