FI127500B - Frequency selective structure - Google Patents

Frequency selective structure Download PDF

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Publication number
FI127500B
FI127500B FI20165763A FI20165763A FI127500B FI 127500 B FI127500 B FI 127500B FI 20165763 A FI20165763 A FI 20165763A FI 20165763 A FI20165763 A FI 20165763A FI 127500 B FI127500 B FI 127500B
Authority
FI
Finland
Prior art keywords
frequency
coating layer
openings
selective structure
radio waves
Prior art date
Application number
FI20165763A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20165763A (en
Inventor
Marko Mökkönen
Original Assignee
Lammin Ikkuna Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lammin Ikkuna Oy filed Critical Lammin Ikkuna Oy
Priority to FI20165763A priority Critical patent/FI127500B/en
Publication of FI20165763A publication Critical patent/FI20165763A/en
Application granted granted Critical
Publication of FI127500B publication Critical patent/FI127500B/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/18—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against harmful radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/10183—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer being not continuous, e.g. in edge regions
    • B32B17/10192—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer being not continuous, e.g. in edge regions patterned in the form of columns or grids
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3681—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating being used in glazing, e.g. windows or windscreens
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
    • E06B3/6715—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased thermal insulation or for controlled passage of light
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows

Abstract

A frequency selective structure (1), which comprises a dielectric substrate (2) provided with an electrically conductive coating layer (3), which comprises an opening arrangement (4) for improving propagation of radio waves through the structure (1). The opening arrangement (4) comprises four closed loop-shaped openings (5) arranged one inside the other and closed-loop-shaped regions of coating layer (3) located between said openings (5). Two outer openings (5) of the opening arrangement (4) and the region of coating layer (3) therebetween are dimensioned to improve the propagation of radio waves at a predetermined frequency through the frequency selective structure (1). Two inner openings (5) of the opening arrangement (4) and the region of coating layer (3) therebetween are dimensioned to improve the propagation of radio waves at a second predetermined frequency through the frequency selective structure (1).

