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WO1993015530A1 - Absorbeur pour ondes electromagnetiques - Google Patents

Absorbeur pour ondes electromagnetiques Download PDF

Info

Publication number
WO1993015530A1
WO1993015530A1 PCT/EP1993/000258 EP9300258W WO9315530A1 WO 1993015530 A1 WO1993015530 A1 WO 1993015530A1 EP 9300258 W EP9300258 W EP 9300258W WO 9315530 A1 WO9315530 A1 WO 9315530A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam
absorber according
absorber
particular according
bodies
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.)
Ceased
Application number
PCT/EP1993/000258
Other languages
German (de)
English (en)
Inventor
Jürgen Hess
Günther KASPAREK
Bernhard Korte
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.)
Illbruck GmbH
Original Assignee
Illbruck 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 Illbruck GmbH filed Critical Illbruck GmbH
Publication of WO1993015530A1 publication Critical patent/WO1993015530A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0001—Rooms or chambers

Definitions

  • the invention relates to absorbers for electromagnetic waves, in particular for reducing reflection, in closed, shielded rooms, consisting of spatial bodies made of foam soaked with finely divided, conductive materials, which are fastened next to one another on the walls of the room to be shielded.
  • Such absorbers serve to absorb and reduce reflection of electromagnetic waves, in particular in the case of radio interference and immunity measurements, radar cross-sectional measurements and measurements or electromagnetic compatibility in metal-shielded rooms.
  • the inner wall and ceiling surfaces and partly also the floor area are lined with suitable absorbers.
  • Such absorbers are known for example from DE 37 03 755.2 AI. These absorbers consist of pyramid-shaped bodies made of foam, which are impregnated with finely divided, conductive materials and
  • the impregnation material consists of graphite and / or conductivity black.
  • the corresponding pyramid-shaped absorbers consist of solid foam and are cut out of appropriate blocks. They are also impregnated with an appropriate dispersion as a whole, the excess dispersion liquid then being pressed out again by mechanical pressing and the pyramids then being dried in drying ovens.
  • this method has the disadvantages that, once the dispersion liquid has been squeezed out, an adjustable and uniform loading with conductive particles can practically not be achieved and also cannot be controlled, and that drying, especially of large-volume pyramids, requires a high amount of heating and time and a correspondingly high capacity Drying ovens required, which limits manufacturing and delivery capacity.
  • the bodies have a triangular cross section and are cut out in sections from individual, uniformly impregnated foam sheets and are used to form the final one 75 body shapes are joined together.
  • the bodies can be pointed cones or pyra
  • the foam sheets are advantageously with a
  • Fig. 1 shows a cross section through a hollow absorber
  • Fig. 3 is a partial section through the folded edge of a
  • Fig. 4 shows a cross section through an absorber body
  • Fig. 5 is a plan view of such a body.
  • Fig. 1 shows a section through a pyramid-shaped
  • This body 1 is on the bottom side
  • loxides or a mixture of metal oxides and ceramic 186 see materials contains, to a predetermined content
  • Such conical absorbers can be special
  • 228 gel or pyramid shape can, however, be
  • This absorber body 20 is there

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

Absorbeurs pour ondes électromagnétiques dans des espaces fermés, blindés, comportant des corps tridimensionnels, imprégnés de matériaux conducteurs se présentant sous forme de particules. Ces corps en mousse aléolaire, sont fixés de manière hermétique les uns à côté des autres contre la paroi de l'espace à blinder. Afin de simplifier leur fabrication et d'assurer une imprégnation précise, il est prévu selon l'invention, que les corps (1; 20) ait une section transversale triangulaire, qu'ils soient découpés dans des bandes de mousse (2-5) imprégnées de manière homogène et qu'ils soient assemblés pour qu'ils prennent leur forme définitive.
PCT/EP1993/000258 1992-02-04 1993-02-04 Absorbeur pour ondes electromagnetiques Ceased WO1993015530A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4203113 1992-02-04
DEP4203113.3 1992-02-04

Publications (1)

Publication Number Publication Date
WO1993015530A1 true WO1993015530A1 (fr) 1993-08-05

Family

ID=6450918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/000258 Ceased WO1993015530A1 (fr) 1992-02-04 1993-02-04 Absorbeur pour ondes electromagnetiques

Country Status (1)

Country Link
WO (1) WO1993015530A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995000983A1 (fr) * 1993-06-25 1995-01-05 Nimtz Guenter Agencement pour l'absorption d'ondes electromagnetiques et son procede de realisation
EP0938254A4 (fr) * 1997-09-09 2001-01-17 Nisshin Spinning Ecran absorbant d'ondes radio non inflammable
CN117416026A (zh) * 2023-10-16 2024-01-19 亿策科技有限公司 一种蜂窝状泡沫吸波材料、制备方法及加工设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464006A (en) * 1944-04-28 1949-03-08 Philco Corp Radio wave absorption device
GB1144457A (en) * 1965-07-29 1969-03-05 Siemens Ag Improvements in or relating to absorbers for radio waves
US3836967A (en) * 1958-03-10 1974-09-17 R Wright Broadband microwave energy absorptive structure
US4050073A (en) * 1976-01-14 1977-09-20 Ludwig Wesch Support for foam absorber of electromagnetic waves
DE3703755A1 (de) * 1987-02-07 1988-08-18 Rheinhold & Mahla Gmbh Absorber fuer elektromagnetische strahlen
US5081455A (en) * 1988-01-05 1992-01-14 Nec Corporation Electromagnetic wave absorber

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464006A (en) * 1944-04-28 1949-03-08 Philco Corp Radio wave absorption device
US3836967A (en) * 1958-03-10 1974-09-17 R Wright Broadband microwave energy absorptive structure
GB1144457A (en) * 1965-07-29 1969-03-05 Siemens Ag Improvements in or relating to absorbers for radio waves
US4050073A (en) * 1976-01-14 1977-09-20 Ludwig Wesch Support for foam absorber of electromagnetic waves
DE3703755A1 (de) * 1987-02-07 1988-08-18 Rheinhold & Mahla Gmbh Absorber fuer elektromagnetische strahlen
US5081455A (en) * 1988-01-05 1992-01-14 Nec Corporation Electromagnetic wave absorber

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995000983A1 (fr) * 1993-06-25 1995-01-05 Nimtz Guenter Agencement pour l'absorption d'ondes electromagnetiques et son procede de realisation
EP0938254A4 (fr) * 1997-09-09 2001-01-17 Nisshin Spinning Ecran absorbant d'ondes radio non inflammable
CN117416026A (zh) * 2023-10-16 2024-01-19 亿策科技有限公司 一种蜂窝状泡沫吸波材料、制备方法及加工设备
CN117416026B (zh) * 2023-10-16 2024-06-11 亿策科技有限公司 一种蜂窝状泡沫吸波材料、制备方法及加工设备

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