KR20160128862A - Shielding unit for complex-antenna unit and complex-transmission module comprising the same - Google Patents

Abstract

The present invention relates to a shielding unit for a complex antenna unit and a complex transmission module comprising the same and, more specifically, to a shielding unit for a complex antenna unit, for improving antenna properties and blocking the effects of a magnetic field influencing a main body and a battery of a portable terminal device or the like at the same time, and a complex transmission module comprising the same. The shielding unit for a complex antenna unit induces the magnetic field with respect to magnetic security transmission (MST) and near-field wireless communication (NFC).

Description

TECHNICAL FIELD [0001] The present invention relates to a shielding unit for a composite antenna unit and a composite transmission module including the shielding unit and a complex-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielding unit for a composite antenna unit and a composite transmission module including the same, and more particularly, to a shielding unit for a composite antenna unit, And a composite transmission module including the same.

Generally, an antenna is a device that converts an electric signal into a radio wave signal, and can be classified into a dielectric antenna using dielectric characteristics and a magnetic antenna using magnetic properties. All antennas can be used in various areas, but their efficiency depends on their shape and structure. In the past, studies on dielectric antennas using high-permittivity materials have been actively conducted. However, researches on magnetic materials having a high magnetic permeability in a conventional high-permittivity material have been conducted as a result of an increase in the performance degradation of antennas due to the use of higher frequencies. (NFC), Magnetic Security Transmission (MST) and Magnetic Security Transmission (MST) through various portable terminals (smart phone, tablet PC, etc.) utilizing these antennas. Attempts to combine functions continue.

First, the short-range wireless communication (NFC) is a non-contact type short-range wireless communication module using 13.56Mz frequency band as one of the RFID tags, which is a technology for transmitting data between terminals at a distance of 10cm. NFC is widely used not only for mobile payments, but also for transferring travel information, transportation, and access control locks for goods information and visitors in supermarkets and general shops, as well as for file transfer.

In addition, recently announced by Google, 'Android Beam' included in the smart phone is a near-field wireless communication (NFC) -based short distance information transmission and reception function that not only allows mobile payment but also photo, business card, file, map, Korean Patent Laid-Open Publication No. 2015-001754 discloses an NFC tag-based content sharing method and an NFC gateway for the same.

Next, the Magnetic Security Transfer (MST) (Point Of Sale) terminal capable of reading information of a magnetic card and a magnetic card, which are universal payment means. In recent years, an attempt has been made to adopt the technology in a smart phone Is continuing.

Methods using a 2D bar code or NFC (Near Field Communication) as a payment method using a conventional smart phone have been proposed. However, since the 2D bar code or NFC payment means is not suitable for a POS terminal, universal application is difficult In particular, in the case of NFC, the standardized NFC performance is lacking in many smartphones, and a separate device for reading the NFC performance has to be provided.

However, in order to transmit the magnetic information to the POS terminal through the smart phone instead of the conventional magnetic card while using the POS terminal generally used in the conventional shops or the like, the MST for forming the magnetic field by interaction with the POS terminal It is required to develop a component for transmission of magnetic security such as an antenna.

Meanwhile, the near field wireless communication (NFC) and the magnetic security transmission (MST) as described above commonly use the electromagnetic field energy generated from the antenna, and wireless communication or transmission is possible through the transmission / reception unit.

However, these technologies have limitations on the " transmission / reception distance of electromagnetic field energy " as opposed to what is expected to bring incredible convenience to the user. In order to overcome the limitation of the transmission / reception distance, electromagnetic field energy, for example, do. That is, since the induced electromotive force induced in the helical coil type loop antenna is determined by Faraday's law and Lenz's law, in order to obtain a high voltage signal, the secondary coil (antenna coil) The more the amount of the water is, the more advantageous it is. The amount of magnetic flux increases as the amount of soft magnetic material contained in the secondary coil increases and as the permeability of the material increases.

The portable terminal having such a secondary coil necessarily has a magnetic shielding sheet due to the deterioration of functions of other parts included in the terminal due to the magnetic field and / or the harmful effect of the human body due to the magnetic field .

The magnetic shield sheet serves to isolate other components in the portable terminal from the magnetic field, and at the same time, it can induce the concentration of the magnetic field between the transmitter and receiver sections, thereby improving the transmission / reception communication and preventing the deterioration of functions of other components due to the magnetic field.

The higher the magnetic permeability, the better the transmission / reception performance. The magnetic permeability is determined by the saturation magnetization value (Ms) of the magnetic material and the microstructure of the material depending on the material. On the other hand, the material of the magnetic material determines the saturation magnetization value and the limit frequency can be determined accordingly. That is, even a magnetic shielding sheet having a high magnetic permeability can not be used in accordance with a desired frequency band, and even when used, it is difficult to reduce the amount of material, that is, the thickness .

However, the shielding sheet having a large thickness is contrary to the current trend of slimming down the portable terminal device itself, and it is difficult to adopt a slimmer terminal, and it is difficult to realize a desired communication strength even if the thickness is increased.

