RFID tag antenna

Abstract

The present invention provides a radio frequency identification tag antenna, including a shell, in which an insulating dielectric layer is mounted, and an antenna circuit pattern is arranged on said insulating dielectric layer, and a plurality of metal radiation arms connect said antenna circuit pattern by metal connecting lines, wherein: the plane where said metal radiation arms lie in is perpendicular to the plane where said antenna circuit pattern lies in. In the present invention, the plane where said metal radiation arms lie in is perpendicular to the plane where said antenna circuit pattern lies in, so that the current flows not only in one plane of the surface of the antenna circuit pattern, but also in a plurality of different vertical metal planes, forming a three-dimensional label, making the radiation angle greater.

Description

technical field [0001] The invention relates to an antenna, in particular to a radio frequency identification tag antenna used in a radio frequency identification system of the Internet of Things. Background technique [0002] Most of the existing radio frequency identification tags adopt a flat design in structure. In terms of direction, the direction of radiation can only be determined according to the environmental surface to which the tag antenna is attached. And because the attachment surface is generally a plane, the best radiation distance can only be achieved in the direction perpendicular to the plane. Most of the anti-metal tags are planar tags with reflective surfaces, and the antenna pattern can only be limited to a planar type and a single circuit structure, which limits the effective radiation angle and the best radiation direction. [0003] As an example of such a reflective planar tag antenna, figure 1 A schematic diagram showing the structure of an existi...

AI Technical Summary

Problems solved by technology

Since the entire radiation structure of the existing planar tag antenna is located on the surface of a plane of the antenna substrate 10, the current can only flow on this plane, and when it is used in anti-metal applications, the entire structure of the antenna is often damaged. Parallel to the ambient metal plane resulting in a narrow radiation angle

The number and area of ​​the resonant arm and the loop antenna loop 20 determine that its bandwidth is not very wide

In addition, the chip pad pattern can only have two solder pin patterns to form an RFID port connected to a loop antenna loop, making it unsuitable for the application of dual-port RFID chips

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