TWI722953B - Miniaturized near field communication system, near field communication device and wearable device - Google Patents

Abstract

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Description

Miniaturized near field communication system and near field communication device and wearable device

The invention relates to a near field communication system and its application, and more particularly to a miniaturized near field communication system and its near field communication device and wearable device.

With the development of near-field communication (NFC) technology, passive NFC tags can be used in the alternating magnetic field of the NFC reader, which is equivalent to the resonance of the antenna connected to the NFC reader A resistance on the loop, and the resistance change of this resistance can be caused by the antenna load on the passive NFC tag, which can generate a current change on the antenna resonant loop of the NFC reader, and make the NFC reader based on this Decode the message sent by the passive NFC tag.

However, because of the lack of active power supply for near field communication devices that require increasingly narrower body sizes, the design difficulty of passive inductive passive antenna systems is greatly increased. Due to the complexity of antenna design and the difficulty of configuration in a narrow space, it is difficult to improve the coupling ability with NFC readers, but it is also necessary for the increasingly narrow near field communication devices. Technical problems overcome.

One purpose of the present invention is to improve the sensing capability of a miniaturized passive inductive passive antenna system.

Another object of the present invention is to enable the passive antenna system to be applied to wearable devices of smaller size.

To achieve the above and other objectives, the present invention proposes a miniaturized near field communication system, which includes an antenna winding and a near field communication module. The antenna windings are stacked spirally around an axis and have a stacking height. The area of the antenna windings on any plane of the stacking height is between 1.23 (cm ² ) and 1.48 (cm ² ). The near field communication module is coupled to the antenna winding and is surrounded by the antenna winding. The near field communication module includes a near field communication chip and a metal carrier for carrying the near field communication chip, wherein the metal carrier is Define a sheet with a reference plane. The angle between the normal of the reference plane and the axis is between 60 degrees and 120 degrees.

In an embodiment of the present invention, the area surrounded by the antenna winding may be slightly circular, with a radius between 0.64 (cm) and 0.65 (cm). The stack height can be about 0.27 (cm) ~ 0.33 (cm). Further, the near field communication system can be implemented in a near field communication device, and the near field communication device may include a housing with a housing cavity defined therein, the near field communication system and a tube body, and the tube body is arranged on the In the accommodating cavity, the wall surface of the housing includes two through holes communicating with the accommodating cavity, and both ends of the tube body are respectively communicating with the corresponding two through holes.

In the embodiment of the present invention in which the area surrounded by the antenna winding can be slightly circular, the antenna winding of the near field communication system can be partially stacked under the tube body, and the remaining part can correspond to the vicinity of the tube body The ground has a recessed part that goes around the lower edge of the pipe body. The axis of the antenna winding of the near field communication system can intersect the tube body, and the near field communication module of the near field communication system is arranged in the housing between the tube body and the wall surface of the housing Cavity. The housing may include a first housing part and a second housing part. The second housing part may have a groove, and the groove of the groove communicates with the accommodating cavity for use in the near field communication system. The positioning and placement of the near field communication module.

In the embodiment of the present invention in which the area surrounded by the antenna winding can be slightly circular, it can be applied to a wearable device, including: a near field communication device with a slightly bead-shaped housing, and a plurality of beads Body and series connection unit. Each of the beads has a through hole penetrating the bead. The serial connection unit can pass through the near field communication device through the two through holes of the tube body and the shell of the near field communication device, and pass through the through holes of each bead.

In an embodiment of the present invention, the area surrounded by the antenna winding may be slightly rectangular, with two sides each ranging from 1.375 (cm) to 1.475 (cm) and 0.9 (cm) to 1 (cm). The stack height can be about 0.42 (cm) to 0.48 (cm). Further, the near field communication system may be implemented in a near field communication device, the near field communication device may include a housing with a housing cavity defined therein, the near field communication system and a base, and the base may be configured In the accommodating cavity and used to carry the near field communication system, the base includes a ring groove, a matching portion and a seating portion disposed in the ring groove, and the seating portion has a communication through the base A positioning area defined by the hole, the positioning area is for positioning and placing the near field communication module of the near field communication system, and the ring groove is for positioning and placing the antenna winding of the near field communication system.