In addition, when a combination of a short-range wireless communication (NFC) and a wireless power transmission (WPT) function in which frequency band ranges to be used may be different from each other in a single portable terminal device, the use of a shielding sheet There is a problem that it is very difficult to maintain or improve only one function of each of the complex functions and simultaneously maintain or improve other functions beyond the limit frequency band.

Accordingly, a magnetic shielding sheet capable of remarkably improving the characteristics of the antenna of each of the composite antennas at the same time, being thinned to meet the slimming trend of the portable terminal, and exhibiting the basic physical properties required for the magnetic shielding sheet Is urgent.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an antenna unit in which a plurality of antennas having different frequency domains are used, And is capable of significantly exhibiting the basic physical properties required for the magnetic shielding sheet.

Further, the present invention can significantly improve the antenna characteristics even when the antennas having different frequency domain ranges are complexed through the shielding unit for a complex antenna unit according to the present invention, and as a result, Module, a mobile device including the same, a smart home appliance, and a device for the Internet of Things.

According to an aspect of the present invention, there is provided a shielding unit for a composite antenna unit that induces a magnetic field in accordance with magnetic security transmission (MST) and short-range wireless communication (NFC) And a first magnetic shield member comprising at least one selected from the group consisting of Mg-Cu-Zn ferrite and Ni-Mg-Cu-Zn ferrite, Provide a unit.

The shielding unit may further include a second magnetic shielding member made of a material different from the first magnetic shielding member, and the second magnetic shielding member may include a plurality of magnetic flakes.

According to a preferred embodiment of the present invention, any one of the plurality of magnetic flakes may have a space separated from the adjacent other ones.

In addition, all or a part of the spaced space may be filled with an eddy current brake material.

The plurality of magnetic flakes may be derived from an amorphous ribbon sheet, and the amorphous ribbon sheet may include at least one selected from an amorphous alloy and a nanocrystalline alloy.

In addition, the amorphous alloy may include silicon-based steel.

The magnetic flakes may have an average particle diameter of 1 to 5 mm and may have an irregular shape.

Further, the eddy current braking material may be an insulating adhesive or a thermally conductive heat-insulating adhesive.

The first magnetic shield member may include a single layer member; Or a multilayer member in which a plurality of first magnetic shield members are stacked, wherein the multilayer member may be a laminate of three to ten first magnetic shield members, and the first magnetic shield member may be a multilayer member It is possible to further include an insulating adhesive layer or a thermally conductive heat-releasing adhesive layer interposed between the respective first magnetic-field shielding members.

According to another aspect of the present invention, there is provided a wireless communication system including: a composite antenna unit including an antenna for a magnetic security transmission (MST) and an antenna for a short-range wireless communication (NFC); And a shielding unit according to the present invention, which is disposed on one surface of the composite antenna unit to induce a magnetic field and improve antenna characteristics.

According to a preferred embodiment of the present invention, the inductor constituting the MST antenna comprises a loop having at least one winding, and the inductor is a magnetic field diffused over a region corresponding to the sensing opening of the magnetic reader head, . ≪ / RTI >

In addition, the inductor may be made of a material which is not saturated under the current flowing through the inductor.

The ratio of the inductance to the inductance of the inductor may be 10 μH / Ω to 80 μH / Ω.

Also, the area formed by the loop may be 600 to 1700 mm < 2 >.

In addition, the antennas for magnetic security transmission and the antennas for short-range wireless communication may be spaced apart from each other.

In order to solve the above-described problems, the present invention provides a mobile device, a smart home appliance, and an Internet of Things device including the composite transmission module according to the present invention.

Hereinafter, terms used in the present invention will be described.

The term "formed on one surface" or "formed on a layer" of the specific layer as used in the present invention means that the layer formed directly opposite to the specific layer or indirectly formed after one or more other layers are inserted For example, in the case of "B layer formed on one surface of the A layer", the A layer and the B layer face each other, or a third C layer is formed on the A layer, and then a B layer is formed on the C layer .

The term "member" used in the present invention means to include both a sheet, a film, and a plate unless the form thereof is mentioned separately. For example, , A shielding film, and a shielding plate.

The shielding unit for a composite antenna unit according to a preferred embodiment of the present invention significantly improves the characteristics of the antenna at the same time in the antenna unit in which a plurality of antennas having different frequency ranges are used, It is possible to remarkably exhibit the basic physical properties required for the magnetic-shielding sheet despite its being thinned.

In addition, in the case of the composite transmission module including the shielding unit for a composite antenna unit, since each of the individual antennas exhibits significantly improved antenna characteristics, the communication strength for transmission and reception is improved, Charging or payment proceeding can smoothly be performed.

Furthermore, the module realized through the thinned shielding unit and the electronic device including the module itself can be made slim and can be widely used as a product which meets the needs of the consumer in recent years.

