EP3132495B1 - Device for the wavelength-selective shielding of an antenna disposed on board a ship - Google Patents

Device for the wavelength-selective shielding of an antenna disposed on board a ship Download PDF

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Publication number
EP3132495B1
EP3132495B1 EP15714828.9A EP15714828A EP3132495B1 EP 3132495 B1 EP3132495 B1 EP 3132495B1 EP 15714828 A EP15714828 A EP 15714828A EP 3132495 B1 EP3132495 B1 EP 3132495B1
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EP
European Patent Office
Prior art keywords
antenna
cage
screening
wavelength
electromagnetic interference
Prior art date
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EP15714828.9A
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German (de)
French (fr)
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EP3132495A1 (en
Inventor
Holger ARENDS
Thorsten BÜSCHER
Harm-Friedrich Harms
Dirk Ewers
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ThyssenKrupp AG
ThyssenKrupp Marine Systems GmbH
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ThyssenKrupp AG
ThyssenKrupp Marine Systems GmbH
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Priority to PL15714828T priority Critical patent/PL3132495T3/en
Publication of EP3132495A1 publication Critical patent/EP3132495A1/en
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Publication of EP3132495B1 publication Critical patent/EP3132495B1/en
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    • 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
    • H01Q1/34—Adaptation for use in or on ships, submarines, buoys or torpedoes
    • 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
    • H01Q1/425—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising a metallic grid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • 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
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective

