KR101579431B1

KR101579431B1 - Apparatus for Reducing Electromagnetic Wave

Info

Publication number: KR101579431B1
Application number: KR1020140169748A
Authority: KR
Inventors: 김기채; 김철수
Original assignee: 영남대학교 산학협력단; 주식회사 이엠시스
Priority date: 2014-12-01
Filing date: 2014-12-01
Publication date: 2015-12-24

Abstract

The present invention relates to an electromagnetic wave reducing device and, more specifically, to an electromagnetic wave reducing device, capable of reducing electromagnetic waves permeating through a slot of a protective facility or electronic device. The device includes a base filter installed around the slot. The base filter includes at least one combination groove to be combined with a protrusion formed around the slot, and a conductive wire or conductive panel is inserted into the base filter in a longitudinal direction. According to the present invention, the electromagnetic wave reducing device reduces the size of the electromagnetic waves permeating through the slot, and thus forms perfect electromagnetic wave shielding and prevents electromagnetic wave interference (EMI). The device blocks the electromagnetic waves permeating through the slot of an electromagnetic wave shielding chamber or EMP protective facility by being applied to the electromagnetic wave shielding chamber or EMP protective facility, and therefore, minimizes a weak point, permeated by the electromagnetic waves, in order to more perfectly protect main social facilities from EMP attacks. The present invention is applied to a variety of electronic devices to reduce the electromagnetic waves, emitted through the slot of the electronic devices, and therefore, the present invention is capable of preventing EMI on the other electronic devices as well as reducing the quantity of the electromagnetic waves, exposed when a user uses the electronic devices.

Description

{Apparatus for Reducing Electromagnetic Wave}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave abatement device, and more particularly, to an electromagnetic wave abatement device for protecting an electric / electronic device by reducing an electromagnetic interference penetrating through a slot and applying the same to various EMP protection facilities requiring electromagnetic shielding .

Due to the spread of electric and electronic devices, the use of electromagnetic waves has increased rapidly in everyday life. An electromagnetic wave is a wave that travels by combining an electric field and a magnetic field. As the amount of electric and electronic devices used increases in everyday life, unnecessary electromagnetic waves are generated from these electric / electronic devices.

Electromagnetic waves are used for communications such as mobile phones and wireless LANs, and for broadcasting such as radio, TV, and DMB, and are also used in home appliances such as microwave ovens and induction heaters. It also uses electromagnetic waves in medical fields such as MRI, X-ray, and infrared therapy.

However, electromagnetic waves also affect the operation of electric or electronic devices or other devices that generate unnecessary electromagnetic waves. This interference is mainly caused by the noise of the electromagnetic wave intruding from the outside, and this obstacle is called electromagnetic interference (EMI).

Incoming and outgoing equipment intentionally and unintentionally generates electromagnetic waves, degrading the function of internal electronic components and shortening the life span. In addition, unwanted electromagnetic waves can cause interference between electric and electronic devices, and malfunctions of equipment may cause damage to persons and property.

In addition, electromagnetic waves can increase the body temperature when reaching the human body, or the induced current may affect the human body, such as stimulating the nervous system. In order to prevent problems caused by electromagnetic waves, various technologies related to electromagnetic shielding are being developed both domestically and abroad.

In order to shield electromagnetic waves, zinc spray, plating, and conductive paint are applied to the case surface of the apparatus, or the plastic itself used in the case of the apparatus is made conductive. In addition, an EMP protection facility is constructed to protect major national facilities from high-power electromagnetic waves (EMP, electromagnetic pulse).

In order to effectively shield the penetrating electromagnetic wave, the EMP protection facility made of a conductive metal plate necessarily has an opening for air injection and power line and signal line entrance. In addition, various electrical and electronic devices are provided with openings such as slots in the case of the electric / electronic apparatuses due to ventilation holes for emitting generated heat and connectors for input and output lines. Through this opening, the disturbing electromagnetic wave can be penetrated into the protection facility or the inside of the device, and the disturbing electromagnetic wave can be radiated from the inside of the protection facility or the inside of the device.

In general, an obstacle electromagnetic wave that conducts along a power line or a signal line can reduce a conductive disturbance electromagnetic wave by using a power line filter or a signal line filter. The radiofrequency electromagnetic wave emitted or penetrating into the opening is reduced in size by appropriately reducing the size of the opening or by using a waveguide below cutoff (WBC) or a honeycomb structure. However, it is not possible to reduce the disturbing electromagnetic wave exceeding the frequency at which the size of the opening becomes an integral multiple of the half wave length.

