GB776158A - Improvements in or relating to absorbers for radio waves - Google Patents

Improvements in or relating to absorbers for radio waves

Info

Publication number
GB776158A
GB776158A GB6735/54A GB673554A GB776158A GB 776158 A GB776158 A GB 776158A GB 6735/54 A GB6735/54 A GB 6735/54A GB 673554 A GB673554 A GB 673554A GB 776158 A GB776158 A GB 776158A
Authority
GB
United Kingdom
Prior art keywords
sheets
coating
wall
thickness
lossy
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.)
Expired
Application number
GB6735/54A
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.)
WERNER GENEST GES fur ISOLIERU
Original Assignee
WERNER GENEST GES fur ISOLIERU
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 WERNER GENEST GES fur ISOLIERU filed Critical WERNER GENEST GES fur ISOLIERU
Publication of GB776158A publication Critical patent/GB776158A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

776,158. Radio wave absorbers. GENEST GES. FUR ISOLIERUNGEN, W. March 8, 1954 [March 28, 1953], No. 6735/54. Class 40(7) [Also in Group XIII] In order to prevent the reflection of radio waves from the walls of a test chamber, thin parallel sheets, Figs. 1-16 or tubes, Figs. 18, 19 (not shown) spaced approximately #/3 are mounted so as to project from the surface of the wall 1, the attachments being formed of or coated with electric and/or magnetic lossy material such that the effective loss resistance decreases towards the surface of the wall. When parallel sheets are employed they may be disposed perpendicularly to the wall or at an acute angle thereto, Fig. 7 (not shown) and may comprise sheets 2 of loss-free material (thickness ¢-3 mm) such as paper, wood or polystyrene with a coating 3 (thickness 0.02-0.2 mm.) of lossy material such as graphite or powedered iron. The required resistance variation is acheived by increasing the thickness of the coating 3 in steps, Fig. 5, or uniformly, Figs. 7 and 8 (not shown), from the free edge of the sheet towards the edge attached to the wall or the coating may be of uniform thickness the free edges of the sheets being serrated, Fig. 1 and Figs. 3, 4, 11-14 (not shown) and/or the height of the sheets being varied cyclically, Figs. 9 and Figs. 11-14 (not shown). In order to absorb waves polarized in any direction magnetic and electric lossy coatings are arranged alternately or each coating may comprise magentic and electric lossy materials or a further set of parallel sheets is disposed perependicularly to the first set in egg box form, Figs. 3, 4, 13 and 14 (not shown). In a modification, Figs. 15 and 16 (not shown), capable also of absorbing sound waves, the sheets are perforated and the spaces between the sheets are filled with sound absorbing material such as glass fibre plates. The Specification refers to a known form of absorber comprising dielectric layers with interposed conductive films whose surface resistance decreases towards the base.
GB6735/54A 1953-03-28 1954-03-08 Improvements in or relating to absorbers for radio waves Expired GB776158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE776158X 1953-03-28

Publications (1)

Publication Number Publication Date
GB776158A true GB776158A (en) 1957-06-05

Family

ID=25948092

Family Applications (2)

Application Number Title Priority Date Filing Date
GB6735/54A Expired GB776158A (en) 1953-03-28 1954-03-08 Improvements in or relating to absorbers for radio waves
GB28558/55A Expired GB797610A (en) 1953-03-28 1955-10-06 Improvements in or relating to low reflection absorbers for absorbing or minimising reflection of radio waves

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB28558/55A Expired GB797610A (en) 1953-03-28 1955-10-06 Improvements in or relating to low reflection absorbers for absorbing or minimising reflection of radio waves

Country Status (4)

Country Link
BE (1) BE540736A (en)
DE (1) DE955612C (en)
FR (2) FR1091571A (en)
GB (2) GB776158A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152328A (en) * 1957-11-21 1964-10-06 Mcmillan Corp Of North Carolin Microwave radiation absorber comprising spaced parallel resistance discs
US3234549A (en) * 1961-03-20 1966-02-08 Mcmillan Corp Of North Carolin Absorber for radio waves
US3440655A (en) * 1966-02-26 1969-04-22 Electro Gmbh & Co Space absorbers for electromagnetic waves
US4034375A (en) * 1975-05-23 1977-07-05 Barracudaverken Aktiebolag Laminated camouflage material
FR2631452A1 (en) * 1988-05-16 1989-11-17 Aerospatiale Polyvalent electromagnetic anechoic chamber - has several operating modes, with six walls carpeted with absorbent elements, turnstile electromagnetic source
EP0369174A1 (en) * 1988-11-15 1990-05-23 G + H Montage Gmbh Broad-band absorber for electromagnetic waves
EP0439337A2 (en) * 1990-01-25 1991-07-31 Yoshiyuki Naito Broad-band wave absorber
AT395127B (en) * 1989-08-24 1992-09-25 Gruenzweig & Hartmann METHOD FOR PRODUCING A SURFACE ELEMENT FOR ABSORPING ELECTROMAGNETIC SHAFTS
US5276448A (en) * 1990-01-25 1994-01-04 Naito Yoshuki Broad-band wave absorber
WO1995000983A1 (en) * 1993-06-25 1995-01-05 Nimtz Guenter Arrangement for absorbing electromagnetic waves and process for producing the same
US5394150A (en) * 1991-09-19 1995-02-28 Naito; Yoshiyuki Broad-band radio wave absorber
WO1996000992A1 (en) * 1994-06-28 1996-01-11 Gec-Marconi Limited Energy absorbing arrangements
US5617096A (en) * 1994-07-25 1997-04-01 Takahashi; Michiharu Broad-band radio wave absorber
US5812080A (en) * 1995-12-27 1998-09-22 Takahashi; Michiharu Broad-band radio wave absorber
DE102008051028A1 (en) * 2008-10-13 2010-04-15 Nimtz, Günter, Prof. Dr. Arrangement for absorbing electromagnetic waves and absorber plate
EP2293661A4 (en) * 2008-04-15 2015-06-10 Riken Kk Composite radio wave absorber