Definitions

  • the present invention relates to a device for wavelength-selective shielding of an antenna arranged on a ship from electromagnetic interference waves.
  • antennas for receiving and transmitting powerful signals in the form of electromagnetic waves.
  • the antennas arranged on an upper deck in particular cause field strengths of around 100 V/m.
  • the field strength loading of the antennas associated with the high field strength then leads to an increased susceptibility to interference during operation if the antenna has a lower EMC resistance than the field strength.
  • commercial mass-produced antennas have an EMC strength of around 10 V/m and are therefore generally below the field strengths that occur, for example, on an upper deck.
  • the prior art provides for the mass-produced antenna, i. H. a components-off-the-shelf (cots) antenna, to be replaced by an expensive antenna with a correspondingly high EMC resistance or to be placed in a location on the ship where field strength is less likely to be applied. Since the space on naval ships used for military purposes is limited, it is often not possible to find an alternative mounting point for the antenna. Replacing the standard antennas is then usually associated with considerable additional costs, especially if several antennas have to be replaced.
  • cots components-off-the-shelf
  • a device for shielding an antenna from electromagnetic radiation which comprises metallic wires arranged in the form of a grid or spiral under a radome.
  • Other devices for shielding an antenna from electromagnetic radiation are out DE 199 63 003 A1 , DE 198 30 791 A1 and DE 23 21 044 A1 famous.
  • the object of the present invention is to provide a device that allows commercial, mostly mass-produced antennas with a given EMC resistance to be arranged in areas of a ship in which the field strength exceeds the EMC resistance of the antenna.
  • the object of the present invention is achieved by a device according to claim 1.
  • the device according to the invention has the advantage that the high-pass filter ensures wave-selective shielding with which a long-wave, i. H. high-frequency electromagnetic interference wave is prevented from being coupled into the shielding cage and consequently the application of the field strength by the electromagnetic interference wave can be suppressed.
  • the shielding cage is also able to prevent the decoupling of electromagnetic interference waves that emanate from the antenna in the form of spurious emissions.
  • the susceptibility to interference of the antenna with the device according to the invention can be reduced, which ultimately means that antennas with an originally lower EMC resistance can also be used in the area with a potentially high rock load.
  • the shielded antenna is preferably one whose EMC strength has a value below 20 V/m and/or is intended for satellite communication (SatCom).
  • the high-pass filter is designed in such a way that the electromagnetic signal waves required to operate the antenna are let through by the shielding cage.
  • This can be an antenna for sending and/or receiving electromagnetic waves.
  • the shielding cage is individually adapted to the antenna and/or to its area of application.
  • the device is designed in such a way that it can be placed on antennas that are already integrated in a ship.
  • a ship that it is not conceivable according to the invention that a
  • a plurality of antennas is at least partially arranged within the screen cage.
  • the electrically conductive rods are arranged in such a way that they form meshes with different mesh sizes.
  • the electrically conductive rods are arranged in such a way that they form meshes with different mesh shapes. It is conceivable that the meshes essentially have the shape of a rectangle, a trapezoid and/or a circle. Furthermore, it is conceivable that the meshes are arched to adapt to the antenna.
  • the electrically conductive rods are arranged in a grid-like manner and thereby define the self-contained meshes of the grid, a mesh size being defined by the rods delimiting the mesh.
  • the antenna is arranged in the center of the shielding cage. This allows the shielding for the antenna to be made particularly effective. It is also not conceivable according to the invention for the antenna to be offset parallel to a central axis or inclined relative to it. The meshes are then preferably adjusted accordingly in order to bring about effective shielding.
  • a mesh size that defines the mesh size varies within a mesh.
  • the mesh size is determined by a distance between two opposite points on the mesh.
  • the size of the mesh determines the shielding attenuation.
  • the shielding cage can be specifically designed in such a way that electromagnetic interference waves with a wavelength greater than a limit wavelength that is specified by the mesh size are shielded.
  • the mesh width also determines the wavelength selectivity in an advantageous manner.
  • the mesh size is adapted to the shape of the antenna. Provision is made for a surface spanned by the shielding cage to run essentially parallel to the outer surface of the antenna. As a result, the device can be designed to fit the antenna as precisely as possible.
  • the shielding cage is arranged on an electrically conductive frame, the frame being designed to accommodate the antenna.
  • the framework fixes the antenna relative to the shielding cage and advantageously ensures the contact-free arrangement between the antenna and shielding cage.
  • the framework has fastening means, via which the device is fixed to the ship. A device that is securely fastened to the ship can advantageously ensure that the antenna remains arranged without contact at a fixed relative distance from the shielding cage, even in rough seas.
  • the EMC strength of the antenna is less than 15 V/m.
  • the mesh sizes are adapted to other electromagnetic interference waves that emanate from other antennas arranged on the ship.
  • the antenna can be used with as little interference as possible.
  • the rods have a non-ferromagnetic metal and/or a rod thickness is adapted to the electromagnetic interference wave.
  • the susceptibility to failure of the antenna during operation can be further reduced by using the right material and the thickness of the rods.
  • the shield cage is not square in shape. Rather, it is provided that the shielding cage is at least partially curved. If the shielding cage surrounded the antenna squarely, the device would take up a correspondingly large amount of space (depending on the longest extent of the antenna within the shielding cage). Correspondingly, the non-square configuration of the screen cage allows the device to be shaped as space-savingly as possible, which can be correspondingly easily integrated into the ship.
  • the shielding cage is designed in such a way that it has an attenuation of more than 10 dB, preferably more than 15 dB and particularly preferably more than 20 dB for the electromagnetic interference wave.
  • the electromagnetic interference waves can be weakened in such a way that the application of field strength that would otherwise occur as a result of the long-wave electromagnetic interference waves can be suppressed in an advantageous manner.
  • the device has an exchangeable shielding cage and/or a further shielding cage which can be placed on the shielding cage for adaptation to a changed interference wavelength.
  • shielding adapted to the environment can be brought about by the respective selection of the shielding cage or the additional shielding cage. It is conceivable that different external interference sources emit electromagnetic interference waves, each with different interference wavelengths. Depending on the position of the ship relative to the external sources of interference, the shielding cage or the further shielding cage can then be selected which is suitable for the most effective possible shielding against electromagnetic interference waves emanating from the external source.
  • the screen cage can be adapted to the location of the antenna on the ship.
  • the antenna is more heavily loaded on one side by electromagnetic interference waves, for example due to its arrangement relative to a powerful transmitter, and accordingly the shielding cage, in particular its mesh shape is designed so that the most effective shielding possible for the antenna can be achieved.
  • Another object of the present invention is a ship with a device as described above. This allows me to create a ship that does not depend on custom-made antennas with reduced susceptibility to failure.
  • the custom-made products for the antennas allow for mass-produced, d. H. components-off-the-shelf (cots) antenna, to be replaced.
  • a ship 10 for which the device for wavelength-selective shielding of an antenna 1 from electromagnetic interference waves 5 is provided.
  • the ship 10 preferably includes an antenna 2 which is designed to receive and/or transmit signals in the form of electromagnetic waves, the electromagnetic signal waves.
  • the antenna 1 on such a ship is exposed to a large number of electromagnetic interference waves 5 which are essentially differ by their wavelength or frequency.
  • the individual electromagnetic interference waves 5 can be generated by an external source, for example a satellite 3 , another ship or a transmission center on land, and/or an internal source, for example another antenna 2 on the ship 10 .
  • Electromagnetic interference waves that are not intended for the operation of the antenna 1 may have a negative effect on the functionality of the antenna 1.
  • the object of the present invention is to provide a device that makes the interference-prone, mass-produced antennas 1 operational for transmitting and/or receiving electromagnetic signal waves 5 independently of the field strength at the place of use.
  • the device comprises a Faraday cage designed as a shield cage 4 .
  • the shielding cage 4 at least partially encloses the antenna 1 which would otherwise be disturbed by the electromagnetic interference waves 5 .
  • the shielding cage 4 is designed in such a way that it forms a high-pass filter.
  • the shielding cage 4 blocks interfering electromagnetic waves 5 with a large wavelength, i. H. low frequency, and allows electromagnetic signal waves with a small wavelength, i. H. happen at high frequency.
  • This advantageously prevents the high field strengths of the long-wave interference signals from being coupled into the cage or that—in the case of a transmitting antenna in the shielding cage 4—no long-wave spurious emissions emanating from the antenna 1 are decoupled from the shielding cage 4 .
  • the short-wave useful signals or electromagnetic signal waves required for the operation of the antenna 1 can pass through the shielding cage 1 largely without loss.
  • FIG 2 a device for wavelength-selective shielding of the antenna 1 from electromagnetic interference waves 5 according to a first exemplary embodiment of the present invention is shown.
  • the shielding cage 4 has electrically conductive rods 8 , preferably made of a non-ferromagnetic metal, with the rods 8 being arranged in a grid-like manner and thereby forming meshes 7 .
  • at least two meshes 7 differ in their mesh size, with the respective mesh size being defined by the (empty) area is fixed, which is arranged between the bars 8 delimiting the individual meshes 7 .
  • the mesh size defines an aperture of the mesh 7, which also determines which electromagnetic interference waves 5 are damped by the Faraday cage with regard to their wavelengths and is correspondingly adapted to the wavelength of one or more long-wave electromagnetic interference waves 5.
  • the device also includes a preferably electrically conductive frame 6, which is designed to accommodate the antenna 1, is attached directly or indirectly to the shielding cage 4 and preferably has fastening means with which the device is mounted on the ship 10, for example on its outer skin can.
  • the antenna 1 protruding through the frame 6 into the shielding cage 4 is thus at least partially surrounded by the shielding cage 4 and is arranged centrally in it. It is provided in particular that the shape of the shielding cage 4 is adapted to the shape of the antenna 1 .
  • a surface spanned by the shielding cage 4 runs essentially parallel to an outer surface of the antenna 1.
  • the shielding cage 4 has a curvature in its shape.
  • the meshes 7 are preferably configured in a trapezoidal manner in a curved region or the rods 8 forming the meshes are arranged in such a way that they form a trapezoidal frame for the mesh 7 .
  • the mesh size 9 is defined as the distance between two opposite points on the self-contained mesh 7. Furthermore, it is provided that the largest mesh size is smaller than 1/10 of the wavelength of the electromagnetic interference wavelength 5 and/or the smallest mesh size is larger than 1/10 of the wavelength of the electromagnetic signal wave.

