KR20160139783A - Cable including structure for shielding broadband electromagnetic wave - Google Patents

Cable including structure for shielding broadband electromagnetic wave Download PDF

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Publication number
KR20160139783A
KR20160139783A KR1020150075300A KR20150075300A KR20160139783A KR 20160139783 A KR20160139783 A KR 20160139783A KR 1020150075300 A KR1020150075300 A KR 1020150075300A KR 20150075300 A KR20150075300 A KR 20150075300A KR 20160139783 A KR20160139783 A KR 20160139783A
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KR
South Korea
Prior art keywords
shielding layer
shielding
layer
frequency range
electromagnetic waves
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KR1020150075300A
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Korean (ko)
Inventor
박광원
육종현
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가온전선 주식회사
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Priority to KR1020150075300A priority Critical patent/KR20160139783A/en
Publication of KR20160139783A publication Critical patent/KR20160139783A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/022—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of longitudinal lapped tape-conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/023—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of helicoidally wound tape-conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/026—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of longitudinally posed wire-conductors

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Insulated Conductors (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The present invention relates to a cable having a broadband electromagnetic wave shielding structure which improves shielding performance against electromagnetic waves in a wide frequency range. The cable having a broadband electromagnetic wave shielding structure according to the present invention comprises: at least one wire including a core made of a conductive material and an inner insulating layer surrounding the core; a first shielding layer surrounding all the wires and intensively shielding electromagnetic waves in a first frequency range among the electromagnetic waves in the first frequency range and electromagnetic waves in a second frequency range higher than the first frequency range; and a second shielding layer provided inside or outside the first shielding layer to surround all the wires and intensively shielding the electromagnetic waves in the second frequency range.

Description

[0001] CABLE INCLUDING STRUCTURE FOR SHIELDING BROADBAND ELECTROMAGNETIC WAVE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable, and more particularly, to a cable having a broadband electromagnetic wave shielding structure that improves the shielding performance against electromagnetic waves in a wide frequency range.

When a current flows through a wire, an electromagnetic wave is generated from the wire and radiated to the outside. Such electromagnetic waves cause malfunctions in an external wire, a communication line, a cellular phone, a computer device and various household appliances. In addition, when an electromagnetic wave generated from an external electric wire or an external electronic product flows into the electric wire, disturbance due to electromagnetic waves or noise prevents accurate transmission of the communication signal.

In addition, such various electromagnetic waves are known to have harmful effects on living organisms such as human body, animal, and crops, such as an increase in incidence of cancer, induction of feuding, and reduction of yield.

In order to prevent the electromagnetic waves generated from the wires from being radiated to the outside of the wires and to prevent the electromagnetic waves generated from the external wires and the external electronic products from flowing into the wires, electromagnetic waves are generally shielded from the wires.

1 is a schematic perspective view of an electromagnetic wave shielding structure of a cable according to the prior art.

As shown in FIG. 1, the electromagnetic wave shielding structure 20 of the cable according to the related art includes a conductive tape 21 installed to surround the cable 10.

The electromagnetic wave is composed of an electric field component and a magnetic field component. Since the electromagnetic wave shielding structure of the cable according to the prior art has only a tape having conductivity, it can have a certain shielding performance with respect to the electric field component of the electromagnetic wave component, There is a problem that the shielding performance is very low.

In addition, as the range of electromagnetic waves recently generated becomes high in frequency and wide band, there is a need to shield not only electromagnetic waves in a low frequency range but also electromagnetic waves in a high frequency range. However, the electromagnetic wave shielding structure of a cable according to the prior art There is a problem that the electromagnetic wave shielding performance is low due to a very narrow range of electromagnetic waves.

KR 10-0778115 B

It is therefore an object of the present invention to provide a cable which solves the problems of the prior art.

Specifically, it is an object of the present invention to provide a cable having improved shielding performance against electromagnetic waves having a frequency in a wide band.

It is still another object of the present invention to provide a cable having improved shielding performance against the electric field components and magnetic field components of electromagnetic waves.

