TW200902809A - Radio shielding body - Google Patents

Abstract

A radio shielding body which does not hinder lines of sight comprises a plurality of antennas each of which reflects a radio of a specific frequency. The plurality of antennas are arranged so as to constitute a pattern and are constituted by metal films with an opening.

Description

200902809 IX. Description of the Invention: [Technical Field to Be Invented] The present invention relates to an electric wave shield. [Prior Art]

In recent years, the use of personal hand-held telephone systems (PHS) and wireless local area networks (LANs) within the business center has been used to prevent information leakage and prevent external intrusion. Considering the wrong 1 action and preventing noise, the radio wave brother II in the office of Iton is indispensable. Various types have been proposed as components for rectifying the radio wave environment (e.g., Patent Documents 1, 2, etc.).

Unexpectedly, the metal or ferrite electromagnetic screen shouting parts are added to the large pain body, and the turbidity of the frequency of the Rensi frequency in the wide frequency band is sufficient, and the electric wave of the ice frequency is used in the literature 1, as Electric wave; t Shielding wisdom building... Metal mesh, metal box, etc.: The component 'uses a radio wave absorber composed of an iron plate or a metal mesh. It is considered that the formed radio wave reflector or the ferrite is not dependent on the electromagnetic shielding property: these radio wave reflectors or radio wave absorption Patent Document 4 = rate selectivity. Therefore, the radio wave reflector and the radio wave absorber which are problematicly shielded from the specific frequency I cannot be selectively shielded from the specific frequency: the radio wave reflector and the radio wave absorber cannot be shielded by radio waves. The frequency of the present invention is related to the magnetically shielded building. The electromagnetically shaped conductive linear antenna has a problem. For example, Patent Document 2 discloses that an electrically shielded building is characterized in that the ''Y' character is regularly Arrange to form an electromagnetic shielding surface, benefit 5

200902809 Use this electromagnetic shielding surface to ensure the space of electromagnetic shielding in the building. The "Y"-shaped wire antenna is composed of three element portions which are radially extending from the center of the antenna. It is described that, according to the electromagnetic shielding building disclosed in Patent Document 2, it is possible to select electromagnetic waves of a necessary frequency for electromagnetic shielding. [Patent Document 1] Patent Document 1: Japanese Patent Publication No. 6 - 9 9 9 7 2 Patent Document 2: Japanese Patent Laid-Open No. Hei 1 0 - 1 6 9 0 3 9 [Invention] A problem is solved in order to rectify the building In the radio wave environment inside the object, it is necessary to arrange a wire antenna on a transparent member such as a window glass. However, if the wire antenna is disposed on the window glass, the focus of the person's eye in the room is always easy to put on the geometric pattern formed by the wire antenna, and it is difficult to place the focus on the opposite side of the window. Therefore, there will be such a problem that it is unpleasant to people in the room. Moreover, there is a problem of poor appearance in a ubiquitous office that emphasizes beauty. In view of such a problem, for example, a method of transparently forming a linear antenna such as a transparent conductive oxide such as indium tin oxide (IT0) or indium oxide (IZ0) can be considered. However, since the transparent conductive material such as a transparent conductive oxide has a low electrical conductivity, when a linear antenna is formed of a transparent conductive material, there is a problem that it is difficult to achieve desired radio wave shielding characteristics. Moreover, as another method, it can also be considered to be formed to be extremely thin 6

200902809 Method of wire antenna composed of metal film. However, in order to form an extremely thin metal wire antenna that will enter the eyeliner of a person who enters the room, it is necessary to form an extremely thin metal film, and then to obtain a high-precision patterning of the obtained metal film, which is technically and cost-effective. In view of the above, the present invention has been made in view of the above problems, and an object thereof is to provide a radio wave shield which is less likely to cause obstruction of a line of sight. - Solution 1 The radio wave shield according to the present invention is configured such that a plurality of antennas that distribute radio waves of a specific frequency form a pattern. Each antenna is composed of a metal film having a mouth. In addition, the term "metal having an opening" means a planar-line-shaped metal film formed into a planar checkered shape (triangular grid shape, hexagonal lattice shape, or square lattice shape) or the like, and has a complex planar shape. The metal of the fine holes (or the planar view ellipse or the planar view polygon) is formed into a film having a planar view (as a dot, such as a circle or a polygon). Therefore, the antenna transmits light to some extent, and it is difficult to stay. In view of the above, the area ratio of the metal film to the antenna is preferably 30% or less in view of the fact that the radio wave shield of the present invention is less likely to cause the line of sight of the present invention. Preferably, the metal film is highly conductive, such as a selected one selected from the group consisting of silver, copper, and aluminum, or an alloy of the selected metal selected from the group consisting of silver, copper, and m. The shape of each antenna is not particularly limited. For example, the antenna may not be first patterned: "Do not open the film" Lins sees the round film, metal, this. From :.5% with metal less 1 to be 7

200902809 has: a first element portion having three line segments having substantially the same length, which are radially extended from the center of the antenna at an angle of 120°; and a second element portion in the form of a line segment The outer ends of the first element portions are coupled to each other (hereinafter, the following antennas are referred to as "Y_T type antennas", that is, "the first element portions having three line segments having substantially the same length, which are mutually formed from the center of the antenna 1 2 0 The angle of ° extends radially; and the second element portion in the form of a line is joined to the outer end of each of the first element portions"). Further, it may be an antenna composed of a plurality of line-like element portions each extending at substantially the same angle from the center of the antenna (e.g., 1 2 0 °) and extending substantially in the same length (e.g., three). It may be a cross-shaped antenna, that is, a first element portion having four line segments extending radially at substantially the same length from the center of the antenna at a 90° angle, and combined with the outer ends of the respective first element portions. The second element portion in the form of a line segment. Among these antennas, the Υ-Τ antenna has a particularly high frequency selectivity, so the Υ-Τ antenna is particularly desirable when high frequency selectivity is required. Further, from the viewpoint of achieving high frequency selectivity, it is preferable to arrange the Υ-Τ type antenna such that the second element portions are disposed to face each other (more preferably, they are closely and in parallel) A plurality of antenna groups are formed for the antenna. Further, it is preferable that the plurality of antennas are arranged such that six antennas in which the second element portions are opposed to each other and arranged in a ring shape constitute a hexagonal complex antenna assembly. If a Υ-Τ type antenna is used, it is preferable that the first element portion and the second element portion are formed to be perpendicular to each other. Further, it is preferable that the center of the second element portion is connected to the outer end of the first element portion. 8

