A chipless radio frequency identification tag based on directional retrospective antenna

Abstract

The invention discloses a chipless radio frequency identification tag based on a direction backtracking antenna. The chipless radio frequency identification tag comprises microstrip spiral filters, microstrip transmission lines and two three-layer broadband dual-polarized microstrip patch antennas. The specific structure of the chipless radio frequency identification tag is that an upper dielectric layer, a foam layer and a lower dielectric layer are sequentially arranged from top to bottom, wherein the upper surface of the upper dielectric layer is a square radiation path; the upper surface of the lower dielectric layer is provided with microstrip feeders of the microstrip patch antennas, the microstrip transmission lines and the microstrip spiral filters; and the lower surface of the lower dielectric layer is a metal plate, and the metal plate is provided with two pairs of H-shaped slots which are arranged on the metal plate in a mutually perpendicular manner. The chipless radio frequency identification tag can achieve the characteristic of wide-angle and long-distance identification, has the advantages of low cost, small size and light weight and can carry out mass production byadopting a printed circuit technology.

Description

technical field [0001] The invention relates to the technical field of microstrip antennas, in particular to a chipless radio frequency identification tag based on a direction traceable antenna. Background technique [0002] At the current technical level of the existing chip RFID tags, the single processing cost can be controlled at least 5 cents, because the radio frequency integrated IC in the traditional chip RFID tags is very expensive. An independent circuit processing system and a signal processing unit need to be set up in the existing radio frequency identification tag, which makes the processing technology of the radio frequency identification tag complicated and the stability is not high. When most of the existing radio frequency identification tags are placed on metal platforms, their encoding signals are unstable and their tag functions fail. The existing radio frequency identification tags still have the defect that wide-angle identification and long-distance ...

AI Technical Summary

Problems solved by technology

The existing radio frequency identification tags still have the defect of not being able to realize wide-angle identification and long-distance identification

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