According to one embodiment of the present invention for solving the above-mentioned problems, the present invention provides a semiconductor device comprising: at least one electric wire including a core made of a conductive material and an inner insulating layer surrounding the core; And a shielding member for shielding the electromagnetic waves in the first frequency range and the electromagnetic waves in the second frequency range higher than the first frequency range by shielding the electromagnetic waves in the first frequency range, A shielding layer; Shielding the electromagnetic wave in the first frequency range and the electromagnetic wave in the second frequency range so as to surround the entire at least one electric wire, And a second shielding layer for concentrically shielding the first shielding layer and the second shielding layer.

Preferably, the first shielding layer is made of a material having high electrical conductivity and ferromagnetic properties.

Preferably, the first shield layer includes an Fe (Fe) thin film layer or an Fe-alloy thin film layer.

Preferably, the second shielding layer is formed of a material having high electrical conductivity.

Preferably, the second shielding layer includes an aluminum (Al) thin film layer or an aluminum alloy (Al-alloy) thin film layer.

Preferably, the at least one shielding layer of the first shielding layer and the second shielding layer includes a cylindrical body portion surrounding the at least one electric wire, and a cylindrical body portion having both side ends of the cylindrical body portion overlapping a certain area And a single seam which is made of a metal.

Preferably, at least one or more of the first shield layer and the second shield layer are electrically connected to each other along the longitudinal direction of the at least one shield layer on the inner or outer surface of the shield layer, And a conductive wire made of a high-conductivity material.

Preferably, the conductive wire is electrically connected to the first shielding layer and the second shielding layer between the first shielding layer and the second shielding layer.

Preferably, at least one end of the conductive wire in the longitudinal direction of the conductive wire is electrically connected to an external ground wire or an external ground.

According to another embodiment of the present invention, there is provided a semiconductor device comprising: at least one electric wire including a core made of a conductive material and an inner insulating layer surrounding the core; A first shielding layer which surrounds the at least one electric wire and includes an iron thin film layer or an iron alloy thin film layer; And a second shielding layer provided inside or outside the first shielding layer so as to surround the entire at least one electric wire, the shielding layer comprising an aluminum thin film layer or an aluminum alloy thin film layer can do.

Preferably, at least one or more of the first shield layer and the second shield layer are electrically connected to each other along the longitudinal direction of the at least one shield layer on the inner or outer surface of the shield layer, And a conductive wire made of a high-conductivity material.

According to the present invention, by providing the first shielding layer and the second shielding layer, shielding performance against electromagnetic waves in a relatively low frequency range can be improved and shielding performance against electromagnetic waves in a relatively high frequency range can be improved It is possible to improve the shielding performance against the entire electromagnetic waves in the wide frequency range.

The first shield layer is made of a material having ferromagnetic and high electrical conductivity and the second shield layer is made of a material having high electrical conductivity, so that not only electric field components of electromagnetic waves but also magnetic fields It is possible to improve the shielding performance against components of the electromagnetic wave and further improve the shielding performance against the electric field component of the electromagnetic wave through the second shielding layer and to improve the shielding performance against the electric field component of the electromagnetic wave and the whole magnetic field component .

In addition, since the present invention includes the conductive wire electrically connected to the shielding layer of at least one of the first shielding layer and the second shielding layer, the first shielding layer and / or the second shielding layer The overall shielding performance of the cable can be further improved due to the high electrical conductivity of the conductive wire while preventing the shielding performance from being degraded due to the low mechanical stiffness.

Particularly, according to the present invention, the conductive wire is electrically connected to both the first shielding layer and the second shielding layer between the first shielding layer and the second shielding layer, so that the first shielding layer and the second shielding layer Even if a shear phenomenon (i.e., tearing) occurs, the shielding performance can be prevented from lowering and the shielding performance of the entire first shielding layer and the second shielding layer can be further improved.