200902809 The length of the first element portion and the length of the second element portion can be appropriately determined by the frequency of the radio wave to be reflected. Specifically, the frequency can be set by increasing the length of the first element portion and/or the second element portion. Further, the specific frequency is increased by shortening the first element portion and/or the second element portion. Further, from the viewpoint of closely arranging the Y-T antenna, it is preferable that the second element portion is shorter than the first element portion. Further, the radio wave shield according to the present invention may be provided with various antennas. For example, it may be a plurality of antennas having the same frequency of reflected radio waves. According to this configuration, it is possible to realize a radio wave shield which can shield a plurality of types of radio waves having different frequencies. Such a shield is particularly suitable for rectifying a radio wave environment of an office using a frequency phase electric wave such as a wireless LAN (in the case of a wireless LAN, such as a radio wave of 2. 4 turns). Further, when a plurality of antennas are formed, these antennas may have mutually different shapes, and may also have non-similar shapes. For example, it is also configured as a "Y" shaped antenna, a cross-shaped antenna, and two or more antennas selected from the group of Y-T type days. For example, when two types of YT antennas having similar shapes are formed, I configure various YT antennas so that hexagonal complex antennas are formed by six antennas in which the second element portions are arranged in a ring shape. Yes, a celestial body composed of a larger YT type antenna is used to surround a smaller antenna set composed of smaller YT type antennas. Preferably, a larger antenna assembly and a smaller antenna set are sufficient. It is said that the reduction of the special length is such that the 5.2MHz phase with the non-selective radio wave screen is similar to the shape line: yes, the opposite row. This line is a collection of fits. Fit and 9 200902809 does not have parallel symmetry axes. In other words, it is preferable that the axis of symmetry of the larger antenna assembly and the axis of symmetry of the smaller antenna assembly are inclined to each other. For example, it is preferable that for the symmetry axis of the larger antenna assembly, the symmetry axis of the smaller antenna assembly is inclined by 2 ° or more and 40 ° or less (preferably 5 ° or more and 2 0 ° or less, more preferably 1 5. Below and 1 0. Above). According to this configuration, the contact of the larger antenna assembly and the smaller antenna assembly will be suppressed. Therefore, this configuration is particularly effective in the case where the frequency of the radio wave reflected by the larger antenna is relatively close to the frequency of the radio wave reflected by the smaller antenna, i.e., the antennas are approximated to each other. Further, the radio wave shield according to the present invention may have a plurality of antennas in which the peaks of the radio wave reflection spectrum are not independent of each other. In other words, it is also possible to have a plurality of antennas in which the peaks of the respective radio wave reflection spectra are continuous. According to this configuration, it is possible to realize a radio wave shield that selectively shields radio waves having a specific frequency band region of a certain frequency width. In addition, "the radio wave reflection spectrum peaks are not independent of each other (continuous)" means the minimum radio wave in the valley between the spectral peaks in the radio wave shielding spectrum (wave reflection spectrum) of the radio shield. The ratio of the reflection (shield) rate to the maximum radio wave reflection (shield) ratio at the mountain (spike) of the spectrum is more than 50% (in other words, the difference between the peak reflectance and the minimum wave reflectance at the valley) Below 3 dB). On the other hand, the so-called radio wave reflection spectrum peaks are independent of each other (not continuous performance), and are the minimum radio wave reflection (shield) ratio of the valley portion located between the spectral peaks in the radio wave reflection (shield) spectrum of the radio wave shield. The ratio of the maximum radio wave reflection (shield) ratio at the mountain (spike) of the spectrum is less than 50% (in other words, the peak of 10)

200902809 The difference between the reflectivity of the wave and the minimum wave reflectance at the valley is greater than 3 dB). In the present specification, the term "the radio wave reflection spectrum peaks are independent of each other (discontinuity)" means the minimum of the valley between the spectral peaks in the radio wave shielding spectrum (wave reflection spectrum) of the radio wave shield. The ratio of the radio wave reflection (shield) rate to the radio wave reflection (shield) rate of the largest spectral peak (spike) is less than 50%. On the other hand, the term "the radio wave reflection spectrum peaks are not independent of each other (continuous)" means the minimum radio wave reflection (shield) ratio in the valley between the spectral peaks in the radio wave reflection (shield) spectrum of the radio shield. The ratio of the radio wave reflection (shield) ratio to the maximum spectrum peak (spike) is above 50%. The radio wave shield according to the present invention is capable of appropriately shielding radio waves having a specific frequency band region having a certain width, and is extremely useful as a partition (separator), a window panel (window glass), an inner wall panel, etc., according to the present invention. It will be possible to realize a radio wave shield that is difficult to obstruct the line of sight. [Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a cross-sectional view showing a radio wave shield 1 according to the first embodiment. In detail, Fig. 1(b) is a cross-sectional view of a portion cut by a line Ia-Ia in a plan view of the radio shield 1 shown in Fig. 1(a). Fig. 2 is a plan view of the radio shield 1 according to the first embodiment. 3 is a plan view showing the shape of the antenna 4. In detail, Fig. 3 (a) is a plan view showing the overall shape of the antenna 4. Figure 3 (b) shows the antenna 4 11

Part of the shape of 200902809 is enlarged by a plan view. The radio wave shield 1 has a substrate (e.g., substrate) 2 and a frequency selective radio wave reflection film 3 formed on the surface of the substrate 2. Further, although the radio wave shield 1 according to the first embodiment is configured by forming the frequency selective radio wave reflection film 3 on the surface of the substrate 2, the present invention is not limited by such a structure, such as frequency selective radio wave reflection. The film 3 can also be buried inside the substrate 2. The base material 2 can be appropriately selected in accordance with the intended use of the radio shield 1 . In addition, the radio wave shield 1 according to the first embodiment can be configured to have radio wave shielding characteristics such as an existing object (such as a window, a wall, a ceiling, a floor, a partition, a table, etc.) in the room. Therefore, as the material of the substrate 2, for example, resin, glass, paper, rubber, gypsum, ceramic tile, wood, or the like is preferable. Further, it is preferable that the base material 2 has a planar shape such as a plate shape, a sheet shape, or a film shape. The substrate 2 is more preferably not only a function as a substrate but also various properties (transparency, nonflammability, flame retardancy, non-li, flexibility, impact resistance, heat resistance, etc.) ) function. For example, when the radio shield 1 is made to have light transmissivity, it is necessary to form the substrate 2 with a transparent (light transmissive) material. Therefore, as the material of the base material 2, a transparent glass (for example, soda lime, quartz, or the like which can be used, and in which the soda lime is preferable on the cost side) or a transparent polymer can be given. Among these, it is formed as a substrate 2 from the point that it can be formed extremely thin and is flexible and can be curled (can be wound into a cylindrical shape).

