TWM459635U - Receiving end elements for near field communication and receiving device comprising the same - Google Patents

Abstract

Provided in the present utility model is a receiver-side component for use in near field communication. The receiver-side component comprises: a smart card, a first coil arranged on the smart card, and a second coil in proximity to the first coil and coupled to the first coil, where the area of the second coil is greater than the area of the first coil. Also provided in the present utility model is a receiver device comprising the receiver-side component. The device comprises a smart card slot, while the second coil is fixed onto a housing of the receiver device.

Description

Receiver component for near field communication and receiving device including the same

The present invention relates to a receiving end element for near field communication and a receiving device including the same.

Near Field Communication (NFC), also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that allows non-contact point-to-point data transmission (within 10 cm) between electronic devices to exchange data. This technology evolved from contactless radio frequency identification (RFID) and is backward compatible with RFID. Because near-field communication has natural security, NFC technology is considered to have broad application prospects in the field of mobile payment.

The NFC device has a built-in NFC chip that forms part of the RFID module and can be used as an RFID passive tag, for example to pay for the cost; it can also be used as an RFID reader, for example for data exchange and retrieval. NFC technology supports a variety of applications, including mobile payments and transactions, peer-to-peer communications, and in-service information access. Through NFC devices, people can connect with any entertainment device and transaction they want at any time, anytime, through any device, to complete payment, get poster information and more. Overall, the application of NFC equipment can be divided into the following four basic types: for payment and ticket purchase, for electronic ticket, for smart media, and for exchanging and transmitting data.

Existing mobile payment SWP (Single Wire Protocol) The protocol-SD card technology solution makes it possible to conveniently and securely implement remote and near-field payment functions on NFC-enabled mobile terminals (for example, mobile phones). In addition to the data storage function of the ordinary SD card, the smart SD card has a smart card with financial security level embedded as a payment information carrier, so that the bank card information is safely stored in the card. It can also store your own data as you would a normal SD card. Compared with the ordinary SD card, the smart SD card has a great improvement in security. Therefore, combining it with the SWP interface protocol for single-wire duplex communication can realize remote payment and NFC-based near at the same time. Field payment function.

However, technologies such as the SWP-SD card mobile payment solution have high security and achievability, but still require a relatively large transformation of the mobile phone hardware. Mobile payment terminals such as mobile phones need to increase at least the analog front-end circuit supporting NFC, and the generally analog analog front-end circuit can only be integrated on the motherboard of the mobile phone. Therefore, users need to replace the NFC-enabled mobile phone to support the SWP-SD card mobile payment solution, which makes the promotion of similar programs more expensive, which limits the promotion of near-field payment.

Therefore, there is a strong demand for a scheme for realizing NFC near field action payment with as little as possible to change the hardware structure of the mobile payment terminal.

In order to solve the above problems, the present invention provides a receiving end element for near field communication, the receiving end element comprising: a smart card; a first coil disposed on the smart card; and proximate to the first coil and With the stated a second coil magnetically coupled to the first coil, wherein an area of the second coil is greater than an area of the first coil.

Preferably, the second coil is disposed on another plane substantially parallel to a plane in which the first coil is located, and an area surrounded by the second coil is at a position where the first coil is located The projection on the plane completely covers the first coil.

Preferably, the receiving end element further comprises a capacitor forming an LC resonant circuit in series with the second coil.

Preferably, the capacitance and the second coil are arranged to be substantially in the same plane.

Preferably, the first coil is arranged to be directly connected to the antenna interface of the smart card.

In some embodiments, the smart card is a smart SD card or a SIM card.

The present invention also provides a receiving device for near field communication, the receiving device comprising: a receiving end component for near field communication, the receiving end component comprising a smart card and a first attached to the smart card a coil and a second coil proximate to the first coil and magnetically coupled to the first coil, wherein an area of the second coil is greater than an area of the first coil; a smart card for carrying the smart card a slot; wherein the second coil is secured to a housing of the receiving device.

In some embodiments, the receiving device is a cell phone and the second coil is secured to a back cover of the cell phone.

In other embodiments, the receiving device is a mobile phone, and The LC resonance circuit is fixed to the back cover of the mobile phone.

The present invention's receiving end component for near field communication and the receiving device including the same can provide a good solution for near field mobile payment, which can be used as a transitional solution for promoting mobile payment habits such as mobile payment. It can coexist with other technical solutions such as the SWP-SD card solution as a viable solution after the mobile payment market matures. The method of the present authoring will be described below in conjunction with specific embodiments.