FIG. 1 is a schematic perspective view of an electromagnetic wave shielding structure of a cable according to the prior art,
2 is a schematic perspective view of a cable according to an embodiment of the present invention,
3 is a schematic vertical cross-sectional view taken along line AA of FIG. 2,
4 is a schematic exploded perspective view of a cable according to a first embodiment of the present invention,
Figure 5 is a schematic longitudinal section view of the cable of Figure 4,
6 is a schematic exploded perspective view of a cable according to a second embodiment of the present invention,
Figure 7 is a schematic longitudinal section view of the cable of Figure 6,
8 is a graph showing experimental data on electromagnetic wave shielding performance of a cable according to the prior art and a cable according to the present invention,
9 is a graph showing experimental data on shielding performance of cables according to the prior art and cables according to the present invention with respect to electric field components in electromagnetic waves,
FIG. 10 is an enlarged graph of the portion 'A' in FIG. 9,
11 is a graph showing experimental data on the shielding performance of a cable according to the prior art and a cable according to the present invention with respect to magnetic field components in electromagnetic waves,
FIG. 12 is an enlarged graph of a portion 'B' in FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be noted that the drawings denoted by the same reference numerals in the drawings denote the same reference numerals whenever possible, in other drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. And certain features shown in the drawings are to be enlarged or reduced or simplified for ease of explanation, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

FIG. 2 is a schematic perspective view of a cable 1000 according to an embodiment of the present invention, FIG. 3 is a schematic longitudinal sectional view taken along line AA of FIG. 2, and FIG. 4 is a cross- 5 is a schematic vertical cross-sectional view of the cable 1000 of FIG. 4, and FIG. 6 is a schematic cross-sectional view of the cable 1000 according to the second embodiment of the present invention. And FIG. 7 is a schematic vertical cross-sectional view of the cable 1000 of FIG.

2 to 7, a cable 1000 according to an embodiment of the present invention includes at least one electric wire 100, and an insulator filling part 130 surrounding the at least one electric wire 100, A second shielding layer 300 surrounding the at least one electric wire 100, and a second shielding layer 300 surrounding the at least one electric wire 100. The first shielding layer 400 surrounds the insulator filling part 200, A conductive wire 500 electrically connected to the first shield layer 400 and / or the second shield layer 300 and a conductive wire 500 electrically connected to the first shield layer 400 and / or the second shield layer 300, And an external insulating layer 700 surrounding the binder 600. The binder 600 may be a metal or a metal.

That is, the cable 1000 is connected to at least one of the electric wires 100, the insulator filling part 200, the first shielding layer 400 (or the second shielding layer 400) from the center of the cable 1000 in the outer radial direction, The conductive wire 500 and the second shielding layer 300 (or the first shielding layer 400 when the second shielding layer 300 is positioned on the inner side), the binder 600, (I.e., a sheath).

First, one or a plurality of the electric wires 100 may be provided. For example, as shown in the figure, the wire 100 may be comprised of a three-phase cable 1000, and may include three three-phase power lines and one neutral line.

The electric wire 100 includes a core 110 made of a conductive material and an inner insulating layer 120 surrounding the core 110.

The core 110 may be single or twisted. In addition, the core 110 is made of a material having a very high electrical conductivity, that is, a high electrical conductive material. For example, the core 110 may be made of copper (Cu).

The insulator filling part 200 is made of an insulating material and is provided so as to surround the at least one electric wire 100. When the plurality of electric wires 100 are provided, the insulator filling part 200 is also filled in a space between the plurality of electric wires 100. The electrothermal filler may be composed of a foaming agent, or may be composed of a plurality of insulating fillers.

The outer circumferential surface of the insulator filling part 200 may be surrounded by a binder.

The first shield layer 400 and / or the second shield layer 300 are provided to surround the insulator filling part 200.

The first shield layer 400 and the second shield layer 300 may be arranged in various ways. For example, the first shielding layer 400 may surround the insulating filler 200, and the second shielding layer 300 may surround the first shielding layer 400. The second shielding layer 300 may surround the insulating filler 200 and the first shielding layer 400 may surround the second shielding layer 300.

The first shielding layer 400 is configured to shield electromagnetic waves in the first frequency range and electromagnetic waves in the second frequency range higher than the first frequency range, 1 < / RTI > frequency range.

