KR19990064049A - Window glass with electronic shield performance - Google Patents

Abstract

Electromagnetic shielding is possible by selecting only the radio waves of the required frequency band, and there is no need to conduct conductive treatment with a conductive material such as a surrounding metal bush, and the electronic shield can be easily performed even for an already installed one.

The line-shaped antenna element 5 having a length that resonates with the radio wave to be shielded is used as an electromagnetic shielding element, and the glass is regularly released in consideration of the electromagnetic field reflection area (scattering opening area) or electromagnetic field reflection field (scattering opening volume). It is arranged between the surface or the glass plate and scatters the radio waves with this linear antenna element 5 to attenuate it.

Description

Window glass with electronic shield performance

The use of electronic shields in buildings, inside buildings, or inside vehicles is necessary for the reuse of frequencies, interference prevention of radio waves, and communication security. It is demanded from the purpose.

For example, in case of establishing indoor business PHS (self-employment-indoor only) or Wireless-LAN (wireless LAN) in a specific indoor area, all of them are manufactured on the basis of technical standards, and the technical contents are disclosed and analyzed. Therefore, the communication information used for indoor service is easily accessed from the outside, thereby making it possible to waterproof the communication contents.

In the PHS terminal, which is also used for public use, it is very difficult to protect leakage of communication contents by encryption. Therefore, the only way to maintain security is to use an electronic shield that prevents leakage of radio waves outside the communication area.

In addition, due to the limited number of available frequency channels, shielding is necessary to ensure that radio waves can not be emitted depending on the region of use in order to secure as many uses as possible.

In addition, the necessity of the electronic shield is to prevent the electromagnetic waves from interfering with medical devices or patients in the medical field, such as hospitals, or to cause inconvenience to others, or to use the mobile phone in a public area such as a restaurant or a car. It is also necessary to prevent the mobile phone from operating in cases where it is necessary to quiet the audience at concert halls or the like.

Electromagnetic shields for radio waves are already widely used today, and many studies have been conducted by metal plates, metal meshes, or radio wave absorbers.

For example, as the electromagnetic shield of a building structure, conventionally, each floor has sufficient electromagnetic shielding by deck plates or other steel plates, and the microwave band is adhered to the part of the outer wall and the tenant without any gaps between copper foil and metal mesh. Also in (iii), effective electronic shielding takes place.

On the other hand, the glass window is difficult to shield electrons even from ensuring light transmittance. Therefore, in order to perform electronic shielding, all windows of the building may be removed to form a wall surface, and the wall surface may have the electron shield structure. However, in this case, there is no vision, resulting in an environment with a sense of closure.

In addition, in order to implement an electronic shield structure on the window glass, a gold screen is put inside, but for example, a shielding wire of about 0.1 mm is required for the electromagnetic shielding of radio waves (frequency of 1.9 GHz) used in PHS. Although shielding is done, it may damage the transparency, which is not good for the residential environment.

As another example of applying an electron shield structure to a window glass, it is practical to laminate an ultra-thin metal deposition film such as tungsten or aluminum over the entire glass surface or inside. It is known that this method can attenuate up to 20 to 30 dB (= 1/100 to 1/1000) for PHS (1.9 GHz) or wireless LAN (2.45 GHz). According to this, since it can suppress by 30 to 35% reduction with respect to visible light, there is no visual restriction.

However, in this way, it is possible to shield the invading radio wave from the outdoors without damaging the feeling of liberation of the mined building, and since it shields over the whole range of frequencies, it is secured, but it is difficult to shield it. For example, public communication such as public cell phones, pagers, various broadcasts, emergency communication of police or firefighting, and wireless communication are shielded.

An object of the present invention is to solve the problems of the prior art and to select only the radio frequency band of the required frequency without damaging the lightness and visibility, it is possible to electromagnetic shield, and also the conductive material of the gap between the electronic shield members such as metal frame of the window frame An object of the present invention is to provide a window glass having an electromagnetic shielding performance that does not require conduction or grounding.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to having electromagnetic shielding performance in various window panes such as window panes used for windows of buildings, and window panes of vehicles such as automobiles and trains, and windshield panes such as membranes and boxes.

