Abstract
A compact chipless radio frequency identification (RFID) tag-based on slow-wave technology is introduced in this paper. The tag consists of a resonant circuit based on open stub resonators periodically loaded by shunt stubs allowing a coding capacity of 9 bits and operating in a frequency range from 2 to 4GHz. The receiving and transmitting antennas of the tag are particularly designed to minimize the tag size as much as possible. The proposed tag presents a robust bit pattern with a compact and fully printable structure using FR4 substrate for a low-cost tag.
Highlights
Radio Frequency IDentification (RFID) is one of the most rapidly growing segments of modern automatic capture and identification
A slow-wave structure based multi-resonator has been developed and a size reduction of 41.6% was reached compared to the quarter-wave open stub resonators
The developed multi resonator includes nine open stub resonators periodically loaded by shunt stubs
Summary
Radio Frequency IDentification (RFID) is one of the most rapidly growing segments of modern automatic capture and identification. Conventional chipped RFID systems have many limitations related to the use of the chip such as high cost, susceptibility in harsh environments, short life of the chip battery packs, etc. The RCS-based tags use resonant antennas that receive the signal and send it back with the tag signature [1,2,3,4,5,6,7] They can reach a high coding capacity with a compact size. The miniaturization technique based on the slow wave approach has been used to design a 9-bit compact retransmission-based tag operating in a frequency band of 2 to 4GHz. For a complete chipless tag, dual crosspolarized monopole antennas were designed and connected to the resonant circuit to establish a communication link with the interrogator
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