Here, the first frequency range is a low frequency range relative to the second frequency range, and the second frequency range is a high frequency range relative to the first frequency range. Preferably, the first frequency range is 60 Hz or more and 1 kHz or less, and the second frequency range is 1 kHz or more and 1 GHz or less.

At the same time, the first shield layer 400 is configured to block both the electric field component and the magnetic field component included in the electromagnetic wave.

For this purpose, the first shield layer 400 is made of a material having high electrical conductivity and ferromagnetic properties. Alternatively, the first shield layer 400 is made of a material having a high electrical conductivity and a high permeability.

Preferably, the first shield layer 400 may include an Fe (Fe) thin film layer or an Fe-alloy thin film layer. Here, the first shield layer 400 may be an iron tape or a soft iron tape. More preferably, when the first shield layer includes an iron thin film layer (or an iron tape) or an iron alloy thin film layer (or an iron alloy tape), a zinc coating layer and a tin plating layer . The fact that the first shielding layer made of iron or an iron alloy is particularly excellent in shielding electromagnetic waves in the first frequency range, which is a relatively low frequency range, while shielding the entire electric and magnetic field components of electromagnetic waves, 9 and Fig. 12 will be described in detail.

The thickness of the first shield layer 400 may be 0.02 mm to 0.12 mm, and the thickness of the first shield layer 400 may be 0.07 mm.

The second shielding layer 300 is configured to shield electromagnetic waves in the first frequency range and electromagnetic waves in the second frequency range higher than the first frequency range, 2 frequency range of electromagnetic waves.

At the same time, the second shield layer 300 is configured to intensively shield the electric and magnetic field components included in the electromagnetic wave.

For this, the second shield layer 300 is made of a material having high electrical conductivity.

Preferably, the second shield layer 300 may include an aluminum (Al) thin layer or an aluminum alloy thin layer. The fact that the second shielding layer made of aluminum or an aluminum alloy is excellent in the ability to intensively shield the electromagnetic waves in the second frequency range, which is a relatively high frequency range, while simultaneously shielding the electric field components of the electromagnetic waves, will be described later in FIGS. 9 and 12 Will be described in detail.

The thickness of the second shield layer 300 is preferably 0.01 mm to 0.1 mm.

More preferably, the thickness of the second shield layer 300 may be 0.06 mm. If the second shield layer 300 includes an aluminum thin film layer, the second shield layer 300 may include a 0.05 mm thick polymer tape and a 0.01 mm thick aluminum layer coated on one side of the polymer tape do.

Thus, by providing both the first shielding layer 400 and the second shielding layer 300, it is possible to provide an excellent shielding performance against the electromagnetic waves in the first frequency range and the electromagnetic waves in the second frequency range, I have. In particular, the cable 1000 according to the present invention having both the first shielding layer 400 made of an iron thin film layer and the second shielding layer 300 made of an aluminum thin film layer has a very excellent electromagnetic wave shielding performance, 8 to 12 will be described more concretely.

The conductive wire 500 includes only a core 110 made of a conductive material and does not have an insulating layer surrounding the core 110. In addition, the conductive wire 500 is made of a high-conductivity material. For example, the conductive wire 500 may be made of copper (Cu).

As a further embodiment, the core 110 may be made of copper at its core, and a tin plating layer or a zinc plated layer may be formed at the surface of the core.

The conductive wire 500 may be formed of a single wire or a twisted wire. The cross-sectional area of the conductive wire 500 is preferably 0.5 mm 2 to 2.5 mm 2 , more preferably, 0.5 mm < 2 >.

The conductive wire 500 may be provided along the longitudinal direction of the at least one shield layer so as to be electrically connected to at least one of the first shield layer 400 and the second shield layer 300 . That is, the conductive wire 500 may be formed on the inner surface of the first shield layer 400, the outer surface of the first shield layer 400, the inner surface of the second shield layer 300, And may be disposed in an inscribed or circumscribed manner so as to electrically connect to one of the outer side surfaces of the semiconductor chip 300.

