EP0121655A2 - Matériau à fibres - Google Patents

Matériau à fibres Download PDF

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Publication number
EP0121655A2
EP0121655A2 EP84100476A EP84100476A EP0121655A2 EP 0121655 A2 EP0121655 A2 EP 0121655A2 EP 84100476 A EP84100476 A EP 84100476A EP 84100476 A EP84100476 A EP 84100476A EP 0121655 A2 EP0121655 A2 EP 0121655A2
Authority
EP
European Patent Office
Prior art keywords
composite material
fiber composite
material according
fillers
layers
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP84100476A
Other languages
German (de)
English (en)
Other versions
EP0121655A3 (fr
Inventor
Klaus Dipl.-Ing. Eggert
Manfred Dr.-Ing. Flemming
Siegfried Dipl.-Ing. Roth
Horst Dipl.-Ing. Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dornier GmbH
Original Assignee
Dornier GmbH
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 Dornier GmbH filed Critical Dornier GmbH
Publication of EP0121655A2 publication Critical patent/EP0121655A2/fr
Publication of EP0121655A3 publication Critical patent/EP0121655A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/002—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using short elongated elements as dissipative material, e.g. metallic threads or flake-like particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/902—High modulus filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/919—Camouflaged article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/67—Multiple nonwoven fabric layers composed of the same inorganic strand or fiber material

Definitions

  • the invention relates to a fiber composite material, consisting of individual layers of stacked fiber layers arranged one above the other and connected to one another by a matrix consisting of a resin and hardener, e.g. Glass fiber prepregs, as a supporting structure for the absorption of electromagnetic waves.
  • a resin and hardener e.g. Glass fiber prepregs
  • Fiber composite materials for load-bearing structures are characterized by high specific strength and rigidity. The strength and stiffness are largely determined by the fiber used and the fiber volume fraction.
  • the matrix usually an organic resin, connects the individual fibers into a composite material, which places high chemical and mechanical demands on the matrix.
  • fiber composite materials are predominantly used in aircraft construction, which are layered from so-called prepregs (a pre-impregnated fiber fabric) and which are hardened in the autoclave process.
  • DE-OS 31 17 245 discloses a method for camouflaging any, predominantly metallic objects against radar detection, and for protecting any objects against electromagnetic fields, in which the objects have a metallized textile pile material in whole or in part on the side that has the pole comes to lie in the direction of the incident radiation.
  • DIE is a p olware on an object surface, for example by adhesive bonding, additional layer, and thus an additional weight and no has a supporting function.
  • Polware is unsuitable for application to the outside surfaces of aircraft because of its insufficient strength under stress, eg against rain erosion and aerodynamic surface quality.
  • the absorption mechanism is tuned for pile fabric to a larger or deeper structural geometry such that, in order to achieve sufficient absorption, the thickness of the layer and thus their weight g ross.
  • the advantage of the invention is that the embedded into the superimposed layers of the anaeordneten fiber composite fillers q the incident electromagnetic waves over the thickness of the fiber composite in a maximum Fre uenzbandbreite absorb or dampen maximum.
  • the fiber composite forms together with the fillers embedded in it in different densities across the thickness of the individual layers also provide a supporting structure.
  • this applies to future developments in the construction of aircraft, missiles, satellites and ships, in which a high proportion of fiber composite materials is used.
  • a fiber composite material 7 consisting of individual layers 1, 2, 3, 4, 5, 6, of which the outer layer 1, which borders the incident electromagnetic waves 8 (see directional arrows) and the inner layer 9, is transparent and the inner one Layer 6 for the electromagnetic waves 8 is reflective.
  • the layers 2, 3, 4, 5 arranged therebetween act as absorption layers for the electromagnetic waves 8 due to the fillers 10 arranged therein in increasing concentration.
  • Layers 1 and 2 consist of an aramid fiber prepreg, which is composed of 50% aramid fibers and 50% epoxy resin.
  • a resin with a low dielectric constant E is used for high requirements.
  • the layers 3, 4 and 5 are also an aramid fiber prepreg, in which, however, the impregnating resin used for this purpose is interspersed with fillers 10 which absorb the electromagnetic waves 8, for example iron or ferrite powder and / or with substances which increase conductivity, such as graphite or carbon.
  • the mixing ratios Resin / fillers are optimized in terms of absorption, reflection, frequency bandwidth and the loss of strength that occurs when the filler content is too high.
  • the layer 6 consists of a carbon fiber prepre g and forms a reflector for the electromagnetic waves 8 still arriving through the layers 1, 2, 3, 4, 5, so that the waves 8 reaching this layer 6 follow the reflected path (see directional arrows ) must again pass through layers 5, 4, 3, 2, 1 acting as absorbers (dampers) in the opposite direction and be absorbed or damped to such an extent that there is practically a greatly reduced exit at layer 1.
  • the arrangement of the layer 6 as a reflector with respect to the transparent layer 1 can be selected such that the electromagnetic waves 8 are extinguished in a specific frequency range (interference effect).
  • the fiber composite 7 can be shaped when the individual layers 1, 2, 3, 4, 5, 6 are layered by inserting them into a corresponding shape (not shown in the figure). It is also possible to insert or attach the package of the fiber composite 7 into a mold and to carry out the shaping or shaping by rolling onto the wall of the mold.
  • the curing of the Layers lying one above the other are carried out in an autoclave (not shown in the figure), for example under a pressure of approx. 3.5 bar and at a temperature of approx. 120 ° C, similar to the process customary in fiber composite parts production in aircraft construction is. If the resin / hardener combination is selected accordingly, curing at room temperature (approx. 20 ° C) is also possible.
  • embodiments are also possible in which the individual layers 1, 2, 3, 4, 5, 6 differ in their thicknesses d 1 from one another and the total thickness d 2 of the fiber composite material 7 resulting therefrom changes accordingly.
  • Fillers 10 can also be embedded in the transparent layer 1 adjacent to the air layer 9. This also applies to the inner layer 6, which then no longer has to act as a reflector.
  • the curve of the concentration of the fillers 10 stored in the individual layers 1, 2, 3, 4, 5 is shown in a curve 11 in FIG. This shows the arrangement of the fillers 10 that is becoming denser from layer 1 to layer 5. This means that the ⁇ / ⁇ absorption and damping of the electromagnetic waves 8 increase with increasing concentration. The rest of the waves 8 remaining in the layer 5 experiences a reflection at the adjacent layer 6 and passes through the individual layers in the opposite direction 5, 4, 3, 2, 1 (see directional arrows).

