EP0096847A2 - Dispositif de dispersion de dipoles - Google Patents

Dispositif de dispersion de dipoles Download PDF

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Publication number
EP0096847A2
EP0096847A2 EP83105651A EP83105651A EP0096847A2 EP 0096847 A2 EP0096847 A2 EP 0096847A2 EP 83105651 A EP83105651 A EP 83105651A EP 83105651 A EP83105651 A EP 83105651A EP 0096847 A2 EP0096847 A2 EP 0096847A2
Authority
EP
European Patent Office
Prior art keywords
dipoles
sleeve
sections
turns
cloud
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.)
Granted
Application number
EP83105651A
Other languages
German (de)
English (en)
Other versions
EP0096847A3 (en
EP0096847B1 (fr
Inventor
Gmbh Co Diehl
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0096847A2 publication Critical patent/EP0096847A2/fr
Publication of EP0096847A3 publication Critical patent/EP0096847A3/de
Application granted granted Critical
Publication of EP0096847B1 publication Critical patent/EP0096847B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/70—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies for dispensing radar chaff or infrared material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/145—Reflecting surfaces; Equivalent structures comprising a plurality of reflecting particles, e.g. radar chaff

Definitions

  • the invention relates to a dipole arrangement in a sleeve with portions of ejectable dipoles arranged one behind the other in the sleeve.
  • dipole sections of different lengths are arranged in sections in a sleeve.
  • the dipole sections can be ejected from the sleeve via a piston, the piston being drivable by a gas pressure-generating charge.
  • GB-PS 834 596 discloses sections of dipoles bundled by loose, thin paper, which are arranged in a sleeve made of reinforced paper. In addition, it is known to insert a section of the paper directly enveloping the dipoles as a tail in the mass of the dipoles, for example in the radial direction.
  • the object of the invention is to provide a structurally simple, inexpensive dipole arrangement for an ejection sleeve, which can be ejected from the sleeve in a short time and quickly produces a large-area and homogeneous cloud after ejection.
  • the metal foil slides very well on the highly polished inner surface of the sleeve, so that the energy required to eject the sections from the sleeve can be measured relatively small.
  • the ejection range of the sections is increased by approximately 30%. This is advantageous for the diameter of the whey when ejecting from the aircraft and for the distance and height of the cloud above the ejection location for earth-based ejection, since the sections cover a relatively large distance at high average speed during the detachment of the dipoles.
  • the dipoles pretensioned in the sections act as a drive spring for the metal foil surrounding the section, so that a time-delayed release of the dipoles is achieved depending on the number of turns of the metal foil.
  • the section with a low number of turns gives off the dipoles earlier than the section with a higher number of turns.
  • a radar-relevant cloud with a diameter of approx. 4 m is reached when there is no wind, at a wind strength of 3 m / S a cloud is reached at a height of 4 m with a diameter of 3 m and a length of approx. 40 m.
  • a radar-relevant cloud is reached which is approximately 50% larger than the side view area of an aircraft, such as the F-104 G Starfighter.
  • the diameter of the cloud is also larger than the largest cross-section of a combat aircraft. This provides an all-round defense against ground-based and air-based defense devices with homing radar.
  • the section lying at the mouth of the sleeve initiates an envelope with a number of turns of 1.2 to 0.75 after the discharge immediately afterwards the cloud formation.
  • the deflection time for the opposing radar is therefore very short, since the cloud surface detected by the radar as a target arises much earlier than according to the prior art.
  • a cloud formed to 70% is sufficient to deflect the radar from the aircraft.
  • the section arranged at the mouth of the sleeve can be without a cover in order to increase the formation of the cloud with respect to its radar-relevant intensities.
  • Claim 4 covers in a simple manner a frequency spectrum which is evenly present per unit area of the finished cloud.
  • the decisive factor here is that the cutting length is selected such that the dipoles assigned to the highest frequency are approximately one square meter cover the finished whey in a radar-relevant manner.
  • Those dipoles of a section, which in themselves are not enough in number to cover one square meter of the finished cloud, are supplemented by corresponding dipoles of other sections in order to meet the aforementioned condition.
  • a good distribution of the dipoles both in the longitudinal direction of the cloud and in the transverse direction is achieved in that the dipoles of different lengths form the structure in the manner of a network by swirling.
  • the one-piece metal foil according to claim 7 ensures that after ejection from the sleeve - due to the radially expanding dipoles - the only plastically deformable metal foil only needs to increase its winding radius until the number of turns ⁇ 1 and a sufficiently large distance (window ) is reached between the two ends of the film. Because of this window, dipoles are detached from the section (package) by the air flow and, on the other hand, the film itself is removed from the package. As a result, the package can unfold unhindered into a partial cloud due to the clamping force still present in the package and due to the air flowing out. The number of partial clouds of a minimum of 10 pieces and a maximum of approximately 25 pieces then results in the actual cloud by overlapping.