Therefore, it is necessary to reduce the electromagnetic wave exposure of the user by applying a technique of shielding the electric and electronic devices by interrupting the disturbing electromagnetic waves penetrating into the openings such as the slots and shielding the electromagnetic waves radiated from the inside of the device through the slots of various electrical and electronic devices.

The technology of the background of the present invention is disclosed in Korean Patent No. 10-1400299 (published on Apr. 27, 2014).

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave abatement device, and more particularly, to an electromagnetic wave abatement device for protecting an electric / electronic device by reducing an electromagnetic interference penetrating through a slot and applying the same to various EMP protection facilities requiring electromagnetic shielding The purpose of this paper is to provide

According to an aspect of the present invention, there is provided an electromagnetic wave abatement apparatus for reducing electromagnetic waves penetrating through a slot formed in an electronic device or a security facility, the electronic device including a base filter installed around the slot, In the base filter, at least one coupling groove for coupling with a protrusion formed in the periphery of the slot is formed on one side surface, and a conductor line or a conductive plate is inserted in the longitudinal direction.

The base filter may further include at least one connection filter connected in series to the other side of the base filter.

Further, the base filter may have a coupling groove or coupling protrusion formed on the other side thereof, and the coupling filter may have a coupling protrusion or coupling groove formed on one side thereof and a coupling groove or coupling protrusion formed on the other side thereof.

The connection filter may have a conductor line or a conductor plate inserted in the longitudinal direction.

Further, the number of the connection filters may be determined corresponding to the wavelength of the frequency to be blocked, or the length of the connection filter coupled to the base filter or the base filter may be determined.

The base filter or the connection filter may be formed of a dielectric or magnetic material, and the coupling protrusion formed on the base filter or the connection filter may be formed of a non-metal body.

In addition, a plurality of the base filters may be installed at positions symmetrical with respect to the slot.

Therefore, by using the electromagnetic wave abatement device according to the present invention, it is possible to reduce the size of the electromagnetic wave penetrating through the slot formed in the electronic device or the security facility, thereby achieving perfect electromagnetic wave shielding and preventing electromagnetic interference (EMI) can do.

It is also applied to EMP protection facilities or electromagnetic shielding rooms to block electromagnetic waves penetrating into slots formed in EMP protection facilities or electromagnetic shielding rooms, thereby minimizing loopholes that can penetrate electromagnetic waves, .

In addition, by applying the present invention to various electronic apparatuses, it is possible to reduce the electromagnetic waves emitted through the slots of the electronic apparatuses so as not to cause electromagnetic interference to other electronic apparatuses, and also to reduce the amount of electromagnetic waves exposed while users use electronic apparatuses have.

1A and 1B are views for explaining an electromagnetic wave reducing apparatus according to an embodiment of the present invention.
2A to 2C are block diagrams illustrating a configuration of a base filter according to an embodiment of the present invention.
3 is a block diagram showing the configuration of a connection filter according to an embodiment of the present invention.
4 is a view illustrating a combination of a base filter and a coupling filter according to an embodiment of the present invention.
5A and 5B are views for explaining the installation of the electromagnetic wave suppressing apparatus according to the embodiment of the present invention.
6A and 6B are graphs showing changes in penetration field strength of the electromagnetic wave suppressing apparatus according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A and 1B are views for explaining an electromagnetic wave reducing apparatus according to an embodiment of the present invention.

1A, the electromagnetic wave abatement apparatus 100 is installed around a slot 20 formed in an electronic device or a security facility 10 and operates as a reactance element, and transmits an electromagnetic wave penetrating into the slot 20 Reduce or block.

At this time, the groove formed in the base filter 110 and the protrusion formed on the edge of the slot 20 are combined to provide the electromagnetic wave abatement device 100. A plurality of base filters 110 are installed at symmetrical positions with respect to the slots 20, and two base filters 110 are installed in a pair.

Also, as shown in FIG. 1B, the electromagnetic interference suppressing apparatus 100 may further include a connection filter 150. When the electromagnetic wave abatement apparatus 100 further includes a connection filter 150, the connection filter 150 is connected in series with the base filter 110 installed as shown in FIG. 1A. One or more connection filters 150 may be connected to the installed base filters 110.

Hereinafter, the electromagnetic wave reducing apparatus according to the embodiment of the present invention will be described in more detail with reference to FIGS.

2A to 2C are block diagrams illustrating a configuration of a base filter according to an embodiment of the present invention.