1 is a perspective view showing a first embodiment of a window pane of the present invention.

Fig. 2 is a front view of the main portion showing the first embodiment of the window pane of the present invention.

3 is an explanatory diagram in a case where a line antenna element is short-circuited;

4 is an explanatory diagram of a 1 showing the principle of the electron shielding method in the window glass of the present invention;

5 is an explanatory diagram of a 2 showing the principle of the electron shielding method in the window glass of the present invention;

6 is a front view of a window glass on which line antenna elements are arranged;

Fig. 7 is a perspective view showing a second embodiment of the window pane of the present invention.

Fig. 8 is a front view of the line antenna element in the second embodiment.

9 is a graph showing the results of experiments on the performance confirmation of the window glass of the present invention in which a Y-shaped line antenna element is disposed.

Fig. 10 is an explanatory diagram showing the arrangement in the case where the linear antenna element is crosswise;

Fig. 11 is an explanatory diagram showing a modification of the ring-shaped line antenna element.

Fig. 12 is an explanatory diagram showing a modification of the line-shaped antenna element of open end shape;

Fig. 13 is a front view showing a modification of the end-shaped line antenna element.

Fig. 14 is a perspective view showing a third embodiment of the window pane of the present invention.

Fig. 15 is a plan view showing one example of a combination of a ring-shaped line antenna element and an open end portion of the line-shaped antenna element.

FIG. 16 is a graph showing the electron shielding effect of the linear antenna element shown in FIG. 13; FIG.

Fig. 17 is an explanatory diagram showing a modification of the combination of a ring-shaped line antenna element and a terminal open-shaped line antenna element.

Fig. 18 is an explanatory diagram showing an example in which end portions of linear antenna elements of different lengths are knit together;

Fig. 19 is an explanatory diagram showing an example in which the lengths of the loop-shaped antenna elements of the annular line shape are knit together;

20 is an explanatory diagram showing an example of a combination of linear antenna elements for three frequency bands;

21 is an explanatory diagram of an experimental facility for confirming shielding performance of gaps between window panes;

Fig. 22 is a front view of the experimental apparatus for viewing the relationship between the array spacing and the attenuation amount of the linear antenna element.

Fig. 23 is a longitudinal sectional side view of the experimental apparatus for showing the relationship between the array spacing and the attenuation amount of the linear antenna element;

Fig. 24 is a graph showing experimental results of the relationship between the array spacing and the amount of attenuation of the linear antenna element.

In order to achieve the above object, the present invention first uses a line-shaped antenna element having a length (electric field) to be resonated with a radio wave to be shielded as an electromagnetic shielding element, and has an electric field reflection equivalent area or volume, that is, a reflection region of the radio wave, without a gap. In consideration of overlapping, it is essential that each antenna element is regularly arranged between a glass surface or a glass plate, and the radio waves are scattered by this linear antenna element and attenuated accordingly.

Secondly, the linear antenna element has an open end portion and has a quarter wavelength (half wavelength in a single strand shape) of a radio wave to shield the length (electric field) of one side extending from the center. The shape of the line shape is to make the surrounding field (electric field) the same as the wavelength of the radio wave to be shielded.

Third, two or more kinds of line antenna elements having different dimensions and shapes are arranged and arranged, and end-open line-shaped antenna elements and annular line-shaped line antenna elements are interwoven, and end-opening line-shaped antenna elements are lengthened. The idea is to put together different pieces or to put together pieces of different lengths between the loop-shaped antenna elements.

Fourth, the open end antenna element is arranged near the center of the adjacent line antenna element, and the open end antenna element has an annular line shape. It is.

Fifth, it is the point of determining the array spacing between the linear antenna elements in consideration of the attenuation relationship.

Sixth, the linear antenna element should be selected to have a low volume resistivity according to the required shielding performance, preferably 5 x 10 ^-8 (Ωm) or less, and the linear antenna element has excellent conductivity, durability, It is made to integrate with glass by incorporating a material excellent in weather resistance, for example, silver and in a small quantity, for example about 5% of glass.