The material of 200902809 is preferably a transparent polymer (hereinafter, a film formed of a transparent polymer is referred to as a "transparent polymer film"). Specific examples of the transparent polymer film include, for example, polyethylene terephthalate, polyether oxime, polystyrene, polyethylene phthalate, polyarylate, and polyarylate. Polyether etherketone, polyacetate, polyethylene, polypropylene, nylon 6, etc., cellulose series resin such as polyamine, polyamidiamine, cellulose triacetate, polyamine [ethyl formate] Polyurethane) 'Fluorine series resin such as polytetrafluoroethylene, vinyl compound such as polystyrene, addition polymer (addition polymer) of polyacrylic acid, polyacrylic acid, polyacrylonitrile or ethylene compound, polyfluorenyl A vinylidene compound such as polymethacrylic acid, polyacrylic acid, or a polyethylene submersible, a vinylidene fluoride/trichloroethylene copolymer, or an ethylene/vinyl acetate copolymer A copolymer of a base compound or a fluorine-based compound, a polyether (polyethylene oxide or the like), an epoxy resin, a polyvinyl alcohol, a polyvinyl butyral, or the like. The thickness of the transparent polymer film used as the radio shield 1 is usually 1 0 /z m or more and 5 0 0 /z m or less. The thickness of the ideal transparent polymer film is 30 μm or more and 150/zm or less. More preferably, the thickness of the transparent polymer gel/roll is 50#m or more and 120ym or less. If the transparent polymer film is thinner than 10 /zm, the frequency selective radio wave reflection film 3 tends to be formed, and if it is thicker than 500 // m, the curlability is lowered and it is difficult to curl (it is difficult to form a roll). Cylindrical). Further, if the transparent polymer film is thicker than 50,000 #m, the light transmittance tends to decrease. Further, the radio wave shield 1 manufactured by forming the frequency selective radio wave inverse 13 200902809 on the surface of the substrate 2 is attached to an existing object (such as a window, a wall, a ceiling, a floor, a partition, a table, etc.). It is also possible to apply an adhesive or an adhesive to at least one surface of the side on which the frequency selective radio wave reflection film 3 is formed and the opposite surface thereof, and provide a protective layer on the surface of the adhesive or the adhesive to be crimped (rolled into a roll) Toilet paper), and can be cut according to the required length. Fig. 4 to Fig. 7 show an example of the product pattern (state of use) of the radio wave Λ' Λ shielding body 1 according to the first embodiment. Fig. 4 is a cross-sectional view showing the substrate 2 side of the radio shield 1 adhered to the glass (window glass) 7. In Fig. 4, the radio shield 1 is adhered to the glass 7 via an adhesive 8 provided on the side of the substrate 2 of the radio shield 1. Fig. 5 is a schematic view showing a radio wave shield 1 in which an adhesive 8 and a protective film 9 are formed on the side of the base material 2 of the radio shield 1, and is crimped into a roll toilet paper. The radio shield 1 shown in Fig. 5 can be cut according to the required length, and the protective film 9 is peeled off, and then adhered to glass or the like for use. (Fig. 6 is a cross-sectional view of the frequency selective radio wave reflection film 3 of the radio shield 1 attached to the glass (window glass) 7. In Fig. 6, the radio shield 1 is passed through the frequency of the radio shield 1. The selective electromagnetic wave reflection film 3 - the adhesive 8 provided on the side is adhered to the glass 7. Fig. 7 is a schematic view of the radio shield 1, on the side of the frequency selective radio wave reflection film 3 of the radio shield 1 The adhesive 8 and the protective film 9 are crimped into a roll-shaped toilet paper. The radio shield 1 shown in Fig. 7 can be cut according to the required length, and after peeling off the 14 200902809 protective film 9 The frequency-selective radio wave reflection film 3 formed on the substrate 2 is composed of a plurality of antennas 4 arranged in a predetermined pattern to form a pattern. The first embodiment relates to the first embodiment. In the radio wave shield 1, the frequency selective radio wave reflection film 3 is configured only by the plurality of antennas 4 patterned in the same shape, but the present invention is not limited by the structure. Frequency selective electricity The wave reflection film 3 may have a part (including a pattern different from the shape of the antenna 4 (pa 11 er η). The antenna 4 has frequency selectivity. In other words, the antenna 4 selectively reflects a wave of a specific frequency. Therefore, the radio shield 1 can selectively shield radio waves of a specific frequency and transmit radio waves other than the radio waves. In the first embodiment, as shown in Fig. 3, the antenna 4 is made of a metal film having an opening (preferably Therefore, the antenna 4 has a certain degree of light transmittance and is difficult to stay in the line of sight. Therefore, the radio wave shield 1 according to the first embodiment is difficult to obey the line of sight. From the viewpoint of line of sight goodness, the metal film The area ratio of the antenna 4 is preferably 2.5% or more and 30% or less. Further, when the metal film constituting the antenna 4 is in the form of a planar view, the line width (W) and the interval size (Ρ) are due to The relationship between the conductivity (wave shielding property) and the aperture ratio (transparency) is preferably such that the line width (W) is 5 // m or more and 70/zm or less. More preferably, 8/zm or more and 30//m. The following interval size (P) is preferably 50/zm 400 / zm less. Preferably '100 / zm than 3 0 0 // m or less. Once the width (W) less than 5 g m, the conductive (radio wave shielding properties) will be 15