Description

FREQUENCY SELECTIVE STRUCTURE
The invention relates to a frequency selective structure such as a glass pane of a glazing.
Insulating Glass Units (IGUs) are typically used in various glazings in windows, 5 doors and facades to save energy in all types of buildings. The IGUs comprise several glass panes which have been assembled and sealed in the factory and are separated by hermetically sealed gas spaces containing air or insulating gas. These kinds of insulating glass units can be double-, triple- or even quadruple --glazed. The surfaces of the glass panes facing the gas space can be provided with a low-e (low-emissivity) coating layers to improve the insulation properties of the glazing. Low-e coatings are relatively invisible coatings which reduce heat transfer and reflect heat back into interior. Low-e coatings are microscopically thin metal layers that are deposited on a glass surface. Depending on the application there are number of different coatings used in IGU’s to achieve desired features.
At the same time as thermal transmittance (U-value) of the glazing is improved by low-e coatings the radio signal capability to propagate through the glazing is affected negatively. Mobile network signal strength outside of the building together with exterior cover attenuations are the most important factors when looking at the mobile phone network coverage in indoors. Before using the low-e coatings on windows the mobile phone network signals had relatively small attenuation values when coming to the interior through the windows, and for the mobile phone network signals have not been necessary to arrange other routes. However, the low-e coatings cause an essential attenuation to radio signals based on two main phenomenon; reflection and absorption. This is due to the fact that low-e coatings are thin but uniform electrically conductive metal layers on the surface of glass pane. The situation for the signals becomes even worse when the window comprises several coated glass panes.
For improving the propagation of radio signals through the glass pane, the low30 e coating can be provided with openings, through which radio signals are able
20165763 prh 07-08- 2017 to propagate. The openings in the coating layer can be dimensioned to improve the propagation of radio signals at a predetermined frequency or frequency range. Typically the openings have a shape of a closed loop so that the interior of the opening is electrically isolated from the exterior of the open5 ing. The coating can also comprise second openings dimensioned to improve the propagation of radio signals also at a second predetermined frequency or frequency range, in which case the openings and the second openings have typically similar shapes but different sizes so that the openings and the second openings can be placed within each other.
The size of the openings in the coating depends on the angle at which the wave front approaches the surface of the glazing. In practice, it is rare that the glazing surface is perpendicularly directed towards dominant signal transmission path in which case the amount of signal energy passing through a certain size of aperture is maximum. Because the wave front typically approaches the surface of the glazing at an oblique horizontal or vertical angle, it is necessary to have a relatively larger opening the smaller is the approaching angle.
The width of the wave front and the signal power could be increased by making the area of the openings in the coating layers larger, but in this case the area of the coating layer becomes smaller which increases the heat losses through the glazing.
Document WO 8401242 A1 discloses a frequency selective structure which comprises a dielectric substrate provided with an electrically conductive coating layer, which comprises an opening arrangement for improving propagation of radio waves through the structure.
The object of the present invention is to provide a frequency selective structure in which the area of the openings in the coating layer can be reduced.
This object is achieved by a glass pane according to claim 1.
The frequency selective structure according to the invention comprises a dielectric substrate provided with an electrically conductive coating layer, which
20165763 prh 07-08- 2017 comprises an opening arrangement for improving propagation of radio waves through the structure. The opening arrangement comprises four closed loopshaped openings arranged one inside the other and closed-loop-shaped regions of coating layer located between said openings. The regions of coating layer are bounded by said openings. Two outer openings of the opening arrangement and the region of coating layer therebetween are dimensioned to improve the propagation of radio waves at a predetermined frequency through the frequency selective structure. Two inner openings of the opening arrangement and the region of coating layer therebetween are dimensioned to improve the propagation of radio waves at a second predetermined frequency through the frequency selective structure.