According to the present invention of Claims 1 to 3, the linear antenna element reflects not only the area occupied by the metal part of the antenna but also the electromagnetic energy in the range near the metal part in a wide range. In addition, the electronic shielding can be performed by arranging the linear antenna element in a planar or three-dimensional manner in space or on a non-conductive material in consideration of the electromagnetic field reflection equivalent area or equivalent volume. Moreover, since it does not cover the whole surface at intervals, neither light property nor visibility is impaired.

In addition, the patterned small linear antenna element can shield a specific frequency by specifying its length, and as a result, it transmits other radio waves, so that information from outside, such as radio and television radio waves of police, fire fighting radio, etc. can be collected. This radio wave is not shielded, and only the specific radio wave used inside the building can be prevented from being leaked, thereby improving the security and reusing the frequency channel.

In this way, since most of the linear antenna elements are shielded by the reflection loss, and the absorbed (received) power is absorbed mostly by the heat loss, the linear antenna elements do not need to be connected to the metal frame of the window frame and grounded. Not limited to conductive connection, free setting is possible.

Moreover, in actual radio waves, the polarization planes are not uniform and have various inclinations. However, if the linear antenna element is in the shape of a ring-shaped line or an end opening shape having directionality, it is possible to cope with the propagation of all polarization planes.

According to the present invention described in claims 4 to 7, the radio wave of various frequency bands can be electromagnetically shielded by regularly arranging line-shaped antenna elements of different lengths. It can respond. For example, in the case of a mobile phone, an electronic shield can be applied to all two frequency bands distributed between 900 MHz and 1.5 GHz bands.

According to the present invention of the eighth aspect, the high and low electric fields of the linear antenna elements are arranged to be close to each other, whereby the high electric fields are close to each other to prevent mutual interference between the devices. In addition, the attenuation can be increased by increasing the device density.

According to the present invention of the ninth aspect, the open end portion of the linear antenna element can increase the reflection equivalent area by the annular line portion of the linear antenna element, thereby enabling high bandwidth and high attenuation.

In order to secure a high amount of attenuation, it is preferable to arrange the antenna antennas in close proximity to each other. On the other hand, when the antennas are placed on the glass surface in close proximity to each other, a visual problem is caused. According to the present invention of claim 10, it is found that there is a correlation between the arrangement interval of the linear antenna elements and the amount of attenuation, and the arrangement intervals of the linear antenna elements are determined from the amount of attenuation required. A large gap can be secured to provide better visibility on the glass surface.

In order to secure a high attenuation amount, it is desirable to lower the loss resistance of the linear antenna element. In this case, it is desirable to reduce the loss resistance by increasing the line width. However, increasing the line width of the linear antenna element impairs the optical transmittance of the glass surface when it is arranged. In the case where the line-shaped antenna element has a line width of about 0.5 mm, according to the present invention of claim 11, preferably, the volume resistivity is 5 X 10 ^-8 (Ωm) or less, thereby ensuring sufficient performance.

Similarly, in order to make the loss resistance of the linear antenna element considerably low in order to secure a high amount of attenuation, it is desirable to employ a material having low electrical resistance. Copper, silver, and gold are optimal elements of the linear antenna element, but gold has a high cost, and copper has an increase in resistance due to oxidation. According to claim 12, the price is not so high and the silver does not have to worry about an increase in resistance due to oxidation. The glass is incorporated in a small amount, for example, by incorporating about 5% of glass, thereby integrating the glass and improving the life of the linear antenna element. You can do as much as

Next, embodiments of the present invention will be described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a first embodiment of a window glass having an electromagnetic shielding performance of the present invention, in which 1 is a window glass and 2 is a saddle, and a line shape of a length corresponding to the frequency of radio waves to be shielded is shown. The antenna element 5 is arranged regularly on the window glass 1 in consideration of the electromagnetic field reflection equivalent area or volume, and the radio wave is attenuated by the linear antenna element 5.