200902809 tends to decrease. On the other hand, once the line width (W) exceeds 70/rate (transparency), the tendency tends to decrease. Also, once the spacing dimension (P) is less than 50 // m, the property will tend to decrease. On the other hand, once the interval size /z m , the conductivity (wave shielding property) tends to decrease. In addition to the viewpoint of suppressing human sensation by the arrangement of the antenna 4 (transparency viewpoint) and conductivity (in addition to the radio wave point, the radio wave shield 1 is easy to manufacture and the interval size (P) is simultaneously increased. More preferably, it is more preferably 50/zm or more and 70/zm or less, and more preferably, the spacer/zm or more is 400#m or less. Further, the radio wave according to the first embodiment constitutes the metal of the antenna 4. The film is formed in a square grid shape, and is not limited by this structure. The gold constituting the antenna 4 may be a plane formed into a square lattice shape (triangular lattice shape, Collins square shape, etc.). A metal film in the form of a mesh. A plurality of planes are formed. A circular metal (or a metal film having a plane-like elliptical shape or a flat microporous shape, and may also be a metal formed into a planar dot shape such as a circular shape or a polygonal shape). The plurality of antennas 4 are arranged at equal intervals on the substrate 2 in a predetermined arrangement. The plurality of antennas 4, the antennas 4 that are drained I, are not in contact with each other. As shown in FIG. 3, in the plural days, _ from the respective antenna centers C at an angle of 1 2 0 °, the three first element portions 5 having substantially the same degree of release, and at the first / m, the opening aperture ratio (Light transmission (P) exceeds 400 'feeling unobstructed) view, making the line width (W) so that the line width (W) inch (P) is 300. In the shield 1 but, the hair-based film For example, the hexagonal square may also be a view polygon (as a typical matrix (the matrix 丨 is such that the adjacent L 4 has a 1" shape extension and the long element portion 5 of the 16 200902809 outer end is combined The element portion 6. The length (L1) of the first element portion 5 and the length (L2) of the second element portion 6 may be different from each other, or may be the same. The first element portion 5 and the second element portion 6 are vertical. Preferably, the length L 1 of the first element portion 5 and the length L2 of the second element portion 6 satisfy the relational expression of 0 < L2 < 2 (3) I / 2 / Ll. L2 is 2 (3 ) l / In the case of 2/L1 or more, the adjacent second element portions 6 are in contact with each other, and it is impossible to obtain a desired radio wave shielding effect (specifically, an effect of selectively shielding radio waves of a specific frequency). From the viewpoint of achieving a high shielding ratio of a specific frequency, it is preferable that the length L 2 of the second element portion 6 is 0.5 times or more and twice or less the length L1 of the first element portion 5, and more preferably 0.75 times or more and 2 times or less. .

The second element portion 6 may be coupled to the outer end of the first element portion 5 at the center thereof. The second element portion 6 and the first element portion 5 may be formed at a right angle (90 degrees). Further, the width of the first element portion 5 and the width of the second element portion 6 may be different from each other, or may be the same. In the first embodiment, the width of the first element portion 5 and the width of the second element portion 6 are substantially the same width (L3). Preferably, the difference in width between the first element portion 5 and the second element portion 6 is 5% or less of the width of the first element portion 5. Specifically, it is preferable that the width L3 is 0.3 mm or more and 2 mm or less. Further, as will be described in detail later, the narrower the width L 3 , the more the frequency selectivity of the antenna 4 can be improved. If the width L3 is larger than 2 mm, the frequency selectivity tends to decrease. On the other hand, if the width L 3 is less than 0.3 m m, it tends to be difficult to manufacture. 17 200902809 As described above, the element portion 6 is provided at the outer end 2 of the first element portion 5. Therefore, the antenna 4 has a high frequency selectivity higher than the "Y" shape I composed of the three first element portions 5 without the second element antenna. Therefore, the multi-antenna body 1 is provided to shield radio waves of a specific frequency with high selectivity. From the viewpoint of high frequency selectivity, it is preferable that the lengths of the first element and the second element portion 6 are different from each other. For example, the length of the portion 6 is shorter than the length of the first element portion 5. Further, since the antenna 4 has the second element portion 6, the portions 6 are easily arranged opposite each other (more preferably, closely opposed). By arranging the plurality of antennas 4 with the second element portions 6 facing each other (betterly facing each other), the shielding ratio for a specific frequency can be improved. When the second element portions 6 are opposed to each other, from the viewpoint of arranging a larger number of antennas 4, it is preferable that the second element center is coupled to the outer end of the first element portion 5, and the second first element portion 5 is configured. Right angle. The length of the first element portion 5 is related to the frequency (specific frequency) of the radio wave to be reflected by the second element portion 6. Therefore, the length of the portion 5 and the length of the second element portion 6 can be appropriately determined as desired. Specifically, the specific frequency can be lowered by increasing the length of the first element portion element portion 6. By the length of the constricted portion 5 and/or the second element portion 6, a specific frequency library such as a "Y"-shaped linear antenna (having an antenna including only the first element portion 5) can be used only by The combined gas antenna (only the linear wave of the portion 6 is shielded and the second element is made such that the second element number antenna 4 is a radio wave that makes the compact electric wave in each unit surface portion 6 from the length of the realization portion 5 The element portion 6 and the length and the antenna, the specific frequency 5 of the first element and/or the second short first element = rise. 2 The element portion 6 is adjusted by the first 18

200902809 The length of the component part 5 is a specific frequency. On the other hand, in the radio shield 1 according to the first embodiment, as described above, the specific frequency can be adjusted by adjusting the length L 1 of the first element portion 5, and the length of the second element portion 6 can be adjusted. The specific frequency is adjusted by the ratio of L2 to the length L1 of the first element portion 5. Therefore, the radio shield 1 has a wide design width. The antenna 4 is formed of a conductive metal film. The metal film can be formed, for example, of aluminum (A1), silver (Ag), copper (Cu), gold (Au), platinum (Pt), iron (Fe), non-ferrous steel, these mixtures (alloys, etc.). Among them, it is preferable to form a mixture (alloy or the like) of aluminum (A1), silver (Ag), or copper (Cu) having high conductivity. The radio wave reflectance of the antenna 4 for a specific frequency wave is related to the electric conductivity of the antenna 4. Specifically, the higher the conductivity of the antenna 4 (the resistance of the antenna 4 is small), the higher the radio wave reflectance of the antenna 4 for a specific frequency wave. Therefore, by increasing the conductivity of the antenna 4, the radio wave reflectance of the antenna 4 to a specific frequency wave can be improved. Furthermore, the method of forming the antenna 4 is not particularly limited. The antenna 4 can be applied, for example, by an etching method, a sputtering method, a vapor deposition method, a chemical vapor deposition method (CVD method), a screen printing method, a pattern pressure bonding method, a mist coating method, or a mosaic method. form. As described above, the radio wave shield 1 according to the first embodiment is described in detail. However, the shape and size of the radio shield 1 are not limited in any way. The radio wave shield 1 may be a small one having a length of several millimeters, or may be a large one of several meters or more. The radio wave shield 1 can also be formed into a triangle, a quadrangle (rectangular, square), and a multi-angle 19

