• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a glazing unit comprising a window whose face is coated with a conductive layer (29), comprising at a non-zero distance from the conductive layer a periodic pattern of conductive elements (11) adapted to increase, for a frequency determined, the radiofrequency electromagnetic wave transmission, said periodic pattern being selected to have a transmission zero at a frequency between substantially half and substantially twice the frequency to be amplified.
    公开号:FR3037582A1
    申请号:FR1555638
    申请日:2015-06-19
    公开日:2016-12-23
    发明作者:Alejandro Niembro；Guy Eymin-Petot-Tourtollet；Emmanuel Pistono；Pierre Lemaitre-Auger；Tan-Phu Vuong
    申请人:Institut Polytechnique de Grenoble；Universite Joseph Fourier (Grenoble 1)；Centre Technique de lIndustrie des Papiers Cartons et Celluloses；
    IPC主号:
    专利说明:

    [0001] B13947 - B261 METHOD FOR INCREASING THE TRANSMISSION OF RADIO FREQUENCY ELECTROMAGNETIC WAVES THROUGH THERMALLY INSULATING WINDOWS. FIELD The present application relates to the transmission of radiofrequency electromagnetic waves through a glazing, one face of which is coated with a conductive layer, and more particularly a thermally insulating glazing, one face of which is coated with a metal oxide. Description of the Prior Art Filters for shielding a room or a building against certain electromagnetic waves have been made. Such filters may consist of films shielding the carrier frequencies of the wireless telecommunication systems. This type of conductive element periodic pattern film is referred to as the frequency selective surface, and is generally referred to in the art as the Frequency Selective Surface (FSS). FIG. 1A discloses an embodiment of an FSS film 10 comprising a pattern of conductive elements 11 repeated periodically in the vertical and horizontal directions, and disposed on a dielectric support 12. Each element 11 of the pattern has the shape 3037582 B13947 - B261 2 of a square with empty center. Each side of the square has a length d and a width s. The squares are repeated at one step p. The pattern of FIG. 1A is for example described in the article by R. J. Langley, E.A. Parker, "Equivalent circuit model 5 for arrays of square loops" - ELECTRONIC LETTERS 01.04.1982, Vol. 18, No. 7. FIG. 1B is a curve illustrating the transmission T (in decibels), as a function of the frequency f (in GHz), of a film FSS of the type of that of FIG. 1A when this film is placed on a partition or glass. This transmission curve has a maximum attenuation peak at the frequency of the transmission zero, the gain in decibels being substantially zero elsewhere. The aforementioned article indicates that the wavelength corresponding to the frequency of the transmission zero is substantially equal to the perimeter of a square 11. Conversely, filters intended to compensate for the involuntary shielding of a part or of a building against some electromagnetic waves have been made. Indeed, glazing coated with a metal oxide layer is particularly effective for thermal insulation but greatly attenuate radiofrequency electromagnetic waves. The article by G.I. Kiani, L.G. Olsson, A. Karlsson, K.P Esselle, M Nilsson, "Cross-Dipole Bandpass Frequency Selective Surface for Energy Saving Glass Used in Buildings" - IEEE 25 TRANSACTION ON ANTENNAS AND PROPAGATION, fev. 2011, Vol. 59, No. 2, discloses a periodic pattern of openings etched in the metal oxide layer of such a glazing which limits the attenuation for certain RF frequencies. The article mentions, however, that this etching results in a significant degradation of the thermal insulation of the glazing. SUMMARY Thus, there is a need to compensate for certain RF frequencies the attenuation of electromagnetic waves due to glazing coated with a metal oxide layer without modifying the thermal insulation performance of such glazings. An embodiment provides a glazing unit comprising a window whose one face is coated with a conductive layer, comprising at a non-zero distance from the conductive layer a periodic pattern of conductive elements adapted to increase, for a determined frequency, the transmission of radiofrequency electromagnetic waves, said periodic pattern being selected to have a transmission zero at a frequency between substantially half and substantially twice the frequency to be amplified. According to one embodiment, the periodic pattern of conductive elements is formed on a flexible and transparent dielectric support. According to one embodiment, the dielectric support is adherent to the glass. According to one embodiment, each conductive element has the form of a square with empty center. According to one embodiment, each conductive element has a circular shape. According to one embodiment, the glazing comprises two or three panes, and the conductive layer is formed on an inner face of a window. According to one embodiment, the conductive layer has a