First, the basic principle related to this invention is demonstrated. When a piece of conductor is in the air, when a radio wave enters this surface, some of it is reflected, some is absorbed, and others is transmitted. The amount of attenuation of radio waves by this conductor piece varies with the shape and size of the conductor piece. As shown in Fig. 3, assuming that the conductor piece is a linear antenna element (dipole) 3 having an open end, part of the conductor is absorbed while being absorbed.

As shown in Fig. 4, the dipole antenna element 3 having a half-wavelength lambda / 2 placed in parallel with the planar electromagnetic field not only receives the electromagnetic energy but also the electromagnetic field near the metal surface. It is absorbing. The spread is not uniform, but the equivalent cross-sectional area Ae is calculated by the following equation.

(Equation 1)

Ae ≒ 0.13λ ² (area of λ / 2 X λ / 4)

About three quarters of the electromagnetic waves in the range of the equivalent cross-sectional area Ae are reflected and about one quarter are received power. This is the effective opening.

As shown in Fig. 5, when the reception input resistance of the half-wavelength (λ / 2) line-shaped antenna is set to 0, an antenna element with no ideal loss is reflected in space, and the equivalent area is the effective value. 4 times the opening (scattering opening), and the element by the linear antenna element 3 is arranged on the window glass 1 as shown in Fig. 6 according to the equivalent area 4 X Ae (scattering opening). It exhibits a radio wave reflecting effect such as attaching a metal film. Antenna elements generally have a frequency dependence, but their characteristics and receiving end resistance = 0 are the basic operation of the element by this linear antenna element 3, and if there is any loss in the linear antenna, part of the radio wave is power, Is absorbed.

In addition, since the linear antenna element 3 is scattered, the light and visibility of the window glass 1 are not impaired. In addition, the thickness of the conducting wire constituting the linear antenna element 3 is selected to be thin and low in loss so as not to obstruct the visual field.

However, 1885-1950 MHz is the frequency band of current personal communication (PHS-JAPAN., PCS-US.DECT-Europe) and FPLMTS (Futue Public Land Mobile Telephone System), which has been practical since 2000, and 2420-2480 MHz is the ISM set by ITU. It is assigned to wireless LANs in buildings in the industrial bands for industrial-scientific-medical, scientific and medical applications, and is also used in linear accelerators for microwave and high-power nondestructive testing.

In the case of PHS, when the frequency is 1.90 GHz, the wavelength is λ = about 158 mm. In the case of the wireless LAN, when the frequency is 2.45 GHz, the wavelength is λ = about 122 mm. Equivalent to = 12,980 mm ² (PHS), 4 X Ae = 7,740 mm ² (LAN), which may be arranged or dotted on a regular basis in consideration of the electromagnetic reflection equivalent area 4 X Ae between the glass surface or the glass plate.

However, as shown in FIG. 6, the arrangement of the linear antenna elements 3 in a horizontal row does not correspond to various polarization planes in which the polarization plane of the actual radio wave is not in this horizontal row. Thus, the linear antenna element 3 has an open end shape or an annular line shape having a directionality described later. By doing in this way, the slope of all sides can respond to the other wave.

1 and 2 show a first embodiment of the present invention, in which the linear antenna 5 has an open end shape and the wavelength of the electromagnetic wave to be shielded is λ, equivalent to when the linear antenna elements are arranged on a glass surface. When the relative permittivity was set to εq, the length of one side was about λ / (4√εq). That is, since epsilon q is 1 in air, the length of one side extending from the center 5a becomes 1/4 wavelength of the radio wave to be shielded. However, when the linear antenna 5 is placed on the glass, the length of one side is changed by the induction rate of the glass or the interface.

As the window glass 1 for providing the linear antenna element 3 or the linear antenna element 5, float glass or gray pen glass or the like is preferable, and the linear antenna element 3 or line is formed between the glass surface or the glass plate. As a method of regularly arranging the shape antenna 5 in consideration of the electromagnetic field reflection equivalent area of the antenna element, a method of printing metallic paste silk such as silver, copper, and gold, or adhesion of a film film has been proposed.