1 is a perspective view schematically showing a composite transmission module according to a preferred embodiment of the present invention.
2 is a cross-sectional schematic diagram of a first magnetic shield member according to a preferred embodiment of the present invention.
3 is a cross-sectional schematic diagram of a shielding unit according to a preferred embodiment of the present invention.
4 is a cross-sectional schematic diagram of a first magnetic shield member according to a preferred embodiment of the present invention.
5 is a cross-sectional view of a shielding unit according to a preferred embodiment of the present invention.
6 and 7 are schematic views showing a flake device used in a preferred embodiment of the present invention.
8 is a schematic view of a compression device used in a preferred embodiment of the present invention.
9 and 10 are cross-sectional views of a shielding sheet before fabricating a first magnetic shield member according to a preferred embodiment of the present invention.
13 and 14 are sectional views of a magnetic shielding unit according to a preferred embodiment of the present invention.
FIG. 15 is a use state diagram of a portable electronic device having a magnetic security transmission module according to an embodiment of the present invention.
14 is a schematic block diagram for explaining the operation of FIG.
15 is a plan view of an antenna for a magnetic security transmission (MST) included in a composite antenna unit according to a preferred embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

As described above, even if a magnetic shielding sheet having a high magnetic permeability is used, there are cases where it can not be used according to a desired frequency band. Even if it is used, the amount of material, that is, the thickness of the material must be remarkably increased . In addition, the shielding sheet having a large thickness is contrary to the present trend in which the portable terminal itself is slim, and it is difficult to adopt a slimmer terminal, and it is difficult to realize the desired communication strength even if the thickness is increased.

Specifically, ferrite magnetic shielding sheets have been widely used in conventional short range wireless communication (NCF). The ferrite magnetic material has a resistivity of 10 ⁶ or more as compared with a metal magnetic material and has a low eddy current loss and has been used as a suitable material in a high frequency region since a constant magnetic permeability and low electrical characteristics are exhibited to a high frequency region. However, the ferrite magnetic material has a frequency range of 10 to 10 ⁴ MHz (which may vary depending on the specific microstructure) at which the initial permeability can be obtained, whereas the frequency range mainly used in magnetic security transmission (MST) Considering that the range is 400 kHz or less, the ferrite material itself has a limitation of the limit frequency band band, and therefore, in the frequency band used for the MST, each of the antennas using different frequency band bands is complex There is a problem in that the antenna unit can not realize desired physical properties such as antenna characteristics at the same time. In order to improve the physical properties, when the thickness of the ferrite sheet is increased, a thinned shielding member having a desired thickness can not be realized .

In order to improve the antenna characteristics for each of the antennas using the different frequency band from different viewpoints, it is necessary to select a material suitable for each antenna use frequency in consideration of the limit frequency of the shielding sheet material, Which is different from the thickness of the shielding sheet. In consideration of the recent slimmer portable terminal equipment, it has been contradictory to the thinning and complicated manufacturing process, resulting in a problem of lowering productivity.

Further, permanent magnets are usually provided in the transmitting part and / or the receiving part to prevent leaked magnetic fluxes for enhancing the communication strength between the transmitting and receiving parts. The DC magnetic field generated by the permanent magnet exerts a greater influence on the magnetic shielding sheet than the alternating magnetic field. Shielding sheet made of a ferrite material is easily magnetized by the permanent magnet, that is, magnetically saturated by the permanent magnet, so that it behaves like a shielding sheet made of a material having a remarkably low permeability, and thus acts as a desired magnetic shielding sheet There is a problem that can not be performed.

Furthermore, since the direction of the spin arranged by the permanent magnet is opposite to the direction of the magnetic flux of the alternating magnetic field due to the antenna, when the magnetic sheet is canceled and the magnetic permeability is high, for example, a ferrite sheet, There is a problem in that it is impossible to obtain the desired physical properties such as lowering the communication strength remarkably between the transmitting and receiving parts.

In addition, since the conventional ferrite shielding sheet is subjected to a high-temperature firing process at the time of manufacturing, the shielding sheet may be bent to cause shape deformation, which makes it difficult to produce a desired shielding sheet.

Accordingly, the present invention provides a shielding unit for a composite antenna unit that induces a magnetic field in accordance with magnetic security transmission (MST) and short-range wireless communication (NFC) Zn ferrite, and Ni-Mg-Cu-Zn ferrite. The present invention also provides a shielding unit for a composite antenna unit, comprising: a first magnetic shielding member including at least one member selected from the group consisting of Zn- I tried to solve it.

This makes it possible to simultaneously support a wide range of frequency band from an antenna using a low frequency band of kHz to an antenna using a high frequency band of MHz and to a permanent magnet provided for aligning a magnetic flux, As the magnetic flux decreases and the communication strength between the transmitting and receiving parts is maintained or improved, the antenna characteristic can be remarkably improved. Also, even if the antenna is thinned and thinned, it is very suitable for portable terminals having a tendency to be slim.

1 is a perspective view schematically showing a composite transmission module according to a preferred embodiment of the present invention. The composite transmission module 100 includes a composite antenna unit 110 and a shielding unit 120.

First, a shielding unit 120 for a composite antenna unit that induces a magnetic field in accordance with magnetic security transmission (MST) and short-range wireless communication (NFC) will be described.

The shielding unit 120 may include at least one member selected from the group consisting of Mg-Cu-Zn ferrite and Ni-Mg-Cu-Zn ferrite in order to simultaneously improve the antenna characteristics of the composite antenna unit And a first magnetic shield member.

