RFID antenna system

Abstract

The invention relates to an antenna apparatus of an identification system, especially relating to an RFID antenna system. The RFID antenna system comprises a built-in antenna which is provided at a mobile phone SIM card. The built-in antenna connects with an RFID reader-writer chip which is integrated on an SIM card body. An inner surface of a mobile phone shell is provided with an external antenna which is electrically connected with the built-in antenna. According to the invention, through setting the external antenna at the mobile phone shell, influence of a mobile phone cell on a signal is avoided, and quality of a transmitting signal and a receiving signal are enhanced; a dimension and a shape of a present mobile phone shell are fully utilized by the external antenna, and through ingenious structural design, enough magnetic field is generated to establish data communication with an electronic tag; through combination of the external antenna and the built-in antenna, high emission frequency is generated by the antennas, a high frequency signal has strong penetrability, and a read-write distance and communication quality between the reader-writer chip and the electronic tag are reinforced.

Description

technical field [0001] The invention relates to an antenna device for an identification system, in particular to an RFID antenna system. Background technique [0002] There are many anti-counterfeiting technical solutions on the market, such as laser anti-counterfeiting, ink anti-counterfeiting, digital phone anti-counterfeiting and mobile phone SMS anti-counterfeiting. Studies in recent years have shown that the anti-counterfeiting scheme using RFID electronic tags is a very effective high-tech anti-counterfeiting means. The main content of RFID electronic tag anti-counterfeiting is to affix an RFID electronic tag to the item, which stores the unique identification code of each product, unencrypted product-related information or encrypted anti-counterfeiting certification information. The special reader can obtain the data of the electronic tag by exchanging data with the electronic tag. After the special reader / writer obtains the data of the electronic tag, it can dir...

AI Technical Summary

Problems solved by technology

However, due to the high cost and large volume of special read-write equipment, it is very difficult to promote the RFID electronic tag anti-counterfeiting system.

With the development of mobile communication technology, the RFID special read-write device is organically combined with the mobile phone, that is, the special read-write device is designed as an RFID reader chip, and the RFID reader chip and antenna are integrated in the On the SIM card of a GSM or CDMA mobile phone, ordinary mobile phones have the function of reading and writing RFID electronic tags, which is of great practical significance for the promotion of RFID electronic tag anti-counterfeiting technology. The battery is blocked, and the antenna must penetrate the mobile phone battery when transmitting signals with the outside world. Affected by the mobile phone battery and the surrounding electromagnetic field, the communication distance and communication quality between the RFID reader chip and the electronic tag are weakened to a certain extent.

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