Among these, adhesion of a film film can also prevent scattering at the time of glass breakage, or adjust the amount of insolation. It is also relatively inexpensive because it can be added after construction. As the film material, a line-shaped antenna 5 is provided on a synthetic resin film such as polyimide film, polyester film, polyethylene film, etc. by an etching method, a lamination method, or a screen printing method as a line pattern and attached to glass or the like.

The etching method is performed by the same method as a general printed circuit board using a copper foil attached to a film as a breccitable substrate as a substrate and dissolving the remaining portion by masking the pattern portion with a solvent. On the other hand, the screen printing method forms a circuit pattern by performing metal paste printing, such as silver and gold, on a base material.

In order to confirm the performance of the electromagnetic shielded glass which arrange | positioned the said Y-shaped linear antenna 5, the experiment result by carrying out plastic printing of the linear antenna 5 by silver paste on the glass surface is shown in FIG.

The maximum attenuation was 35dB (central frequency 1.9GHz), and the target 30dB attenuation bandwidth was about 35MHz, which proved to have sufficient shielding performance for the PHS propagation band.

In Table 1, the glass making method is shown in Table 2.

Item Way Substrate Glass Gray Pen Glass 60cm X 60cm Thickness 8mm Element Silver Paste Plastic Printing (Ag: 95%, Other Glassy 5%) Line Length 21mm Line Width 0.5mm

Item summary Measurement method Insertion loss method by opening of radio wave room (opening dimension 110cm X 50cm) Instrument Transmitter: Synthesized Sized Receiver: Spectrum Analyzer Antenna: W rigid guide phone antenna Measuring distance 60cm, 200cm angle of incidence 0 °, 60 ° Polarization plane Vertical and horizontal polarization

FIG. 10 shows a case where the linear antenna element 5 is a rectangular, 10-shaped element. In this case, the center 5a is a place where the potential is low, and the end of each side 5b is a place where the potential is high. In comparison with the case of FIG. 10, in the case of FIG. 2, a triangle having a high potential and a low potential of the line antenna element 5 is disposed to prevent the mutual interference between the elements due to the proximity of the high potential. can do. In addition, the device density can be increased by arranging in a triangle.

FIG. 12 shows such a modification of the open end linear antenna element 5. The straight one shown on the left is equal to half the wavelength of the radio waves to be shielded.

In addition, the window glass 1 in which the linear antenna elements 5 are arranged can be sufficiently coped even when there is a part without the antenna element 5 in an arrangement portion such as a packing between the glass faces (gaps between the glasses). It was confirmed in the experimental results. According to this, the shield center frequency variation due to the change of the glass gap size can be seen slightly, but the shield yaw component performance can be satisfied up to about 30 mm.

In this experiment, a radio wave is transmitted at a constant output from an antenna of an indoor room of a shielded room having an opening (51 cm wide x 111 cm high) shown in FIG. 21, and radio waves are received from an outdoor antenna of the shielded room. The received field strength when the window glass 1 of the present invention was squeezed out and the gap between the window glasses 1 was changed was measured by a spectrum analyzer.

However, first, the linear antenna element 5 is arranged on the window glass 1 in consideration of the electromagnetic field reflection equivalent area or volume, and the radio wave is attenuated by the linear antenna element 5, but the linear antenna element ( 5) The optimum spacing can be determined by considering the amount of attenuation required.

In order to secure a high amount of attenuation, it is preferable to arrange the linear antenna elements 5 in close proximity to each other. On the other hand, if the antennas 5 are arranged in close proximity to the glass surface of the window glass, they cause visual problems.

22 and 23 are experimental apparatuses for viewing the relationship between the arrangement interval and the amount of attenuation of the linear antenna elements, but the copper rods were determined by looking at the linear antenna elements to obtain the correlation shown in FIG. 24.

Therefore, the linear antenna elements 5 mutually determine the array spacing in consideration of the attenuation relationship and determine the arrangement spacing between the linear antenna elements from the amount of attenuation required. It is possible to secure better visibility on the glass surface.