At this time, at least one selected from the group consisting of Mg-Cu-Zn ferrite and Ni-Mg-Cu-Zn ferrite is a material having both electromagnetic shielding property and heat radiation property and having a predetermined mechanical strength It is possible to simultaneously exhibit remarkably excellent antenna characteristics such as a magnetic flux density phenomenon through a synergistic action with the first magnetic shield member in the antenna characteristic of the antenna unit in which the antennas having different frequency bands are different from each other, It is not easily magnetized to the permanent magnet provided for aligning the magnetic field in the portion, so that the intended physical properties can be fully expressed.

Further, at least one selected from the group consisting of Mg-Cu-Zn ferrites and Ni-Mg-Cu-Zn ferrites can be produced at a lower temperature than that of ferrites produced by conventional high temperature calcination ) Since the dense and uniform microstructure can attain an excellent permeability, the shielding sheet manufactured through such a method does not cause a problem of bending as in the case of manufacturing at high temperature, There is an advantage of this.

Furthermore, at least one selected from the group consisting of Mg-Cu-Zn ferrite and Ni-Mg-Cu-Zn ferrite can attain a high permeability even at a thin thickness, There is an advantage that it is easy to manufacture a light-weight shortened product suitable for current electronic device development trend. Also, it has a superior super permeability in a wide range of frequency band as compared with the conventional ferrite material, and each antenna using a different frequency band is applied to a composite antenna unit, thereby realizing desired physical properties.

The shape of the first shielding member may be a shape of a shielding unit known in the art, and may be a polygonal shape, a circle shape, an elliptical shape, a donut shape, and the like. May be the same as or different from the shielding member. The thickness of the second shielding member may be designed differently according to the purpose, and is not particularly limited in the present invention, but may be 0.01 탆 to 1 mm.

Meanwhile, the magnetic-field-shielding unit according to a preferred embodiment of the present invention may further include a second magnetic-field-shielding member in addition to the first magnetic-field-shielding member. The second magnetic shield member may be a shield member including a magnetic material different in material and / or microstructure from the magnetic material included in the first magnetic shield member. Preferably, the second magnetic shield member may include a magnetic body including a plurality of magnetic body flakes.

2 and 3 are cross-sectional schematic views of a second magnetic shield member 9 according to a preferred embodiment of the present invention, including a plurality of magnetic flakes as shown in the schematic view of FIG. 2, The plurality of magnetic flakes 2 may be spaced apart from the magnetic flakes and may have an empty space 4 that does not include the magnetic flakes 2, 3, as shown in Fig. 3 (b).

2, the second magnetic-field-shielding member 120 'may include a first magnetic-field-shielding member (or a second magnetic-field-shielding member) 121a, 121b, and 121c may be a multi-layered member.

It is preferable that the second magnetic-field shielding member is a multilayer member composed of a plurality of layers rather than a monolayer member in terms of physical properties, and more preferably, the first magnetic-field shielding member of a single layer is a multilayer member composed of three to ten layers If the layer is stacked less than three layers, the desired physical properties may be deteriorated. If the number of layers is more than ten, there may be a problem that the shielding unit may be reduced in thickness.

In the case where the second magnetic-field shielding member is a multilayered member having a plurality of layers, an insulating adhesive layer 121d or a thermally conductive heat-dissipating adhesive layer (not shown) may be interposed between the respective single-layered second magnetic-field shielding members 121a, 121b, 121d.

The thickness of the second magnetic shield member may be the thickness of a conventional shield member, and is preferably, but not limited to, 0.01 μm to 1 mm. The shape may be employed without limitation in the case of a conventional shielding member shape, and may be polygonal, circular, elliptical, donut, and the like, but is not limited thereto.

Hereinafter, the configuration of the second magnetic-field shielding member will be described in more detail.

As shown in FIG. 2, the second magnetic shield member includes a plurality of magnetic substance flakes 2. The shielding unit including the first magnetic-field shielding member typically has a role of inducing a magnetic field to block the influence of the electromagnetic wave signal generated from the first antenna (primary coil) installed in the transmitter (and / or the receiver) And at the same time, serves as an inductor that induces the electromagnetic wave signal to be received at a second antenna (secondary coil) provided in the portable terminal with high sensitivity. However, the magnetic flux density of the received magnetic field is lowered depending on the material of the shielding unit, specifically, the material and the microstructure of the second magnetic shield member, and more specifically, the loss due to the hysteresis, the eddy current loss, The first magnetic shield member according to the present invention may include a plurality of flaked magnetic bodies so that the decrease of the magnetoresistance R is reduced by the residual loss of the first magnetic shield member And the quality factor of NFC communication, WPT transmission, and MST transmission is increased, and the efficiency of each communication and transmission can be remarkably increased.

In addition, since the magnetic body is provided with a plurality of flakes, loss due to the eddy current can be reduced and the magnetic flux density can be further prevented from being lowered. In addition, a problem of heat generation due to the eddy current There is an advantage to be able to block.