The conductive wire 500 may be disposed between the first shield layer 400 and the second shield layer 300. Accordingly, the conductive wire 500 may be arranged to be electrically connected to both the first shielding layer 400 and the second shielding layer 300.

More preferably, the conductive wire 500 may be composed of a material having a high electrical conductivity and a ferromagnetic (or high) permeability. Here, the conductive wire 500 may be a single wire or a twisted wire made of iron (Fe) or an iron alloy.

Preferably, when the conductive wire is made of iron or an iron alloy, the conductive wire may be configured to include an iron core portion and a tin plating layer or a zinc plating layer formed on the surface of the core portion.

At least one end portion of the conductive wire 500 in the longitudinal direction of the conductive wire 500 is electrically connected to an external ground wire or an external ground portion (for example, a distributor box). Accordingly, the electromagnetic wave absorbed in the first shield layer 400 and / or the second shield layer 300 can be discharged to the external ground line or the external ground along the conductive wire 500, Can be further improved.

The manner in which the first shielding layer 400 and / or the second shielding layer 300 surrounds the at least one electric wire 100 may vary. However, according to the present invention, the first shield layer 400 and / or the second shield layer 300 may be formed on one of the first shield layer 400 and the second shield layer 300, A taping method of winding the wire in the longitudinal direction on the outer circumferential surface of the at least one wire 100 (or the outer circumferential surface of the insulator filling portion 200 or the outer circumferential surface of the other shielding layer) in a spiral manner; The shielding layer of one of the layer 400 and the second shielding layer 300 may be formed on the outer circumferential surface of the at least one wire 100 (or the outer circumferential surface of the insulating filler 200 or the outer circumferential surface of the other shielding layer) And a pipe system that simultaneously surrounds the entire body. Hereinafter, the manner in which the first shield layer 400 and / or the second shield layer 300 surrounds the at least one electric wire 100 will be described in more detail. For the sake of clarity, the second shielding layer 300 is disposed on the inner side of the first shielding layer 400. However, the present invention is not limited thereto.

4 and 5, the first shielding layer 400 and the second shielding layer 300 may have a length of the outer peripheral surface of the at least one electric wire 100, In a pipe-like manner.

5, the second shield layer 300 includes a main body portion 310 facing the outer peripheral surface of the at least one electric wire 100 (or the outer peripheral surface of the insulative material filling portion 200) And at least one overlapped portion 320 in which one end portion 320a and the other end portion 320b of the main body portion 310 overlap with each other by a predetermined area.

6 and 7, the second shielding layer 300 may be formed in a pipe-like manner so as to simultaneously surround the longitudinal direction of the outer circumferential surface of the at least one electric wire 100. In other words, And the first shielding layer 400 surrounds the second shielding layer 300 in a taping manner.

7, the second shielding layer 300 is formed on the outer circumferential surface of the at least one electric wire 100 (or the outer circumferential surface of the insulator filling portion 200) And a single joint portion 340 in which one end portion 340a and the other end portion 340b of the cylindrical body portion 330 are overlapped by a certain area.

Assuming a shielding layer of the same thickness, as the overlapping area of the shielding layers increases, the contact resistance increases and the electrical conductivity decreases. The resistance is proportional to the length of the conductive line, . Based on this principle, the taping-type shielding layer has a larger overlapping area than the pipe-type shielding layer, thereby increasing the contact resistance. Therefore, the electrical conductivity is lower than that of the pipe-type shielding layer. The total length of the shield layer increases, so that the total resistance increases in proportion to the length, and the electrical conductivity becomes lower than that of the shielding layer of the pipe type. That is, since the shielding layer is provided in a pipe manner rather than the taping method, the resistance is reduced as a whole to improve the electrical conductivity, thereby improving the electromagnetic wave shielding performance of the pipe-type shielding layer compared to the taping-type shielding layer.

6 and 7 than the second shielding layer 300 according to the embodiment shown in Figs. 4 and 5, the second shielding layer 300 according to another embodiment shown in Figs. 6 and 7, (300) has better electromagnetic wave shielding performance.