In the results of the experiment, the material of the linear antenna element 5 was silver-paste plastic printing and the line width was 0.5 mm, but the linear antenna element 5 had a volume resistivity of 5 x 10 ^-8 (Ωm) or less. desirable.

In order to secure a high amount of attenuation, it is desirable to make the loss resistance of the linear antenna element extremely low. In this case, it is preferable to reduce the loss resistance by widening the line width and to adopt a material having good conductivity. However, increasing the line width of the linear antenna element impairs the optical transmittance of the glass surface when it is arranged. In the case where the line-shaped antenna element has a line width of about 0.5 mm as described above, according to the present invention of claim 11, sufficient performance can be ensured if the volume resistivity is at least 5 × 10 ⁻⁸ (Ω · m) or less.

Copper, silver, and gold are the most suitable materials for low electric resistance, but gold has a high cost and copper has an increase in resistance due to oxidation. By employing silver as described above, the price is not so high and there is no fear that the resistance value will increase due to oxidation. In addition, by incorporating about 5% glass, the glass can be integrated with glass to achieve the life of the linear antenna element as glass.

7 and 8 show an example of a Y-shaped ring line in the case of a line-shaped antenna element having a ring-shaped line instead of the open end-shaped antenna element 5 having an open end. 11 shows a modified example of the line-shaped antenna element 4 in the shape of a ring-shaped line. Various shapes such as triangles, squares and other polygons and circles can be considered.

This ring-shaped line antenna element 4 is equal to the wavelength of radio waves to shield the surrounding field (electric field). Precisely, when the wavelength is lambda and the equivalent dielectric constant is epsilon, the linear antenna element 4 has a ring of approximately lambda / √ε around.

This ring-shaped line antenna element 4 should be thinner in line width than the end-shaped line antenna element 5, and the capacitance component of the element shorter than [lambda] / 4 of the end-open line antenna element. Is canceled by the inductance of the feedback loop to obtain the resonance condition. Although the radiation resistance is low, the effect of the return line is four times higher.

Because of the short device, the electric field is low and the influence of the dielectric constant on the glass can be reduced, and when the loop width is expanded, the Zob (the property of parallel two-wire characteristics) is increased, thereby reducing the influence of the glass. In addition, when the width is widened, a wide band can be realized by a line having an equivalent radius.

FIG. 13 shows a modified example of the open end-shaped antenna element 5 so that the portion of the linear antenna element 5 is a ring-shaped line shape 5c. It is set as a composite type in which a ring-shaped line antenna element is incorporated in a part of a so-called open end-shaped antenna element.

In this way, the thin lines can be used in multiple parallel lines to increase the reflecting surface area, and at the same time, to reduce the high frequency loss resistance without deteriorating the transparency, thereby enabling high bandwidth and high attenuation.

For example, in mobile phones, there are two kinds of frequency bands, 900 MHz band and 1500 MHz band. Similarly, the PHS has a frequency of 1.9 GHz and the wireless LAN has a frequency of 2.45 GHz. In order to perform electromagnetic shielding on these radio bands, it is necessary to correspond to a plurality of frequency bands.

Fig. 14 is a perspective view showing an embodiment of the electromagnetic shielding method having such multiple frequency band correspondences, in which line-shaped antenna elements having different lengths are woven together and arranged regularly. In this embodiment, the line-shaped antenna elements 4 of the annular line shape and the line-shaped antenna elements 5 of the open end shape are arranged regularly in consideration of the equivalent electromagnetic field reflection area (volume). As shown in the figure, the open antenna element 5 is Y-shaped, and the ring-shaped line antenna element 4 is an equilateral triangle. In addition, although the linear antenna element 3 was made into a double, it may be made into a single.

In addition, the linear antenna element 5 enters into the linear antenna element 4 without connection. By doing this, the interference between the elements can be reduced. Although FIG. 16 shows the electron shielding effect of the linear antenna elements 4 and 5 shown in FIG. 15, the vertical axis represents attenuation and the horizontal axis represents frequency. (DDS is the case where the linear antenna element 3 is double, and SDS is the one).