  • a radar grid of an opposing radar with the stop lines 1 to 4 is specified.
  • the grid size 5 is approx. 21 m.
  • an aircraft 6 which has emitted dipoles 10 to 12 at two intervals in accordance with the arrow 7, thereby forming the radar-relevant clouds 8, 9 lying between the rest lines 2 to 4. Comparing the areas of aircraft 6 and cloud 8 or 9, cloud 8 or 9 is approximately 30% larger than the area of the aircraft shown.
  • the stop lines 1 to 4 correspond to a conventional radar with a pulse width of 200 us at a given target distance.
  • the speed of the aircraft is 300 m / s.
  • the output sequence of dipole arrangements is 100 m / s.
  • a dipole arrangement 13 consists of a sleeve 14 with a square inner cross section, dipole sections 15 to 24, a piston 25 and a cover 26.
  • the inner surfaces 27 of the sleeve 14 are highly polished.
  • the individual dipoles 10 to 12 usually consist of aluminum-coated glass threads. These glass threads are stranded in the longitudinal direction of the sleeve 14, the length of the dipoles 10 to 12 corresponds to the length of the individual sections 15 to 24.
  • a curve 40 determined by empirical values allows the number of turns of the foils 31 to 39 to be determined for each individual dipole section 16 to 24.
  • the section 15 at the mouth 45 of the sleeve 14 has no casing.
  • the dipoles 10 are arranged "naked" in the sleeve 14 as a package section 15.
  • the film 36 is from the FIG. 2 detached and drawn for the better illustration with a distance between the turns. In reality, the turns of the film 36 are close together.
  • the contact pressure between the turns of the film is achieved by the insertion of the individual dipole sections 16 to 24 into the sleeve 14. This is because the sections 16 to 24 have larger dimensions in the circumferential direction than the inner cross section of the sleeve 14 before insertion into the sleeve 14.
  • the sections 16 to 24 which have already been wrapped are therefore inserted into the sleeve by means of a suitable device pressed into the sleeve 14.
  • Section 15 is pressed as the last part of sections 16 to 24 into the sleeve, so that their dipoles 10 are also biased centripedally.
  • the compressed dipoles 10 act as a spring element.
  • This spring element acts in the radial direction in that the dipole assembly expands radially. As a result, they act on the metal foil 31 and reduce the number of turns until the metal foil 31 releases the dipoles on the circumference. Only then does the swirling of the dipoles 10 by the attacking air flow begin. The wound metal foil 31 is also removed from the dipoles.
  • dipole sections 46 to 52 of a dipole arrangement 44 are configured as packets of the same length.
  • the dipole sections 47L49, 51 - with dipoles lying in the longitudinal direction of the sleeve 14 - are cut transversely to the longitudinal axis of the sleeve 14 (section line 54).
  • the cut (depth of cut 53) through the metal foil and the dipoles is carried out in such a way that the dipoles 12 (each section 47, 49, 51) with the shortest length (subset 65) cover about one square meter of cloud area in terms of radar with regard to their number.
  • the depth of cut is designated 53 and the cut line 54.
  • the cut is carried out by means of a suitable device before the sections 46 to 52 are filled into the sleeve 14 through the enveloping metal foil and the relevant dipoles.
  • the uncut dipoles 10 then result in the subset 67.
  • the curve 70 indicated in the upper part of FIG. 4 is defined analogously to FIG. 2.2.
  • the curve 70 indicates the number of turns of the metal foil in relation to the respective sections 46 to 52.
  • each section has dipoles 10 to 12 of different lengths
  • the metal foil is pulled up to a number of turns ⁇ 1 after ejection from sleeve 14 due to the radial pressure of dipoles 10 to 12, to the extent that until the inflowing air has loosened the film and loosens and distributes the dipoles.
  • the dipoles 10 to 12 of all sections lie in the axial direction of the sleeve 14.
  • the dipoles of the sections lie transversely to Arrange longitudinal direction of the sleeve 14.
  • a circular cross-section can also be used instead of the square inner cross-section of the sleeve 14.
  • a dipole section 70 has dipoles 10 and a metal foil 71.
  • the film 71 is provided with an integral air brake 72.
  • the air brake 72 consists of two braking surfaces 73, 74. The braking surfaces are determined by edges 75, 76 of the film 71.
  • the air brake 72 is folded in the sleeve 14 accordingly, so that it supports the unwinding of the film 71 from the section 70 after ejection by the air flowing in the direction of arrow 77.
  • the main idea of this solution is that a very effective air brake is created by the twice bent end of the film 71.
  • the measure described above can also be used in the incised sections 47, 49, 51.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Toys (AREA)
  • Aerials With Secondary Devices (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Tires In General (AREA)
EP83105651A 1982-06-16 1983-06-09 Dispositif de dispersion de dipoles Expired EP0096847B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3222584 1982-06-16
DE19823222584 DE3222584A1 (de) 1982-06-16 1982-06-16 Dipol-anordnung in einer huelse