In the embodiment of the present invention where the area surrounded by the antenna winding may be slightly rectangular, the matching area may have at least one rib.

In the embodiment of the present invention in which the area surrounded by the antenna winding can be slightly rectangular, it can be applied to wearable devices, including: a near field communication device with a slightly rectangular block-shaped housing and a series connection unit. One end of the base of the near field communication device may include a connecting part. The serial connection unit can fasten the near field communication device by the connection part.

Accordingly, the near-field communication system includes an antenna winding and a near-field communication module. The antenna winding is spirally stacked around an axis and has a stacking height, and the antenna winding is placed on any plane of the stacking height. In a miniature near field communication system with a surrounding area ranging from 1.23 (cm ² ) to 1.48 (cm ² ), the near field communication module includes a near field communication chip and a metal carrier that carries the near field communication chip, wherein the The metal carrier is a sheet body defined with a reference plane. The angle between the normal line of the reference plane and the axis is arranged to be between 60 degrees and 120 degrees, so as to effectively further improve the sensing ability of passive sensing, and With the configuration conditions of the embodiments disclosed in this case, the near field communication system disclosed in this case can be applied to near field communication devices and wearable devices.

In order to fully understand the purpose, features and effects of the present invention, the following specific embodiments are used to illustrate the present invention in detail with the accompanying drawings. The description is as follows:

Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 1 is a schematic diagram of a near field communication system according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a configuration angle of the near field communication module of FIG. 1. This embodiment illustrates the configuration relationship between the antenna winding 100 and the near field communication module 200. The configurable space of the antenna system in the device is becoming narrower, and it must be able to have a certain degree of coupling with the NFC reader (communication can only be carried out) to meet the requirements of the NFC reader. Therefore, the embodiment of this case The system reveals a specific configuration method to improve the sensing capability of the passive antenna system.

The antenna winding 100 is spirally stacked around an axis Z. The size of the range surrounded by the antenna winding 100 can define the size of the antenna. In a limited space, the surrounding area A of the antenna winding 100 disclosed in the embodiment of this case ranges from 1.23 (cm ² ) to 1.48 (cm ² ), which is an extremely narrow antenna size. On the basic plane defined by the antenna winding 100 (for example, the plane formed by at least three points at the bottom of the antenna winding 100), the stack height H of the antenna winding 100 can be defined, and the stack height H can also be defined in parallel to the basic plane Any plane.

Such an extremely narrow antenna size can be matched with a specific configuration relationship with the near field communication module 200. As shown in FIG. 2, the near field communication module 200 includes a near field communication chip 210 and carries the near field communication chip 210. The metal carrier board 220. Wherein, the near field communication module 200 is surrounded by the spirally stacked antenna winding 100. In addition, the metal carrier 220 is a sheet body defining a reference plane E1, and the included angle θ between the normal line of the reference plane E1 and the axis Z It is between 60 degrees and 120 degrees, preferably between 80 degrees and 100 degrees.

For example, the metal carrier 220 may be a plate body with a metal layer on the substrate, or a plate body made of metal material. The near field communication chip 210 can be carried on the metal carrier 220 by attaching, or fixed on the metal carrier 220 in other ways.

Since the configurable space of the antenna system must be reduced, there is an important configuration between the near field communication module 200 and the antenna winding 100 under the arrangement relationship where the near field communication module 200 is configured as the middle part surrounded by the antenna winding 100 relationship.

The area surrounded by the antenna winding 100 shown in FIG. 1 is slightly circular, and the radius may be between 0.64 (cm) and 0.65 (cm). The stack height H of the antenna winding 100 can be about 0.27 (cm) ~ 0.33 (cm).

Next, please refer to FIG. 3, which is a schematic diagram of the near field communication system in another embodiment of the present invention. The area surrounded by the antenna winding 100 illustrated in this embodiment is slightly rectangular, and the length of one side can range from 1.375 (cm) to 1.475 (cm), and the length of the other side can range from 0.9 (cm) to 1 (cm). The stack height H of the antenna winding 100 can be about 0.42 (cm) to 0.48 (cm).