6 and 7, only the second shielding layer 300 is provided in a pipe manner, but the present invention is not limited thereto. Accordingly, as a further embodiment, the first shielding layer 400 is provided in a pipe-type manner which simultaneously surrounds the longitudinal direction of the outer circumferential surface of the second shielding layer 300, Or to surround the periphery of at least one outer surface of the electric wire 100 in a taping manner; Both the first shielding layer 400 and the second shielding layer 300 may be provided in a taping manner, and may include the cylindrical body portion and the single joint portion.

At this time, preferably, when both the first shield layer 400 and the second shield layer 300 include the cylindrical body portion and the single joint portion, the first shield layer 400 and the second shield layer 300 The second shielding layer 300 may be provided such that the single junction of the first shielding layer 400 and the single junction of the second shielding layer 300 do not overlap with each other. This is because, when the single junction of the first shielding layer 400 and the single junction of the second shielding layer 300 overlap, the contact resistance can be further increased, and at the same time, And it is difficult for the vertical cross-section of the cable 1000 to maintain a circular shape as a whole.

Hereinafter, experimental data on the shielding effect of the cable according to the present invention will be described in detail.

FIG. 8 is a graph showing experimental data on the electromagnetic wave shielding performance of the cable according to the prior art and the cable according to the present invention, FIG. 9 is a graph showing the shielding performance FIG. 10 is an enlarged graph of the 'A' portion of FIG. 9, and FIG. 11 is a graph showing the shielding performance of the cable according to the present invention and the cable according to the present invention, FIG. 12 is a graph enlarging the portion 'B' of FIG. 11. FIG.

Specifically, FIG. 8 shows a shielding effect of a cable and a shielding effect of a first shielding layer (in this graph, it is composed of an iron thin film layer 9 and 10 are graphs showing a shielding effect of a cable according to the present invention including a first shielding layer (experiment) and a second shielding layer (experimenting with an aluminum thin film layer in this graph) (Experimented with a copper thin film layer in this graph), the electric field intensity emitted from the cable and the first shielding layer (experimented with an iron thin film layer in this graph) and the second shielding layer Aluminum thin film layer), and FIG. 10 and FIG. 11 are graphs showing the electric field intensity radiated from the cable according to the present invention, The magnetic field intensity emitted from the cable and the first shielding layer (experimented with an iron thin film layer in this graph) are compared with the conventional art in which a single shielding layer having only electrical conductivity (experimented with a copper thin film layer in this graph) And a second shielding layer (experimented with an aluminum thin film layer in this graph).

As shown in FIG. 8, it can be seen that the cable according to the prior art shows a remarkably reduced shielding effect (dB) at a frequency of 10 6 Hz or more, but the cable according to the present invention has the first shielding layer and the second The shielding effect is continuously increased even at a frequency of 10 6 Hz or more due to the shielding layer and the shielding effect is remarkably improved as compared with the shielding effect of the cable according to the prior art as a whole.

For example, when comparing the shielding effect at a point of 30 MHz, the shielding effect of the cable according to the present invention is 88.61 dB, compared to the cable according to the prior art, whereas the shielding effect of the cable according to the prior art is only 68.59 dB The shielding effect is significantly improved.

9 and 10, it can be seen that the cable according to the present invention emits electromagnetic waves of much lower electric field intensity than the cable according to the prior art in a relatively low frequency region and a relatively high frequency region, It can be seen that the cable according to the present invention has a significantly improved electromagnetic wave shielding effect as compared with the cable according to the related art. In the case of the cable according to the related art, it is confirmed that the electromagnetic wave having a large electric field strength is emitted in a relatively high frequency region, and the shielding effect on the electric field component is remarkably reduced in the relatively high frequency region. On the contrary, It can be seen that the cable according to the present invention emits only electromagnetic waves having a very small electric field intensity even in a relatively high frequency region, and thus has a shielding effect on a uniform and excellent electric field component in a relatively low frequency region and relatively high frequency region relatively.

