EP3533108A1 - Radomwandung für kommunikationsanwendungen - Google Patents
Radomwandung für kommunikationsanwendungenInfo
- Publication number
- EP3533108A1 EP3533108A1 EP17793900.6A EP17793900A EP3533108A1 EP 3533108 A1 EP3533108 A1 EP 3533108A1 EP 17793900 A EP17793900 A EP 17793900A EP 3533108 A1 EP3533108 A1 EP 3533108A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radomwandung
- layers
- core
- radome
- core layers
- 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
Links
- 238000004891 communication Methods 0.000 title claims abstract description 12
- 239000010410 layer Substances 0.000 claims abstract description 71
- 239000012792 core layer Substances 0.000 claims abstract description 45
- 239000003989 dielectric material Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000006261 foam material Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000002655 kraft paper Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 230000005670 electromagnetic radiation Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
Definitions
- the invention relates to a Radomwandung for communication, in particular data transmission, in the frequency band of 17 to 31 GHz, in particular for use on commercial aircraft, and a radome with corresponding Radomwandung.
- radomes In order to protect antennas for emitting and / or receiving electromagnetic radiation from external mechanical or chemical influences, such as, for example, wind and rain, protective covers for antennas known as "radomes" are known, in addition to the structural strength required for protecting the antennas is essential for radomes that they have a suitable transmission behavior, that is sufficiently permeable to the electromagnetic radiation in the for the antenna (s) relevant frequency range - for communication applications such as data transmission, for example. From 17 to 31 GHz - are.
- the wall of the radome in a sufficiently large range for the angle of incidence starting from an orthogonal impingement of the radiation on the wall a good Have transmission behavior.
- An example of such an application is must be adapted to the protection of antennas for satellite communications in commercial aircraft, in which the Ra spines for aerodynamic reasons the design of the aircraft fuselage but which the electromag ⁇ -magnetic radiation occurs regularly not orthogonal to the radomes or this permeates.
- radomes are extensively known in three- or five-layer structures sand ⁇ more GRP and foam layers, on the one hand have a sufficient transmission behavior on ⁇ on the other hand provide sufficient structural ⁇ strength at low weight.
- suitable layer arrangements for desired frequency ranges in particular with regard to the thickness of the individual layers, whereby the dielectric constants of the individual layer materials also have to be taken into account.
- a disadvantage of the state of the art is that the quality of the transmission behavior in the case of an angle of incidence deviating from an orthogonal impingement of the electromagnetic radiation on the radome wall is strongly dependent on compliance with the previously calculated thickness of the individual layers. As a result, the manufacturing tolerances in terms of thickness of the individual layers are very low, which has a costly and costly production result.
- Object of the present invention is to provide a Radomwandung, in which the disadvantages of the prior art no longer occur or at least only to a lesser extent. This problem is solved by a Radomwandung according to the
- the invention relates to a radome wall for communication, in particular data transmission, in the frequency band of 17 to 31 GHz for use on commercial aircraft comprising a multi-layer structure with alternating arrangement of force-absorbing solid cover layers and shear-resistant core layers, wherein the Radomwandung comprises at least four cover layers, of which two form the outsides of Radomwandung, and wherein the cover layers and the core layers are of dielectric materials.
- the invention further relates to a radome for use on commercial aircraft, the wall of which is designed according to the invention.
- the Radomwandung according to the invention is characterized in that it in a sandwich construction with n> 4, and cover layers - to be because the outer sides of the wall ge ⁇ forms in each case by a covering layer - is formed of n-1 core layers.
- the cover layers are force-absorbing solid layers, which are supported by only dimensionally stable core layers and kept at a distance.
- the core layers take it compared to the outer layers only a small part of the forces acting on the component forces to exhibit under stress but only a few significant and negligible deformation under operating load (often far un ⁇ ter 1%).
- the specific gravity of the outer layer is higher than the specific gravity of Kernschich ⁇ th in the prior art sandwich constructions are known in principle and -. Not only in terms of radomes - widespread. In particular, it is known that using a sandwich construction, a high rigidity can be achieved with low weight.
- the radome wall formed in this way it is furthermore necessary for the radome wall formed in this way to have a good transmission behavior.
- ⁇ rich smallest possible attenuation and a high electrostatic ⁇ magnetic permeability be achieved angle of incidence range over the largest possible entry in the relevant for the protected by the radome antenna Frequency Ranges. While corresponding in principle can be achieved even with three- or five-layer sandwich structures according to the prior art, requires but this is a highly accurate production.
- very low manufacturing tolerances must be maintained in the prior art to reliably avoid deterioration of the transmission properties.