The frequency selective structure according to the invention has a number of advantages. In conventional solutions the opening in the coating layer has a shape of a closed loop. The opening is dimensioned to improve the propaga15 tion of the radio waves at a desired frequency. The idea of the invention is to replace a conventional closed loop shaped opening in the coating layer with two narrow closed loop shaped openings which are arranged one inside the other. A closed loop shaped region of coating layer is located between the openings.
The differences between the traditional solution and the invention are shown in figs. 1a and 1b. Fig. 1 shows traditional openings 5’ in the coating layer 3 on the surface of a glass. Black rectangles represent areas of the openings 5’ that typically are removed. Fig. 1b shows the solution according to the invention where only boundary lines (openings 5) are removed. As can be seen from figs. 1a and 1b, in the solution according to the invention the total width (w) of two openings 5 and the coating layer 3 therebetween can be equal to the width (w) of the conventional opening 5’. As a result, the total area of the coating layer 3, which must be removed, is significantly smaller than in the conventional solution. When considering a window with low-e-coating layer the smaller is removed area the better is energy efficiency of the window. Also the narrow
20165763 prh 07-08- 2017 openings 5 in the coating layer 3 are much more invisible than conventional wider openings 5’.
The frequency selective structure according to an embodiment of the invention comprises four openings arranged one inside the other. Thus, the structure can be dimensioned to improve the propagation of radio waves at two different frequencies or frequency ranges.
In the following the invention will be described by way of an example with reference to the accompanying drawings, in which:
Figs. 1a show a traditional opening arrangement in the coating layer of a win10 dow and 1 b show the opening arrangement according to the invention,
Fig. 2 is a front view a frequency selective structure according to an embodiment of the invention, and
Fig. 3 shows an opening arrangement of the structure of fig. 2.
Fig. 4 is a side view of the frequency selective structure of fig. 2.
Figs 2-4 show a frequency selective structure 1 according to an embodiment of the invention. In this embodiment the frequency selective structure 1 is a glass pane that is used in glazings, such as windows or doors.
The frequency selective structure 1 comprises a dielectric substrate 2 which is provided with an electrically conductive coating layer 3. In the embodiment shown in figures 2-4 the glass pane 1 comprises a dielectric glass substrate 2 which is provided with an electrically conductive coating layer 3. The electrically conductive coating layer 3 can be so-called low-e (low-emissivity) coating for reducing the amount of ultraviolet and infrared light that can pass through the glass pane 1. Low-e coating layer allows essentially all visible light to pass through the glass pane 1. Typically low-e coating layer is a thin metal or metaloxide film. The thickness of the coating layer 3 is 5-100 nm.
The coating layer 3 can be an on-line coating (hard coating) or an off-line coating (soft coating). On-line coating layer comprises metal oxides and other
20165763 prh 07-08- 2017 compounds. On-line coating is applied directly onto the surface of the glass substrate 2 during the manufacturing process when the glass substrate 2 is extremely hot. Metal oxides and other compounds fuse onto the surface of the glass substrate 2. On-line coatings are thicker and more durable than off-line coatings. Therefore, the on-line coated surface of the glass pane can be used as the outermost surface of the glazing.
Off-line coating comprises multiple thin metal oxide layers (silver, nickel, tin) and other compounds on the surface of the glass substrate 2. Off-line coating is applied onto the surface of glass substrate 2 as a separate step in the manufacturing process of the glass pane 1. The off-line coating is susceptible to wear. Therefore, the off-line coated glass panes are used in insulating glazings such that the off-line coated surface faces the hermetically sealed gas space between two glass panes.
The electrically conductive coating layer 3 comprises an opening arrangement
4 for improving the propagation of radio waves through the frequency selective structure 1. The opening arrangement 4 comprises four closed-loop shaped openings 5 arranged one inside the other. The opening arrangement 4 comprises exactly four openings 5. The openings 5 are arranged concentrically one inside the other. The openings 5 of the opening arrangement 4 have simi20 lar shapes but different sizes. The interior of each opening 5 is electrically isolated from the exterior of said opening 5. The aspect ratios (the ratio of width to height) of the openings 5 of the opening arrangement 4 are equal. The openings 5 extend through the coating layer 3 to the substrate 2 surface which is provided with the coating layer 3. . Typically the entire surface of the dielectric substrate 2 is covered by the conductive coating layer 3, except the areas of the openings 5.