Landscapes

  • Laminated Bodies (AREA)
  • Reinforced Plastic Materials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Aerials With Secondary Devices (AREA)
EP84100476A 1983-03-01 1984-01-18 Matériau à fibres Withdrawn EP0121655A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833307066 DE3307066A1 (de) 1983-03-01 1983-03-01 Mehrschichtiger faserverbundwerkstoff
DE3307066 1983-03-01

Publications (2)

Publication Number Publication Date
EP0121655A2 true EP0121655A2 (fr) 1984-10-17
EP0121655A3 EP0121655A3 (fr) 1986-04-16

Family

ID=6192110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100476A Withdrawn EP0121655A3 (fr) 1983-03-01 1984-01-18 Matériau à fibres

Country Status (4)

Country Link
US (1) US4581284A (fr)
EP (1) EP0121655A3 (fr)
JP (1) JPS59176035A (fr)
DE (1) DE3307066A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238291A1 (fr) * 1986-03-18 1987-09-23 Nippon Carbon Co., Ltd. Dispositif pour absorber les ondes électromagnétiques
GB2192756A (en) * 1986-07-07 1988-01-20 Hoybond Limited Energy absorbing coatings and their use in camouflage
EP0318873A1 (fr) * 1987-11-28 1989-06-07 Toppan Printing Co., Ltd. Elément absorbant pour ondes électromagnétiques
EP0323826A1 (fr) * 1988-01-05 1989-07-12 Nec Corporation Absorbant pour ondes électromagnétiques
EP0377878A1 (fr) * 1989-01-13 1990-07-18 Deutsche Aerospace AG Structure d'un front d'un bâtiment à isolation calorifuge et procédé pour produire une isolation
EP0377879A1 (fr) * 1989-01-13 1990-07-18 Deutsche Aerospace AG Eléments plans pour l'absorption ou la réduction de la réflexion d'ondes électromagnétiques
FR2647601A1 (fr) * 1985-09-25 1990-11-30 Dornier Gmbh Materiau composite renforce de fibres
EP0411198A1 (fr) * 1988-05-27 1991-02-06 G + H Montage Gmbh Absorbeur pour ondes électromagnétiques et acoustiques
EP0742095A2 (fr) * 1995-05-12 1996-11-13 Oto Melara S.p.A. Structure de matériau composite apte à absorber et dissiper l'énergie de rayonnement électromagnétique incident, notamment pour véhicules routiers, aéronefs et navires et pour installations fixées à la terre
FR2772520A1 (fr) * 1997-12-11 1999-06-18 Giat Ind Sa Materiau composite structural absorbant les ondes radar et utilisation d'un tel materiau

