GB776158A - Improvements in or relating to absorbers for radio waves - Google Patents
Improvements in or relating to absorbers for radio wavesInfo
- 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
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)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1021439B (en) * | 1954-06-11 | 1957-12-27 | Siemens Ag | Arrangement for reducing or preventing the reflection of electromagnetic waves |
DE1029433B (en) * | 1954-06-11 | 1958-05-08 | Siemens Ag | Low-reflection damping arrangement for electromagnetic or acoustic 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 |
DE1254719B (en) * | 1965-07-19 | 1967-11-23 | Siemens Ag | Low-reflection, broadband damping arrangement for electromagnetic waves |
DE1254720B (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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2464006A (en) * | 1944-04-28 | 1949-03-08 | Philco Corp | Radio wave absorption device |
-
0
- BE BE540736D patent/BE540736A/xx unknown
-
1953
- 1953-03-29 DE DEG11389A patent/DE955612C/en not_active Expired
-
1954
- 1954-01-21 FR FR1091571D patent/FR1091571A/en not_active Expired
- 1954-03-08 GB GB6735/54A patent/GB776158A/en not_active Expired
-
1955
- 1955-08-26 FR FR69031D patent/FR69031E/en not_active Expired
- 1955-10-06 GB GB28558/55A patent/GB797610A/en not_active Expired
Cited By (18)
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 |
---|---|
GB797610A (en) | 1958-07-02 |
DE955612C (en) | 1957-01-03 |
FR1091571A (en) | 1955-04-13 |
BE540736A (en) | |
FR69031E (en) | 1958-08-27 |
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