The openings 5 have a shape of a closed loop, typically a square loop, rectangular loop or circle. Closed loop shaped regions of coating layer 3 are located between the openings 5. Each opening 5, which is located inside the outer30 most opening, is surrounded by the closed loop shaped region of coating layer
3. Also the outermost opening 5 of the opening arrangement 4 is completely
20165763 prh 07-08- 2017 surrounded by coating layer 3. The closed loop shaped regions of coating layer 3 are bounded by the openings 5. The interior of the innermost opening 5 comprises coating layer 3.
The width (ws) of the slit forming the opening 5 is at most 2.5 mm. Typically 5 the width (ws) of the slit is 0.01-1 mm. Typically all openings 5 of the opening arrangement 4 have equal ws.
The openings 5 are formed by a laser device such that a focused laser beam is directed to the coating layer 3, which melts, burns or vaporizes away from the surface of the dielectric substrate 2.
The coating layer 3 comprises a plurality of opening arrangements 4, which are arranged periodically in two dimensions. The opening arrangements 4 are similar to that described above. The height (hi) of the outermost opening 5 of the opening arrangement 4 is 30-70 mm. The width (w1) of the outermost opening of the opening arrangement 4 is w1 < 2h1. The distance (x) between the adjacent and/or superimposed opening arrangements 4 is constant. Typically the distance X between adjacent and/or superimposed opening arrangements 4 is between ws < X < hi.
Two outer or outermost openings 5 of the opening arrangement 4 and the region of coating layer 3 therebetween are dimensioned to improve the propaga20 tion of radio waves at a predetermined frequency or frequency band through the frequency selective structure 1. Said two outer or outermost openings 5 are dimensioned to improve the propagation of radio waves at only one frequency or frequency band. Additionally, two inner or innermost openings 5 of the opening arrangement 4 and the region of coating layer 3 therebetween are dimensioned to improve the propagation of radio waves at a second predetermined frequency or frequency band through the frequency selective structure
1. Said two inner or innermost openings 5 are dimensioned to improve the propagation of radio waves at only one frequency or frequency band. Two outer or outermost openings 5 of the opening arrangement 4 and the coating layer
3 therebetween are dimensioned such the coating layer 3 resonates at the
20165763 prh 07-08- 2017 predetermined frequency or frequency band when radio waves at said predetermined frequency or frequency band pass through said openings 5. Thus, the coating layer 3 with openings 5 form a so-called frequency selective surface. The predetermined frequency or frequency band can comprise one or more frequencies or frequency bands used for mobile communication (e.g. 950 MHz, 1800 MHz, 2100 MHz, 800 MHz, 2600 MHz).
Two inner or innermost openings 5 of the opening arrangement 4 and the coating layer 3 therebetween are dimensioned such the coating layer 3 resonates at the second predetermined frequency or frequency band when radio waves at said second predetermined frequency or frequency band pass said openings 5. Also the second predetermined frequency or frequency band can comprise one or more frequencies or frequency bands used for mobile communication (e.g. 950 MHz, 1800 MHz, 2100 MHz, 800 MHz, 2600 MHz).
In the above described embodiment the frequency selective structure 1 is di15 mensioned to improve the propagation of radio waves at two different frequencies or frequency bands. The opening arrangement 4 can comprise more than four closed loop shaped openings 5 which are arranged one inside the other. In this case the opening arrangement 4 can be dimensioned to improve the propagation of radio waves at three or more different frequencies or frequency bands. The opening arrangements 4 can comprise only two closed loop shaped openings 5 which are arranged within each other. In this case the openings 4 and the loop shaped coating layer region therebetween is dimensioned to improve the propagation of radio waves at only one frequency or frequency band.
In addition to glass panes of glazings, the frequency selective structure 1 according to the invention can also be used in other applications, for example in insulating panels, in which one or both sides of the insulating panel are provided with electrically conductive coating layers, for example aluminium layers, which comprise above described opening arrangements 4.

