TWM555568U - Multidirectional near filed communication transmission device - Google Patents

Description

Multi-point near field communication transmission device

The present invention relates to applications in the field of communications, and more particularly to a method and apparatus for transmitting multi-point near-field communication data with an extended transmission range.

Near Field Communication (NFC), also known as short-range wireless communication, refers to short-range high-frequency wireless communication technology. NFC has low transmission power, close communication distance, and high security. In logistics, payment, and finance. , warehousing management and other industries have a wide range of applications. With the widespread use of smartphones, functions such as mobile payment and data sharing are becoming more and more widely used. The conventional near-field communication system uses a magnetic field coupled coil method. In this coupling mode, the antenna is generally built in. However, the built-in antenna must be close to the motherboard or battery, causing the antenna to vortex on the surface of the conductor. Due to the eddy current effect, the metal piece under the antenna (which can act as a cover) induces a magnetic field, which induces an induced current, which in turn induces The magnetic field, which is opposite to the direction of the magnetic field generated by the antenna, weakens the energy generated by the antenna coil and reduces the antenna efficiency.

Devices that support NFC can exchange data in active or passive mode. In passive mode, the device that initiates NFC communication, also known as the NFC originating device (master device), provides an RF field (RF-field) throughout the communication process. It can select one of 106kbps, 212kbps or 424kbps to send data to another device. The other device, called the NFC target device, does not have to generate a radio frequency field, but uses load modulation technology to transmit data back to the initiating device at the same speed. This communication mechanism is based on non-ISO14443A, MIFARE and FeliCa The contact smart card is compatible. Therefore, in the passive mode, the NFC originating device can detect and establish contact with the contactless smart card or NFC target device by the same connection and initialization process.

In addition, when NFC is applied in the design of a highly efficient wireless charging system, the magnetic field will be displaced in the coil, and the angle between the coils has high sensitivity. When the receiving end and the transmitting end are inclined or displaced, the magnetic field is easy to occur. The lack of misalignment with the receiving coil, in addition to causing a significant drop in the efficiency of wireless charging, also limits the transmission angle of the signal, the use of front and back, angle limitations, quite inconvenient.

At present, the inconvenientity of the near-field communication in the practical application of near-field communication comes from the magnetic field damage of the near-field communication coil antenna in the metal environment. The magnetic field strength can be reinforced by the magnetic conductive material, but the cost of the magnetic conductive material is high, so how to choose the guide Magnetic materials and the 3D magnetic field distribution that reduces the magnetic field strength of the near-field communication are also an important issue.

In view of this, in order to improve this problem, the creator has designed the antenna in a material with high magnetic permeability based on the technology and experience accumulated in related industries for many years, so that the receiving device has three orthogonal directions. A magnetic field with a large magnetic flux density is generated, and a multi-directional magnetic field transmitting and receiving capability can be effectively transmitted at any angle to achieve multi-directional sensing and excellent communication effects.

The purpose of the present invention is to provide a multi-point near-field communication transmission device, the main structure comprising a printed circuit board, and a connection portion is connected to the printed circuit board, the multi-connection portion is connected to the first antenna, the next day line.

The second objective of the present invention is to provide a miniature antenna, which uses only a small space for the antenna device, because the coil conductor covered by the outer casing conductor layer does not radiate electromagnetic waves outward, so that a large space is not required. A smaller area antenna structure can be designed.

The main technical means of this creation is to use a double-layer or multi-layer printed circuit board to make a communication antenna. The material with high magnetic permeability can reduce the overall antenna even, so that the receiving device can effectively transmit and transmit at any angle. The through hole in the antenna adjusts the electromagnetic displacement distance to make the transmission distance reach the magnetic field of the maximum magnetic flux density in three orthogonal directions, thereby achieving the optimal transmission effect.