resistance of 1 to 1000 WU. According to one embodiment, the conductive layer is a layer of a metal oxide or a polymer. One embodiment provides a method for amplifying the transmission at a given frequency of a glazing unit comprising a window, one face of which is coated with a conductive layer, consisting in coating a glazing wall with a periodic pattern of conductive elements adapted to increase, for a given frequency, the transmission of radiofrequency electromagnetic waves, said periodic pattern being selected to have a transmission zero at a frequency of substantially half to substantially twice the frequency to be amplified. According to one embodiment, said determined frequency is a frequency used by telecommunications systems. BRIEF DESCRIPTION OF THE DRAWINGS These and other features and advantages will be set forth in detail in the following description of particular embodiments in a non-limiting manner with reference to the accompanying figures, of which: FIG. comprising a periodic pattern of conductive elements on a dielectric support; FIG. 1B is a graph illustrating the frequency-dependent transmission of an FSS film of the type of FIG. Figure 2 is a sectional view of an embodiment of a thermally insulating double glazing equipped with a FSS film; and FIG. 3 illustrates the evolution of the transmission T as a function of the frequency, under various conditions, of a glazing unit, one face of which is coated with a metal oxide layer.
    [0002] The same elements have been designated with the same references in the various figures and, moreover, the various figures are not drawn to scale. DETAILED DESCRIPTION In the description which follows, the terms "substantially" and "about" mean within 10%, preferably within 5%. Figure 2 is a sectional view of a thermally insulating double glazing. The double glazing 20 comprises a first pane 21 and a second pane 22 parallel. The window 21 has a thickness h1, an outer face 23 and an inner face 24. The window 22 has a thickness h2, an outer face 25 and an inner face 26. The inner faces 24 and 26 opposite are separated by a thickness h3 gas 28 can be in depression. The inner face 26 of the pane 22 is coated with a metal oxide layer 29.
    [0003] In practice, the abovementioned elements of a double glazing are connected by a frame, the assembly forming a window, a door or other partition. It is not possible to modify the assembly without destroying the product. The values of the parameters h1, h2 and h3 are therefore imposed by the manufacturer. In FIG. 2, a film FSS 10 comprising a pattern of conductive elements 11 and a dielectric support 12 is placed against the outer face 23 of the pane 21. The pattern 11 corresponds, for example, to that of FIG.
    [0004] FIG. 3 illustrates the evolution, as a function of the frequency f (in GHz), of the transmission T (in decibels) of a double-glazing 20, one face of which is coated with a metal oxide layer 29, in various conditions. The values of the transmission correspond to a double glazing 20 as shown in FIG. 2, the parameters of which are: h 1 = 4 mm, h 2 = 6 mm, and h 3 = 16 mm. Curve 40 corresponds to a double glazing 20, one face of which is coated with a metal oxide layer 29, in the absence of a film FSS. Curve 40 shows that there is then a substantially constant attenuation of the transmission of about 35 dB. Curve 50 illustrates the transmission of a double glazing 20, one face of which is coated with a metal oxide layer 29, equipped with a film FSS 10 on the outer face 23 of the pane 21, as represented by FIG. 2. There is then observed on the transmission attenuated by the double glazing 20 an attenuation peak 51 similar to that of Figure 1B. There is furthermore an amplification peak 52 as well as two low amplification lobes 53 and 54. The attenuation peak 51 is located at the attenuation frequency of the FSS 10 film. The amplification peak 52 is located at a higher frequency but close to the attenuation frequency and has an amplitude of about 10 dB greater than the average attenuation corresponding to the curve 40. The amplification lobes 53 and 54 are located on either side and at In the case of frequencies distant from the attenuation frequency, their amplitudes are approximately 3 dB relative to the average attenuation corresponding to the curve 40. The curve 60 illustrates the transmission of a double glazing 20 of which one side is coated with a metal oxide layer, equipped with a film FSS 10 on the outer face 25 of the pane 22. There is then observed on the attenuated transmission by the double-glazing 20, an attenuation peak 61 similar to that of Figure 1B as well as a The attenuation peak 61 is located at the attenuation frequency of the FSS film 10. The amplification peak 62 is located at a lower frequency but close to the attenuation frequency and an amplitude of about 10 dB greater than the average attenuation corresponding to the curve 40.
