Mobile phone card with radio frequency identification function

Abstract

The invention provides a mobile phone card with a radio frequency identification function. A signal receiving and emission processing chip and an antenna coupling circuit are added to the mobile phone card, and an L-shaped ferrite magnetic core is arranged in an antenna. The antenna coupling circuit can enable the efficiencies of emission signals and receiving signals to reach the maximum by adjusting the resistance value and capacitance value of the antenna coupling circuit itself. In addition, an L-shaped magnetic core antenna can increase card reader antenna coupling and metal interference resistance, and the L-shaped ferrite magnetic core is employed to enable magnetic lines in a vertical direction and a horizontal direction to penetrate the inside of the antenna such that the signal intensity is enhanced, and the communication quality is improved. The PCB antenna in the mobile phone card provided by the invention is different from a flexible PCB antenna in the prior art, the flexible PCB antenna in the SIMPass antenna scheme in the prior art has to be folded up in a mobile phone and is easily damaged after being folded for multiple times, however, the PCB antenna provided by the invention does not have to be folded. The mobile phone card provided by the invention can well perform a near-field payment function.

Description

technical field [0001] The invention relates to the technical field of smart cards for mobile phones, in particular to a mobile phone card with a radio frequency identification function. Background technique [0002] As the application of the near-field payment function becomes more and more extensive, its usage environment becomes more and more complex. [0003] First, the size requirements of the application are getting smaller and smaller, such as needing to be integrated in the SIM card or SD card of the mobile phone; [0004] Second, it needs to work normally when the SIM card is close to metal. At present, the structure of the mobile phone SIM card tray is made of metal; [0005] Third, the SIM card needs to be placed in the battery of the mobile phone, and the radio frequency signal can still penetrate the battery. [0006] The current existing SIM card and SD card design cannot well meet the requirements of the above working conditions and environment. [0007] I...

AI Technical Summary

Problems solved by technology

[0005] Third, the SIM card needs to be placed in the battery of the mobile phone, and the radio frequency signal can still penetrate the battery

[0008] However, the above two solutions have their own shortcomings. Among them, the flexible PCB board antenna of the SIMPass antenna solution needs to be stacked into the mobile phone, and it is easy to be destroyed after being folded many times; while the NFC customized mobile phone solution requires mobile phone manufacturers and communication operators. Only through business cooperation can it be implemented, and users cannot freely choose the mobile phone they need

This creates a significant limitation for the user

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