- the invention is based on the finding that layers in a multilayer structure of Radomwandung with at least four deck ⁇ - that an at least seven-layer sandwich structure - a much more tolerant design compared to smaller ren thickness fluctuations lead without causing relevant deterioration of the relevant transmission characteristics.
- the production costs of a radome wall according to the invention can nevertheless be reduced compared to a three- or five-layer design from the prior art, since the manufacturing tolerances can be chosen significantly more generously.
- a high overall strength of the Radomwandung can be achieved, which can at least correspond to that of a three- or five-ply design. Also weight savings compared to the prior art are usually possible.
- the thicknesses of the individual top and core layers can be - determine the required frequency range by simple, generally known to those skilled parameter studies optimal thicknesses for the individual layers, with which good electromagnetic transmission ⁇ properties - taking account of the dielectric constant in the desired frequency range.
- the good transmission properties over a large angular range of 0 ° to about 65 °, in each case with respect to the surface normal of the outside of the Radomwandung at the point where the electromagnetic radiation impinges.
- This is particularly advantageous for radomes of antennas for Satellite communications aboard commercial aircraft operating regularly in the frequency range 17 to 31 GHz. It is thus possible to make the radome aerodynamically favorable as part of the outer shell of the aircraft, without there being a significant bandwidth loss.
- rümpf- or empennage-mounted antennas for broadband Sa ⁇ telliten Schemeschreibtragung be realized.
- the Radomwandung is surface symmetric to the median plane of the Radomwandung. Due to the symmetrical construction, it is ensured that the same good transmission properties are present both for the transmission and the reception of signals by the antenna protected by the radome wall.
- both the outer sides of the Radomwandung nearest core layers thicker than that of the central plane of the Radomwandung closest ⁇ core layer (s).
- the good transmittance especially over a wide angle of incidence range eg. From 0 ° to 65 ° ensured.
- the tolerance for the thickness of the cover layers may be for a nominal thickness to 1 mm ⁇ 30%, preferably ⁇ 20%, and for a nominal thickness greater than 1 mm ⁇ 0.3 mm, preferably ⁇ 0.2 mm.
- the tolerance for the core layers is preferably ⁇ 0.4 mm, more preferably ⁇ 0.3 mm, more preferably ⁇ 0.2 mm. Ent ⁇ speaking tolerances can be achieved in the production of a Radomwandung invention without the need for complex and expensive manufacturing processes are erforder ⁇ Lich.
- four cover layers and three core layers are provided, the material thickness of the Sequence preferably 0.42 mm (top layer), 2.00 mm ( ⁇ core layer), 0.21 mm (top layer), 1.00 mm (core layer),
- top layer 0.21 mm (top layer), 2.00 mm (core layer), 0.42 mm ( ⁇ cover layer), respectively.
- These material thicknesses can of course be provided with the tolerances mentioned above.
- the material thicknesses of the turn preferably 0.63 mm (top layer), 2.50 mm (core layer), 0.84 mm (top layer), 2.00 mm (core ⁇ layer), 1.06 mm (cover layer), 2.00 mm (core layer),
- both preferred embodiments show very good transmission properties for an angle of incidence range of 0 ° to 65 °, wherein the frequency range for the good transmission properties can be set significantly above the dielectric constant of the material used for the cover and the core layer.
- the determination of the required dielectric constant to achieve the desired frequency range is readily possible for the skilled person. It is preferred if the dielectric constant of the cover layers is greater than the dielectric constant of the core layers. For a frequency range of 17 GHz to 31 ° GHz, the dielectric constant of the cover layers is preferably between 2.8 and 4.0, more preferably between 3.0 and 3.6.
- the dielectric constant of the core layers is preferably between 1.0 and 1.4, more preferably between 1.0 and 1.2.
- the cover layers are preferably each formed by one or more layers of prepreg material, preferably quartz glass fiber / epoxy prepreg. It can to act with resin pre-impregnated quartz fiber fabric, in particular wherein the resin is preferably thermosetting, more preferably is a Epo ⁇ xidharz. The use of polyester resin is also possible.
- the thickness of a single prepreg is preferably ⁇ 0.21 mm before ⁇ . With a corresponding prepreg, the thicknesses of the individual outer layers of the preferred embodiments can be readily achieved.
- the core layers are preferably each by foam Mate ⁇ rial, preferably of a polyimide foam, gebil ⁇ det.
- foam Mate ⁇ rial preferably of a polyimide foam, gebil ⁇ det.
- Schaummate- rials the required shape stability and dielektri ⁇ specific permeability can be ensured.
- Preferably can be a homogeneous surface herstel ⁇ len, which allows a large-surface connection to the overlying outer layer to the foam material.
- the radome of the invention differs from the
- FIG. 1 shows a schematic section through a first embodiment of a Radomwandung invention
- FIG. 2 shows a schematic section through a second embodiment of a Radomwandung invention.
