With good read range and fast data rate, UHF Radio Frequency Identification (RFID) is deployed in the supply chain to identify each item uniquely. However, UHF transmission power is easily absorbed by ionised liquids, such as water. Hence, normally, in an environment with lots of liquid products, an HF RFID system is chosen instead. This paper investigates the feasibility of designing a dual-frequency (HF and UHF) RFID antenna, with frequency ratio of up to 70, to embrace the benefits offered by both the UHF and HF RFID systems. Also, this paper shows that with careful design, a single feed dual-frequency RFID antenna can be achieved. A prototype of the dual-frequency RFID antenna is presented in this paper, with validating simulation and measurement results.
The 3rd International Conference on the Internet of Things (IoT2012) will include a highly selective dual-track program for technical papers, accompanied by reports on business projects from seasoned ...
Mark Weiser first proposed Pervasive Computing two decades ago and we've explored the space of his ideas in that time. It's time to explore new wild and crazy -- "hot" -- ideas! The goal of PerHot is ...
As part of their research for GS1, members of the Auto-ID Labs research network have presented a recent update at GS1's Industry and Standards Event in Brooklyn, March 2011.
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