Fig. 17 shows a modification of the combination of the ring-shaped line antenna element 4 and the open end line-shaped antenna element 5. In the figure, the code | symbol a is an example of bending the edge part.

In addition, as an electromagnetic shielding method having multiple frequency band correspondences, as shown in FIG. 18, when the length of the open end antenna elements 5 of different end shapes are interwoven, or as shown in FIG. 19, a line-shaped line shape as shown in FIG. It is also possible to knit the antenna elements 4 with different lengths.

20 shows an example of a combination of line-shaped antenna elements for three frequency bands corresponding to multiple frequency bands.

Moreover, although the said Example demonstrated the window glass used for a building window, it can be applied also to the window glass of vehicle, such as a car and a train, and the window glass of household appliances, such as a part tension and a box.

As described above, the window glass of the present invention can shield only the radio waves of the frequency band according to the length of the antenna element and transmit the radio waves other than this, so that the electromagnetic shield can be selected by selecting only the radio band of the required frequency.

In addition, shielding of up to 40dB is possible and the reflection area around the antenna element allows shielding performance to be secured even if there is a certain gap, and the line of the antenna element can be thinned. none.

In addition, it is not necessary to perform the processing of the gap portion between the members which have done this, or the conduction processing by the conductive material for grounding.

Claims (12)

A line-shaped antenna element having a length to be resonated to the radio wave to be shielded is an electromagnetic shielding element, and the glass surface or the glass plate between the glass surface or the glass reflecting field (e.g., scattering opening area) or electromagnetic reflecting equivalent area (scattering opening volume) is considered. And an electromagnetic shielding performance, characterized in that the radio waves are scattered and attenuated by the linear antenna element. The method of claim 1, The linear antenna element 5 has an open end shape and has a quarter wavelength (half wavelength in the case of a single strand) of radio waves intended to shield the length (electric field) of one side 5b extending from the center. A window glass having an electron shield performance, characterized in that. The method of claim 1, The linear antenna element (4) is an annular line-shaped window glass having an electromagnetic shielding performance, characterized in that equal to the wavelength of the radio wave to shield the surrounding field (electric field). The method according to any one of claims 1 to 3, A wire-shaped antenna element is a window glass having an electromagnetic shielding performance, characterized in that the two or more types of line-shaped antenna elements of different types and different sizes and shapes so as to shield a plurality of frequencies are arranged together. The method of claim 4, wherein The linear antenna element is made of various types so as to shield a plurality of frequencies, and the electronic shield characterized in that the end-open line-shaped antenna element 5 and the ring-shaped line-shaped antenna element 4 are woven together Window panes with performance. The method of claim 4, wherein The linear antenna element is a window glass having an electromagnetic shielding performance, characterized in that it is made of a plurality of types so as to shield a plurality of frequencies and the end-opening line-shaped antenna elements (5) of different lengths. The method of claim 4, wherein The linear antenna element is a window glass having an electromagnetic shielding performance, characterized in that it is made of various kinds so as to shield a plurality of frequencies, and that the length of the ring-shaped line antenna elements (4) are combined between different lengths. The method of claim 2, An end-opened linear antenna element (5) is characterized by arranging the ends of each side (5b) closer to the center (5a) of the adjacent linear antenna element. The method of claim 2, The end-shaped linear antenna element 5 is a window glass having electromagnetic shielding performance, characterized in that the linear antenna element portion is a ring-shaped line shape 5c. The method according to any one of claims 1 to 9, A window glass having an electromagnetic shielding performance, characterized in that the mutual antenna shape is determined in consideration of the relationship between the amount of attenuation. The method according to any one of claims 1 to 10, The linear antenna element is a window glass having an electromagnetic shielding performance, characterized in that the volume resistivity of at least 5 X 10 ^-8 (Ω · m) or less. The method according to any one of claims 1 to 11, A wire-shaped antenna element is a window glass having an electromagnetic shielding performance, characterized in that a small amount of glass material is incorporated as a material excellent in conductivity and excellent in durability and weather resistance.