EP0298306A2 - Matériau de camouflage au radar - Google Patents
Matériau de camouflage au radar Download PDFInfo
- Publication number
- EP0298306A2 EP0298306A2 EP88109979A EP88109979A EP0298306A2 EP 0298306 A2 EP0298306 A2 EP 0298306A2 EP 88109979 A EP88109979 A EP 88109979A EP 88109979 A EP88109979 A EP 88109979A EP 0298306 A2 EP0298306 A2 EP 0298306A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- radar
- camouflage material
- antenna elements
- antennas
- radar camouflage
- 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- Withdrawn
Links
Images
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
Definitions
- the invention relates to a radar camouflage material according to the preamble of claim 1.
- Radar camouflage materials are intended to be a target object, e.g. B. an aircraft, protect against detection by an opposing radar or at least complicate the detection.
- lossy dielectrics of various designs are known and used.
- the main problem here is that the layers of such dielectrics required for effective camouflage are too thick to be suitable for aircraft camouflage.
- a fiber composite material is known from EP O 121 655 A2, in which, for. B. soot or iron powder is stored such that absorption of the radar source is made possible. Since this material can only be used where structural assessments of the aircraft made of fiber composite material are planned in the production, this material does not offer an actual solution to the camouflage problem of metal parts.
- a method is known from EP 0 104 536 A2 in which an antenna is constructed in the so-called microstrip technique.
- This antenna consists of several metal foil spots that are applied to a dielectric and form an array there.
- the electromagnetic radiation falling on the array is partially absorbed.
- the array camouflages the covered area.
- the present invention has for its object to provide a radar camouflage material that is thin and easy to manufacture.
- Minimally scattering antennas and their scattering properties are known per se and z. B. IEEE Trans. AP, Vol. 13 (1965), pages 671 to 675 and IEEE Trans. AP, Vol. 27 (1979), pages 640 to 646.
- dipole antennas and ring antennas meet the conditions for minimally scattering antennas.
- These antenna elements can be easily, for. B. are produced as etched conductor structures on a thin dielectric layer (film). Since no lossy storage is required, the manufacturing and processing is much easier.
- the antenna elements are each purely reactive, z. B. over line sections that are either open (idle) or completed with a short circuit.
- the opposite side of the dielectric is preferably completely metallized.
- the power components P a and P s are of the same size, for all other antennas the scattering power P s is greater than the received power P a .
- the length l of the line L is variable (using a line stretcher). If the load Z is purely reactive, that is to say an open circuit or a short circuit, the total power P a is reflected after passing through the line to the antenna. By means of the line stretcher, the reflected wave can be returned to the antenna element in such a phase that the backscattering of the incident wave is minimal.
- the antenna elements are preferably designed as ring antennas. If you combine several such ring antennas into an array, a camouflage surface is created, whereby the cable lengths of the emitters are tuned to a certain frequency.
- the line pieces are preferably applied insulated against the metallization on the back of the dielectric carrier.
- the antenna elements are designed as closed rings, which corresponds to a reduction in the line length to zero.
- the camouflage property can then be set at a desired frequency via the dimensioning of the rings.
Landscapes
- Radar Systems Or Details Thereof (AREA)
- Details Of Aerials (AREA)
- Aerials With Secondary Devices (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873722793 DE3722793A1 (de) | 1987-07-10 | 1987-07-10 | Radartarnmaterial |
DE3722793 | 1987-07-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0298306A2 true EP0298306A2 (fr) | 1989-01-11 |
EP0298306A3 EP0298306A3 (fr) | 1991-01-09 |
Family
ID=6331283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880109979 Withdrawn EP0298306A3 (fr) | 1987-07-10 | 1988-06-23 | Matériau de camouflage au radar |
Country Status (8)
Country | Link |
---|---|
US (1) | US5014070A (fr) |
EP (1) | EP0298306A3 (fr) |
JP (1) | JPS6481400A (fr) |
DE (1) | DE3722793A1 (fr) |
DK (1) | DK377188A (fr) |
FI (1) | FI883272A (fr) |
NO (1) | NO883060L (fr) |
PT (1) | PT87961A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4009003A1 (de) * | 1990-03-21 | 1991-09-26 | Behre Dieter | Strahlenschutzvorrichtung zur verminderung von in einen lebensraum eindringender strahlung |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5543809A (en) * | 1992-03-09 | 1996-08-06 | Martin Marietta Corp. | Reflectarray antenna for communication satellite frequency re-use applications |
US5327148A (en) * | 1993-02-17 | 1994-07-05 | Northeastern University | Ferrite microstrip antenna |
US5515059A (en) * | 1994-01-31 | 1996-05-07 | Northeastern University | Antenna array having two dimensional beam steering |