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. It is to be understood that the various embodiments of the present invention are not intended to

Fig. 1 schematically shows the construction of a receiving end element for near field communication according to a first embodiment of the present invention. As mentioned in the prior art, Near Field Communication (NFC), also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that evolved from contactless radio frequency identification (RFID). And backward compatible with RFID. Therefore, like RFID, NFC information is also transmitted through electromagnetic induction coupling of the radio frequency portion of the spectrum. NFC antennas are usually arranged on contactless card reader devices suitable for NFC communication. They are near-field coupling antennas operating in the 13.56 MHz band. The read/write distance is very short, so they must be arranged at the receiving end to match them. A receiving antenna suitable for magnetic field coupling.

As shown in FIG. 1, the receiving end element according to the first embodiment of the present creation The smart card 101, the first coil 102, and the second coil 103 are included. As we all know, smart cards are now widely used in a variety of mobile terminal devices such as mobile phones, personal digital assistants (PDAs), laptops, and tablets. Therefore, using the smart card as a carrier for the receiving antenna enables the ability to communicate in close proximity with minimal changes to the hardware structure of the terminal device. The terminal device only needs to have a smart card slot, and this has almost become the standard configuration of most electronic products. The smart card may include various smart card configurations commonly used in the prior art, such as a smart SD card, a SIM card, a smart miniSD card, and a smart microSD card.

The first coil 102 is disposed on the smart card 101, which is used as part of the receiving end antenna. In an embodiment, the first coil can be implemented, for example, by printing a first coil 102 of copper directly onto an insulating material encapsulating the smart card wafer. Alternatively, the first coil may be coplanarly packaged inside the smart card with the smart card wafer, wherein the wafer portion may be formed on a blank portion of the smart card 101 other than the first coil. Regardless of the method used, such a patch-type configuration does not significantly change the shape and size of the smart card, so there is no need to modify the existing smart card slot or the like. Additionally, regardless of the arrangement, the first coil 102 can be directly coupled to the antenna interface of the wafer within the smart card 101 to operate the wafer.

In fact, it is known that a single coil, such as the first coil 102, can also be coupled to a transmit antenna on an NFC contactless reader device. However, with the continuous development of semiconductor technology, smart cards have a significant miniaturization trend, and they can provide space for carrying receiving antennas. Very limited, so the area of the first coil 102 based on, for example, a smart microSD card is typically small, and the energy obtained by coupling it to the transmitting end often does not meet the needs of normal communication. According to the embodiment shown in Fig. 1, a second coil 103 is provided in the receiving end element of the present invention, which together with the first coil 102 forms a receiving antenna.

The second coil 103 is disposed adjacent to the first coil 102 and is magnetically coupled to the first coil 102. It will be apparent that the second coil 103 must also be capable of coupling with the transmit antenna (coil) of the NFC contactless card reader device. According to the present invention, the second coil 103 also adopts a patch-type configuration, and its area is larger than the area occupied by the first coil 102. The second coil may preferably be arranged on another plane parallel to the plane in which the first coil 102 is located, i.e. the first and second coils are arranged parallel to each other. In addition, the projection of the region surrounded by the second coil 103 on the plane in which the first coil 102 is located completely covers the first coil. Such an arrangement is schematically illustrated in Figure 2, wherein the second coil is more preferably arranged with its axis substantially coincident with the axis of the first coil.

The second coil 103 can be seen as a power boosting coil whose mutual inductance with the smaller first coil 102 increases the magnetic field strength of the first coil, thereby enhancing the signal transmitted through the non-contact near field communication. The strength, thus providing enough energy to ensure the normal operation of the smart card chip. In this regard, the above arrangement of the second coil 103, such as shown in FIG. 2, can more effectively ensure good magnetic coupling effects and energy transfer efficiency.

Figure 3a schematically shows a portion of a receiving end element for near field communication according to a second embodiment of the present invention; Figure 3b shows the portion shown in Figure 3a Part of the equivalent circuit.

As shown in Fig. 3a, a resonant capacitor 302 in series with the second coil 301 is added to the receiving end element of the second embodiment of the present invention, thereby forming the series resonant circuit of Fig. 3b. The inductance value of the second coil 301 and the capacitance value of the capacitor 302 should satisfy the following resonance formula:

Where f ₀ is the resonant frequency, π is the pi constant, L is the inductance of the coil, and C is the resonant capacitance.

In non-contact near-field communication applications, the series inductance and capacitance should be adjusted to operate at a resonant point of 13.56 MHz, thereby enabling more efficient coupling of signal energy to the mutual inductance parameters of the first coil. Up, thereby amplifying the signal at the 13.56 MHz resonant frequency. In order to effectively control the thickness of the portion of the element, the resonant capacitor 302 and the second coil 301 may be arranged to be substantially in the same plane. For example, the copper metal region may be printed on both sides of the insulating dielectric layer such as a film of polyester material to realize the capacitor 302, while the second coil 301 is printed on one side of the insulating dielectric layer, and the wiring is made to have one end and a capacitor. One end of 302 is connected, and the other end is connected to the other end of the capacitor 302 by punching, thereby forming the resonant circuit shown in Fig. 3b.