Next, please refer to FIG. 4, which is a schematic diagram of the structure of the near field communication device in an embodiment of the present invention. FIG. 4 is an example of the case of the near field communication device having a slightly spherical shape. In this embodiment, the near field communication device includes an antenna winding 100, a near field communication module 200, and a housing 300. The housing 300 includes a first housing part 310 and a second housing part 320. The first housing part 310 and the second housing part 320 can define a accommodating cavity, and a tube 330 is disposed in the accommodating cavity. There are two through holes 340 on the wall surfaces of the first housing portion 310 and the second housing portion 320 of the housing 300, and the two through holes 340 communicate with the accommodating cavity. The second housing part 320 may have a groove 322, and the notch of the groove 322 communicates with the accommodating cavity. The groove 322 may be used for the placement of the near field communication module 200 of the near field communication system for positioning. The configuration of the angle θ between the normal line of the aforementioned reference plane E1 and the axis Z.

Both ends of the pipe body 330 can be respectively connected to the corresponding through holes 340, so that the external serial connection unit 400 can pass through the two through holes 340 and the pipe body 330 from one through hole 340 into the housing 300 and from the other through hole 340 passes out of the housing 300. At the same time, with the tube body 330, the series connection unit 400 can be guided through the housing 300, and the series connection unit 400 can be separated from the antenna winding 100.

As shown in FIG. 4, the tube body 330 is a hollow tube body. In other embodiments, the tube body 330 may also be another structure through which the serial connection unit 400 can be guided. On one side of the tube 330, the near field communication module 200 can be positioned and configured by the groove 322. And, the separation wall 324 formed by the second housing portion 320 of the housing 300 allows the antenna winding 100 to be confined between the outer wall of the housing 300 and the separation wall 324. In addition, through the notch 326 of the partition wall 324, the antenna winding 100 can extend from the periphery and be coupled to the field communication module 200. Wherein, preferably, the gap 326 is located on the other side of the tube 330 compared to the near field communication module 200, so that the feed point of the antenna fed into the near field communication module 200 can be the same as the antenna winding 100 The surrounding direction is changed to extend farther into the bend near the near field communication module 200 to provide better antenna coupling performance and improve the sensing capability.

In the aspect illustrated in FIG. 4, the antenna winding 100 can be partially spirally stacked under the tube body 330, and the remaining part has a recessed portion that goes around the lower edge of the tube body 330 at a position adjacent to the tube body 330. 110. The lower edge of the tube body 330 may further have a lead angle, so that the recessed portion 110 can be more relaxed, reducing the required recessed depth dp as shown in FIG. 5, thereby reducing the recessed portion of the antenna winding 100 The concave area of 110 contributes to the antenna's sensing efficiency.

Next, please refer to FIG. 5, which is a schematic diagram of the structure of the antenna winding in the embodiment of FIG. 4. The antenna winding 100 of this embodiment is slightly circular. The antenna winding 100 has the aforementioned recessed portion 110, and the recessed portion 110 has a recess, and the recess is recessed downward toward the axis side (ie the surrounding central axis), that is, the two recesses of the antenna winding 100 The portion 110 is recessed in a direction opposite to the wall surface of the adjacent housing cavity. The depression depth dp of each notch may be between 0.115 and 0.125 cm, the upper notch width W1 of the notch may be about 0.25 (cm), and the lower notch width W2 of the notch may be about 0.15 (cm) . Wherein, the wire body of the antenna winding 100 may be an enameled wire insulated single core wire or other wire materials.

Next, please refer to FIG. 6, which is a schematic diagram of the near field communication device in another embodiment of the present invention. 6 is also an example of a wearable wearable device, including: a near field communication device with a slightly rectangular block-shaped housing and a serial connection unit 400 for connecting the near field communication device. The near field communication device illustrated in FIG. 6 includes a housing 500, a near field communication system including an antenna winding 100 and a near field communication module 200, and a base 510. The base 510 may be sleeved in the accommodating cavity of the housing 500, and one end of the base 510 may be provided with a connecting portion 511 for the serial connection unit 400 to be connected in series.

