Anti-metal tag antenna

Abstract

The invention discloses an anti-metal RFID tag antenna adopting a double-layer medium structure, which comprises an upper-layer medium at the upper layer and a lower-layer medium located at the lower layer of the upper-layer medium, wherein the upper surface of the upper-layer medium is covered with a radiation metal patch; the upper surface of the lower-layer medium is covered with a feed metal patch; the lower surface of the lower-layer medium is covered with a copper material as a grounding plate; the upper-layer medium is provided with an upper metal via hole; the lower-layer medium is provided with a lower metal via hole; the upper-layer medium and the lower-layer medium are grounded through the upper metal via hole and the lower metal via hole respectively; the middle of the upper-layer medium is provided with a slot; and the feed metal patch is connected with a chip. By adopting the high-dielectric constant anti-metal tag antenna with a three-dimensional structure, the bandwidth is 3 MHz, the gains are -3.8 dBi, the current flow direction is changed through the three-dimensional structure, the current flow path is increased, miniaturization of the antenna is realized, the size is small, the anti-metal feature is realized, and the anti-metal tag antenna can be widely applied to identification of a small metal object and can be applied to an embedded RFID identification system.

Description

technical field [0001] The invention relates to a tag antenna, in particular to a metal-resistant RFID tag antenna adopting a double-layer dielectric structure, which belongs to the technical field of RFID Internet of Things. Background technique [0002] In recent years, information technology has greatly affected the development of society. Especially in the industrial field, the production process of products, procurement, sales, distribution and even the general organizational structure of the company are greatly affected by information technology. In this case, in order for the company to grow and be efficient according to the needs of the market, a new information management technology is required to achieve optimal planning and ensure the implementation of tasks. Radio frequency communication is a technology that contributes the most to this. In this system, radio frequency identification (RFID) has been applied to automatic identification of products, animals and ev...

AI Technical Summary

Problems solved by technology

However, these tags often have the disadvantages of large size, narrow bandwidth, poor performance, complex processing, and high cost, which are difficult to meet the needs of practical applications.

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