As shown in FIG. 2A, the base filter 110 has at least one coupling groove 113 formed at one side thereof for coupling with a protrusion formed around the slot 20. It can be installed at the edge of the slot without physically damaging the opening area of the slot 20 by using the defect groove 113. [

The base filter 110 is provided in the vicinity of the slot 20 by being coupled with the protrusion formed around the slot 20 because the coupling groove 113 is formed in the base filter 110. However, In a contact or noncontact manner in a manner that does not damage the slot 20.

The base filter 110 is made of a dielectric material or a magnetic material, and the conductor 111 is inserted in the longitudinal direction of the base filter 110. At this time, the conductor 111 may be a conductor line or a conductor plate.

As shown in FIGS. 2B and 2C, the base filter 110 may be formed with coupling grooves 113 or coupling protrusions 115 on the other side for coupling with the coupling filter 150. Here, the coupling protrusion 115 may be formed of a non-metal body.

As shown in FIG. 2B, when the coupling groove 113 is formed on the other side, when the coupling protrusion 115 is formed on the other side as shown in FIG. 2C, the coupling protrusion 115 is coupled with the coupling protrusion formed on the coupling filter 150 And engages with the coupling groove formed in the coupling filter 150.

Next, Fig. 3 is a configuration diagram showing the configuration of a connection filter according to an embodiment of the present invention.

3, the connection filter 150 is made of a dielectric or a magnetic material in the same manner as the base filter 110, and the conductor 151 is inserted in the longitudinal direction of the coupling filter 150. At this time, the conductor 151 may be a conductor line or a conductor plate.

The coupling filter 150 has coupling protrusions 155 or coupling grooves 153 for coupling with the base filter 110 on one side and a coupling protrusion 155 or coupling groove 153 for coupling to the other coupling filter 150 on the other side. The engaging groove 153 or the engaging projection 155 may be formed.

4 is a view illustrating a combination of a base filter and a coupling filter according to an embodiment of the present invention.

As shown in FIG. 4, the base filter 110 and the connection filter 150 are connected in series. The coupling groove 113 formed on one side of the base filter 110 is engaged with a projection formed in the periphery of the slot 20. The coupling groove 113 or the coupling protrusion 115 formed on the other side of the base filter 110 is coupled with the coupling protrusion 155 or the coupling groove 153 formed on one side of the coupling filter 150.

The electromagnetic wave abatement apparatus 100 according to the embodiment of the present invention can be implemented by providing a pair of or a plurality of pairs of base filters 110 around the slot 20, Filter 150 may be connected.

The connection filter 150 connected to the base filter 110 is not limited to the connection filter 150 and may be connected to the connection filter 150 coupled to the base filter 110. [ So that the electromagnetic wave abatement apparatus 100 can be implemented.

At this time, the number of connection filters 150 coupled with the base filter 110 is determined according to the wavelength of the frequency to be cut out of the electromagnetic waves penetrating into the slot 20, or the number of connection filters 150 connected to the base filter 110 or the connection filter 150 are determined.

For example, the base filter 110 and the coupling filter 150 may be manufactured in various lengths such as 0.05 wavelength, 0.1 wavelength, and 0.2 wavelength corresponding to the wavelength of the frequency to be cut off. The base filter 110 and the connection filter 150 may be formed in various lengths of 5 mm, 10 mm, and the like.

It is possible to construct the electromagnetic interference suppressing apparatus 100 optimal for the frequency to be intercepted by constructing the base filter 110 and the coupling filter 150 in various lengths and coupling them. That is, when the base filter 110 and the coupling filter 150 are coupled to each other to adjust the length to be about 0.278 wavelength, the optimum electromagnetic wave reducing apparatus 100 can be constructed.

For example, when the target frequency to be blocked is determined, a pair of base filters 110 may be installed to have a length of about 0.278 wavelength to implement the electromagnetic wave abatement device 100, and a base filter 110 having various lengths, And the filter 150 may be combined to implement the electromagnetic interference canceling apparatus 100.

Hereinafter, the installation of the electromagnetic wave reducing apparatus according to the embodiment of the present invention will be described in more detail with reference to FIGS. 5A and 5B.

5A and 5B are views for explaining the installation of the electromagnetic wave suppressing apparatus according to the embodiment of the present invention.

5A, when the rectangular shaped slot 20 is formed in the electronic device or the security installation 10, the electromagnetic interference canceling apparatus 100 is installed around the center of two opposing sides of the rectangular slot 20 do.