Also, as shown in Figs. 11 and 12, it can be seen that the cable according to the present invention emits electromagnetic waves having a magnetic field strength much smaller than that of the cable according to the prior art in a relatively low frequency region and a relatively high frequency region, It can be seen that the cable according to the present invention has a significantly improved electromagnetic wave shielding effect as compared with the cable according to the related art. In the cable according to the related art, it is confirmed that electromagnetic waves having a remarkably large magnetic field intensity are emitted in a relatively low frequency range. Thus, it can be confirmed that a shielding effect against magnetic field components is insufficient in a relatively low frequency range. It can be seen that the cable according to the present invention emits electromagnetic waves having a very small magnetic field intensity even in a relatively low frequency region. Thus, it can be confirmed that the cable has a shielding effect on a uniform and excellent electric field component in a relatively low frequency region and relatively high frequency region.

Although not specifically described, the electric field shielding effect between the aluminum thin film layer (Al), the copper thin film layer (Cu) and the iron thin film layer (Fe) and the present invention (Fe + Al ) Can be compared with each other.

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, but, on the contrary, And the like. Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

1000: Cable according to the present invention
100: Wires
200: insulator filling part
300: second shield layer
400: first shield layer
500: conductive wire
600: binder
700: outer insulating layer

Claims (11)

At least one electric wire including a core made of a conductive material and an inner insulating layer surrounding the core;
And a shielding member for shielding the electromagnetic waves in the first frequency range and the electromagnetic waves in the second frequency range higher than the first frequency range by shielding the electromagnetic waves in the first frequency range, A shielding layer;
Shielding the electromagnetic wave in the first frequency range and the electromagnetic wave in the second frequency range so as to surround the entire at least one electric wire, And a second shielding layer that shields the first shielding layer and the second shielding layer. The method according to claim 1,
Wherein the first shield layer is composed of a material having high electrical conductivity and ferromagnetic property. The method according to claim 1,
Wherein the first shielding layer comprises a thin film layer of iron (Fe) or a thin film layer of a ferro-alloy (Fe-alloy). The method according to claim 1,
Wherein the second shield layer is made of a material having a high electrical conductivity. The method according to claim 1,
Wherein the second shielding layer comprises an aluminum (Al) thin film layer or an aluminum alloy (Al-alloy) thin film layer. The method according to claim 1,
At least one shielding layer of the first shielding layer and the second shielding layer includes a cylindrical body portion surrounding the at least one electric wire and a single seam having both ends of the cylindrical body portion overlapped by a certain area, Wherein the cable has a broadband electromagnetic wave shielding structure. The method according to claim 1,
And at least one of the first shielding layer and the second shielding layer is electrically connected to the shielding layer along the longitudinal direction of the at least one shielding layer on the inner or outer surface of the shielding layer, Wherein the conductive wire comprises a conductive wire. 8. The method of claim 7,
Wherein the conductive wire is electrically connected to the first shielding layer and the second shielding layer between the first shielding layer and the second shielding layer. 8. The method of claim 7,
Wherein at least one end of the conductive wire in the longitudinal direction of the conductive wire is electrically connected to an external ground wire or an external ground wire. At least one electric wire including a core made of a conductive material and an inner insulating layer surrounding the core;
A first shielding layer which surrounds the at least one electric wire and includes an iron thin film layer or an iron alloy thin film layer;
And a second shielding layer disposed inside or outside the first shielding layer to surround at least one of the at least one electric wire, the shielding layer including an aluminum thin-film layer or an aluminum alloy thin-film layer. 11. The method of claim 10,
And at least one of the first shielding layer and the second shielding layer is electrically connected to the shielding layer along the longitudinal direction of the at least one shielding layer on the inner or outer surface of the shielding layer, Wherein the conductive wire comprises a conductive wire.
KR1020150075300A 2015-05-28 2015-05-28 Cable including structure for shielding broadband electromagnetic wave KR20160139783A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100778115B1 (en) 2006-06-02 2007-11-21 삼성전자주식회사 Electro-magnetic interference shield device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100778115B1 (en) 2006-06-02 2007-11-21 삼성전자주식회사 Electro-magnetic interference shield device

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