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft eine Vorrichtung zur wellenlängenselektiven Abschirmung einer auf einem Schiff angeordneten Antenne vor elektromagnetischen Störwellen.The present invention relates to a device for wavelength-selective shielding of an antenna arranged on a ship from electromagnetic interference waves.

Auf Schiffen, insbesondere auf militärisch genutzten Marineschiffen gibt es eine Vielzahl an Antennen zum Empfangen und Senden von leistungsstarken Signalen in Form von elektromagnetischen Wellen. Gerade die auf einem Oberdeck angeordneten Antennen verursachen Feldstärken von etwa 100 V/m. Die mit der hohen Feldstärke einhergehende Feldstärkebeaufschlagung der Antennen führt dann zu einer erhöhten Störanfälligkeit im Betrieb, wenn die Antenne eine im Vergleich zur Feldstärke kleinere EMV-Festigkeit aufweist. Typischerweise haben kommerzielle seriengefertigte Antennen eine EMV-Festigkeit, die etwa bei 10 V/m und damit in der Regel unterhalb der beispielsweise auf einem Oberdeck auftretenden Feldstärken liegt.On ships, especially on naval ships used by the military, there are a large number of antennas for receiving and transmitting powerful signals in the form of electromagnetic waves. The antennas arranged on an upper deck in particular cause field strengths of around 100 V/m. The field strength loading of the antennas associated with the high field strength then leads to an increased susceptibility to interference during operation if the antenna has a lower EMC resistance than the field strength. Typically, commercial mass-produced antennas have an EMC strength of around 10 V/m and are therefore generally below the field strengths that occur, for example, on an upper deck.

