Mobile radio frequency device, radio frequency IC (Integrated Circuit) card and radio frequency storage card

Abstract

The invention relates to a mobile radio frequency device, a radio frequency IC (Integrated Circuit) card and a radio frequency storage card, wherein the mobile radio frequency device comprises at least one low-frequency magnetic induction circuit, at least one low-frequency amplifying circuit, at least one threshold judging and demodulating circuit, at least one second main processor, at least one radio frequency transceiver circuit and at least one radio frequency antenna, wherein the low-frequency magnetic induction circuit, the low-frequency amplifying circuit, the threshold judging and demodulating circuit, the second main processor, the radio frequency transceiver circuit and the radio frequency antenna are sequentially connected in series; and a low-frequency receiving link formed by the low-frequency magnetic induction circuit, the low-frequency amplifying circuit and the threshold judging and demodulating circuit works at the frequency below the highest frequency f0 of the calibration-free work of a previously selected system. The mobile radio frequency device can ensure that a mobile terminal provided with the mobile radio frequency device realizes card swiped transactions, i.e. electronic payment and the like.

Description

technical field [0001] The invention relates to the communication field, in particular to a mobile radio frequency device, a radio frequency IC card and a radio frequency memory card. Background technique [0002] With the popularization of mobile terminals, there is an urgent application demand for mobile terminal payment by using mobile terminals. Currently, there are many implementation schemes, but each has its own disadvantages. At present, it has appeared that a radio frequency function (referred to as a radio frequency SIM card) is added to the SIM (Subscriber Identity Module) card in the mobile terminal or a short-distance communication module is added on the main board of the mobile terminal to realize short-distance communication of the mobile terminal. The latter is called NFC (Near Field Communication, near field communication). The emergence of these methods makes the mobile terminal a super intelligent terminal that can recharge, consume, trade and authenticate...

AI Technical Summary

Problems solved by technology

[0007] 2. The 13.56MHz frequency used by NFC needs to be calibrated to be used for distance control

It can be seen that the difference in field strength received by different terminals is >30dB, and the field strength change from 1cm to 10cm for the same terminal is about 25dB. The field strength change caused by the difference between mobile phones has exceeded the field strength of the terminal within the control range of 1cm to 10cm. Therefore, it is impossible to use the same threshold to control the distance of each terminal, that is, it is impossible to realize distance control without calibration

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