| Summary: | 碩士 === 國立交通大學 === 電機工程學系 === 105 === This paper presents an innovative RF Tag system powered by an indoor light source. The RF transmitter design includes a trans-impedance amplifier, a sub-harmonically injection locked phase locked loops (PLL), and a low-power Class-E power amplifier. The prototype chip was fabricated in a 0.18m CMOS process.
Nowadays, with rapid development in wireless communication, short-range communication systems have been widely used in wireless sensor networks and Internet of Thing (IoT) applications. Different from typical RF communication, the proposed system relies on recycling indoor light sources as an energy source. The new technology solves the problem of shortage of energy supply in miniaturized wireless sensors, however, it requires low-power and high data-rate wireless communication system that can be supported by the constrained energy harvested from the indoor lights. A wireless transmitter is usually the most power consuming blocks in the active wireless tags. The chip was fabricated using 0.18 um CMOS
technology and was verified first on an assembled PCB. The proposed wireless transmitter
achieves a maximum transmit power of -21.3dBm and data rate of 2Mbps while total power
consumption is 145W. The chip area including pads is 0.944mm
2
. The measured results
match well the theoretic analysis and the simulation results.
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