Antenna structure of RFID antitheft door

Abstract

The invention provides an antenna structure of an RFID antitheft door. The antenna structure comprises a dielectric layer, a patch layer and a grounding layer, wherein the dielectric layer is a sheet-like component made of a dielectric material and having a curved surface, the dielectric layer comprises an inner side surface and an outer side surface opposite on the other side, and the inner sidesurface refers to a surface, facing one side of a curvature center of the curved surface, of the dielectric layer; the patch layer is attached to the inner side surface of the dielectric layer, and the patch layer has a signal feed-in point; and the grounding layer is attached to the outer side surface of the dielectric layer at a position corresponding to the patch layer. The antenna structure ofthe RFID antitheft door has the beneficial effects of changing a sensing angle and directivity of the antenna of the RFID antitheft door, is suitable for entrance and exit of small stores or shoppingplaces, and can solve the problem that the traditional RFID antitheft door cannot be used in small stores or shopping places.

Description

technical field [0001] The invention relates to a structure of an RFID anti-theft door, in particular to an antenna structure of an RFID anti-theft door. Background technique [0002] At present, in shopping malls using open shelves, in order to monitor and prevent goods from being stolen, Electronic Article Surveillance Systems (EAS Systems) are usually installed. The EAS system is mainly composed of a Detector, a Deactivator ) and electronic tag (Tag) are composed of three parts; there are many known electronic product anti-theft systems, including: Magnetic System (Magnetic System), Radio Frequency System (Radio Frequency System, RF System), Electromagnetic System (Electromagnetic System) ) and microwave system (Microwave System); the more common ones are radio frequency system and magnetic system. The advantage of the radio frequency system is the low cost of construction. Its working principle is to affix electronic tags with receiving antennas on the products, among w...

AI Technical Summary

Problems solved by technology

If the RFID anti-theft door adopts the general existing UHF RFID reading antenna, it is easy to read the RFID tags on the surrounding people or on the shelf and cause malfunction. Therefore, the traditional RFID anti-theft door is difficult to apply to the small store or unmanned store

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