CN103679931A - A radio frequency signal transmission circuit, contactless payment terminal and payment method - Google Patents

Abstract

The invention discloses a radio frequency signal transmission circuit, a non-contact payment terminal and a payment method. Wherein the radio frequency signal transmission circuit includes: a first magnetic coupling coil and a second magnetic coupling coil, the first magnetic coupling coil is connected to the SIM card; the second magnetic coupling coil includes a physically connected first sub-coil and a second sub-coil; The radio frequency signal is transmitted between the magnetic coupling coil and the first sub-coil through electromagnetic induction. The radio frequency signal transmission circuit, the non-contact payment terminal and the payment method of the present invention use a magnetic coupling coil to enable communication between the SIM card and the second magnetic coupling coil as an antenna without physical welding. In this way, the radio frequency signal transmission is stable, and the long-term use stability is good. The antenna is separated from the SIM card, and the user can easily replace the SIM card or the antenna without having to repair and replace the two together, reducing maintenance costs.

Description

A radio frequency signal transmission circuit, contactless payment terminal and payment method

technical field

The invention relates to the technical field of terminals, in particular to a radio frequency signal transmission circuit, a non-contact payment terminal and a payment method.

Background technique

With the development of VLSI technology, computer technology and information security technology, IC card technology is becoming more and more mature. Now, non-contact IC cards have begun to replace contact IC cards in many fields due to their many advantages such as convenient use, no mechanical contact wear, stability and reliability, and low maintenance costs.

Contactless cards can be divided into close-coupled IC cards (0-1cm), close-coupled IC cards (0-10cm) and loosely-coupled IC cards (0-1m) according to the working distance between the card reader antenna and the card. The international standards are ISO/IEC10536, ISO/IEC14443 and ISO/IEC15693.

The tightly coupled IC card standard was developed between 1992 and 1995. Due to its small scope of action and few advantages compared with contact IC cards, this tightly coupled system has never been really applied. The near-coupled IC card standard has been completed in the past two years. The moderate working range and low production cost make it the focus of research and development in the industry. Now almost all contactless IC cards on the market are near-coupled IC cards. The sparsely coupled IC card standard is still being revised and improved. Although its working distance can reach 1m, due to the extremely weak energy it can receive, it is impossible to perform complex processing and operations inside, which limits the field of application .

The antenna of the non-contact IC card is used to obtain the power required for the SIM card circuit to work and exchange data with the antenna of the card reader through electromagnetic coupling. The radio frequency cards for mobile payment currently on the market, especially the SIM cards of the SIMPASS type, are all in the form of off-chip antennas. This technology mainly connects the external antenna through the C4 and C8 pins on the SIM card by means of welding, physical paste, etc., and amplifies the energy transfer to the large coil of the external antenna.

The disadvantage of SIMPASS is that due to the physical connection of the antenna, the connection between the antenna and the SIM card may be unstable after long-term use; after the antenna is damaged, it will affect the process and cost of returning the whole card to the factory for repair and replacement; at the same time Because the C4 and C8 interfaces are occupied, and these two interfaces are used for high-speed data download, it will definitely have a major impact on future high-speed over-the-air download applications.

Contents of the invention

In order to solve the technical problem of unstable connection between the antenna and the SIM card in the prior art, the present invention proposes a radio frequency signal transmission circuit, a non-contact payment terminal and a payment method.

One aspect of the present invention provides a radio frequency signal transmission circuit, including: a first magnetic coupling coil and a second magnetic coupling coil, the first magnetic coupling coil is connected to a SIM card; the second magnetic coupling coil includes a physical connection The first sub-coil and the second sub-coil; the radio frequency signal is transmitted between the first magnetic coupling coil and the first sub-coil through electromagnetic induction.

Another aspect of the present invention provides a contactless payment terminal, including: a SIM card, a radio frequency signal transmission circuit, the radio frequency signal transmission circuit includes: a first magnetic coupling coil and a second magnetic coupling coil, the first The magnetic coupling coil is connected to the SIM card; the second magnetic coupling coil includes a physically connected first sub-coil and a second sub-coil; the SIM card transmits a radio frequency signal through the first magnetic coupling coil in the form of electromagnetic induction The first sub-coil; the first sub-coil sends the radio frequency signal to the second sub-coil; the second sub-coil sends the radio-frequency signal to the first sub-coil; the first sub-coil sends the radio-frequency signal The radio frequency signal is sent to the first magnetic coupling coil in the form of electromagnetic induction; the first magnetic coupling coil sends the radio frequency signal to the SIM card.