    [0005] It therefore appears that a film FSS placed against a double glazing, a face remote from this film is coated with a metal oxide conductive layer introduces not only a transmission zero, but also an amplification peak close to transmission zero.
    [0006] Tests and simulations carried out by the inventors show that, for a given double glazing (whose parameters h1, h2 and h3 are fixed), there always exists an amplification peak close to the transmission zero. The frequency distance between the transmission zero and the amplification peak depends on the parameters of the glazing and can be determined by calculations involving simulation steps. In the case of loop FSS patterns of the type shown in FIG. 1A, if f0 is the frequency of the amplification peak, the frequency of the transmission zero is between substantially f0 / 2 or 2f0.
    [0007] More particularly, the calculation of the position of the amplification peak (resonance) is done using a software for calculating commercial electromagnetic simulations (of the HFSS or CST type). The first step of the method is to make a 3-dimensional physical modeling of the FSS structure (for example using the Floquet theorem principle) superimposed on the window and located at a non-zero distance from the window. the weakly conductive layer of metal oxide. To position the amplification peak, the second step is to optimize the dimensions of the FSS structure in an iterative manner by varying the dimensions of the FSS structure. Many studies indicate how to determine the elements of an FSS pattern to obtain an attenuation peak at a desired frequency. As previously indicated, in the case of a pattern corresponding to that of FIG. 1A, the wavelength corresponding to the attenuation frequency is substantially equal to the perimeter of a conductive element of this pattern. The presence of these amplification peaks is attributed to the adaptation of the impedance of the reinforced insulation window to that of the air (377 Ohm) thanks to the FSS structures deposited at a non-zero distance from the conductive layer. Particular embodiments have been described. Various variations and modifications will be apparent to those skilled in the art.
    [0008] The FSS patterns described above are formed on a flexible and transparent dielectric support or film that can be adhered to the glass in order to be applied to permanently assembled glazings, possibly already mounted. These FSS patterns can also be formed directly on a glass.
    [0009] The frequency of the amplification peak will correspond, for example, to a frequency used by telecommunication systems. The conductive elements distributed according to the pattern represented by FIG. 1A may have a shape other than square, for example a circular or even rectilinear shape. In addition, an embodiment has been described in which the invention is applied to double glazing. The invention also applies to the case of thermally insulating triple glazing or even of a single pane whose one face is coated with a conductive layer having for example an antireflection function.
    [0010] This conductive layer will have, for example, a resistance of 1 to 1000 WU. This layer will not necessarily be a metal oxide. This will be for example a polymer or a multilayer in the case of an antireflection.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Glazing pane comprising a window, one face of which is coated with a conductive layer (29), having at a non-zero distance from the conductive layer a periodic pattern of conductive elements (11) adapted to increase, for a given frequency, the radiofrequency electromagnetic wave transmission, said periodic pattern being selected to have a transmission zero at a frequency of substantially half to substantially twice the frequency to be amplified.
    [0002]
    The glazing according to claim 1, wherein the periodic pattern of conductive elements is formed on a flexible and transparent dielectric support (12).
    [0003]
    3. Glazing according to claim 2, wherein the dielectric support is adherent to the glass.
    [0004]
    4. Glazing according to any one of claims 1 to 3, wherein each conductive element is in the form of a square with empty center.
    [0005]
    5. Glazing according to any one of claims 1 to 3, wherein each conductive element has a circular shape.
    [0006]
    6. Glazing according to any one of claims 1 to 5, comprising two or three panes, wherein the conductive layer is formed on an inner face of a window.
    [0007]
    7. Glazing according to any one of claims 1 to 6, wherein the conductive layer has a resistance of 1 to 1000 WU. 25
    [0008]
    8. Glazing according to claim 7, wherein the conductive layer is a layer of a metal oxide or a polymer.
    [0009]
    9. A method of amplifying the transmission at a given frequency of a glazing unit comprising a window, one face of which is coated with a conductive layer (29), consisting in coating a wall of the glazing with a periodic pattern of elements. conductors (11), adapted to increase, for a given frequency, the transmission of radiofrequency electromagnetic waves, said periodic pattern being chosen to have a transmission zero at a frequency of between substantially one-half and substantially twice that of the frequency to be amplified.