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508888A1 (de) * 1985-03-13 1986-09-25 Battelle-Institut E.V., 6000 Frankfurt Duennschichtabsorber fuer elektromagnetische wellen
FR2689687B1 (fr) * 1985-12-30 1994-09-02 Poudres & Explosifs Ste Nale Procédé de fixation d'un élément absorbant les ondes électromagnétiques sur une paroi d'une structure ou infrastructure.
JPS62265799A (ja) * 1986-05-14 1987-11-18 横浜ゴム株式会社 多層型電波吸収材の製造方法
JPS62257839A (ja) * 1986-05-06 1987-11-10 町田　輝史 繊維強化プラスチツク複合薄板及びその成形方法
US5576710A (en) * 1986-11-25 1996-11-19 Chomerics, Inc. Electromagnetic energy absorber
US5325094A (en) * 1986-11-25 1994-06-28 Chomerics, Inc. Electromagnetic energy absorbing structure
US4851264A (en) * 1986-12-08 1989-07-25 Magneco/Metrel, Inc. Reinforcement of refractories by pore saturation with particulated fillers
US4888235A (en) * 1987-05-22 1989-12-19 Guardian Industries Corporation Improved non-woven fibrous product
FR2748719B1 (fr) * 1987-06-26 1999-05-07 Aerospatiale Pale a faible signature radar
DE3722793A1 (de) * 1987-07-10 1989-01-19 Licentia Gmbh Radartarnmaterial
US4940619A (en) * 1987-10-05 1990-07-10 Smith Novis W Jr Radiation absorption device
GB2234857B (en) * 1987-10-07 1992-05-20 Courtaulds Plc Microwave-absorbing materials
US4818584A (en) * 1987-12-03 1989-04-04 General Dynamics Corp. Arresting delamination in composite laminate
FR2737347B1 (fr) * 1988-11-17 1997-12-19 Alsthom Cge Alcatel Structure pour l'absorption d'ondes electromagnetiques
CH679331A5 (fr) * 1989-08-11 1992-01-31 Atlantis Energie Ag
DE3928018A1 (de) * 1989-08-24 1991-02-28 Gruenzweig & Hartmann Verfahren zur herstellung eines flaechenelementes zur absorption von elektromagnetischen wellen
US5312678A (en) * 1989-10-06 1994-05-17 The Dow Chemical Company Camouflage material
DE3936291A1 (de) * 1989-11-01 1991-05-02 Herberts Gmbh Material mit radarabsorbierenden eigenschaften und dessen verwendung bei verfahren zur tarnung gegen radarerfassung
DE3940303A1 (de) * 1989-12-06 1991-06-13 Messerschmitt Boelkow Blohm Schutzelement fuer metallische und/oder metallisierte bauteile
DE4005676A1 (de) * 1990-02-22 1991-08-29 Buchtal Gmbh Absorber fuer elektromagnetische wellen
US5381149A (en) * 1992-04-17 1995-01-10 Hughes Aircraft Company Broadband absorbers of electromagnetic radiation based on aerogel materials, and method of making the same
US5474837A (en) * 1994-01-21 1995-12-12 The United States Government As Represented By The Secretary Of The Army Laminated paper glass camouflage
DE9408490U1 (de) * 1994-05-25 1995-09-28 Ernst Fehr technische Vertretungen und Beratung, Goldach Strahlenschirmschutzauflage
WO1996010278A1 (fr) * 1994-09-28 1996-04-04 Anatoly Vasilievich Mareichev Materiau de protection contre le rayonnement