US5675345A (en) * | 1995-11-21 | 1997-10-07 | Raytheon Company | Compact antenna with folded substrate |
US6359588B1 (en) * | 1997-07-11 | 2002-03-19 | Nortel Networks Limited | Patch antenna |
GB2329071A (en) * | 1997-09-05 | 1999-03-10 | David Graham Cass | Radio frequency absorber system |
GB9819504D0 (en) * | 1998-09-07 | 1998-10-28 | Ardavan Houshang | Apparatus for generating focused electromagnetic radiation |
JP2000114865A (ja) * | 1998-10-08 | 2000-04-21 | Matsushita Electric Ind Co Ltd | 移動無線機 |
EP1556923B1 (fr) * | 2002-10-24 | 2013-05-15 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Antenne dynamique |
US7053846B2 (en) * | 2003-10-27 | 2006-05-30 | Harris Corporation | Spherical ring antenna |
US7999720B2 (en) * | 2006-02-13 | 2011-08-16 | The Invention Science Fund I, Llc | Camouflage positional elements |
WO2008023800A1 (fr) * | 2006-08-24 | 2008-02-28 | Hitachi Kokusai Electric Inc. | Dispositif d'antenne |
TW200830632A (en) * | 2007-01-05 | 2008-07-16 | Advanced Connection Tech Inc | Circular polarized antenna |
GB0811493D0 (en) * | 2008-06-21 | 2008-07-30 | Qinetiq Ltd | Radio Frequency absorption |
GB201012923D0 (en) * | 2010-07-30 | 2010-09-15 | Sarantel Ltd | An antenna |
US9225069B2 (en) | 2011-10-18 | 2015-12-29 | California Institute Of Technology | Efficient active multi-drive radiator |
US9921255B2 (en) | 2012-02-13 | 2018-03-20 | California Institute Of Technology | Sensing radiation metrics through mode-pickup sensors |
US9686070B2 (en) | 2012-02-17 | 2017-06-20 | California Institute Of Technology | Dynamic polarization modulation and control |
WO2014018927A1 (fr) * | 2012-07-26 | 2014-01-30 | California Institute Of Technology | Antenne active à commande optique |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0104536A2 (fr) * | 1982-09-24 | 1984-04-04 | Ball Corporation | Réseau réflecteur microbande pour communications par satellite et pour l'augmentation ou la réduction de la surface radar utile |
DE8323528U1 (de) * | 1983-08-16 | 1984-05-03 | Eckert, Eberhard, 5300 Bonn | Antenne |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7314269A (nl) * | 1973-10-17 | 1975-04-21 | Philips Nv | Microgolfinrichting voorzien van een 1/2 lambda resonator. |
US4123759A (en) * | 1977-03-21 | 1978-10-31 | Microwave Associates, Inc. | Phased array antenna |
US4364050A (en) * | 1981-02-09 | 1982-12-14 | Hazeltine Corporation | Microstrip antenna |
DE3307066A1 (de) * | 1983-03-01 | 1984-09-13 | Dornier Gmbh, 7990 Friedrichshafen | Mehrschichtiger faserverbundwerkstoff |
JPS59178002A (ja) * | 1983-03-29 | 1984-10-09 | Radio Res Lab | 円偏波アンテナ |
US4554549A (en) * | 1983-09-19 | 1985-11-19 | Raytheon Company | Microstrip antenna with circular ring |
US4697189A (en) * | 1985-04-26 | 1987-09-29 | University Of Queensland | Microstrip antenna |
US4823145A (en) * | 1986-09-12 | 1989-04-18 | University Patents, Inc. | Curved microstrip antennas |
-
1987
- 1987-07-10 DE DE19873722793 patent/DE3722793A1/de not_active Withdrawn
-
1988
- 1988-06-23 EP EP19880109979 patent/EP0298306A3/fr not_active Withdrawn
- 1988-07-07 DK DK377188A patent/DK377188A/da not_active Application Discontinuation
- 1988-07-08 NO NO88883060A patent/NO883060L/no unknown
- 1988-07-08 US US07/216,578 patent/US5014070A/en not_active Expired - Fee Related
- 1988-07-08 PT PT87961A patent/PT87961A/pt not_active Application Discontinuation
- 1988-07-08 FI FI883272A patent/FI883272A/fi not_active Application Discontinuation
- 1988-07-11 JP JP63171069A patent/JPS6481400A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0104536A2 (fr) * | 1982-09-24 | 1984-04-04 | Ball Corporation | Réseau réflecteur microbande pour communications par satellite et pour l'augmentation ou la réduction de la surface radar utile |
DE8323528U1 (de) * | 1983-08-16 | 1984-05-03 | Eckert, Eberhard, 5300 Bonn | Antenne |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4009003A1 (de) * | 1990-03-21 | 1991-09-26 | Behre Dieter | Strahlenschutzvorrichtung zur verminderung von in einen lebensraum eindringender strahlung |
Also Published As
Publication number | Publication date |
---|---|
NO883060L (no) | 1989-01-11 |
FI883272A (fi) | 1989-01-11 |
NO883060D0 (no) | 1988-07-08 |
DE3722793A1 (de) | 1989-01-19 |
US5014070A (en) | 1991-05-07 |
PT87961A (pt) | 1989-06-30 |
FI883272A0 (fi) | 1988-07-08 |
DK377188D0 (da) | 1988-07-07 |
JPS6481400A (en) | 1989-03-27 |
EP0298306A3 (fr) | 1991-01-09 |
DK377188A (da) | 1989-01-11 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: TELEFUNKEN SYSTEMTECHNIK GMBH |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
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17P | Request for examination filed |
Effective date: 19910619 |
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RBV | Designated contracting states (corrected) |
Designated state(s): AT BE CH DE ES FR GB GR IT LI SE |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB IT |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: TELEFUNKEN SYSTEMTECHNIK AG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DEUTSCHE AEROSPACE AKTIENGESELLSCHAFT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19940104 |