    [0010]
    The method of claim 9, wherein said determined frequency is a frequency used by telecommunications systems.
    类似技术:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20030080909A1|2001-10-25|2003-05-01|Voeltzel Charles S.|Coated substrate having a frequency selective surface|
    US20110210903A1|2010-02-26|2011-09-01|The Regents Of The University Of Michigan|Frequency-selective surface structures|
    US20140370210A1|2011-12-14|2014-12-18|Eads Deutschland Gmbh|Radar Reflection Absorbing Glazing|
    WO2014060203A1|2012-10-15|2014-04-24|Saint-Gobain Glass France|Panel with high-frequency transmission|
    FR1555638A|1967-09-20|1969-01-31|
    US8687175B2|2011-05-05|2014-04-01|Siemens Energy, Inc.|Fluid flow velocity and temperature measurement|
    GB201320257D0|2013-11-16|2014-01-01|Pilkington Group Ltd|Glazing|CN113224544A|2019-09-10|2021-08-06|Oppo广东移动通信有限公司|Housing assembly and electronic device|
    TWI719840B|2019-11-15|2021-02-21|符仙瓊|Dielectric structures applied to building components for increasing the penetration capability of rf signals and manufacturing methods thereof|
    CN111129780B|2019-12-28|2021-11-23|华南理工大学|Structure for improving oblique incidence characteristic of glass material in 5G millimeter wave frequency band|
    法律状态:
    2016-06-17| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-23| PLSC| Publication of the preliminary search report|Effective date: 20161223 |
    2017-06-16| PLFP| Fee payment|Year of fee payment: 3 |
    2017-07-14| TQ| Partial transmission of property|Owner name: CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, C, FR Effective date: 20170614 Owner name: INSTITUT POLYTECHNIQUE DE GRENOBLE, FR Effective date: 20170614 Owner name: UNIVERSITE GRENOBLE ALPES, FR Effective date: 20170614 |
    2018-06-14| PLFP| Fee payment|Year of fee payment: 4 |
    2020-06-26| PLFP| Fee payment|Year of fee payment: 6 |
    2021-04-23| CL| Concession to grant licences|Name of requester: SATT LINKSIUM GRENOBLE ALPES, FR Effective date: 20210317 |
    2021-06-30| PLFP| Fee payment|Year of fee payment: 7 |
    2022-01-07| TQ| Partial transmission of property|Owner name: UNIVERSITE GRENOBLE ALPES, FR Effective date: 20211130 Owner name: INSTITUT POLYTECHNIQUE DE GRENOBLE, FR Effective date: 20211130 Owner name: CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, C, FR Effective date: 20211130 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1555638A|FR3037582B1|2015-06-19|2015-06-19|METHOD FOR INCREASING THE TRANSMISSION OF RADIOFREQUENCY ELECTROMAGNETIC WAVES THROUGH THERMALLY INSULATING WINDOWS|FR1555638A| FR3037582B1|2015-06-19|2015-06-19|METHOD FOR INCREASING THE TRANSMISSION OF RADIOFREQUENCY ELECTROMAGNETIC WAVES THROUGH THERMALLY INSULATING WINDOWS|
    US15/737,198| US10741928B2|2015-06-19|2016-06-17|Method for increasing the transmission of radiofrequency electromagnetic waves through thermally insulating glass sheets|
    EP16741089.3A| EP3310730A1|2015-06-19|2016-06-17|Method for increasing the transmission of radiofrequency electromagnetic waves through thermally insulating glass sheets|
    CN201680035942.0A| CN107848874B|2015-06-19|2016-06-17|Method for increasing transmission of radio frequency electromagnetic waves through insulating glass sheets|
    PCT/FR2016/051489| WO2016203180A1|2015-06-19|2016-06-17|Method for increasing the transmission of radiofrequency electromagnetic waves through thermally insulating glass sheets|
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