Um der Störanfälligkeit durch die hohen Feldstärken zu entgehen, sieht es der Stand der Technik vor, die seriengefertigte Antenne, d. h. eine components-off-the-shelf (cots)-Antenne, durch eine kostspielige Antenne mit einer entsprechend hohen EMV-Festigkeit zu ersetzen oder an einem Ort am Schiff zu platzieren, an dem eine Feldstärkenbeaufschlagung eher unwahrscheinlicher ist. Da gerade der Platz auf militärisch genutzten Marineschiffen eingeschränkt ist, lässt sich oftmals keine alternative Befestigungsstelle für die Antenne finden. Das Ersetzen der serienmäßigen Antennen ist dann in der Regel mit einem erheblichen Kostenmehraufwand verbunden, insbesondere wenn mehrere Antennen ersetzt werden müssen.In order to avoid the susceptibility to interference from the high field strengths, the prior art provides for the mass-produced antenna, i. H. a components-off-the-shelf (cots) antenna, to be replaced by an expensive antenna with a correspondingly high EMC resistance or to be placed in a location on the ship where field strength is less likely to be applied. Since the space on naval ships used for military purposes is limited, it is often not possible to find an alternative mounting point for the antenna. Replacing the standard antennas is then usually associated with considerable additional costs, especially if several antennas have to be replaced.

Aus der Druckschrift JP S58 201406 A1 ist eine Vorrichtung zur Abschirmung einer Antenne vor elektromagnetischer Strahlung bekannt, welche unter einem Radom gitterförmig oder spiralförmig angeordnete metallische Drähte umfasst. Weitere Vorrichtungen zur Abschirmung einer Antenne vor elektromagnetischer Strahlung sind aus DE 199 63 003 A1 , DE 198 30 791 A1 und DE 23 21 044 A1 bekannt.From the pamphlet JP S58 201406 A1 a device for shielding an antenna from electromagnetic radiation is known, which comprises metallic wires arranged in the form of a grid or spiral under a radome. Other devices for shielding an antenna from electromagnetic radiation are out DE 199 63 003 A1 , DE 198 30 791 A1 and DE 23 21 044 A1 famous.

Offenbarung der ErfindungDisclosure of Invention

Die Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung zur Verfügung zu stellen, die es erlaubt kommerzielle, meist seriengefertigte Antennen mit einer gegebenen EMV-Festigkeit auch in den Bereichen eines Schiffs anzuordnen, in denen die Feldstärke die EMV-Festigkeit der Antenne überschreitet.The object of the present invention is to provide a device that allows commercial, mostly mass-produced antennas with a given EMC resistance to be arranged in areas of a ship in which the field strength exceeds the EMC resistance of the antenna.

Die Aufgabe der vorliegenden Erfindung wird gelöst durch eine Vorrichtung nach Anspruch 1.The object of the present invention is achieved by a device according to claim 1.

Gegenüber dem Stand der Technik hat die erfindungsgemäße Vorrichtung den Vorteil, dass der Hochpass für eine wellenselektive Abschirmung sorgt, mit der eine langwellige, d. h. hochfrequente elektromagnetische Störwelle am Einkoppeln in den Schirmkäfig gehindert wird und folglich die Feldstärkebeaufschlagung durch die elektromagnetische Störwelle unterbunden werden kann. Handelt es sich bei der Antenne um eine Sendeantenne, ist der Schirmkäfig zudem in der Lage, das Auskoppeln von elektromagnetischen Störwellen, die in Form von Nebenaussendungen von der Antenne ausgehen, zu unterbinden. Insgesamt lässt sich dadurch die Störanfälligkeit der Antenne mit der erfindungsgemäßen Vorrichtung verringern, was schließlich dazu führt, dass auch Antennen mit einer ursprünglich niedrigeren EMV-Festigkeit im Bereich mit einer potentiell hohen Felsstärkebeaufschlagung einsetzbar sind.Compared to the prior art, the device according to the invention has the advantage that the high-pass filter ensures wave-selective shielding with which a long-wave, i. H. high-frequency electromagnetic interference wave is prevented from being coupled into the shielding cage and consequently the application of the field strength by the electromagnetic interference wave can be suppressed. If the antenna is a transmitting antenna, the shielding cage is also able to prevent the decoupling of electromagnetic interference waves that emanate from the antenna in the form of spurious emissions. Overall, the susceptibility to interference of the antenna with the device according to the invention can be reduced, which ultimately means that antennas with an originally lower EMC resistance can also be used in the area with a potentially high rock load.