200902809 Any shape, such as shape, circle, or ellipse. In addition, the antenna 4 included in the radio wave shield 1 per unit area is not limited in its entirety, and can be appropriately changed depending on the use or the like. Increasing the number of antennas 4 per unit area of the radio wave shield 1 is high in achieving high radio wave shielding. (Second Embodiment) Fig. 8 is a plan view showing a radio wave shield of the second embodiment. Fig. 9 is a view showing the configuration of an antenna group 10 of the second embodiment. The radio wave shield of the second embodiment has the same configuration as that of the radio wave shield 1 according to the above-described first embodiment, except for the arrangement of the antenna 4 of the radio wave reflection film 3. Here, the arrangement of the antenna 4 of the second embodiment will be described in detail. In the second embodiment, constituent elements having substantially the same functions will be described with reference to the same reference numerals, and the description thereof will be omitted. As shown in Fig. 8, in the second embodiment, the antenna group 10 is constructed by a pair of antennas 4 provided by the plurality of antennas 4 and the second element portions 6 arranged to face each other. Further, the antenna group 10 constitutes a hexagonal complex assembly 1 1 based on three sets of antenna groups 10 in which the second element portions 6 are arranged in a ring shape. In other words, each of the antenna assemblies 1 1 is configured by six antennas 4 in which the second portions 6 are arranged in a ring shape with each other. In the second embodiment, the antenna assembly 1 is arranged in a predetermined arrangement (typically in a matrix arrangement), and 12 of the first element portions 6 constituting the antenna assembly 1 1 are provided. In order to substantially flatten each other, the plane can be selected to describe the state 1 according to the complex antenna elements. 2 yuan phase 20

200902809 Right. As described above, by configuring the plurality of second element portions 6 to face each other, the radio wave reflectance (shield ratio) of the antenna 4 with respect to a specific frequency radio wave can be improved. Therefore, it is possible to achieve a high electric wave rate for a specific frequency radio wave. Further, the shorter the distance X (reference numeral 9) between the opposing second element portions 6, the higher the radio wave reflectance of the antenna 4. From the viewpoint of improving the reflectance of the antenna 4, it is preferable that X (see Fig. 1 1) between the opposing second element portions 6 is 0 m 4 m or more and 3 m m or less. More preferably, the range is 0.6 m m or more and 1 m m or less. Once the distance X is made shorter than 0.4 m, the second element portions 6 may have unwanted contact with each other. The other; once the distance X is longer than 3 mm, the radio shielding rate will tend to decrease. (Embodiment 3) FIG. 10 is a plan view of a radio wave shield of the third embodiment. The radio wave shield according to the third embodiment has the above configuration in addition to the arrangement of the antenna 4 of the selective radio wave reflection film 3. The two types of radio wave shields involved are the same. Here, the arrangement of the antenna 4 according to the third aspect will be described in detail. In the description of the third embodiment, the same components as those in the second embodiment are used, and constituent elements having substantially the same functions are used, and the description thereof is omitted. In the radio-shielding body according to the second embodiment, as shown in the figure, the plurality of antenna assemblies are separated from each other by a predetermined arrangement, and the radio shield according to the third embodiment is as shown in the figure. The antenna assembly body is further arranged such that the second portions 6 face each other to form a honeycomb (h ο neyc 〇 mb) pattern. According to this, the radio wave shielding photo-ray distance is the relative r-plane, and the implementation number is 8 . Fig. 10 Element One junction 21 200902809 The frequency selectivity can be improved by further increasing the ratio of the second element portions 6 arranged opposite each other.

As described above, in the first to third embodiments, the radio wave shield for selectively shielding a specific frequency radio wave has been described. However, the present invention is not limited to this configuration. For example, the frequency selective radio wave reflection film 3 may be configured to selectively shield radio waves of a plurality of frequencies by a plurality of antennas 4 having mutually different reflected radio wave frequencies. In the fourth embodiment, as an example, a radio wave shield which selectively shields radio waves of two types of frequencies will be described in detail as an example. (Fourth Embodiment) Fig. 1 is a plan view showing a radio wave shield according to a fourth embodiment. Fig. 1 is a graph showing the correlation between the frequency of the radio wave shield and the radio wave shielding characteristic (the amount of transmission attenuation of radio waves) according to the fourth embodiment. The radio wave shield according to the fourth embodiment has the above-described first embodiment, except that the frequency selective radio wave reflection film 3 is composed of the first antenna 4 a and the second antenna 4 b and two types of antennas. The radio wave shield 1 has the same form. Here, the configuration of the frequency selective radio wave reflection film 3 according to the fourth embodiment will be described in detail. In the description of the fourth embodiment, constituent elements having substantially the same functions will be described with reference to the same reference numerals as those of the first embodiment, and the description thereof will be omitted. In the fourth embodiment, the frequency selective radio wave reflection film 3 is composed of two kinds of antennas of the first antenna 4a and the second antenna 4b having similar shapes and different sizes. The first antenna 4a and the second antenna 4b' are respectively on the substrate 2, 22 200902809, and the P 1 and the no-electricity are used to make the wave a and the two are arranged at equal intervals (typically arranged in a matrix). ) are arranged to interfere with each other. The first antenna 4a. and the second antenna 4b each have frequency selectivity. Specifically, the first antenna 4a reflects the first frequency (Fig. 12P1), and the second line 4b reflects the second frequency (Fig. 12P2). Therefore, in the radio wave shield of the fourth embodiment, it is possible to selectively shield the radio wave of the first frequency and the radio wave P 2 of the second frequency, and to transmit radio waves of other frequencies. For example, in the wireless LAN, two kinds of frequency waves of a radio wave of 2.4 GHz frequency and a radio wave of 5.2 GHz frequency are used. In the environment where two types of radio waves are used in an environment using a line LAN, the following wave shields are necessary, that is, selectively shielding the two types of radio waves to be used, so as not to be shielded A radio wave screen such as a radio wave of other frequencies (such as radio waves used in mobile communication, radio waves for television viewing, etc.) is transmitted. As described above, the radio wave shield according to the fourth embodiment selectively shields radio waves of the specific two types of frequencies (the first frequency and the second frequency), and the radio waves of other frequencies are transmitted. Therefore, the electric shield according to the fourth embodiment can be suitably used in an environment in which a wireless LAN is used. Further, in the fourth embodiment, it is preferable that the radio wave reflection spectrum peak of the first antenna 4 is independent of the radio wave reflection spectrum peak of the second antenna 4b. Further, the first antenna 4a and the antenna 4b according to the fourth embodiment have a shape similar to that of the antenna 4 of the first embodiment. Here, the details of the first antenna 4a and the second antenna 4b will be omitted. twenty three

