Multipurpose tag antenna

Abstract

The invention relates to a multipurpose tag antenna. The multipurpose tag antenna comprises a radiation patch, a dielectric substrate and a metal grounding plate. The radiation patch is a metal patch, and is printed on the front face of the dielectric substrate, and annularly-intersected micro-strip patches are arranged on the surfaces of the radiation patch; a symmetrical and annular-intersected dipole antenna structure is formed by the micro-strip patches, and the resonant frequency, the input impedance and the operation bandwidth of the antenna are adjusted by adjusting the number of circular rings, the size of the radius and the filling degree of the circular rings; a RFID chip is arranged in the center of the radiation patch, and the radiation patch is connected with the chip through a micro-strip feed line; the metal grounding plate is printed on the back face of the dielectric substrate; a high-dielectric-constant dielectric plate is also pasted on the back face of the grounding plate. The multipurpose tag antenna is simple and reasonable in structural design, low in cost and suitable for multiple complex environments; the radiation patch adopts the micro-strip patches formed in the mode that the multiple metal circular rings are intersected, variation of tag resonance frequency points can be achieved, and therefore the antenna miniaturization aim can be achieved.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a multipurpose tag antenna. Background technique [0002] With the continuous development of Internet of Things technology, RFID technology is facing huge challenges. Applying RFID technology to cold chain logistics is a hot spot in the research of RFID tag antennas in recent years. The tag antenna required by the market should have the following basic characteristics: small size, low cost, long readable distance, adapt to the UHF RFID frequency band requirements of different countries around the world, can be attached to the surface of any object such as metal, muscle, etc., can adapt to various A harsh working environment, etc. These requirements are problems to be solved urgently in the field of RFID tag antenna research. At present, the problem of adapting RFID tag antennas to various environments is one of the research hotspots, and research in this field...

AI Technical Summary

Problems solved by technology

[0007] At present, the tag antennas on the market generally have the following problems: ①The applicable environment is single, and cannot be used in the environment of special media such as water and blood; ②The working frequency bandwidth is not enough, and it can only be used for specific UHF in a certain region RFID frequency band; ③ complex structure and complicated manufacturing process; ④ cost is not low enough

[0008] When the antenna is attached to the surface of a special medium, the radiation characteristics of the antenna will decrease sharply, which will have a negative impact on the performance of the antenna

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