US5552455A (en) * 1995-08-31 1996-09-03 Lockheed Corporation Radar absorbing material and process for making same
WO1999005752A2 (fr) * 1997-07-23 1999-02-04 Cuming Microwave Corporation Absorbeur de radar et son procede de fabrication
JP3563260B2 (ja) * 1998-03-02 2004-09-08 Ｔｄｋ株式会社 チップ型インピーダンス素子
US20060007034A1 (en) * 2004-07-07 2006-01-12 Wen-Jang Yen Composite radar absorption structure with a thin shell type and method for manufacturing the same
US7212147B2 (en) * 2004-07-19 2007-05-01 Alan Ross Method of agile reduction of radar cross section using electromagnetic channelization
JP2010080911A (ja) * 2008-04-30 2010-04-08 Tayca Corp 広帯域電磁波吸収体及びその製造方法
US20100258111A1 (en) * 2009-04-07 2010-10-14 Lockheed Martin Corporation Solar receiver utilizing carbon nanotube infused coatings
CN102458825A (zh) * 2009-04-24 2012-05-16 应用纳米结构方案公司 基于cnt的信号控制材料
US9111658B2 (en) 2009-04-24 2015-08-18 Applied Nanostructured Solutions, Llc CNS-shielded wires
WO2010129234A2 (fr) * 2009-04-27 2010-11-11 Lockheed Martin Corporation Chauffage résistif à base de nanotubes de carbone pour dégivrer des structures composites
US20110089958A1 (en) * 2009-10-19 2011-04-21 Applied Nanostructured Solutions, Llc Damage-sensing composite structures
US9167736B2 (en) * 2010-01-15 2015-10-20 Applied Nanostructured Solutions, Llc CNT-infused fiber as a self shielding wire for enhanced power transmission line
CA2789664A1 (fr) * 2010-03-02 2011-09-09 Applied Nanostructured Solutions, Llc Dispositifs electriques contenant des fibres infusees aux nanotubes de carbone et procedes de production associes
JP2013521656A (ja) 2010-03-02 2013-06-10 アプライド ナノストラクチャード ソリューションズ リミテッド ライアビリティー カンパニー カーボン・ナノチューブ浸出電極材料を含む螺旋に巻き付けられた電気機器及びその生産方法並びに生産装置
US8780526B2 (en) 2010-06-15 2014-07-15 Applied Nanostructured Solutions, Llc Electrical devices containing carbon nanotube-infused fibers and methods for production thereof
CA2782976A1 (fr) 2010-09-23 2012-03-29 Applied Nanostructured Solutions, Llc Fibre infusee avec des cnt a titre de fil auto-blinde pour cable electrique ameliore
US20130099956A1 (en) * 2011-10-24 2013-04-25 Lsi Corporation Apparatus to reduce specific absorption rate
US9033672B2 (en) * 2012-01-11 2015-05-19 General Electric Company Wind turbines and wind turbine rotor blades with reduced radar cross sections
US9085464B2 (en) 2012-03-07 2015-07-21 Applied Nanostructured Solutions, Llc Resistance measurement system and method of using the same
PE20150113A1 (es) * 2012-03-30 2015-02-19 Micromag 2000 Sl Atenuador de radiacion electromagnetica
RU2578769C2 (ru) * 2014-02-14 2016-03-27 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Устройство из полимерных композитных материалов для снижения радиолокационной заметности объектов различного назначения
US10351077B2 (en) * 2015-08-25 2019-07-16 Mazda Motor Corporation Vehicle member