Further, in the fourth embodiment, the frequency selective radio wave reflection film 3 is composed only of the first antenna 4a and the second antenna 4b. However, the present invention is not limited by this configuration, for example, frequency selective radio waves. A part of the reflective film 3 may include a pattern different from the first antenna 4a and the second antenna 4b. (Fifth Embodiment) Fig. 1 is a plan view showing a radio wave shield according to a fifth embodiment. The radio wave shield of the fifth embodiment has the same configuration as that of the radio wave shield of the fourth embodiment except for the arrangement of the first antenna 4a and the second antenna 4b. Here, the arrangement of the first antenna 4a and the second antenna 4b according to the fifth embodiment will be described in detail. In the description of the fifth embodiment, components having substantially the same functions will be described with reference to the same reference numerals as in the fourth embodiment, and the description thereof will be omitted. In the fifth embodiment, as shown in FIG. 13, a plurality of first antennas 4a constitute a plurality of first antenna groups based on a pair of first antennas 4a disposed to face each other with the second element portions 6a. 1 〇a. Further, in the first antenna group 10a, the three sets of first antenna groups 10a arranged in a ring shape in which the second element portions 6a face each other constitute a plurality of hexagonal first antenna assemblies 11a. In other words, each of the first antenna assemblies 11a is constituted by six first antennas 4a that are arranged in a ring shape with the second element portions 6a facing each other. The plurality of first antenna assemblies 1 1 a are further arranged such that the second element portions 6 a face each other to form a honeycomb pattern. On the other hand, the plurality of second antennas 4b, which are disposed opposite to each other by the second element portions 6b24 200902809, constitute a complex number 1 Ob. Further, the second antenna group 1 Ob constitutes a plurality of second antenna assemblies 1 1 b in accordance with the three sets of second antenna groups 10 b arranged in a ring shape in which the second element rows are opposed to each other. In other words, each of the 21st 1b is formed by arranging the antennas 4b in a ring shape by facing the second element portions 6b. Each of the second antenna assemblies 1 1 b is disposed inside the aggregate 1 1 a. In other words, each of the second antenna sets f) is surrounded by the antenna assembly 11a. In the fifth embodiment, the substantially plurality of first antennas 4 e antennas 4b are disposed so that substantially all of the a-th pairs are substantially parallel to each other, and 12 of the 18 strips 6b constituting the second antenna assembly 1 1 b are the second and second. The element portions 6b are disposed to face each other. In this way, the radio wave reflectance (wave shielding ratio) of the first antenna 4a and the second antenna 4b can be raised by the second element portions 6a and 6b. Specifically, it is preferable that the distance between the opposing second element portions C / is 0.4 m or more and 3 m m or less. More ideal range. Above 1 m m. When the opposing second element portion 6a is made shorter than 0.4 m, the opposing second element portion 6a (6b) will have a desired contact. On the other hand, when the distance between the opposing second subjects is larger than 3 mm, the radio shielding ratio tends to decrease. In the fifth embodiment, the first antenna set 2 antenna assembly 11 b is arranged to have their respective axes of symmetry. In order to make the first antenna assembly 11a surround the second antenna group 夂 6b, the six second antennas in the hexagonal complex antenna assembly are second to the first antenna body 1 1 b by the second element portion 6 i . The second and second element parts are substantially parallel to each other and are added to a specific frequency; 6 a (6 b) is 0.6 m m (6 b). The distance may be different: part 6 a (6b) is low. Body 11 a and the first slope. Antenna assembly 25

200902809 1 1b, the size of the second antenna 4b constituting the second antenna assembly 1 1 b must be smaller than the size of the first antenna 4 a constituting the first antenna assembly 11a. For example, when the symmetry axes of the first antenna assembly 1 1 a and the second antenna assembly 1 1 b are arranged in parallel, the second antenna 4 b must be made very small for the first antenna 4 a so that the first The antenna 4a and the second antenna 4b do not interfere with each other. Therefore, in this configuration, the degree of freedom in design of the first antenna 4a and the second antenna 4b is low. On the other hand, as shown in the fifth embodiment, when the symmetry axes of the first antenna assembly 1 1 a and the second antenna assembly 1 1 b are arranged to be inclined (for example, β = 10 °), they are opposed to each other. The relative positions of the second element portions 6b and the second element portions 6b facing each other are deviated from each other. Therefore, the symmetry axes of the first antenna assembly 1 1 a and the second antenna assembly 1 1 b are arranged obliquely to each other, and the first antenna assembly 11 a and the second antenna assembly 1 1 b are respectively arranged. When the symmetry axes are arranged in parallel, the relative size of the second antenna 4b to the first antenna 4a can be increased. In other words, the degree of freedom in design of the first antenna 4a and the second antenna 4b. Specifically, it is possible to shield two kinds of radio waves whose frequencies are close to each other (e.g., the ratio of the first frequency to the second frequency (the first frequency < the second frequency) is 0.4 5 or more). Therefore, it is possible to freely select the frequencies of the two types of radio waves that can be shielded by the frequency selective radio wave reflection film 3. Further, in FIG. 13, the substantially hexagonal first antenna assembly 1 1 a and the second antenna assembly 1 1 b are arranged most closely, but they are not closely arranged according to the required radio shielding rate. Configure and adjust the number of 26 200902809 roughly hexagonal antenna assemblies 11 a and 11 b respectively. (Embodiment 6) FIG. 14 is a plan view of a radio wave shield according to Embodiment 6.