- FIG. 1 shows a first exemplary embodiment of a radome wall 1 according to the invention for communication, in particular data transmission, in the frequency band from 17 to 31 GHz for use on commercial aircraft in a sectional view.
- the Radomwandung 1 comprises four cover layers 11, 12, 12 11 ⁇ and three core layers 21, 22, 21 ⁇ .
- the cover layers 11 and 11 ⁇ each form an outer side of the Radomwandung 1, while the core layers 21, 22, 21 ⁇ each between two cover layers 11, 12, 12 11 ⁇ are arranged.
- the outer layers 11, 12, 12, 11 are formed from ⁇ Quarzglasfa- ser / epoxy prepreg, wherein the thickness of a single ⁇ NEN prepreg layer is 0.21 mm and the thicknesses of the cover layers thereof 11, 12, 12 11 respectively exclusively a multiple ⁇ are.
- the core layers 21, 22, 21 ⁇ are made of foam material, namely of a rigid polyimide foam.
- the Radomwandung 1 is constructed surface symmetry to the median plane 2, wherein the two of the outer sides of Radomwandung 1 nearest core layers 21, 21 ⁇ are thicker than lying in the median plane 2 of Radomwandung 1 core layer 22.
- the thickness of the individual deck 11, 12, 12th 11 ⁇ and core layers 21, 22, 21 and their respective dielectric constants are shown in the following table: Layer Thickness Dielectric Constant
- the Radomwandung 1 shown has, despite the comparatively ⁇ large tolerances for a frequency range of 17 to 31 GHz at any angle of incidence between 0 ° to 65 ° on very good transmission properties.
- FIG. 2 shows a schematic sectional view of a second embodiment of a Radomwandung invention 1, which is also designed for communication or data transmission in the frequency band of 17 to 31 GHz for use on commercial aircraft.
- the Radomwandung 1 comprises five cover layers 11, 12, 13, 12 11 ⁇ and in the sequence four core layers 21, 22, 22 21 ⁇ .
- the cover layers 11 and 11 ⁇ again form an outer side of the Radomwandung 1.
- the arrangement of the remaining layers 12, 13, 12 21, 22, 22 21 ⁇ results from Figure 2.
- the cover 11, 12, 13, 12 11th ⁇ and core layers 21, 22, 22 21 ⁇ are constructed analogously to the embodiment of Figure 1.
- the Radomwandung 1 according to Figure 2 is built up area symmetrically to the center plane 2, wherein the both of the outsides of the Radomwandung 1 nearest core layers 21, 21 are ⁇ thicker than the core layers adjacent to the center plane 2 of the Radomwandung 1 lying 22, 22 ⁇ .
- a tolerance of ⁇ 20% is provided.
- the tolerance is ⁇ 0.2 mm.
- the radome wall 1 shown in FIG. 2 also has an arbitrary frequency range from 17 to 31 GHz
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22153819.2A EP4009440B1 (de) | 2016-10-27 | 2017-10-24 | Radomwandung für kommunikationsanwendungen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016221143.9A DE102016221143B4 (de) | 2016-10-27 | 2016-10-27 | Radomwandung für Kommunikationsanwendungen |
PCT/EP2017/077050 WO2018077823A1 (de) | 2016-10-27 | 2017-10-24 | Radomwandung für kommunikationsanwendungen |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22153819.2A Division-Into EP4009440B1 (de) | 2016-10-27 | 2017-10-24 | Radomwandung für kommunikationsanwendungen |
EP22153819.2A Division EP4009440B1 (de) | 2016-10-27 | 2017-10-24 | Radomwandung für kommunikationsanwendungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3533108A1 true EP3533108A1 (de) | 2019-09-04 |
EP3533108B1 EP3533108B1 (de) | 2022-03-09 |
Family
ID=60245071
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22153819.2A Active EP4009440B1 (de) | 2016-10-27 | 2017-10-24 | Radomwandung für kommunikationsanwendungen |
EP17793900.6A Active EP3533108B1 (de) | 2016-10-27 | 2017-10-24 | Radomwandung für kommunikationsanwendungen |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22153819.2A Active EP4009440B1 (de) | 2016-10-27 | 2017-10-24 | Radomwandung für kommunikationsanwendungen |
Country Status (8)
Country | Link |
---|---|
US (1) | US11095025B2 (de) |
EP (2) | EP4009440B1 (de) |