Claims (8)

1. Taajuusselektiivinen rakenne (1), joka käsittää dielektrisen substraatin (2), joka on varustettu sähköä johtavalla pinnoitekerroksella (3), joka käsittää aukkojärjestelyn (4) radioaaltojen etenemisen parantamiseksi rakenteen (1) läpi,A frequency selective structure (1) comprising a dielectric substrate (2) provided with an electrically conductive coating layer (3) comprising an aperture arrangement (4) for improving the propagation of radio waves through the structure (1), 5 tunnettu siitä, että5 characterized in that - aukkojärjestely (4) käsittää neljä sisäkkäin järjestettyä sujetun silmukan muotoista aukkoa (5), ja aukkojen (5) välissä olevia suljetun silmukan muotoisia pinnoitekerrosalueita (3), joita pinnoitekerrosalueita (3) aukot (5) rajaavat,- the aperture arrangement (4) comprises four nested threaded openings (5), and closed-loop coating layer regions (3) between the openings (5), which are delimited by the openings (5) of the coating layer regions (3), - aukkojärjestelyn (4) kaksi ulompaa aukkoa (5) ja niiden välissä oleva pinnoi10 tealue (3) on mitoitettu parantamaan ennaltamäärätyllä taajuudella olevien radioaaltojen etenemistä taajuusselektiivisen rakenteen (1) läpi,- the two outer openings (5) of the aperture arrangement (4) and the coating area (3) therebetween are dimensioned to improve the propagation of radio waves at a predetermined frequency through the frequency selective structure (1), - aukkojärjestelyn (4) kaksi sisempää aukkoa (5) ja niiden välissä oleva pinnoitealue (3) on mitoitettu parantamaan toisella ennaltamäärätyllä taajuudella olevien radioaaltojen etenemistä taajuusselektiivisen rakenteen (1) läpi, ja- the two inner openings (5) of the aperture arrangement (4) and the coating region (3) therebetween are dimensioned to improve the propagation of radio waves at a second predetermined frequency through the frequency selective structure (1), and 15 - taajuusselektiivinen rakenne (1) on lasituksen, kuten ikkunan, lasi.15 - frequency-selective structure (1) is a glass for glazing, such as a window. 2. Patenttivaatimuksen 1 mukainen taajuusselektiivinen rakenne (1), tunnettu siitä, että kunkin aukon sisäpuoli on sähköisesti eristetty mainitun aukon ulkopuolesta.A frequency-selective structure (1) according to claim 1, characterized in that the inside of each opening is electrically insulated from the outside of said opening. 3. Patenttivaatimuksen 1 tai 2 mukainen taajuusselektiivinen rakenne (1), tun20 nettu siitä, että aukkojärjestelyn (4) aukkojen (5) sivusuhteet ovat yhtäsuuria.Frequency selective structure (1) according to claim 1 or 2, characterized in that the apertures (5) of the aperture arrangement (4) have equal aspect ratios. 4. Jonkin edellä olevan patenttivaatimuksen mukainen taajuusselektiivinen rakenne (1), tunnettu siitä, että pinnoitekerros (3) käsittää useita periodisesti kahteen dimensioon järjestettyjä aukkojärjestelyjä (4).Frequency selective structure (1) according to one of the preceding claims, characterized in that the coating layer (3) comprises a plurality of periodically arranged two-dimensional aperture arrangements (4). 5. Patenttivaatimuksen 4 mukainen taajuusselektiivinen rakenne (1), tunnettu 25 siitä, että viereisten ja/tai päällekkäisten aukkojärjestelyiden (4) välinen etäisyys (x) on vakio.A frequency-selective structure (1) according to claim 4, characterized in that the distance (x) between adjacent and / or overlapping opening arrangements (4) is constant. 6. Jonkin edellä olevan patenttivaatimuksen mukainen taajuusselektiivinen rakenne (1), tunnettu siitä, että aukkojärjestelyn (4) kaksi ulompaa aukkoa (5) ja niiden välinen pinnoitekerrosalue (3) on mitoitettu siten, että pinnoitekerros (3) resonoi ennaltamäärätyllä taajuudella, kun mainitulla ennaltamäärätyllä taa5 juudella olevat radioaallot kulkevat mainittujen ulompien aukkojen läpi.Frequency-selective structure (1) according to one of the preceding claims, characterized in that the two outer openings (5) of the aperture arrangement (4) and the coating layer area (3) therebetween are dimensioned such that the coating layer (3) resonates at a predetermined frequency. The radio waves on the hair pass through said outer openings. 7. Jonkin edellä olevan patenttivaatimuksen mukainen taajuusselektiivinen rakenne (1), tunnettu siitä, että aukkojärjestelyn (4) kaksi sisempää aukkoa (5) ja niiden välinen pinnoitekerrosalue (3) on mitoitettu siten, että pinnoitekerros (3) resonoi toisella ennaltamäärätyllä taajuudella, kun mainitulla toisella ennal10 tamäärätyllä taajuudella olevat radioaallot kulkevat mainittujen sisempien aukkojen läpi.Frequency selective structure (1) according to one of the preceding claims, characterized in that the two inner openings (5) of the aperture arrangement (4) and the coating layer region (3) therebetween are dimensioned such that the coating layer (3) resonates at another predetermined frequency. radio waves at a second predetermined frequency pass through said inner openings. 8. Jonkin edellä olevan patenttivaatimuksen mukainen taajuusselektiivinen rakenne (1), tunnettu siitä, että aukkojen muodostavan raon leveys (ws) on enintään 2,5 mm, tyypillisesti 0,01-1 mm.Frequency-selective structure (1) according to one of the preceding claims, characterized in that the gap (w s), which forms the apertures, does not exceed 2.5 mm, typically 0.01 to 1 mm. 15 9. Patenttivaatimuksen 1 mukainen taajuusselektiivinen rakenne (1), tunnettu siitä, että uloimman aukon (5) korkeus (h1) on 30-70 mm.A frequency-selective structure (1) according to claim 1, characterized in that the height (h1) of the outermost opening (5) is 30-70 mm.
FI20165763A 2016-10-11 2016-10-11 Frequency selective structure FI127500B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11511524B2 (en) 2020-03-11 2022-11-29 LabForInvention Energy-efficient window coatings transmissible to wireless communication signals and methods of fabricating thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11511524B2 (en) 2020-03-11 2022-11-29 LabForInvention Energy-efficient window coatings transmissible to wireless communication signals and methods of fabricating thereof

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