Vorzugsweise handelt es sich bei der abgeschirmten Antenne um eine solche, deren EMV-Festigkeit einen Wert unter 20 V/m aufweist und/oder für die Satellitenkommunikation (SatCom) vorgesehen ist. Insbesondere ist der Hochpass derart ausgestaltet, dass die zum Betrieb der Antenne erforderlichen elektromagnetischen Signalwellen vom Schirmkäfig durchgelassen werden. Dabei kann es sich um eine Antenne zum Senden und/oder Empfangen von elektromagnetischen Wellen handeln. Insbesondere ist es vorgesehen, dass der Schirmkäfig individuell an die Antenne und/oder an sein Einsatzgebiet angepasst ist. Weiterhin ist es denkbar, dass die Vorrichtung derart ausgestaltet ist, dass sie auf bereits in einem Schiff integrierte Antennen aufsetzbar ist. Weiterhin ist es nichterfindungsgemäß denkbar, dass eineThe shielded antenna is preferably one whose EMC strength has a value below 20 V/m and/or is intended for satellite communication (SatCom). In particular, the high-pass filter is designed in such a way that the electromagnetic signal waves required to operate the antenna are let through by the shielding cage. This can be an antenna for sending and/or receiving electromagnetic waves. In particular, it is provided that the shielding cage is individually adapted to the antenna and/or to its area of application. Furthermore, it is conceivable that the device is designed in such a way that it can be placed on antennas that are already integrated in a ship. Furthermore, it is not conceivable according to the invention that a

Mehrzahl an Antennen zumindest teilweise innerhalb des Schirmkäfigs angeordnet ist. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind den Unteransprüchen, sowie der Beschreibung unter Bezugnahme auf die Zeichnungen entnehmbar.A plurality of antennas is at least partially arranged within the screen cage. Advantageous configurations and developments of the invention can be found in the subclaims and the description with reference to the drawings.

Erfindungsgemäß ist es vorgesehen, dass die elektrisch leitenden Stäbe derart angeordnet sind, dass sie Maschen mit unterschiedlichen Maschengrößen bilden. In einer weiteren Ausführungsform ist es vorgesehen, dass die elektrisch leitenden Stäbe derart angeordnet sind, dass sie Maschen mit unterschiedlicher Maschenform bilden. Dabei ist es denkbar, dass die Maschen im Wesentlichen die Form eines Rechtecks, eines Trapezes und/oder eines Kreises aufweisen. Weiterhin ist es denkbar, dass die Maschen zur Anpassung an die Antenne gewölbt sind. Insbesondere sind die elektrisch leitendenden Stäbe gitterartig angeordnet und legen dadurch die in sich geschlossenen Maschen des Gitters fest, wobei eine Maschengröße durch die die Masche begrenzenden Stäbe festgelegt wird. Durch die Variation der Maschen in Form und Geometrie lässt sich die Abschirmfähigkeit bestens an die vom Umfeld und den Wellenlängen der elektromagnetischen Störwelle und der Signalwelle vorgegebenen Bedingungen anpassen, um einen möglichst effektiven Abschirmeffekt zu erzielen.According to the invention it is provided that the electrically conductive rods are arranged in such a way that they form meshes with different mesh sizes. In a further embodiment it is provided that the electrically conductive rods are arranged in such a way that they form meshes with different mesh shapes. It is conceivable that the meshes essentially have the shape of a rectangle, a trapezoid and/or a circle. Furthermore, it is conceivable that the meshes are arched to adapt to the antenna. In particular, the electrically conductive rods are arranged in a grid-like manner and thereby define the self-contained meshes of the grid, a mesh size being defined by the rods delimiting the mesh. By varying the shape and geometry of the mesh, the shielding ability can be optimally adapted to the conditions specified by the environment and the wavelengths of the electromagnetic interference wave and the signal wave, in order to achieve the most effective shielding effect possible.