CN (1) | CN109891669B (de) |
BR (1) | BR112019008319A2 (de) |
CA (1) | CA3040797A1 (de) |
DE (1) | DE102016221143B4 (de) |
ES (2) | ES2909836T3 (de) |
WO (1) | WO2018077823A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024083680A1 (de) | 2022-10-20 | 2024-04-25 | Lufthansa Technik Ag | Radomwandung für kommunikationsanwendungen |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201914723D0 (en) | 2019-10-11 | 2019-11-27 | Rolls Royce Plc | Cleaning system and a method of cleaning |
US11621484B1 (en) * | 2019-11-21 | 2023-04-04 | General Atomics Aeronautical Systems, Inc. | Broadband radome structure |
US11969335B2 (en) | 2020-04-28 | 2024-04-30 | Cook Medical Technologies Llc | Woven graft having a taper with a re-engaged warp end |
JPWO2022176591A1 (de) * | 2021-02-19 | 2022-08-25 | ||
DE102021107538A1 (de) * | 2021-03-25 | 2022-09-29 | Airbus Defence and Space GmbH | Asymmetrisch aufgebautes Radom |
IL292212B2 (en) * | 2022-04-11 | 2024-01-01 | Israel Aerospace Ind Ltd | Radom and method for planning |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3002190A (en) * | 1955-04-15 | 1961-09-26 | Zenith Plastics Company | Multiple sandwich broad band radome |
US5182155A (en) * | 1991-04-15 | 1993-01-26 | Itt Corporation | Radome structure providing high ballistic protection with low signal loss |
US5707723A (en) | 1996-02-16 | 1998-01-13 | Mcdonnell Douglas Technologies, Inc. | Multilayer radome structure and its fabrication |
US6028565A (en) * | 1996-11-19 | 2000-02-22 | Norton Performance Plastics Corporation | W-band and X-band radome wall |
US7420523B1 (en) * | 2005-09-14 | 2008-09-02 | Radant Technologies, Inc. | B-sandwich radome fabrication |
US7463212B1 (en) * | 2005-09-14 | 2008-12-09 | Radant Technologies, Inc. | Lightweight C-sandwich radome fabrication |
JP4931838B2 (ja) * | 2008-02-18 | 2012-05-16 | 三菱電機株式会社 | レドーム |
US8111206B2 (en) | 2009-08-31 | 2012-02-07 | Chung-Shan Institute Of Science And Technology, Armaments Bureau, Ministry Of National Defense | High electromagnetic transmission composite structure |
EP2747202A1 (de) | 2012-12-18 | 2014-06-25 | EADS Deutschland GmbH | Wandung eines Radoms |
US9123998B1 (en) * | 2014-03-04 | 2015-09-01 | The Boeing Company | Lightning protected radome system |
US9537207B2 (en) * | 2014-12-11 | 2017-01-03 | Thales, Inc. | Antenna assembly with a multi-band radome and associated methods |
-
2016
- 2016-10-27 DE DE102016221143.9A patent/DE102016221143B4/de active Active
-
2017
- 2017-10-24 CN CN201780066828.9A patent/CN109891669B/zh active Active
- 2017-10-24 EP EP22153819.2A patent/EP4009440B1/de active Active
- 2017-10-24 ES ES17793900T patent/ES2909836T3/es active Active
- 2017-10-24 WO PCT/EP2017/077050 patent/WO2018077823A1/de unknown
- 2017-10-24 CA CA3040797A patent/CA3040797A1/en active Pending
- 2017-10-24 BR BR112019008319A patent/BR112019008319A2/pt unknown
- 2017-10-24 EP EP17793900.6A patent/EP3533108B1/de active Active
- 2017-10-24 ES ES22153819T patent/ES2961726T3/es active Active
- 2017-10-24 US US16/344,819 patent/US11095025B2/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024083680A1 (de) | 2022-10-20 | 2024-04-25 | Lufthansa Technik Ag | Radomwandung für kommunikationsanwendungen |
DE102022127708A1 (de) | 2022-10-20 | 2024-04-25 | Lufthansa Technik Aktiengesellschaft | Radomwandung für Kommunikationsanwendungen |
Also Published As
Publication number | Publication date |
---|---|
BR112019008319A2 (pt) | 2019-07-16 |
US11095025B2 (en) | 2021-08-17 |
EP3533108B1 (de) | 2022-03-09 |
US20200058991A1 (en) | 2020-02-20 |
CN109891669B (zh) | 2021-08-27 |
ES2909836T3 (es) | 2022-05-10 |
CN109891669A (zh) | 2019-06-14 |
EP4009440B1 (de) | 2023-09-13 |
DE102016221143B4 (de) | 2018-05-09 |
WO2018077823A1 (de) | 2018-05-03 |
DE102016221143A1 (de) | 2018-05-03 |
ES2961726T3 (es) | 2024-03-13 |
CA3040797A1 (en) | 2018-05-03 |
EP4009440A1 (de) | 2022-06-08 |
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