The base 510 includes a ring groove 512 and a matching portion 514 and a seating portion 516 disposed in the ring groove 512. As shown in FIG. 6, the ring groove 512 can be formed by the bottom wall of the base 510, the inner wall of the housing 500 on one side of the base 510, the outer wall of the matching portion 514 and the outer wall of the seating portion 516, and the other side of the base 510. The outer wall defines a structure in which the ring groove 512 surrounds the periphery of the matching portion 514 and the placement portion 516. As shown in FIG. 6, the middle part of the base 510 has partition walls separating the left and right sides of the base 510. The placement portion 516 has a positioning area defined by the through hole 518 of the base 510. The positioning area can be used for the positioning and placement of the near field communication module 200 of the near field communication system. The ring groove 512 can be used for the positioning and placement of the antenna winding (not shown) of the near field communication system. Wherein, the ring groove 512 shown in FIG. 6 is slightly rectangular. For example, it can be used for the placement of the antenna winding as shown in FIG. 3. In addition, the end of the antenna winding can step into the placement portion 516 to couple the proximity field. Communication module 200.

The matching portion 514 is used to match the weight lost by the placement portion 516 due to the arrangement of the through hole 518, so as to further maintain the base formed by the matching portion 514, the placement portion 516, and the near field communication module 200 The balance between one side and the other side (no through holes, no ribs, no near field communication module). The matching portion 514 is provided with at least one rib 5142, which is matched with the corresponding near field communication module 200. The aforementioned balance can be maintained by selectively increasing or decreasing the number or volume of the rib 5142. In addition, the protrusion The rib 5142 can also be used as a partition wall on one side of the positioning area to further assist the positioning and placement of the near field communication module 200.

Next, please refer to FIG. 7, which is an equivalent circuit diagram of the near field communication module and the antenna winding of an embodiment of the present invention. The equivalent circuit diagram includes a safety element 212 and a matching circuit. The matching circuit has a first matching capacitor 2142 connected in series with the safety element 212 and a second matching capacitor 2144 connected in parallel with the safety element 212. In order to further enable the miniaturized passive inductive passive antenna system to achieve better impedance matching between various NFC readers on the market, the capacitance of the second matching capacitor 2144 is preferably that of the first matching capacitor 2142 2.3 to 2.9 times the value. In addition, the inductance value corresponding to the winding L of the antenna winding can be 5uH~6uH. Among them, the Security Element (SE) is used to store important user information (such as credit card information, user information, etc.), which can be used in the verification process for near-end wireless payments.

The "about" refers to a configuration that has a difference degree within 2% of the stated value, and within this range "+2%~-2%".

Based on the above, the embodiment in this case illustrates the configuration that can be performed in the miniaturized near field communication system. The special configuration relationship between the antenna winding and the near field communication module can be effective in the defined narrow and small size. The sensing performance is improved, and combined with the configuration conditions of the embodiments disclosed in this case, the near field communication system disclosed in this case can be applied to near field communication devices and wearable devices to achieve a wider range of applications.

The present invention has been disclosed in a preferred embodiment above, but those skilled in the art should understand that the embodiment is only used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.

100: antenna winding 110: Depressed part 200: Near field communication module 210: Near Field Communication Chip 212: secure element 2142: first matching capacitor 2144: second matching capacitor 220: Metal carrier board 300: shell 310: The first housing part 320: second housing part 322: Groove 324: Separation Wall 326: Gap 330: tube body 340: Through hole 400: Series connection unit 500: shell 510: Pedestal 511: Connecting part 512: ring groove 514: Matching Department 5142: convex rib 516: Placement Department 518: Through hole r: radius A: Surrounding area E1: Reference plane H: stack height L: winding Z: axis θ: included angle

[Figure 1] is a schematic diagram of a near field communication system in an embodiment of the present invention. [Fig. 2] is a schematic diagram of the arrangement angle of the near field communication module of Fig. 1. [Figure 3] is a schematic diagram of the near field communication system in another embodiment of the present invention. [Figure 4] is a schematic diagram of the near field communication device in an embodiment of the present invention. [Fig. 5] is a schematic diagram of the structure of the antenna winding under the embodiment of Fig. 4. [Fig. [Figure 6] is a schematic diagram of the near field communication device in another embodiment of the present invention. [Fig. 7] is an equivalent circuit diagram of the near field communication module and the antenna winding of an embodiment of the present invention.

