CN217215076U

CN217215076U - NFC card antenna and card with low blind area reading function

Info

Publication number: CN217215076U
Application number: CN202220972238.0U
Authority: CN
Inventors: 马岩; 潘英鹤
Original assignee: Shenzhen Zhuorui Communication Technology Co ltd
Current assignee: Shenzhen Zhuorui Communication Technology Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-08-16
Anticipated expiration: 2032-04-25

Abstract

The utility model provides a NFC card antenna with low blind area to be read, which is characterized by comprising a first adhesive card, a second adhesive card, a feed line and a matching circuit; a first coil routing is arranged on the first adhesive card; a second coil wire is arranged on the second adhesive card; the first coil trace and the second coil trace are connected together in parallel; a first feeding point is arranged on the feeding wire; the tail end of the first coil routing is provided with a second feeding point; the matching circuit is electrically connected with the first feeding point and the second feeding point; the two coil wires are arranged in parallel, so that the resistance value of the coil can be reduced, and the card swiping performance is improved; further, compare in general NFC antenna card, the utility model provides a NFC antenna card is owing to the centre also has the line of walking, and the blind area part in the middle of the card becomes can be read regional, has greatly reduced the blind area that the card was read, has improved the success rate of punching the card.

Description

NFC card antenna and card with low blind area reading function

Technical Field

The utility model relates to a wireless communication field, in particular to low NFC card antenna who is read the blind area.

Background

NFC (near field Communication) is an emerging technology, devices (such as mobile phones) using the NFC technology can exchange data when they are close to each other, and is integrated and evolved from a non-contact Radio Frequency Identification (RFID) and an interconnection and interworking technology, and by integrating functions of an induction card reader, an induction card and point-to-point Communication on a single chip, applications such as mobile payment, electronic ticketing, door access, mobile identity identification, anti-counterfeiting and the like are implemented by using a mobile terminal.

At present, the use of NFC card is also more and more extensive, and the NFC card passes through NFC communication and can realize the payment fast, swipes entrance guard, takes advantage of operations such as subway, makes the life more convenient.

When the NFC card is actually used, the NFC card is attached to a signal emission area of external communication equipment, induced current is generated in an antenna of the NFC card due to the change of an external magnetic field, the induced current supplies power to an internal circuit of the card, and internal information of the card is sent to the external communication equipment to complete near field communication. However, antenna traces of the NFC card are generally located at the edge of the card, and a certain read blind area exists in the central area of the card due to small radiation, which reduces the card reading success rate, so it is very important to try to reduce the card read blind area while ensuring the size of the card.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low NFC card antenna of being read the blind area, the middle zone exists when solving present NFC card and swipes the card and is read the blind area, the problem of the inefficiency of punching the card.

In order to solve the above problem, the utility model provides a low NFC card antenna who is read blind area, which is characterized in that, including the first bonding card, the second bonding card and the matching circuit; a first coil routing is arranged on the first adhesive card; a second coil wire is arranged on the second bonding card; the first coil trace and the second coil trace are connected together in parallel; the head end of the second coil wire is connected with the feed wire; a first feeding point is arranged on the feeding wire; the tail end of the first coil routing is provided with a second feeding point; the matching circuit is electrically connected with the first feeding point and the second feeding point.

Optionally, in the NFC card antenna with a low blind area to be read, the first adhesive card and the second adhesive card are made of PVC, wood, or paper.

Optionally, in the NFC card antenna with a low blind area to be read, tracks of the first coil wire and the second coil wire have overlapped coil structures.

Optionally, in the NFC card antenna with a low blind area to be read, a gap is left between the first coil and the second coil or an insulating spacer is provided.

Optionally, in the NFC card antenna with a low blind area to be read, the end of the second coil is connected to the end of the first coil.

Optionally, in the NFC card antenna with a low blind area to be read, the NFC card antenna further includes an "L" shaped connection trace, and the head end of the first coil trace is connected to the feed trace through the connection trace.

Optionally, in the NFC card antenna with a low blind area to be read, the first feeding point and the second feeding point are adjacent to each other and a gap is left therebetween.

Optionally, in the NFC card antenna with a low blind area to be read, the tail end of the first coil trace is adjacent to the feed trace, and a gap is left between the tail end of the first coil trace and the feed trace.