Furthermore, since one of the plurality of magnetic flakes is provided apart from the adjacent other flakes, the size of the flaked magnetic body is increased as the magnetic bodies are directly contacted with each other, thereby preventing an increase in eddy current loss.

In addition, the space separated between the magnetic flakes has an advantage of permanently shielding the direct contact or electrical connection between the magnetic flakes as the eddy current braking material is filled, thereby preventing the magnetic flux density from decreasing due to eddy currents.

The shape of the magnetic flakes is irregular, and there is no limitation on the specific shape. Preferably, the particle size of the flakes can be controlled with an average particle size of the magnetic substance flakes of 1 to 5 mm, preferably an average particle size of 10 to 3 mm, more preferably an average particle size of 10 to 1 mm. By reducing the flake diameter of the magnetic body, the half-magnetic field can be increased to eliminate the loss due to the hysteresis to increase the uniformity of the magnetic permeability, and to prevent the heat generation problem caused by the eddy current generated by the alternating magnetic field have.

The magnetic flakes may be flaked in an amorphous ribbon sheet, and the amorphous ribbon sheet may include at least one selected from an amorphous alloy and a nanocrystalline alloy. The saturation magnetization value (Ms) This larger amorphous alloy may be more desirable. The amorphous ribbon sheet may have a thickness of 0.01 to 60 탆, but the amorphous ribbon sheet may have a different thickness depending on the manufacturing method and purpose. More preferably, the amorphous alloy may include silicon-based steel to exhibit improved physical properties.

The microstructure of the magnetic body is one of the factors for determining the magnetic permeability. The silicon steel may have a microstructure of 20% or more in the area ratio of the structure and 50 nm or less in the grain size, more preferably 5 to 30 nm Is present in the alloy structure in an area ratio of 50% to 90%.

The silicon-based steel may preferably include an Fe-Si-B alloy, an Fe-Si-B-Co alloy, and an Fe-Si-B-Cu-Nb alloy.

More specifically, the Fe-Si-B alloy has a high saturation magnetic flux density, but when the content of the Fe element is excessive, it is difficult to form amorphous. Therefore, in the present invention, the Fe content is 70 to 90 atomic% .

When the sum of Si and B is in the range of 10 to 30 atomic%, the amorphous formability of the alloy is the most excellent. In order to prevent corrosion in such a basic composition, corrosion resistance elements such as Cr and Co may be added in an amount of 20 atomic% or less, and a small amount of other metal elements may be added as needed to impart different properties. For example, the Fe-Si-B alloy may have a crystallization temperature of 508 占 폚 and a Curie temperature (Tc) of 399 占 폚. However, such a crystallization temperature can be varied depending on the content of Si and B, or other metal elements added in addition to the ternary alloy component and its content.

In this case, the Fe content is preferably 73 to 80 atomic%, the sum of Si and B is 15 to 26 atomic%, the sum of Cu and Nb is 1 to 5 atomic %.

Next, the eddy current braking material 5 which is filled in the spacing space between the plurality of magnetic substance flakes 2 constituting the first magnetic-field shielding member to separate the flakes will be described.

The eddy current braking material is filled in the spacing space between the flakes to prevent direct contact of the flakes with each other to prevent the increase of the flake size and the increase of the eddy current loss. In addition, as the generated eddy current generates heat, the reduction of the eddy current has an advantage of reducing heat generation. Further, when the spacing space between the magnetic flakes is left as an empty space, moisture can penetrate into the gap, and the penetration of moisture causes oxidation of the amorphous ribbon, resulting in deterioration of the shielding performance and defective appearance Eddy current braking materials have the advantage of blocking moisture penetration.

The eddy current braking material may be an insulating adhesive or a thermally conductive heat insulating adhesive. In the case of an insulating adhesive, an ordinary insulating adhesive component used in the art can be used without limitation, and a deformable adhesive can be used at room temperature. A thermoplastic adhesive that is deformed when it is applied can be used. As a non-limiting example, a polymer resin containing at least one selected from wax, epoxy resin, melamine resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA) have.

In addition, the thermally conductive heat-insulating adhesive may fill the space between the flakes to separate the flakes, and at the same time, may function to release heat generated according to eddy currents. The conventional wireless power transmission module or the near field communication module further includes a heat dissipation unit on the upper or lower portion of the magnetic shield member. If a heat conductive heat dissipation adhesive is used as the eddy current braking material, the heat dissipation unit It is possible to omit or reduce the thickness of the heat-dissipating unit, which is advantageous for slimming the composite transmission module. The thermally conductive heat-radiating adhesive may be formed by providing a thermally conductive heat-radiating filler in the insulating adhesive. The thermally conductive heat-radiating filler may be a filler known in the art, and is not particularly limited in the present invention.

