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Dual-interface SIM card and radio frequency identification system thereof

A radio frequency identification system and dual-interface technology, applied in the field of radio frequency identification systems, can solve problems such as damage, antenna breakage, and large bandwidth occupation, and achieve the effects of expanding application range, signal enhancement, and reducing capital and time investment

Inactive Publication Date: 2009-10-21
SHANGHAI QUANRAY ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of these two solutions are: the antenna is attached to the surface of the SIM card or drawn out to the front or back of the mobile phone, which will easily cause the antenna to break and damage during the installation process, and cause user inconvenience; The shielding effect of the dual-interface SIM card can receive the signal from the reader and the signal reflected to the reader is very weak. If the signal returned by the dual-interface SIM card is not amplified and the reader matched with the dual-interface SIM card If there is no signal booster on the phone, the quality of communication between the dual-interface SIM card and the reader will be very poor, and the reader will hardly receive the response returned by the dual-interface SIM card
This technology has good anti-interference performance, but occupies a large bandwidth

Method used

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  • Dual-interface SIM card and radio frequency identification system thereof
  • Dual-interface SIM card and radio frequency identification system thereof
  • Dual-interface SIM card and radio frequency identification system thereof

Examples

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Embodiment Construction

[0050] refer to image 3 , the embodiment of the present invention provides a dual-interface SIM card, including: a SIM card base 310, a contactless antenna 320 and a chip 330; wherein, the chip 330 and the contactless antenna 320 are embedded in the card and the chip 330 is connected to the non-contact antenna 330 through the contact card metal contacts.

[0051] Specifically, the chip 330 may include an RF interface unit, a central processing unit, an interrupt processor, a random number generator, a read-only memory, an EEPROM, an external RAM, a cyclic redundancy check module, a clock unit, and an ISO / IEC7816 unit.

[0052] Specifically, refer to Figure 4 , the RF interface unit of the chip 330 may include: a receiving amplifying unit 401 for amplifying and transmitting the signal obtained from the non-contact antenna to the demodulating unit; The signal amplified by the receiving amplifier circuit is demodulated; the digital quantization unit 403 is used to convert th...

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PUM

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Abstract

The invention discloses a dual-interface SIM card and a radio frequency identification system applying the same, wherein the radio frequency identification system at least comprises a reader and a signal enhancer. The signal enhancer is used for relaying and strengthening signals between the dual-interface SIM card and the reader, and the reader is used for sending command signals to the dual-interface SIM card and receiving response from the dual-interface SIM card by the signal enhancer. The dual-interface SIM card and the radio frequency identification system successfully apply mobile communication equipment to an RFID system, thereby realizing non-contact short-distance radio frequency identification with low cost.

Description

technical field [0001] The invention relates to a Subscriber Identity Model (Subscriber Identity Model, hereinafter referred to as SIM) card, especially a dual-interface SIM card and a radio frequency identification system including the dual-interface SIM card. Background technique [0002] After more than ten years of development, radio frequency identification technology (Radio Frequency Identification, hereinafter referred to as RFID) technology, including contactless integrated circuit card (Integrated Circuit Card, referred to as IC card), has penetrated into every corner of modern life and is widely used in Public transportation, access control, small electronic payment and other fields. [0003] Radio frequency identification technology is a kind of automatic identification technology. The composition of radio frequency identification system generally includes at least two parts: electronic tag (Tag) and reader (Reader). Electronic tags are used to store electronic d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/07G06K7/00H04M1/725H04W88/02H04M1/72412
CPCG06K7/10178G06K19/0723
Inventor 金可威
Owner SHANGHAI QUANRAY ELECTRONICS
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