When one or more pairs of electromagnetic wave suppressing apparatuses 100 are installed, the electromagnetic wave suppressing apparatuses 100a, 100b, and 100c are arranged around the slot 20 at equal intervals as shown in the right side of FIG. 5A.

5b, when the circular slot 20 is formed in the electronic device or the security installation 10, the electromagnetic interference canceling apparatus 100 is installed at a position corresponding to the center of the circular slot 20 .

When a plurality of pairs of electromagnetic wave suppressing apparatuses 100 are installed, as shown in the right side of FIG. 5B, after the pair of electromagnetic wave suppressing apparatuses 100a are installed, electromagnetic wave suppressing apparatuses 100b, and 100c, respectively.

Also, when the electromagnetic wave-canceling apparatus 100 is installed in the vicinity of the circular slot 20, when a single base filter 110 is provided instead of a pair, resonance occurs at a specific frequency and a large electric field is infiltrated . Therefore, when the electromagnetism reducing apparatus 100 is installed in the circular slot 20, two or more base filters 110 are provided in pairs.

Hereinafter, the performance of the electromagnetic wave reducing apparatus according to the embodiment of the present invention will be described in more detail with reference to FIG.

6A and 6B are graphs showing changes in penetration field strength of the electromagnetic wave suppressing apparatus according to the embodiment of the present invention.

FIG. 6A is a graph showing the penetration field strength according to the frequency when the electromagnetic interference canceling apparatus 100 is not provided, and FIG. 6B is a graph showing the penetration field strength according to the frequency when the electromagnetic interference cancelling apparatus 100 is installed .

6A, when the electromagnetic interference canceling apparatus 100 is not provided, the slot 20 is effectively excited at a frequency of a length where the slot 20 resonates, so that the electric field distribution of the slot 20 becomes large in size. This causes a very large electromagnetic wave to penetrate through the slot 20.

However, when the electromagnetic wave abatement apparatus 100 is provided, the magnitude of the electric field distribution of the slot is controlled as shown in FIG. 6B, and the penetrating electromagnetic wave is effectively reduced.

As described above, by using the electromagnetic wave abatement apparatus according to the embodiment of the present invention, it is possible to reduce the size of the electromagnetic wave penetrating through the slot formed in the electronic device or the security facility, thereby achieving perfect electromagnetic wave shielding, EMI) can be prevented.

In addition, it is applied to EMP protection facilities or electromagnetic shielding rooms to block electromagnetic waves penetrating into slots formed in EMP protection facilities or electromagnetic shielding rooms, thereby minimizing loopholes that can penetrate electromagnetic waves, .

In addition, by applying the present invention to various electronic apparatuses, it is possible to reduce the electromagnetic waves emitted through the slots of the electronic apparatuses, thereby preventing electromagnetic interference from occurring in other electronic apparatuses and reducing the amount of electromagnetic waves have.

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, Of the right.

10: Electronic equipment or protection facilities
20: slot 100: electromagnetic wave reduction device
110: base filter 111: conductor
113: coupling groove 115: coupling projection
150: connection filter 151: conductor
153: engaging groove 155: engaging projection

Claims

An electromagnetic wave abatement apparatus for reducing an electromagnetic wave penetrating through a slot formed in an electronic device or a security facility,
And a base filter installed around the slot,
Wherein the base filter comprises:
Wherein at least one coupling groove for coupling with a projection formed in the periphery of the slot is formed on one side surface and a conductor line or a conductor plate is inserted in the longitudinal direction.

The method according to claim 1,
And at least one connection filter connected in series to the other side of the base filter.

3. The method of claim 2,
Wherein the base filter comprises:
And an engaging groove or engaging projection is formed on the other side,
Wherein the coupling filter has coupling projections or coupling grooves formed on one side surface thereof and coupling grooves or coupling projections formed on the other side surface thereof.

3. The method of claim 2,
The connection filter includes:
Wherein a conductor line or a conductor plate is inserted in the longitudinal direction.

3. The method of claim 2,
Wherein the number of connection filters is determined corresponding to a wavelength of a frequency to be cut off or the length of a coupling filter coupled to the base filter or the base filter is determined.

3. The method of claim 2,
Wherein the base filter or the coupling filter is made of a dielectric material or a magnetic material,
And the coupling protrusion formed on the base filter or the coupling filter is a non-metallic body.

The method according to claim 1,
And a plurality of said base filters are installed at symmetrical positions with respect to said slot.