Biography
Enrollment Date: 2007
Graduation Date：2010
Degree：M.S.
Defense Date：2010.06.04
Advisors：Chun Zhang
Department：Institute of Microelectronics，Tsinghua University
Title of Dissertation/Thesis：Study on Key Technologies of Hybrid RFID Transponder
Abstract:
RFID (Radio Frequency Identification) is a non-contact automatic identification technology which employs radio frequency signal, by way of electromagnetic coupling, to exchange data between a reader and a transponder for the purpose of identifying individual items and data transmission. RFID technology is widely used in logistics, manufacturing and public information services industries, which aims to significantly improve the management efficiency and reduce costs, with the rapid development of IC design technology. Passive UHF RFID tags, although have some advantages of low costs, long identification range and higher recognition speed, still there are many weaknesses that we can’t ignore, such as strong electromagnetic radiation, poor security and immunity to interference, which leads to some serious limitations of special fields or military applications accordingly to meet . This paper presents the concept of hybrid RFID tags against the shortcomings of UHF RFID tags mentioned above, both the traditional way of electromagnetic coupling and the way of photoelectric conversion can be used to provide energy or data exchange. Therefore, the “hybrid RFID tags” can choose between four modes depending on the different requirements of application environment on anti-jamming capability, electromagnetic radiation and security to meet specific application requirements. We focus on photoelectric conversion, design of low-voltage circuit and long distance optical communication according to the analysis of hybrid RFID tags, and complete design of photoelectric analog front-end circuit and optical communication verification system, including the standard CMOS process photodiode layout, chip testing, model extraction and the low-voltage circuit design and testing accordingly which consisting of clock generator, power recovering circuit, level convertor and so on. The results show that the feasibility of optical RFID tags.