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029433B (en) * 1954-06-11 1958-05-08 Siemens Ag Low-reflection damping arrangement for electromagnetic or acoustic waves
DE1021439B (en) * 1954-06-11 1957-12-27 Siemens Ag Arrangement for reducing or preventing the reflection of electromagnetic waves
DE1056681B (en) * 1954-08-30 1959-05-06 Siemens Ag Low reflection damping arrangement for electromagnetic and acoustic waves
DE1268231B (en) * 1963-03-12 1968-05-16 Siemens Ag Low reflection damping arrangement for electromagnetic waves
DE1227090B (en) * 1964-06-01 1966-10-20 Klaus Krasselt Arrangement for making objects undetectable for radar beams
DE1255747B (en) * 1965-07-15 1967-12-07 Siemens Ag Low reflection damping arrangement for electromagnetic waves
DE1254720B (en) * 1965-07-19 1967-11-23 Siemens Ag Low-reflection, broadband damping arrangement for electromagnetic waves
DE1254719B (en) * 1965-07-19 1967-11-23 Siemens Ag Low-reflection, broadband damping arrangement for electromagnetic waves
DE1253780B (en) * 1965-07-29 1967-11-09 Siemens Ag Low-reflection, broadband damping arrangement for electromagnetic waves
CN113232375B (en) * 2021-03-31 2022-06-14 成都飞机工业（集团）有限责任公司 Preparation method of honeycomb sandwich composite material

Family Cites Families (1)

* 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

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152328A (en) * 1957-11-21 1964-10-06 Mcmillan Corp Of North Carolin Microwave radiation absorber comprising spaced parallel resistance discs
US3234549A (en) * 1961-03-20 1966-02-08 Mcmillan Corp Of North Carolin Absorber for radio waves
US3440655A (en) * 1966-02-26 1969-04-22 Electro Gmbh & Co Space absorbers for electromagnetic waves
US4034375A (en) * 1975-05-23 1977-07-05 Barracudaverken Aktiebolag Laminated camouflage material
FR2631452A1 (en) * 1988-05-16 1989-11-17 Aerospatiale Polyvalent electromagnetic anechoic chamber - has several operating modes, with six walls carpeted with absorbent elements, turnstile electromagnetic source
EP0369174A1 (en) * 1988-11-15 1990-05-23 G + H Montage Gmbh Broad-band absorber for electromagnetic waves
AT395127B (en) * 1989-08-24 1992-09-25 Gruenzweig & Hartmann METHOD FOR PRODUCING A SURFACE ELEMENT FOR ABSORPING ELECTROMAGNETIC SHAFTS
EP0439337A3 (en) * 1990-01-25 1991-11-06 Yoshiyuki Naito Broad-band wave absorber
EP0439337A2 (en) * 1990-01-25 1991-07-31 Yoshiyuki Naito Broad-band wave absorber
US5276448A (en) * 1990-01-25 1994-01-04 Naito Yoshuki Broad-band wave absorber
US5394150A (en) * 1991-09-19 1995-02-28 Naito; Yoshiyuki Broad-band radio wave absorber
WO1995000983A1 (en) * 1993-06-25 1995-01-05 Nimtz Guenter Arrangement for absorbing electromagnetic waves and process for producing the same
WO1996000992A1 (en) * 1994-06-28 1996-01-11 Gec-Marconi Limited Energy absorbing arrangements
GB2293273A (en) * 1994-06-28 1996-03-20 Marconi Gec Ltd Energy absorbing arrangements
US5617096A (en) * 1994-07-25 1997-04-01 Takahashi; Michiharu Broad-band radio wave absorber
US5812080A (en) * 1995-12-27 1998-09-22 Takahashi; Michiharu Broad-band radio wave absorber
EP2293661A4 (en) * 2008-04-15 2015-06-10 Riken Kk Composite radio wave absorber
DE102008051028A1 (en) * 2008-10-13 2010-04-15 Nimtz, Günter, Prof. Dr. Arrangement for absorbing electromagnetic waves and absorber plate

Also Published As

Publication number Publication date
FR69031E (en) 1958-08-27
FR1091571A (en) 1955-04-13
DE955612C (en) 1957-01-03
BE540736A (en)
GB797610A (en) 1958-07-02

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