Another aspect of the present invention provides a non-contact terminal payment method, which relates to a non-contact payment terminal and a POS machine, wherein the non-contact payment terminal includes a SIM card and a radio frequency signal transmission circuit; the radio frequency signal transmission The circuit includes a first magnetic coupling coil and a second magnetic coupling coil; the first magnetic coupling coil is connected to the SIM card; the second magnetic coupling coil includes a physically connected first sub-coil and a second sub-coil;

The method includes: the non-contact payment terminal sends a radio frequency signal to the POS machine and/or the POS machine sends a radio frequency signal to the non-contact payment terminal,

The non-contact payment terminal sending a radio frequency signal to the POS machine includes:

The SIM card sends the radio frequency signal to the first sub-coil in the form of electromagnetic induction through the first magnetic coupling coil; the first sub-coil sends the radio frequency signal to the second sub-coil; the second sub-coil The coil sends the radio frequency signal to the POS machine through electromagnetic induction;

The POS machine sending the radio frequency signal to the non-contact payment terminal includes: the POS machine sending the radio frequency signal to the second sub-coil in the form of electromagnetic induction; the second sub-coil sending the radio frequency signal to the first sub-coil a coil; the first sub-coil sends the radio frequency signal to the first magnetic coupling coil in an electromagnetic induction manner; the first magnetic coupling coil sends the radio frequency signal to the SIM card.

The radio frequency signal transmission circuit, the non-contact payment terminal and the payment method of the present invention adopt a magnetic coupling coil to communicate between the SIM card and the second magnetic coupling coil as an antenna without physical welding. In this way, the radio frequency signal transmission is stable, and the long-term use stability is good. The antenna is separated from the SIM card, and the user can easily replace the SIM card or the antenna without having to repair and replace the two together, reducing maintenance costs. Since it does not need to monopolize the C4 and C8 interfaces, it will not affect future high-speed over-the-air applications. At the same time, antenna customization can be realized for some mobile phone models to improve user experience.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of a contactless payment terminal of the present invention;

Fig. 2 is a structural schematic diagram of an embodiment of a radio frequency signal transmission circuit of the present invention;

Fig. 3 is a schematic structural view of a second magnetic coupling coil embodiment of the present invention;

Fig. 4 is a schematic diagram of the actual structure of an embodiment of the contactless payment terminal of the present invention.

Detailed ways

Magnetic coupling refers to the current change of a coil, which generates induced electromotive force in adjacent coils. They are independent of each other in terms of electricity, and the mutual influence between them is linked by the magnetic field. The invention adopts the magnetic coupling coil to realize the transmission of the radio frequency signal between the SIM card inside the non-contact payment terminal and the antenna. The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , the radio frequency signal transmission circuit embodiment of the present invention includes: a first magnetic coupling coil 11 and a second magnetic coupling coil 12 , and the first magnetic coupling coil 11 is connected to a SIM card 13 .

The operating frequency points of the first magnetic coupling coil 11 and the second magnetic coupling coil 12 are the same. For example, the current communication frequencies in the mobile wireless payment field are generally 13.56MHZ and 2.4GHZ.

As shown in Figures 1-3, the second magnetic coupling coil 12 specifically includes a physically connected first sub-coil 121 and a second sub-coil 122; the first magnetic coupling coil 11 and the first sub-coil 121 are transmitted through electromagnetic induction RF signal.

The area of the first sub-coil 121 is smaller than that of the second sub-coil 122; when the radio frequency signal is transmitted from the first sub-coil 121 to the second sub-coil 122, the energy of the radio frequency signal is amplified. The second magnetic coupling coil can not only enhance the power and transmission distance of energy transmission in the direction of the field strength magnetic force line, but also change the transmission direction of the radio frequency signal so that the signal can be transmitted in the required direction.

As shown in FIG. 1 , the embodiment of the contactless payment terminal of the present invention includes: a SIM card 13 and a radio frequency signal transmission circuit. Wherein, the SIM card 13 transmits the radio frequency signal to the first sub-coil 121 through the first magnetic coupling coil 11 through electromagnetic induction; the first sub-coil 121 transmits the radio frequency signal to the second sub-coil 122 . The second sub-coil 122 sends the radio frequency signal to the first sub-coil 121; the first sub-coil 121 sends the radio frequency signal to the first magnetic coupling coil 11 in the form of electromagnetic induction; the first magnetic coupling coil 11 sends the radio frequency signal to the SIM Card 13.

Specifically, the first magnetic coupling coil 11 is wound on the SIM card 13 . The first sub-coil 121 coincides with the induction area of the first magnetic coupling coil 11 . The first magnetic coupling coil 11 is connected to the pins C4 and C8 through contacts La and Lb on the SIM card.

As shown in FIG. 4 , the radio frequency signal transmission circuit is arranged on the back cover 14 of the contactless payment terminal.

The present invention also provides an embodiment of a non-contact terminal payment method, which relates to the above-mentioned non-contact payment terminal and POS machine. The terminal sends a radio frequency signal:

1. The process of sending a radio frequency signal from a contactless payment terminal to a POS machine includes the following steps:

(1) The SIM card sends the radio frequency signal to the first sub-coil in the form of electromagnetic induction through the first magnetic coupling coil;

(2) The first sub-coil sends the radio frequency signal to the second sub-coil;

(3) The second sub-coil sends the radio frequency signal to the POS machine by electromagnetic induction.

2. The process of sending radio frequency signals from the POS machine to the contactless payment terminal includes the following steps:

(1) The POS machine sends the radio frequency signal to the second sub-coil by means of electromagnetic induction;

(2) The second sub-coil sends the radio frequency signal to the first sub-coil;

(3) The first sub-coil sends the radio frequency signal to the first magnetic coupling coil by means of electromagnetic induction;

(4) The first magnetic coupling coil sends the radio frequency signal to the SIM card.

