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.
At www.llrp.org, developers and reader vendors can find LLRP libraries in C, C#, Java, Perl and a Wireshark Dissector. These libraries significantly simplify control and configuration of LLRP readers.
After a trademark dispute, the EPC Prototyping Platform is now called "Fosstrak" (previously Accada). Fosstrak stands for "free and open source software for track and trace".
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