The magnetic field shielding unit 10 according to a preferred embodiment of the present invention includes the protection member 1, the release member 3 and the adhesive member 5 on one or both surfaces of the first magnetic shield member 9, And at least one member selected from the group consisting of: 3 and 5 are cross-sectional views of a shielding unit according to a preferred embodiment of the present invention. Fig. 3 shows a protective member 1 or a release member 3 formed on the top of the first magnetic shield member 9 , And a magnetic shielding unit in which an adhesive member (5) is formed at a lower portion and a release member (3) is formed at a lower portion of the adhesive member (5). 5 shows an example in which the adhesive member 5 is formed on both surfaces of the first magnetic shield member 9 and the protective member 1 or the release member 3 is formed and the release member 3 is formed on the lower portion of the adhesive member 5. [ The adhesive member 5 may be the same or different from the eddy current braking material described above. In the case of the same material, the adhesive material may be formed at one time in the manufacturing process, which will be described later, There is an advantage.

The protective member 1 may be made of, for example, a polyethylene terephthalate (PET) film, a polyimide film, a polyester film, a polyphenyl linseed paste (PPS) film, a polypropylene A resin film such as a fluororesin film may be used, and the thickness may be a usual thickness, preferably 1 to 200 mu m, but is not limited thereto.

The release member can be used without limitation in the case of a usual release member, and the thickness is not limited in the case of a normal thickness. The adhesive member 5 may be an adhesive member having adhesive components disposed on only one surface of a normal adhesive member, or an adhesive member having adhesive components disposed on both surfaces thereof. The adhesive member may be a conventional adhesive member, and preferably the same component as the eddy current braking material, but is not limited thereto. The thickness of the adhesive member may be designed differently depending on the purpose, and may be 0.01 탆 to 1 mm, but is not particularly limited in the present invention.

The first magnetic shield member described above can be manufactured through the following method, but is not limited thereto.

Specifically, the outer surface of the magnetic body is coated with an eddy current braking material to form a coating layer. Forming a protective layer outside the coating layer; And applying a pressure to the magnetic body to flake the magnetic body. Further, it is possible to further carry out a step of compressing after the flake processing step, and further, after the compressing step, it is also possible to carry out the production in the form of a sheet or a film. (First Manufacturing Method)

Further, the magnetic shielding heat radiation member of the present invention comprises the steps of: forming a laminated sheet by attaching a double-sided tape having a protective film and a release film on both sides of a magnetic sheet; Applying pressure to the laminated sheet to produce a laminated sheet including magnetic flakes; And laminating the laminated sheet including the magnetic flakes to planarize and slim the laminated sheet. The double-sided tape may include an eddy current braking material as an adhesive on both sides of the tape. (Second Manufacturing Method)

In a preferred method of manufacturing the magnetic shielding heat radiation member of the present invention, the step of applying the pressure in the first manufacturing method to treat the flake or the step of manufacturing the laminated sheet including the magnetic flake in the second manufacturing method includes the steps of The magnetic material can be made flaky by using the flake device shown in Fig.

6, the first flake device 20 includes a metal roller 21 having a plurality of protrusions 21a formed on the outer surface thereof, a rubber roller 25 disposed opposite to the metal roller 21, 7, the second flake device 30 includes a metal roller 31 on which a plurality of spherical balls 31a are mounted, and a metal roller 31 disposed opposite to the metal roller 31 on the outer surface thereof And a rubber roller 35 which is made of a rubber material.

Further, a laminate sheet (FIG. 11) of a magnetic body coated with a sheet (FIG. 9) coated with an eddy current braking material sealed with the protective film or a eddy current braking material sealed with a protective film (FIG. 11) The magnetic substance can be flaked by passing through the second flake device. Then, the flake device can be flaked to a desired size by passing a plurality of flake devices. At this time, the plurality of separated flakes are kept separated through the double-faced tape adhered to both sides.

Further, during the flake treatment, the eddy current braking material coated or the eddy current braking material present on the double-sided tape is filled in the spaced apart spaces (4 in Fig. 1) existing between the flakes through the pressure applied during the flake treatment, Thereby exhibiting the desired physical properties.

In addition, in the process of compressing after flake treatment in Manufacturing Method 1, or the process of flattening and slimming in Manufacturing Method 2, it is necessary not only to minimize the spaced space existing between flakes, to fill the space where eddy current braking material is spaced apart, For example, to induce the flakes to exist in the male-like direction so that the heat dissipation occurs well in the horizontal direction. For example, the apparatus as shown in Fig. 8 can be carried out by using the roller device 400. Fig. The roller device 40 may be a roll press type comprising a first pressure roller 41 and a second pressure roller 45 disposed at a certain distance from the first pressure roller 41, But is not limited thereto.

The first magnetic-field shielding member and the second magnetic-field shielding member may be provided in the shielding unit such that another shielding member is accommodated in one shielding member, or may be provided on the shielding unit, . 11 is a cross-sectional view of a magnetic shield unit according to a preferred embodiment of the present invention. The first magnetic shield member 122 includes a receiving portion 124 for receiving the second magnetic shield member 121 And the second magnetic shield member 121 is inserted into the accommodating portion 124 to form the different magnetic shield members as one layer, thereby reducing the thickness of the overall shield member. The arrangement of the first magnetic field shielding member 122 or the second magnetic field shielding member 121 may vary depending on the arrangement of the NFC antenna and the MST antenna in the composite antenna unit that is bonded to the shielding unit, A plurality of accommodating portions capable of accommodating the one magnetic-field shielding member may be included, and the arrangement of the specific shielding member is not limited to the above description. In addition, one of an adhesive member, a protective film, and a release film 123 may be formed on the upper and lower portions of the magnetic-field shielding members 121 and 122, respectively. 12 is a sectional view of the magnetic shielding unit according to a preferred embodiment of the present invention. The first magnetic shield member 9 and the second magnetic shield member 8 may be laminated to form a shielding unit At this time, an adhesive member 5 may be further provided between the respective shielding members 8, 9.