When using the above non-contact payment terminals for payment, such as bus fare payment, put the back of the terminal close to the induction area of the bus on-board fare collection machine (POS machine) and stay there for 1-2 seconds, the bus on-board fare collection machine and Contactless payment terminals exchange payment information.

The radio frequency signal transmission circuit, non-contact payment terminal and payment method of the above-mentioned embodiments use a magnetic coupling coil to enable communication between the SIM card and the second magnetic coupling coil as an antenna without physical welding. In this way, the radio frequency signal transmission is stable, and the long-term use stability is good. The antenna is separated from the SIM card, and the user can easily replace the SIM card or the antenna without having to repair and replace the two together, reducing maintenance costs. Since it does not need to monopolize the C4 and C8 interfaces, it will not affect future high-speed over-the-air applications. At the same time, antenna customization can be realized for some mobile phone models to improve user experience.

It should be noted that: the above embodiments are only used to illustrate the present invention without limitation, and the present invention is not limited to the above-mentioned examples, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the present invention. within the scope of the claims.

Claims (10)

1. a radio frequency signal transmission circuit, is characterized in that, comprising: the first magnetic coupling coil and the second magnetic coupling coil,

Described the first magnetic coupling coil is connected with SIM card; The first subcoil and the second subcoil that described the second magnetic coupling coil comprises physical connection;

Between described the first magnetic coupling coil and described the first subcoil, pass through electromagnetic induction transmitting radio frequency signal.

2. radio frequency signal transmission circuit according to claim 1, is characterized in that, described the first magnetic coupling coil is identical with the working frequency points of described the second magnetic coupling coil.

3. radio frequency signal transmission circuit according to claim 1, is characterized in that, the area of described the first subcoil is less than described the second subcoil; When described radiofrequency signal is transferred to the second subcoil from described the first subcoil, the energy of described radiofrequency signal is exaggerated.

4. a contactless payment terminal, is characterized in that, comprising: SIM card, radio frequency signal transmission circuit, and described radio frequency signal transmission circuit comprises: the first magnetic coupling coil and the second magnetic coupling coil,

Described the first magnetic coupling coil is connected with SIM card; The first subcoil and the second subcoil that described the second magnetic coupling coil comprises physical connection;

Described SIM card sends first subcoil in the mode of electromagnetic induction by radiofrequency signal by described the first magnetic coupling coil; Described the first subcoil sends to the second subcoil by described radiofrequency signal;

Described the second subcoil sends to the first subcoil by radiofrequency signal; Described the first subcoil sends to described the first magnetic coupling coil by described radiofrequency signal in the mode of electromagnetic induction; Described the first magnetic coupling coil sends to described SIM card by described radiofrequency signal.

5. contactless payment terminal according to claim 4, is characterized in that, described the first magnetic coupling coil winding is in described SIM card.

6. contactless payment terminal according to claim 4, is characterized in that, described radio frequency signal transmission circuit is arranged on the bonnet of described contactless payment terminal.

7. contactless payment terminal according to claim 6, is characterized in that, described the first subcoil overlaps with the induction zone of SIM card the first magnetic coupling coil.

8. contactless payment terminal according to claim 4, is characterized in that, described the first magnetic coupling coil is by La in SIM card, and Lb contact is connected with C4, C8 pin.

9. a contactless terminal method of payment, is characterized in that, relates to contactless payment terminal and POS machine, and wherein, described contactless payment terminal comprises SIM card and radio frequency signal transmission circuit; Described radio frequency signal transmission circuit comprises the first magnetic coupling coil and the second magnetic coupling coil; Described the first magnetic coupling coil is connected with SIM card; The first subcoil and the second subcoil that described the second magnetic coupling coil comprises physical connection;

The method comprises: contactless payment terminal sends radiofrequency signal to POS machine transmission radiofrequency signal and/or POS machine to contactless payment terminal,

Described contactless payment terminal sends radiofrequency signal to POS machine and comprises:

Described SIM card sends to described first subcoil in the mode of electromagnetic induction by radiofrequency signal by described the first magnetic coupling coil;

Described the first subcoil sends to the second subcoil by described radiofrequency signal;

The second subcoil sends to described POS machine by described radiofrequency signal in the mode of electromagnetic induction;

Described POS machine sends radiofrequency signal to contactless payment terminal and comprises:

Described POS machine sends to described the second subcoil by radiofrequency signal in the mode of electromagnetic induction;

Described the second subcoil sends to the first subcoil by radiofrequency signal;

Described the first subcoil sends to described the first magnetic coupling coil by described radiofrequency signal in the mode of electromagnetic induction;

Described the first magnetic coupling coil sends to described SIM card by described radiofrequency signal.

10. contactless terminal method of payment according to claim 9, is characterized in that, the area of described the first subcoil is less than described the second subcoil; When described radiofrequency signal is transferred to the second subcoil from described the first subcoil, the energy of described radiofrequency signal is exaggerated.

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