Abstract
This paper presents a novel compact design of a low cost fully printable slot-loaded bowtie chipless RFID tag. The tag consists of two trapezoidal metallic patches loaded with multiple slot resonators. Slots with similar size or adjacent frequencies are loaded alternately on two bow-tie patches to double the number of data bits within the UWB frequency band without increasing the mutual coupling between slots. A coding capacity of 12 bits is obtained with 12 slots within a reasonable size of 35 mm×33 mm. RCS of the tag has been given by simulation. Measurements have been done using a bistatic radar configuration in the frequency domain and transmission coefficient is measured. The agreement between the simulation and measurement validates this new concept of design. This tag has high data capacity and low cost and can be directly printed on product such as personal ID, credit cards, paper, and textile because it needs only one conductive layer.
Highlights
Radio frequency identification (RFID) is an automatic identification technology that uses EM waves to extract encoded data from remote tags [1, 2]
The RFID tag has some advantages over the current mainstream optical barcode [3], such as longer reading range, non-line-of-sight reading, and automated identification and tracking, and has the potential to replace the barcode [4]
Conventional RFID tag contains silicon chip and antenna and has higher cost, making it difficult to compete with the low cost barcode technology
Summary
Radio frequency identification (RFID) is an automatic identification technology that uses EM waves to extract encoded data from remote tags [1, 2]. Hybrid coding technique for chipless tag has been presented in [14] with coding capacity up to 23 bits, but the required frequency resolution cannot be implemented for data encoding. A 16-bit fully printable slot-loaded dual-polarized chipless RFID tag has been presented in [16] with improving coding efficiency with the aid of a pair of dual-polarized antennas. A bow-tie chipless RFID tag is presented It consists of two symmetrical trapezoidal metallic patches loaded with 12 pairs of slot resonators corresponding to 12bit data. High data capacity is achieved by the tapering length of slot resonators loaded on a patch This compact tag has a reasonable physical size of 35 mm × 33 mm and it operates within the UWB frequency band.
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