Fig. 4 schematically shows an embodiment of a receiving device for near field communication provided by the present creation. In general, a receiving device for near field communication according to the present invention includes a smart card slot to carry the first coil The smart card, and the second coil or its LC resonant circuit formed with a capacitor is fixed on the housing of the receiving device. The receiving device can be implemented using a variety of mobile terminals with suitable smart card slots, such as cell phones, PDAs, tablets, and the like.

In the embodiment shown in FIG. 4, the receiving device is a mobile phone 401, and the receiving end elements are arranged at their respective positions, wherein the smart card portion with the first coil is inserted into the smart card inserted in the mobile phone. In the slot, the second coil or its LC resonant circuit formed with a capacitor is attached to the inner surface of the handset back cover 402, which portion can be implemented in the form of a patch. The mobile phone 401 according to the present invention can communicate with the card reader 403 according to the orientation shown in FIG. 4, but it should be understood that even if the front side of the mobile phone 401 is aligned with the card reader 403, the receiving end component provided by the present creation is also Can have the role of enhanced communication.

In terms of the current common mobile phone design, the smart card can adopt a smart microSD card. This design enables near-field payment to share the security module of the smart chip in the SD card, enabling secure and convenient action near-field payment while ensuring remote payment. For phones with smart microSD card slots, it is easy to use the receiver components provided by this creation. No need to perform any hardware on the phone itself, except that the smart microSD card printed with the first coil is used and the second coil of the chip type or its LC resonance circuit is fixed on the back cover. Transformation. In addition, due to the use of passive components, secure near-field payment can be achieved even when the phone is out of power.

It should be noted that the above embodiments are only used to illustrate the technology of the present creation. Instead of limiting it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the embodiments of the present invention may be modified or equivalently substituted for some technical features without departing from the essence of the present invention. Covered in the scope of this creative request protection.

101‧‧‧Smart Card

102‧‧‧First coil

103‧‧‧second coil

401‧‧‧Mobile

402‧‧‧Mobile phone back cover

403‧‧‧ card reader

The foregoing and other objects, features, and advantages of the present invention will be apparent from the description of the accompanying claims.

Fig. 1 schematically shows the construction of a receiving end element for near field communication according to a first embodiment of the present invention.

Fig. 2 schematically shows the arrangement of the various parts of the receiving end element shown in Fig. 1.

Fig. 3a schematically shows a portion of a receiving end element for near field communication according to a second embodiment of the present invention; Fig. 3b shows an equivalent circuit of the portion shown in Fig. 3a.

Fig. 4 schematically shows an embodiment of a receiving device for near field communication provided by the present creation.

101‧‧‧Smart Card

102‧‧‧First coil

103‧‧‧second coil

Claims (14)

A receiving end element for near field communication, characterized in that the receiving end element comprises: a smart card; a first coil disposed on the smart card; and a magnetic coupling adjacent to the first coil and coupled to the first coil a second coil, wherein an area of the second coil is larger than an area of the first coil. The receiving end element of claim 1, wherein the second coil is disposed on another plane substantially parallel to a plane in which the first coil is located, and the area surrounded by the second coil is The projection on the plane in which the first coil is located completely covers the first coil. The receiving end element of claim 1, wherein the receiving end element further comprises a capacitor forming an LC resonant circuit in series with the second coil. The receiving end element of claim 3, wherein the capacitor and the second coil are arranged to be substantially in the same plane. The receiving end element of claim 1, wherein the first coil is arranged to be directly connected to an antenna interface of the chip in the smart card. The receiving end component of claim 1, wherein the smart card is a smart SD card or a SIM card. A receiving device for near field communication, characterized in that The receiving device includes: a receiving end element for near field communication, the receiving end element comprising a smart card, a first coil disposed on the smart card, and a second coil proximate to the first coil and magnetically coupled to the first coil The area of the second coil is larger than the area of the first coil; the smart card slot for carrying the smart card; wherein the second coil is fixed on the outer casing of the receiving device. The receiving device of claim 7, wherein the second coil is disposed on another plane substantially parallel to a plane in which the first coil is located, and an area surrounded by the second coil is The projection on the plane in which the first coil is located completely covers the first coil. The receiving device of claim 7, wherein the receiving end element further comprises a capacitor forming an LC resonant circuit in series with the second coil. The receiving device of claim 7, wherein the capacitor and the second coil are arranged to be substantially in the same plane. The receiving device of claim 7, wherein the first coil is arranged to be directly connected to an antenna interface of the smart card. The receiving device of claim 7, wherein the smart card is a smart SD card or a SIM card. The receiving device of claim 7, wherein the receiving device is a mobile phone, and the second coil is fixed on a back cover of the mobile phone. The receiving device of claim 9, wherein the receiving device The receiving device is a mobile phone, and the LC resonant circuit is fixed on the back cover of the mobile phone.