Publications (3)

Publication Number Publication Date
EP0096847A2 true EP0096847A2 (fr) 1983-12-28
EP0096847A3 EP0096847A3 (en) 1986-03-12
EP0096847B1 EP0096847B1 (fr) 1989-02-08

Family

ID=6166176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105651A Expired EP0096847B1 (fr) 1982-06-16 1983-06-09 Dispositif de dispersion de dipoles

Country Status (7)

Country Link
US (1) US4630055A (fr)
EP (1) EP0096847B1 (fr)
DE (2) DE3222584A1 (fr)
DK (1) DK278183A (fr)
GB (1) GB2124740B (fr)
IL (1) IL69005A (fr)
NO (1) NO162138C (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2190749A1 (es) * 2001-11-30 2003-08-01 Fractus Sa Dispersores "chaff" multinivel y/o "space-filling", contra radar
US7123208B2 (en) 1999-09-20 2006-10-17 Fractus, S.A. Multilevel antennae
US7148850B2 (en) 2000-01-19 2006-12-12 Fractus, S.A. Space-filling miniature antennas
FR2924798A1 (fr) * 1997-10-09 2009-06-12 Lacroix Soc E Perfectionnements aux conteneurs disperseurs de paillettes formant reflecteur electromagnetique
US8738103B2 (en) 2006-07-18 2014-05-27 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US9755314B2 (en) 2001-10-16 2017-09-05 Fractus S.A. Loaded antenna
US9905940B2 (en) 1999-10-26 2018-02-27 Fractus, S.A. Interlaced multiband antenna arrays

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004501543A (ja) 2000-04-19 2004-01-15 アドバンスド　オートモーティブ　アンテナズ　ソシエダット　デ　レスポンサビリダット　リミタダ 改良された自動車用マルチレベルアンテナ
US7511675B2 (en) 2000-10-26 2009-03-31 Advanced Automotive Antennas, S.L. Antenna system for a motor vehicle
RU2202094C2 (ru) * 2000-12-25 2003-04-10 Войсковая часть 61469 МО РФ Способ защиты военных и промышленных объектов от высокоточных средств поражения
KR20030080217A (ko) 2001-02-07 2003-10-11 프레이투스, 에스.에이. 소형 광대역 고리형 마이크로스트립 패치 안테나
DE60128837T2 (de) 2001-04-16 2008-02-28 Fractus, S.A. Doppelbandige dualpolarisierte gruppenantenne
CN100382385C (zh) 2001-10-16 2008-04-16 弗拉克托斯股份有限公司 加载天线
EP1436858A1 (fr) 2001-10-16 2004-07-14 Fractus, S.A. Antenne multibande
WO2003034545A1 (fr) 2001-10-16 2003-04-24 Fractus, S.A. Antenne a plaque microruban multifrequence avec elements couples non alimentes
FR2991666B1 (fr) * 2012-06-07 2015-02-27 Mbda France Procede, dispositif et systeme de leurrage pour la protection d'un aeronef