Optionally, in the NFC card antenna with a low blind area to be read, the matching circuit is powered by an alternating current generated by magnetic field coupling.

The utility model also provides a card, the card contains a low NFC card antenna of being read the blind area.

The utility model has the advantages that:

the NFC card antenna consisting of the two coil wires is provided, and the two coil wires are arranged in parallel, so that the resistance value of the coils can be reduced, and the card swiping performance is improved; further, compare in general NFC antenna card, the utility model provides a NFC antenna card is owing to the centre also has the line of walking, and the blind area part in the middle of the card becomes can be read regional, has greatly reduced the blind area that the card was read, has improved the success rate of punching the card.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an overall structure diagram of an NFC card antenna with a low blind area to be read according to this embodiment;

fig. 2 is a layered structure diagram of an NFC card antenna with a low blind area to be read according to this embodiment;

fig. 3 is a cross-sectional view of an NFC card antenna with a low blind spot to be read according to this embodiment;

fig. 4 is an overall structural view of a conventional NFC card antenna;

fig. 5 is a magnetic field strength simulation diagram of a conventional NFC card antenna;

fig. 6 is a magnetic field strength simulation diagram of an NFC card antenna with a low blind area to be read according to this embodiment;

wherein the reference numerals are as follows:

100-a first adhesive card; 101-a first coil trace; 102-a feed-line; 104-a first feeding point; 105-a second feeding point; 200-a second adhesive card; 201-second coil trace; 202-connecting wires; 300-matching circuit.

Detailed Description

The following describes the NFC card antenna with a low blind area to be read in further detail with reference to the accompanying drawings and specific embodiments. It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present invention, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that "first", "second", etc. in the description and claims of the present invention and the accompanying drawings are used for distinguishing similar objects so as to describe the embodiments of the present invention, and are not used for describing a specific order or sequence, and it should be understood that structures used in this way may be interchanged under appropriate circumstances. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The utility model provides a walk NFC card antenna that line is constituteed by two coils, two coils are walked the parallelly connected setting of line, can reduce the resistance of coil, promote the performance of punching the card.

Fig. 1 is an overall structure diagram of an NFC card antenna with a low blind area to be read according to this embodiment, as shown in fig. 1, a trace of the NFC card antenna includes the first coil trace 101 and the second coil trace 201, and the first coil trace 101 and the second coil trace 201 have an overlapped partial coil structure; the NFC card antenna further includes the first feeding point 104, the second feeding point 105, and the matching circuit 300, where the first feeding point 104 and the second feeding point 105 are adjacent to each other with a gap left therebetween, and the matching circuit 300 is electrically connected to the first feeding point 104 and the second feeding point 105.

Specifically, the first coil wire 101 and the second coil wire 201 are connected in parallel, so that the resistance value of the coil can be reduced, and the card swiping performance is improved.

Further, during operation, the external communication device emits a variable magnetic field, and generates an alternating current in the first coil trace 101 and the second coil trace 201 through magnetic field coupling, where the alternating current supplies power to the matching circuit 300, and sends information to the external communication device through magnetic field coupling, thereby completing information interaction.

Fig. 2 is a layered structure diagram of an NFC card antenna with a low blind area to be read according to this embodiment, where the NFC card antenna provided by this embodiment is formed by bonding the first bonded card 100 and the second bonded card 200, and as shown in fig. 2, the first bonded card 100 is provided with the first coil trace 101 and the feed trace 102; the second coil trace 201 and the connection trace 202 are arranged on the second adhesive card 200; the head end of the first coil trace 101 is connected to the feed trace 102 through the connection trace 202; the head end of the second coil trace 201 is connected to the feed trace 102; the tail end of the second coil wire 201 is connected with the tail end of the first coil wire 101; the first feeding point 104 is disposed on the feeding trace 102; the second feeding point 105 is disposed at the end of the first coil trace 101; the matching circuit 300 is electrically connected to the first feeding point 104 and the second feeding point 105, and thus, the first coil trace 101 and the second coil trace 201 are connected in parallel, and can get power through the matching circuit 300 and the first feeding point 104 and the second feeding point 105.