In order to achieve the above and the object, the present invention provides a multi-point near-field communication transmission device, comprising: a printed circuit board, which is provided with a plurality of through holes, and includes a first plane and a second plane corresponding to each other; The multi-point near-field communication antenna is disposed on the printed circuit board and includes a plurality of first antennas, a plurality of second antennas, and a plurality of connecting portions, wherein the plurality of first antennas are disposed on the first plane The plurality of second antennas are disposed in the second plane, and the plurality of connecting portions are disposed in the plurality of through holes, and the plurality of first antennas and the plurality of second antennas are mutually connected by the plurality of connecting portions connection.

Preferably, the printed circuit board is double or multi-layered.

Preferably, the multi-point near field communication antenna is made of a material having a high magnetic permeability coefficient.

Preferably, the plurality of first antennas provide currents in the positive X direction and the positive Y direction.

Preferably, the plurality of second antennas provide currents in a negative X direction and a negative Y direction.

Preferably, the plurality of connections provide current in the positive Z and negative Z directions.

Preferably, the multi-point near field communication transmission device is disposed in the mobile communication device

The advantages, features, and technical methods of the present invention will be more readily described with reference to the exemplary embodiments and the accompanying drawings, and the present invention can be implemented in various forms and should not be construed as being limited thereto. The embodiment described.

(1)‧‧‧Printed circuit boards

(11) ‧‧‧ first plane

(12) ‧‧‧second plane

(13)‧‧‧Tongkong

(2) ‧ ‧ multi-point near field communication antenna

(21)‧‧‧First antenna

(22)‧‧‧second antenna

(23) ‧‧‧Connecting Department

Figure 1 is a schematic view showing a first embodiment of the present creation.

Figure 2 is an exploded view of the first embodiment of the present creation.

Figure 3 is a side view of the creation.

Figure 4 is a cross-sectional view showing the first embodiment of the present creation.

Figure 5 is a cross-sectional enlarged view of the first embodiment of the present creation.

Figure 6. Schematic diagram of the top view and current direction of the creation.

Figure 7 is a cross-sectional enlarged view of a second embodiment of the present creation.

Figure 8 is a cross-sectional enlarged view of a second embodiment of the present creation.

The possible implementation of this creation is described by way of example only, and is not intended to limit the scope of the creation of the creation.

The technical means and structural features used in this creation for the purpose of creation are described in detail with reference to the preferred embodiments shown in the drawings.

The present invention discloses a multi-point near-field communication transmission device. Referring to FIG. 1 to FIG. 5, the method mainly includes: a printed circuit board (1), and includes one first plane (11) and a second plane (one) corresponding to each other ( 12), the printed circuit board (1) may be a double layer or a plurality of layers, and a double-layer or multi-layer printed circuit board is connected to a multi-point near field communication antenna (2), the multi-point near field communication antenna (2), including A first antenna (21), a second antenna (22) and a connecting portion (23) are used for the purpose of effective communication transmission at any angle.

The printed circuit board (1) is provided with a plurality of through holes (13); the first antenna (21) is connected to the printed circuit board (1), and the first antenna (21) is disposed at an L-shaped interval. On the first plane (11), one of the directions is parallel to the plane of the substrate, wherein one direction is perpendicular to the plane of the substrate, and the first antenna (21) can provide current to the negative X direction and the negative Y direction.

The second antenna (22) is disposed on the second plane (12), and the wires are arranged in an L shape on the second plane (12), wherein one direction is parallel to the second plane (12), wherein one direction Vertically connected to the second plane (12), and diagonally connected to the first antenna (21) on both sides of the printed circuit board (1), and the first day by the connecting portion (23) A magnetic conduction space is formed above and below the line (21).

The connecting portion (23) is disposed in the through hole (13), and the connecting portion (23) can be disposed on the plane of the first antenna (21) or on the printed circuit board (1) according to requirements, and The first antenna (21) is disposed in equal amounts; in this embodiment, a magnetic conductive material is used, and since the magnetic conductive material can overcome the influence of the metal environment on the magnetic field strength, the present invention utilizes the shape design of the magnetic conductive material to optimize 13.56 MHz. The near field communication magnetic field strength can be used to reduce the magnetic field strength and reduce the area of the magnetic conductive material as the environmental impact of the near field communication, which can effectively reduce the manufacturing cost.