100: antenna winding

200: Near field communication module

210: Near Field Communication Chip

220: Metal carrier board

r: radius

A: Surrounding area

H: stack height

Z: axis

Claims (13)

A miniaturized near field communication system, comprising: an antenna winding, which is spirally stacked around an axis, has a stack height, and the area of the antenna winding on any plane of the stack height is 1.23 ( cm ² )~1.48 (cm ² ); and a near field communication module, coupled to the antenna winding and surrounded by the antenna winding, the near field communication module includes a near field communication chip and carrying the near field communication chip A metal carrier plate of, wherein the metal carrier plate is a sheet body defining a reference plane, and the angle between the normal line of the reference plane and the axis is between 60 degrees and 120 degrees. The near field communication system according to claim 1, wherein the area surrounded by the antenna winding is slightly circular, and its radius is between 0.64 (cm) and 0.65 (cm). The near field communication system according to claim 2, wherein the stack height is about 0.27 (cm) ~ 0.33 (cm). The near field communication system according to claim 1, wherein the area surrounded by the antenna winding is slightly rectangular, and its two sides are each between 1.375 (cm) ~ 1.475 (cm) and 0.9 (cm) ~ 1 ( cm). The near field communication system according to claim 4, wherein the stack height is about 0.42 (cm) to 0.48 (cm). A near field communication device, including: A shell with an accommodating cavity defined inside; A near field communication system according to any one of claims 1 to 3, which is arranged in the accommodating cavity in the housing; and A pipe body is arranged in the accommodating cavity, the wall surface of the housing includes two through holes communicating with the accommodating cavity, and both ends of the pipe body are respectively communicating with the corresponding two through holes. The near field communication device according to claim 6, wherein the antenna winding of the near field communication system is partially stacked under the tube body, and the remaining part is adjacent to the tube body and has a correspondingly bypassing the tube body. A depression on the edge. The near field communication device according to claim 7, wherein the axis of the antenna winding of the near field communication system intersects the tube body, and the near field communication module of the near field communication system is arranged in the In the accommodating cavity between the pipe body and the wall surface of the shell. The near field communication device according to any one of claims 6 to 8, wherein the housing includes a first housing part and a second housing part, the second housing part has a groove, and the groove The notch communicates with the accommodating cavity and is used for positioning and placing the near field communication module of the near field communication system. A wearable device including: A near field communication device according to any one of claims 6 to 9, wherein the housing of the near field communication device is slightly bead-shaped; A plurality of beads, each having a through hole penetrating the beads; and A serial connection unit passes through the near field communication device through the two through holes of the tube body and the shell of the near field communication device, and passes through the through holes of each bead. A near field communication device, including: A shell with an accommodating cavity defined inside; A near field communication system according to any one of claims 1 and 4 to 5, which is arranged in the accommodating cavity in the housing; and A base is configured in the accommodating cavity and used to carry the near field communication system. The base includes a ring groove, a matching portion and a seating portion arranged in the ring groove, and the seating portion has a A positioning area defined by a through hole of the base, the positioning area is for the positioning and placement of the near field communication module of the near field communication system, and the ring groove is for the antenna winding of the near field communication system Positioning and placement. The near field communication device according to claim 11, wherein the matching area has at least one rib. A wearable device including: A near field communication device according to claim 11 or 12, wherein the housing of the near field communication device is slightly rectangular in shape, and one end of the base of the near field communication device includes a connection Department; and A series connection unit is connected to the connection part in series.

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