GB969142A - Improvements in or relating to electromagnetic wave absorption systems - Google Patents
Improvements in or relating to electromagnetic wave absorption systemsInfo
- Publication number
- GB969142A GB969142A GB4875962A GB4875962A GB969142A GB 969142 A GB969142 A GB 969142A GB 4875962 A GB4875962 A GB 4875962A GB 4875962 A GB4875962 A GB 4875962A GB 969142 A GB969142 A GB 969142A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blocks
- coated
- side faces
- dec
- built
- 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
- 238000010521 absorption reaction Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 230000005670 electromagnetic radiation Effects 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 238000002310 reflectometry Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
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
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
969,142. Absorbing radio waves. SIEMENS & HALSKE A.G. Dec. 28, 1962 [Dec. 28, 1961; Sept. 13, 1962], No. 48759/62. Heading H4A. A wall which will absorb electromagnetic radiation is built from a plurality of solid or foamed plastic blocks 1, 2 some of which (2) have two or more of their side faces coated with a layer of a material which has a high resistivity yet is electrically conducting, these blocks 2 being so disposed within the wall that the coated faces form a lattice network. As shown, the blocks 2 have all four side faces coated and constitute each alternate block. Alternatively, all the blocks may have two adjacent or two opposite side faces (Fig. 8, not shown) so coated. To increase the absorption effect two or more walls may be arranged one behind the other, the walls being built from blocks of different sizes. The same effect is obtained if the dielectric constant of the block material increases with distance from the incident radiation and if the magnetic permeability of the blocks is greater than that of air. If low acoustic reflectivity is also required, the blocks can incorporate sound-absorbing substances. Specification 969,141 is referred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1961S0077336 DE1243740B (en) | 1961-12-28 | 1961-12-28 | Low reflection damping arrangement for electromagnetic waves |
| DE1962S0081447 DE1244255B (en) | 1961-12-28 | 1962-09-13 | Low reflection electromagnetic wave damper assembly and method of making such assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB969142A true GB969142A (en) | 1964-09-09 |
Family
ID=25996716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4875962A Expired GB969142A (en) | 1961-12-28 | 1962-12-28 | Improvements in or relating to electromagnetic wave absorption systems |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH417706A (en) |
| DE (2) | DE1243740B (en) |
| GB (1) | GB969142A (en) |
| NL (1) | NL286821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5095311A (en) * | 1987-11-28 | 1992-03-10 | Toppan Printing Co., Ltd. | Electromagnetic wave absorbing element |
| GB2576351A (en) * | 2018-08-16 | 2020-02-19 | Bae Systems Plc | A structure |
Family Cites Families (2)
| 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 |
| DE1120529B (en) * | 1958-06-14 | 1961-12-28 | Edward Bellamy Mcmillan | Microwave absorbers |
-
0
- NL NL286821D patent/NL286821A/xx unknown
-
1961
- 1961-12-28 DE DE1961S0077336 patent/DE1243740B/en active Pending
-
1962
- 1962-09-13 DE DE1962S0081447 patent/DE1244255B/en active Pending
- 1962-12-04 CH CH1424962A patent/CH417706A/en unknown
- 1962-12-28 GB GB4875962A patent/GB969142A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5095311A (en) * | 1987-11-28 | 1992-03-10 | Toppan Printing Co., Ltd. | Electromagnetic wave absorbing element |
| GB2576351A (en) * | 2018-08-16 | 2020-02-19 | Bae Systems Plc | A structure |
| GB2576351B (en) * | 2018-08-16 | 2022-11-23 | Bae Systems Plc | A structure |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1243740B (en) | 1967-07-06 |
| CH417706A (en) | 1966-07-31 |
| NL286821A (en) | |
| DE1244255B (en) | 1967-07-13 |
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