The region below the coil conductor does not cover the magnetic material or covers a small portion of the magnetic material to reduce the ohmic loss caused by the magnetic loss of the magnetic material. Antenna device coil conductor in the area is the actual direction The part that emits or receives electromagnetic waves outside, the area under the coil conductor is covered with magnetic material or mostly covered with magnetic material to improve the electromagnetic field outward radiation effect.

During operation, a design of a magnetic conduction space is formed by the first antenna (21) and the second antenna (22). (The first antenna (21) is located below the connection portion (23), the next day The line (21) is located above the connecting portion (23), and the first antenna (21) is electrically connected to the second antenna (22) by using the through hole (13), so that the first antenna ( 21) providing current to the negative X direction and the negative Y direction, the second antenna (22) providing current to the positive X direction and the positive Y direction, and the connecting portion (23) by the multi-directional near field The communication antenna (2) provides currents in the positive Z and negative Z directions, causing the current to generate a magnetic field having a large magnetic flux density in three orthogonal directions (X, Y, Z), thereby increasing the sensing distance of the transmitting and receiving devices. Compared with the conventional device, the distance can be increased by more than 72.6%, and the coil area of the conventional transmitting end and the receiving end is reduced by more than 10% while maintaining the same sensing distance, and the multi-directional magnetic field transmitting and receiving capability is obtained.

6 to 7, in the second embodiment of the present invention, the first antenna (21) is supplied with currents in the positive X direction and the positive Y direction, and the second antenna (22) is provided to be negative. The current in the X direction and the negative Y direction, and the connection portion (23) provides currents in the positive Z and negative Z directions, thereby increasing the sensing distance of the transmitting and receiving devices to achieve multi-directional magnetic field transmitting and receiving capabilities.

The creation can generate a magnetic field with a large magnetic flux density in three orthogonal directions (X, Y, Z), and can improve the accuracy and transmission capability of the transmission and receiving devices of the field communication transmission, and is highly industrially applicable. And the technical means and its structure of its application are indeed developed by the creator. The creation of this book has met the requirements of the patent, and the application was filed according to law, and the patent right was prayed.

The embodiments described above are preferred embodiments, and the scope of the present invention cannot be limited thereto. If the equivalent changes or modifications made in accordance with the scope of the patent application and the contents of the specification are the following Patent coverage.

(1)‧‧‧Printed circuit boards

(2) ‧ ‧ multi-point near field communication antenna

Claims (7)

A multi-point near-field communication transmission device includes: a printed circuit board having a plurality of through holes and including a first plane and a second plane corresponding to each other; and a multi-point near field communication antenna And disposed on the printed circuit board, comprising a plurality of first antennas, a plurality of second antennas, and a plurality of connecting portions, wherein the plurality of first antennas are disposed on the first plane, and the plurality of second antenna systems The plurality of connecting portions are disposed in the plurality of through holes, and the plurality of first antennas and the plurality of second antennas are connected to each other by the plurality of connecting portions. The pointing device of claim 1 is directed to the near field communication transmission device, wherein the printed circuit board is double or multi-layered. The pointing device of claim 1 is directed to the near field communication transmission device, wherein the multi-directional near field communication antenna is made of a material having a high magnetic permeability coefficient. The near field communication transmission device of claim 1, wherein the plurality of first antennas provide currents in a positive X direction and a positive Y direction. The pointing to the near field communication transmission device of claim 1, wherein the plurality of second antennas provide currents in a negative X direction and a negative Y direction. The pointing device of claim 1 is directed to the near field communication transmission device, wherein the plurality of connections provide currents in the positive Z and negative Z directions. The pointing near field communication transmission device as set forth in claim 1 is provided in the mobile communication device.