Chip-free label of gap ring structure

Abstract

The invention discloses a chip-free label of a gap ring structure. The chip-free label is composed of an upper conducting layer and a lower dielectric layer. The upper conducting layer is attached to the upper surface of the lower dielectric layer. The chip-free label of the gap ring structure is mainly characterized in that rectangular gap rings are etched or printed on the conducting layer, a reader-writer is utilized for receiving an RCS (Radar Cross-Section) reflected by the label, and encoding information of the label is obtained. The rectangular gap rings with different edge lengths correspond to specific resonant frequency, and different resonant frequencies can be obtained by changing the edge lengths of the rectangular gap rings. According to various combinations that the rectangular gap rings with the different edge lengths exist or are absent, various frequency spectrum signatures are obtained on the frequency spectrum, and multi-form encoding states can be formed by means of the frequency spectrum signatures. The chip-free label of the gap ring structure can be used for management of goods in supermarkets and logistics, can completely replace bar codes due to the ultra-low cost, and meets the requirement of rapid development of the internet of things.

Description

technical field [0001] The invention relates to the field of wireless radio frequency, in particular to a chipless tag with a gap ring structure. The present invention can be applied to the goods or commodity management of the Internet of Things and supermarkets, and can replace bar codes. Background technique [0002] Radio frequency identification technology has penetrated into all aspects of people's lives, and is mainly used in logistics supply, transportation, identification and anti-theft systems. The current radio frequency identification transponders mainly have chip tags, which are suitable for bulk commodities such as mobile phones, TVs, refrigerators, etc., but for some low-priced commodities such as light bulbs, drinks, toothpaste, etc., the cost is still very high. In order to reduce the cost of labels and replace barcodes in the field of logistics, many scholars have proposed chipless labels. Chipless tags are mainly divided into two types of tags based on ti...

AI Technical Summary

Problems solved by technology

To sum up, although the above-mentioned chipless tags have made some progress in the near future, the chipless tags based on the surface acoustic filter cannot meet the requirements of the IoT system due to the cost of piezoelectric materials and manufacturing factors. Due to the requirements of cost tags, the development of other chipless tags based on time domain is limited by factors such as difficult encoding, low capacity, and complex structure.

Although the chipless tag based on the frequency domain greatly reduces the cost, the tag size is large and the coding capacity is low, and to increase the coding capacity, the size of the tag must be increased, and this type of chipless tag requires two-sided orthogonally polarized transceivers Antenna, which further increases the area of ​​the tag

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