Simulation And Demonstration Of A Chipless Rfid

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Simulation and demonstration of a chipless RFID tag
Literature Review

Jinkun Liu
Student No. 14002747
Supervisor: Professor Stephen J. Foti


The RFID (Radio Frequency Identification) is a growing contactless data capture technology and the foundation of Internet of Things. The chipless RFID, as a significant development, has shown a great potential. This literature review aims at providing an overview of the chipless RFID and focuses on a number of practical implementation of chipless RFID tags. A basic background of RFID system will be demonstrated firstly including definition, classification, advantages and some comparisons. A detailed introduction about current chipless RFID technologies will be illustrated. It
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Moreover, RFID tags store more dynamic information that is able to edit at every step in the supply chain. The small size of tags and invisible information guarantee security of identification. In addition, a RFID reader can process multiple tags at same time. However, its drawbacks are also not negligible. The most significant issue is the price of RFID systems. Thus, the relative expensive cost of RFID system limits its universality and makes it hard to be widespread utilization. Therefore, with the growth of technology, the chipless RFID is developed to decrease the cost and simplify the fabrication. Fig.2 Structure of Chipless RFID system [1.4]

As shown in Fig.2, there are no ASICs (Application Specific Integrated Circuit) or silicon chips inside the tag. Therefore, the tag should be able to response to interrogation impulse and reprocess the signal. The generalized theory of chipless RFID system is that the antenna motivates the reader area and induces currents on the metallic tags and the induced currents re-radiate the scattered fields back to reader. The response will be re-processed in a specific way through the designed structure, which makes tag recognizable. Normally, a chipless RFID tag is energy-efficient and battery-free because it is not necessary to support digital logic processing and maintain radiation. Thus, harvesting energy from the reader
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