Next, a composite transmission module including the magnetic-field shielding unit according to the present invention will be described.

The composite transmission module according to the present invention includes a composite antenna unit including an antenna for magnetic security transmission (MST) and an antenna for short-range wireless communication (NFC); And a magnetic field shielding unit according to the present invention disposed on one surface of the composite antenna unit to induce a magnetic field and improve antenna characteristics.

1 is an exploded perspective view of a composite transmission module according to an embodiment of the present invention. The composite antenna unit 110 includes a composite antenna unit 110 and a magnetic-field shielding unit 120. The composite antenna unit 110 includes a circuit board 112 An NCF antenna 114a provided at the outermost portion of the MST antenna 114a and an MST antenna 114b provided at the inner side.

The description of the magnetic-field shielding unit 120 is the same as that described above, and will be described below in detail.

The composite antenna unit 110 may be used to transmit or receive radio frequency signals between portable electronic devices such as mobile phones, PDAs, PMPs, tablets, multimedia devices, smart home appliances, and LoT electronic devices or between the devices and other transceivers Accordingly, antennas using different frequency bands including antennas for magnetic security transmission (MST) and short-range wireless communication (NFC) can be combined into one unit, and different functions can be performed as one unit.

The composite antenna unit 110 may be provided on one surface of the magnetic field shielding unit 120 or may be provided in plurality and may be fixed to one surface of the shielding unit 120 through an adhesive layer .

The adhesive layer may be an adhesive bond, PVC, rubber or double-sided tape or the like, and may include a conductive component.

Each of the antennas included in the composite antenna unit 110 may be formed of a polygonal coil such as a circular, elliptical, spiral, or quadrangular shape wound in a clockwise or counterclockwise direction, or may be formed by etching a metal foil such as a copper foil .

In addition, the composite antenna unit 110 may be formed in a printed pattern on the circuit board 112, and one surface of the circuit board 112 may be attached to one surface of the magnetic-field shielding unit 120 described above.

The circuit board 112 is an element serving as a substrate on which an antenna pattern for MST and NCF for an MST and a circuit part are formed, and has heat resistance and pressure resistance, and is a flexible material. Considering the physical properties of such a material, a film such as PI or PET, which is a thermosetting polymer film, may be employed as the circuit board 112.

The connection terminal for electrical connection with the circuit board 112 may be connected to both ends of the composite antenna unit 110.

Since the shape and thickness of the circuit board can employ a known shape and thickness, the present invention is not limited thereto.

1, the NFC antenna 114a has a frequency band higher than that of the MST antenna 114b. Therefore, the antenna 110a is disposed along the outer periphery of the circuit board 112 And the MST antenna 114a uses a lower frequency band than the NFC antenna 114a. Therefore, the antenna 114a for the MST uses a lower frequency band than the antenna 114a for the NFC 114a, And can be formed with a wide line width. However, the positional relationship between the antennas may be changed according to the purpose, and the number of antennas included in one circuit board 112 may also be different from each other.

The NCF antenna 114a may serve as a receiving antenna or a transmitting antenna provided to transmit or receive data to enable file transmission, mobile settlement, or the like through a transmitted or received signal. The specific material, shape, thickness, length, and the like of the NCF antenna may be the same as that of a normal NCF antenna, and the present invention is not particularly limited thereto.

The MST antenna 114b may serve as a receiving antenna or a transmitting antenna for transmitting or receiving data for electronic approval via a magnetic signal transmitted or received .

The MST antenna 114b may be formed of an inductor, and the inductor may be a loop having at least one winding. Preferably, the loop may comprise more than 20 windings.

13 is a state diagram illustrating a portable electronic device having a magnetic security transmission module according to an exemplary embodiment of the present invention. Referring to FIG. 13, a composite transmission module 100 including a composite antenna unit including an MST antenna 114b The portable electronic device 200 including the portable electronic device 200 can generate an iridescent magnetic field that can pass through the reader heads (FIGS. 14 and 310) in the POS terminal even when the portable electronic device 200 is separated from the POS terminal 300 by a certain distance. To this end, the inductor may be configured to form a magnetic field that diffuses over a region corresponding to the sensing opening 302 of the magnetic reader head of the POS terminal so as to detect a sufficient magnetic field at the POS terminal.

In addition, the inductor may have inductive capacitance values that cause appropriately timed current pulses to reach their maximum value, thereby causing a maximum induced voltage in the leader header (Figures 14, 310). In addition, the inductor may have a sufficiently low resistance value to allow a large current required to generate a strong magnetic field. Therefore, the inductance of the inductor may have a ratio of the inductive capacity to the resistance value of 10 μH / Ω to 80 μH / Ω.