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023703A (en) * 1955-08-24 1962-03-06 Beatty John William Chaff dispensing device
GB834596A (en) * 1957-01-14 1960-05-11 Chemring Ltd Improvements in and relating to radar responsive means
US3500409A (en) * 1963-02-05 1970-03-10 Us Air Force Means for packaging and dispensing chaff
GB1598423A (en) * 1967-11-03 1981-09-23 Gen Dynamics Corp Decoy round
GB1302872A (fr) * 1969-06-12 1973-01-10 Schermuly Ltd
US3765336A (en) * 1972-01-28 1973-10-16 Us Navy Chaff bullet
GB1434034A (en) * 1972-07-11 1976-04-28 Bender Ltd F Method and equipment for forming a single cloud of radar reflecting chaff within the atmosphere
FR2427573B1 (fr) * 1978-05-30 1985-12-13 Lacroix Tous Artifices E Dispositif d'alarme a actionnement pyrotechnique et declenchement manuel, en particulier par leurres electromagnetiques
US4195571A (en) * 1979-04-02 1980-04-01 The United States Of America As Represented By The Secretary Of The Army Modular wheel dispenser
DE3015719C2 (de) * 1980-04-24 1984-03-01 Diehl GmbH & Co, 8500 Nürnberg Düppel-Patrone zum Flugzeug-Selbstschutz
JPS57172199A (en) * 1980-12-23 1982-10-22 Warotsupu Ind Ltd Rocket for material for disturbing radar searching

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2924798A1 (fr) * 1997-10-09 2009-06-12 Lacroix Soc E Perfectionnements aux conteneurs disperseurs de paillettes formant reflecteur electromagnetique
US10056682B2 (en) 1999-09-20 2018-08-21 Fractus, S.A. Multilevel antennae
US7123208B2 (en) 1999-09-20 2006-10-17 Fractus, S.A. Multilevel antennae
US9761934B2 (en) 1999-09-20 2017-09-12 Fractus, S.A. Multilevel antennae
US7394432B2 (en) 1999-09-20 2008-07-01 Fractus, S.A. Multilevel antenna
US7397431B2 (en) 1999-09-20 2008-07-08 Fractus, S.A. Multilevel antennae
US7505007B2 (en) 1999-09-20 2009-03-17 Fractus, S.A. Multi-level antennae
US9905940B2 (en) 1999-10-26 2018-02-27 Fractus, S.A. Interlaced multiband antenna arrays
US10355346B2 (en) 2000-01-19 2019-07-16 Fractus, S.A. Space-filling miniature antennas
US7202822B2 (en) 2000-01-19 2007-04-10 Fractus, S.A. Space-filling miniature antennas
US7148850B2 (en) 2000-01-19 2006-12-12 Fractus, S.A. Space-filling miniature antennas
US9755314B2 (en) 2001-10-16 2017-09-05 Fractus S.A. Loaded antenna
US6876320B2 (en) 2001-11-30 2005-04-05 Fractus, S.A. Anti-radar space-filling and/or multilevel chaff dispersers
ES2190749A1 (es) * 2001-11-30 2003-08-01 Fractus Sa Dispersores "chaff" multinivel y/o "space-filling", contra radar
US8738103B2 (en) 2006-07-18 2014-05-27 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US9899727B2 (en) 2006-07-18 2018-02-20 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US10644380B2 (en) 2006-07-18 2020-05-05 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11031677B2 (en) 2006-07-18 2021-06-08 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11349200B2 (en) 2006-07-18 2022-05-31 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11735810B2 (en) 2006-07-18 2023-08-22 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US12095149B2 (en) 2006-07-18 2024-09-17 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices

Also Published As

Publication number Publication date
EP0096847A3 (en) 1986-03-12
DK278183D0 (da) 1983-06-16
GB2124740B (en) 1985-12-11
DK278183A (da) 1983-12-17
NO831897L (no) 1983-12-19
NO162138B (no) 1989-07-31
EP0096847B1 (fr) 1989-02-08
DE3379188D1 (en) 1989-03-16
GB2124740A (en) 1984-02-22
DE3222584A1 (de) 1983-12-22
IL69005A (en) 1987-03-31
NO162138C (no) 1989-11-08
US4630055A (en) 1986-12-16

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