The radio wave shield according to the sixth embodiment is the same as the first embodiment except that the frequency selective radio wave reflection film 3 is composed of the first antenna 4 c, the second antenna 4 d, and the third antenna 4e. The radio wave shield 1 involved has the same form. Here, the configuration of the frequency selective radio wave reflection film 3 of the sixth embodiment will be described in detail. In the description of the sixth embodiment, constituent elements having substantially the same function will be described with reference to the same reference numerals as in the first embodiment, and the description thereof will be omitted. In the sixth embodiment, the frequency selective radio wave reflection film 3 includes the first antenna 4 c, the second antenna 4 d, and the third antenna 4 e having different sizes (hereinafter, in the sixth embodiment, the "first" The 1 antenna 4 c, the second antenna 4 d, and the third antenna 4 e ′′ are collectively referred to as “antenna 4 ”). The first antenna 4 c, the second antenna 4d, and the third antenna 4e are so-called Y-T antennas having similar shapes. Among the first antenna 4c, the second antenna 4d, and the third antenna 4e, the second antenna 4d is the largest, and the first antenna 4c is the smallest. In the sixth embodiment, the first antenna 4c, the second antenna 4d, and the third antenna 4e have radio wave reflection (shield) spectral peaks which are not independent (continuous) from each other. Therefore, the frequency selective radio wave reflection film 3 composed of the three types of antennas of the first antenna 4c, the second antenna 4d, and the third antenna 4e can selectively shield the frequency of the radio wave reflected by the first antenna 4c, The frequency of the radio wave reflected by the second antenna 4 d and the frequency of the radio wave reflected by the third antenna 4 e, 27

200902809 Radio waves with a wide frequency band (such as 815MHz and 925MHz domain). In other words, in the sixth embodiment, the radio wave shield according to the sixth embodiment can selectively shield the electric wave shield having a certain width. The radio shield according to the fifth embodiment has a shielding characteristic (transmission attenuation characteristic of radio waves) as shown in FIG. . Fig. 15 is a view showing an example of correlation between radio wave shielding amount (transmission attenuation amount of radio waves) and frequency according to the sixth embodiment. As shown in Fig. 15, the spectral peak P 5 of the radio shield® antenna 4 c of the sixth embodiment and the spectral peak P 4 of the spectrally sharp antenna 4 e of the second antenna 4 d are connected to each other independently. The ratio of the depth Η 2 of the change portion to the baseline BL to the maximum peak P 3 from the baseline Η 1 is 50% or more (preferably, the difference between Η 1 and Η 2 is therefore, according to the radio wave screen 敝 Ρ according to the sixth embodiment) The electric wave in the entire frequency band between 5 is shielded from 1 〇d Β or more, and a high 1 OdB exceeding 1 〇% is achieved. If the frequency f fmax of 10 0 B or more is shielded, The minimum of the radio frequency that is shielded by 10 dB or more is represented by 2 (Fmax - Fmin) / (Fmax + Fmin), and the arrangement of the antennas 4 c, 4 d, and 4 e is explained in detail. In the frequency selective radio wave reflection, a plurality of first antennas 4c, a plurality of second antennas 4d, and antennas 4e are arranged so as to be arranged alternately in one direction in the order of the first antenna 4c and the second antenna 4d. The following band radio wave shielding body wave is formed. For example, in the radio wave body of the radio wave device, the first peak Ρ3 and the third sentence say that the depth of the valley BL is 3 d Β or less). Body, spike P3 high shielding ratio is affected by the frequency band. The maximum value is the value F m i η, the specific frequency band. Referring to FIG. 1 4 I 3, second element and complex third 3rd antenna 4e complex antenna array 28

200902809 12. In other words, in the frequency selective radio wave reflection film 3, the plurality of antenna arrays 1 2 are arranged in one direction in the order of the first day 4 c, the second antenna 4 d, and the third antenna 4 e so as to be parallel to each other. Configured in stripes. In the frequency selective radio wave reflection film 3, each of the first antennas 4c is adjacent to the second day 4d and the third antenna 4e of the side wall antenna array 1 of the antenna array 12 to which the first antenna 4c belongs. Similarly, each of the second antennas 4d is adjacent to the first antenna and the third antenna 4e of the barrier antenna array 12 of the antenna array 12 to which the first antenna 4d belongs. Each of the third antennas 4e is adjacent to the second antenna 4d and the first antenna 4 of the barrier antenna array 12 of the antenna array 12 to which the third antenna 4e belongs. In other words, the first antenna 4c is disposed and located on the first day. The antenna center of the first antenna 4c adjacent to the first antenna to which the antenna column 1 2 on both sides of the antenna column 1 to which the antenna column 1 belongs is formed in a triangular configuration (preferably a triangle). Further, the second antenna 4d is disposed so that the antenna center of the second antenna 4d adjacent to the second antenna to which the antenna array 12 located on both sides of the antenna row 1 to which the second antenna 4b belongs is formed into a triangle ( It is best to be a trigonometric shape). Further, the third antenna 4 e is disposed so as to form a triangle with respect to the antenna center of the three antennas 4 e adjacent to the third antenna 4 e to which the antenna array 1 2 located on both sides of the antenna array 12 of the third antenna 4 e belongs (preferably an equilateral triangle) With such an antenna arrangement, for example, the two element portions 6 of the first antenna 4c enter between the second antenna 4d and the third line 4e of the partition antenna row 12, and the plural number can be In other words, the antenna array 1 2 is closely arranged in the row direction. In other words, as shown in FIG. 14 , the antenna element 4 can be closely arranged in a state in which the second element portion 6 of the adjacent antenna 4 in the region where the second antenna 4 d is disposed is cut. Therefore, it will be possible to closely arrange more line rows per unit area. This line is 2 c c c ° line 4 c positive line 4d angle belongs to the first day 〇 day 〇 phase set day 29