In addition, the inductor may lead to a material that is not saturated under the current flowing through the inductor.

The inductor may be formed of a coil having a polygonal shape such as a circular shape, an elliptical shape, a spiral shape or a quadrangular shape wound in a clockwise or counterclockwise direction, or may be formed by etching a metal foil such as a copper foil.

15, the outermost width w of the loop may be 15 to 50 mm, and the width d of the loop formed by the loop may be 3 mm. At this time, the loop may be formed such that the area formed by the loop is within 600 to 1700 mm 2.

The magnetic-field-shielding unit 120 includes a plate-like member having a predetermined area, and serves to induce a magnetic field generated by the antenna unit 110, perform different functions as described above, There is an advantage that the characteristics of the two kinds of antennas can be simultaneously increased even with the first magnetic-field shielding member alone for the composite antenna unit including the two kinds of antenna units 114a and 114b using different or partially overlapping frequency bands It is advantageous in that each shielding member does not have to be provided for each antenna characteristic. Through this, it is possible to provide a magnetic shielding unit, a composite transmission module, various mobile devices using the same, smart home appliances and devices for internet of things Is remarkably advantageous in realizing a slimmer structure while exhibiting remarkably excellent physical properties.

Meanwhile, the composite transmission unit according to the present invention may further include other structures such as a heat dissipation unit, and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: composite transmission module 110: composite antenna unit
112: Circuit board 114a: NCF antenna
114b: Antenna for MST
10, 120: shielding unit 1: protective film
3: release film 5: eddy current braking substance
9, 121a, 121b, 121c: ribbon sheet layer 121d: adhesive layer

Claims (23)

A shielding unit for a composite antenna unit which induces a magnetic field in accordance with magnetic security transmission (MST) and short-range wireless communication (NFC)
The shielding unit may include a first magnetic shielding member including at least one member selected from the group consisting of Mg-Cu-Zn ferrite and Ni-Mg-Cu-Zn ferrite that improves the characteristics of the antenna of the composite antenna unit And a shielding unit for shielding the antenna unit.
The method according to claim 1,
Wherein the shielding unit further comprises a second magnetic shield member having a magnetic permeability different from that of the first magnetic shield member.
3. The method of claim 2,
Wherein the second magnetic shield member comprises a plurality of magnetic flakes. ≪ RTI ID = 0.0 > 11. < / RTI >
The method of claim 3,
Wherein one of the plurality of magnetic flakes has a spaced-apart spacing from adjacent ones of the other flakes.
5. The method of claim 4,
Wherein all or a part of the spaced space is filled with an eddy current brake material.
The method of claim 3,
Wherein the plurality of magnetic substance flakes are derived from an amorphous ribbon sheet.
The method according to claim 6,
Wherein the amorphous ribbon sheet comprises at least one selected from an amorphous alloy and a nanocrystalline alloy. 8. The method of claim 7,
Wherein the amorphous alloy comprises silicon-based steel.
The method of claim 3,
Wherein the magnetic substance flakes have an average particle diameter of 1 to 5 mm.
The method of claim 3,
Wherein the plurality of magnetic flakes are irregular.
6. The method of claim 5,
Wherein the eddy current braking material is an insulating adhesive or a thermally conductive heat-dissipating adhesive.
The method of claim 3,
Wherein the second magnetic shield member comprises a monolayer member; Or a multilayer member in which a plurality of second magnetic field shield members are stacked.
13. The method of claim 12,
Wherein the multi-layer member comprises three to ten first magnetic-field shielding members laminated.
13. The method of claim 12,
Further comprising an insulating adhesive layer or a thermally conductive heat-releasing adhesive layer interposed between the first magnetic-field shielding members when the first magnetic-field shielding member is a multilayer member.
A composite antenna unit including an antenna for magnetic security transmission (MST) and an antenna for short-range wireless communication (NFC); And
The composite transmission module according to any one of claims 1 to 15, which is disposed on one surface of the composite antenna unit to induce a magnetic field and improve antenna characteristics.
16. The method of claim 15,
Wherein the inductor forming the antenna for the magnetic security transmission (MST) comprises a loop having at least one winding, the inductor being configured to form a magnetic field which diffuses over a region corresponding to the sensing opening of the magnetic reader head And a multiplex transmission module.
17. The method of claim 16,
Wherein the inductor is made of a material which is not saturated under a current flowing in the inductor.
17. The method of claim 16,
And the ratio of the inductive capacity and the resistance value of the inductor is 10? H /? To 80? H /?.
16. The method of claim 15,
And the area formed by the loop is 600 to 1700 mm < 2 >. 16. The method of claim 15,
Wherein the antenna for the magnetic security transmission and the antenna for the short-range wireless communication are spaced apart from each other.
17. A mobile device comprising a composite transmission module according to claim 15.
A smart appliance including the composite transmission module according to claim 15.
An apparatus for Internet of Things comprising a composite transmission module according to claim 15.

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