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440655A (en) * 1966-02-26 1969-04-22 Electro Gmbh & Co Space absorbers for electromagnetic waves
DE1591244A1 (de) * 1967-10-28 1970-10-29 Kalle Ag Gegenueber Mikrowellen reflexionsarmes Verbundelement
US4162496A (en) * 1967-04-03 1979-07-24 Rockwell International Corporation Reactive sheets

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977522C (de) * 1957-01-15 1966-11-03 Eltro G M B H & Co Ges Fuer St Verpackungsmaterial in Form von Behaeltern mit Interferenzabsorption fuer elektromagnetische Wellen
NL112646C (fr) * 1958-12-04
US4186648A (en) * 1977-06-07 1980-02-05 Clausen Carol W Armor comprising ballistic fabric and particulate material in a resin matrix
DE3024888A1 (de) * 1980-07-01 1982-02-04 Bayer Ag, 5090 Leverkusen Verbundmaterial zur abschirmung elektromagnetischer strahlung
DE3117245A1 (de) * 1981-04-30 1982-11-18 Bayer Ag, 5090 Leverkusen Verwendung textiler metallisierter polwaren als mikrowellenabsorber
JPS58169997A (ja) * 1982-03-31 1983-10-06 日本カ−ボン株式会社 電波吸収体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440655A (en) * 1966-02-26 1969-04-22 Electro Gmbh & Co Space absorbers for electromagnetic waves
US4162496A (en) * 1967-04-03 1979-07-24 Rockwell International Corporation Reactive sheets
DE1591244A1 (de) * 1967-10-28 1970-10-29 Kalle Ag Gegenueber Mikrowellen reflexionsarmes Verbundelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZEITSCHRIFT F]R ANGEWANDTE PHYSIK, Band 16, Nr. 3, 17. September 1963, Seiten 162-167; H.W. HELBERG et al.: "Ein Mehrschichtabsorber f}r elektromagnetische Zentimeterwellen" *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647601A1 (fr) * 1985-09-25 1990-11-30 Dornier Gmbh Materiau composite renforce de fibres
EP0238291A1 (fr) * 1986-03-18 1987-09-23 Nippon Carbon Co., Ltd. Dispositif pour absorber les ondes électromagnétiques
GB2192756A (en) * 1986-07-07 1988-01-20 Hoybond Limited Energy absorbing coatings and their use in camouflage
US5095311A (en) * 1987-11-28 1992-03-10 Toppan Printing Co., Ltd. Electromagnetic wave absorbing element
EP0318873A1 (fr) * 1987-11-28 1989-06-07 Toppan Printing Co., Ltd. Elément absorbant pour ondes électromagnétiques
EP0323826A1 (fr) * 1988-01-05 1989-07-12 Nec Corporation Absorbant pour ondes électromagnétiques
EP0411198A1 (fr) * 1988-05-27 1991-02-06 G + H Montage Gmbh Absorbeur pour ondes électromagnétiques et acoustiques
EP0377878A1 (fr) * 1989-01-13 1990-07-18 Deutsche Aerospace AG Structure d'un front d'un bâtiment à isolation calorifuge et procédé pour produire une isolation
EP0377879A1 (fr) * 1989-01-13 1990-07-18 Deutsche Aerospace AG Eléments plans pour l'absorption ou la réduction de la réflexion d'ondes électromagnétiques
US5083127A (en) * 1989-01-13 1992-01-21 Messerschmitt-Bolkow-Blohm Gmbh Thermal barrier facade construction of high rise structures and a process for fabrication of a thermal barrier
EP0742095A2 (fr) * 1995-05-12 1996-11-13 Oto Melara S.p.A. Structure de matériau composite apte à absorber et dissiper l'énergie de rayonnement électromagnétique incident, notamment pour véhicules routiers, aéronefs et navires et pour installations fixées à la terre
EP0742095A3 (fr) * 1995-05-12 1998-05-06 Oto Melara S.p.A. Structure de matériau composite apte à absorber et dissiper l'énergie de rayonnement électromagnétique incident, notamment pour véhicules routiers, aéronefs et navires et pour installations fixées à la terre
FR2772520A1 (fr) * 1997-12-11 1999-06-18 Giat Ind Sa Materiau composite structural absorbant les ondes radar et utilisation d'un tel materiau
EP0924798A1 (fr) * 1997-12-11 1999-06-23 Giat Industries Matériau composite structural absorbant les ondes radar et utilisation d'un tel materiau
US6111534A (en) * 1997-12-11 2000-08-29 Giat Industries Structural composite material absorbing radar waves and use of such a material

Also Published As

Publication number Publication date
DE3307066A1 (de) 1984-09-13
EP0121655A3 (fr) 1986-04-16
US4581284A (en) 1986-04-08
JPS59176035A (ja) 1984-10-05

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