Fig. 3 is a cross-sectional view of an NFC card antenna with a low blind area to be read provided in this embodiment, as shown in fig. 2, the first coil trace 101 and the second coil trace 201 are located inside the card, a gap is left between the first coil trace 101 and the second coil trace 201 to reduce electromagnetic interference therebetween, and an insulating spacer may also be added to reduce electromagnetic interference.

Fig. 4 is the overall structure diagram of traditional NFC card antenna, and it can be seen from the diagram that traditional NFC card antenna only has the coil to walk the line around the card to because the coil is walked the line singlely, the resistance is also great, and NFC card antenna's performance often can receive the restriction.

Fig. 5 is a magnetic field intensity simulation diagram of a conventional NFC card antenna, in which a dark region is a region with strong magnetic field distribution, and a light region is a region with weak magnetic field distribution.

Fig. 6 is a magnetic field intensity simulation diagram of an NFC card antenna with a low read blind area provided by this embodiment, a dark color area part in the diagram is a region with strong magnetic field distribution, a light color area part is a region with weak magnetic field distribution, as can be seen from the diagram, the NFC card antenna provided by this embodiment has a coil in the middle of the card to run, therefore, the magnetic field intensity in the middle of the card is also strong, only the magnetic field intensity in the areas on the two sides of the middle coil running is weak, and during actual operation, because of swiping a card, the reading device of the NFC card also has a magnetic induction area, this area is often greater than the region with weak magnetic field intensity of the NFC card antenna provided by this embodiment, therefore, this part is read the blind area and generally does not affect the actual card swiping performance, and the card swiping efficiency and the use experience of the NFC card antenna are greatly improved.

In summary, the present embodiment provides an NFC card antenna with a low blind area to be read, which is characterized in that the NFC card antenna includes a first adhesive card, a second adhesive card, and a matching circuit; the first bonding card is provided with a first coil wire and a feed wire; the second bonding card is provided with a second coil wire and a connecting wire; the head end of the first coil wire is connected with the feed wire through the connecting wire; the head end of the second coil wire is connected with the feed wire; the tail end of the second coil is connected with the tail end of the first coil wire; a first feeding point is arranged on the feeding wire; the tail end of the first coil routing is provided with a second feeding point; the matching circuit is electrically connected with the first feeding point and the second feeding point; the two coil wires are arranged in parallel, so that the resistance value of the coil can be reduced, and the card swiping performance is improved; further, compare in general NFC antenna card, the NFC antenna card that this embodiment provided also has the line owing to the centre, and the blind area part in the middle of the card becomes can be read regional, very big reduction the blind area that the card was read, improved the success rate of punching the card.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. An NFC card antenna with a low read blind area is characterized by comprising a first adhesive card, a second adhesive card, a feed line and a matching circuit; a first coil routing is arranged on the first adhesive card; a second coil wire is arranged on the second bonding card; the first coil trace and the second coil trace are connected together in parallel; the head end of the second coil wire is connected with the feed wire; a first feeding point is arranged on the feeding wire; the tail end of the first coil routing is provided with a second feeding point; the matching circuit is electrically connected with the first feeding point and the second feeding point.

2. The NFC card antenna with low blind area to be read according to claim 1, wherein the first adhesive card and the second adhesive card are made of PVC or wood or paper materials.

3. The NFC card antenna with low blind area to be read according to claim 1, wherein the tracks of the first coil trace and the second coil trace have an overlapping coil structure.

4. The NFC card antenna with low blind area to be read according to claim 1, wherein a gap is left between the first coil and the second coil or an insulating spacer is arranged between the first coil and the second coil.

5. The NFC card antenna with low blind area to be read according to claim 1, wherein the end of the second coil is connected to the end of the first coil trace.

6. The NFC card antenna with low blind area to be read according to claim 1, further comprising an "L" shaped connection trace, wherein the head end of the first coil trace is connected to the feed trace through the connection trace.

7. The NFC card antenna with low blind area to be read according to claim 1, wherein the first feed point and the second feed point are adjacent to each other with a gap in between.

8. The NFC card antenna with low blind area to be read according to claim 1, wherein the end of the first coil trace is adjacent to the feed trace with a gap.

9. An NFC card antenna with low blind spot to be read according to claim 1 wherein the matching circuit is powered by alternating current generated by magnetic field coupling.

10. A card comprising an NFC card antenna with a low blind area to be read according to any of claims 1 to 9.