200902809 Lines 4c, 4b, 4c. In this case, the radio shielding rate and the antenna 4 per unit area are turned off. When the number of antennas 4 per unit area is increased, the radio shielding rate is also high, and the radio shielding rate is high according to the arrangement of the antenna 4 according to the sixth embodiment. . In addition, since the second antenna 4d and the third antenna 4e on the first day can be made the same as the unit area, the radio wave shielding in the frequency band can be suppressed from being uneven. From the viewpoint of increasing the number of antennas 4 per unit area, it is preferable that the first portion 6 is shorter than the first element portion 5 (L 2 > L 1). Further, in the arrangement of the antennas 4 of the sixth embodiment, the second element portions 6 of the wires 4 are arranged in parallel with each other without being opposed to each other. The frequency selectivity of the antenna 4 can be kept low. In other words, the specific frequency band of the antenna 4 is kept relatively wide. Therefore, it is possible to set a good radio shielding rate with a small amount of radio wave in the entire frequency band. (Embodiment 7) As described above, in the first to sixth embodiments, the radio wave shielding of the frequency selective radio wave reflection film 3 having the antenna configuration has been described. The present invention is not limited to this configuration. For example, the frequency radio wave reflection film 3 may be a shape including a shape other than the Y-T type antenna, or may be an antenna including a plurality of shapes. In the eighth embodiment, the example in which the selective radio wave reflection film 3 is configured by the "Y"-shaped antenna and the frequency-selective radio wave reflection film 3 of the so-called cross type will be described as an example. Fig. 16 shows an increase in the number of the radio wave shields according to the seventh embodiment, and it is possible to realize the line 4c and the number of the plurality of elements, and the two elements are plural days. Therefore, the Y-T body can be realized, but the selective line can be realized. And implement the plane of the frequency antenna structure 30 200902809. As shown in Fig. 16, the frequency selective radio wave reflection film 3 may be a so-called "Y" shape composed of three element portions extending radially from each other at an angle of 120 degrees from the center of the antenna and having substantially the same length. Antenna 4 f. Also in this configuration, it is possible to realize a radio wave shield which is inherent to the antenna 4f and selectively shields radio waves of a specific frequency. (Embodiment 8) FIG. 1 is a plan view of a radio wave shield according to Embodiment 8. The frequency selective radio wave reflection film 3 shown in Fig. 17 may be a so-called cross type antenna 4g composed of four element portions extending radially from each other at an angle of 90° from the center of the antenna and having substantially the same length. Composition. Also in this configuration, it is possible to realize a radio wave shield that is selectively shielded from radio waves of a specific frequency inherent to the antenna 4 g. [Simple description of the map]

Fig. 1 is a cross-sectional view showing a radio wave shield 1 according to a first embodiment of the present invention. Fig. 2 is a plan view showing the radio shield 1 according to the first embodiment. FIG. 3 is a plan view showing the shape of the antenna 4. Fig. 4 is a cross-sectional view showing the glass (window glass) 7 adhered to the substrate 2 side of the radio shield 1. Fig. 5 is a schematic view showing the radio wave shield 1 in which the adhesive 8 and the protective film 9 are formed on the side of the base material 2 of the radio shield 1 and wound into a roll toilet paper. 31 200902809 Fig. 6 is a cross-sectional view showing the side of the frequency selective radio wave reflection film 3 to which the radio shield 1 is adhered to the glass (window glass) 7. Fig. 7 is a schematic view showing a state in which the adhesive 8 is formed on the side of the frequency selective radio wave reflection film 3 of the radio wave shield 1 and the protective film 9 is wound into a roll paper tissue. Fig. 8 is a plan view showing a radio wave shield according to a second embodiment. Fig. 9 is a plan view showing the structure of an antenna group 10 of the second embodiment. Fig. 10 is a plan view showing a radio wave shield according to a third embodiment. Fig. 1 is a plan view showing a radio wave shield according to a fourth embodiment. Fig. 1 is a correlation diagram of the frequency and radio wave shielding characteristics (radiation of radio wave transmission attenuation) of the radio shield according to the fourth embodiment. Fig. 13 is a plan view showing a radio wave shield according to a fifth embodiment. Fig. 14 is a plan view showing a radio wave shield according to a sixth embodiment. Fig. 15 is a view showing an example of correlation between radio wave shielding amount (radiation attenuation of radio waves) and frequency of the radio shield according to the sixth embodiment. Fig. 16 is a plan view showing a radio wave shield according to a seventh embodiment. Fig. 1 is a plan view showing a radio wave shield according to an eighth embodiment. [Description of main component symbols] 1 Radio shield 2 Substrate 3 Frequency selective radio wave reflection film 4 Antenna 5 First element part 32 200902809 6 Second element part 7 Glass 8 Adhesive 9 Protective film 10 Antenna group 11 Antenna assembly 12 Antenna column

33

Claims (1)

200902809 X. Patent Application Range: 1 A radio wave shield is configured such that a plurality of antennas respectively reflecting electric waves of a specific frequency band are formed by a metal film having an opening. 2. The radio wave shield according to the first aspect of the invention, wherein the metal film is made of a metal selected from the group consisting of silver, copper, and aluminum, or is composed of silver, copper, and Made of an alloy of at least 1 f 1 metal selected in the group. The radio wave shield according to the first aspect of the invention, wherein the ratio of the area of the metal film in the antenna is 2.5% or more and 30% or less. 4. The radio wave shield according to claim 1, wherein each of the antennas has: a first element portion having three line segments having substantially the same length, each of which is at an angle of 1 2 0 from the center of the antenna. Radially extending; and the second element portion in the form of a line segment is connected to the outer end of each of the first element portions by L·:. The radio wave shield according to claim 4, wherein the plurality of antennas are arranged to form a plurality of antenna groups, wherein the antenna elements are formed by opposing the second element portions of two adjacent antennas . The radio wave shield according to the fourth aspect of the invention, wherein the plurality of antennas are arranged to form a plurality of antenna assemblies, wherein the second antenna portions of the adjacent six antennas are disposed opposite to each other Structure 34 200902809 into a hexagon. The above-mentioned radio wave is the above-mentioned anti-radio frequency. 7. The radio wave shielding body according to the first aspect of the patent application, wherein the plurality of antennas are composed of a plurality of antennas, and the frequency bands of the plurality of antennas are different from each other. 8. The radio wave shield according to claim 1, wherein the plurality of antennas are composed of a plurality of antennas, and the peaks of the radio spectrum of the plurality of antennas are not independent of each other. I 35