Erfindungsgemäß ist es vorgesehen, dass die Antenne im Zentrum des Schirmkäfigs angeordnet ist. Dadurch lässt sich die Abschirmung für die Antenne besonderes effektiv gestalten. Es ist auch nichterfindungsgemäß denkbar, dass die Antenne parallel zu einer Zentralachse versetzt oder zu dieser geneigt ist. Vorzugsweise sind dann die Maschen entsprechend angepasst, um eine effektive Abschirmung zu bewirken.According to the invention, the antenna is arranged in the center of the shielding cage. This allows the shielding for the antenna to be made particularly effective. It is also not conceivable according to the invention for the antenna to be offset parallel to a central axis or inclined relative to it. The meshes are then preferably adjusted accordingly in order to bring about effective shielding.

Erfindungsgemäß ist es vorgesehen, dass eine die Maschengröße festlegende Maschenweite innerhalb einer Masche variiert. Dabei wird die Maschenweite durch einen Abstand zwischen zwei einander gegenüberliegenden Punkten auf der Masche festgelegt. Die Maschenweite bestimmt durch ihre Größe die Schirmdämpfung. Dadurch lässt sich der Schirmkäfig gezielt so ausgestalten, dass elektromagnetische Störwellen mit einer Wellenlänge größer als eine Grenzwellenlänge, die von der Maschenweiten vorgegeben ist, abgeschirmt werden. Mit anderen Worten: die Maschenweite bestimmt in vorteilhafter Weise die Wellenlängenselektivität mit.According to the invention, it is provided that a mesh size that defines the mesh size varies within a mesh. The mesh size is determined by a distance between two opposite points on the mesh. The size of the mesh determines the shielding attenuation. As a result, the shielding cage can be specifically designed in such a way that electromagnetic interference waves with a wavelength greater than a limit wavelength that is specified by the mesh size are shielded. In other words: the mesh width also determines the wavelength selectivity in an advantageous manner.

Erfindungsgemäß ist es vorgesehen, dass die Maschengröße an die Form der Antenne angepasst ist. Es ist vorgesehen, dass eine durch den Schirmkäfig aufgespannte Fläche im Wesentlichen parallel zu der Außenfläche der Antenne verläuft. Dadurch lässt sich die Vorrichtung möglichst passgenau an die Antenne ausgestaltet.According to the invention, the mesh size is adapted to the shape of the antenna. Provision is made for a surface spanned by the shielding cage to run essentially parallel to the outer surface of the antenna. As a result, the device can be designed to fit the antenna as precisely as possible.

In einer weiteren Ausführungsform der vorliegenden Erfindung ist es vorgesehen, dass der Schirmkäfig an einem elektrisch leitendenden Rahmengestell angeordnet ist, wobei das Rahmengestell zur Aufnahme der Antenne ausgebildet ist. Das Rahmengestell fixiert insbesondere die Antenne relativ zum Schirmkäfig und sorgt in vorteilhafter Weise für die kontaktfreie Anordnung zwischen Antenne und Schirmkäfig. Dabei ist es vorzugsweise vorgesehen, dass das Rahmengestell Befestigungsmittel aufweist, über die die Vorrichtung am Schiff fixiert wird. Durch eine sicher am Schiff befestigte Vorrichtung lässt sich in vorteilhafter Weise sicherstellen, dass die Antenne auch bei Seegang kontaktfrei mit einem fixen relativen Abstand zum Schirmkäfig angeordnet bleibt.In a further embodiment of the present invention, it is provided that the shielding cage is arranged on an electrically conductive frame, the frame being designed to accommodate the antenna. In particular, the framework fixes the antenna relative to the shielding cage and advantageously ensures the contact-free arrangement between the antenna and shielding cage. It is preferably provided that the framework has fastening means, via which the device is fixed to the ship. A device that is securely fastened to the ship can advantageously ensure that the antenna remains arranged without contact at a fixed relative distance from the shielding cage, even in rough seas.

In einer weiteren Ausführungsform der vorliegenden Erfindung ist es vorgesehen, dass

  • -- eine größte Maschenweite der Maschen kleiner ist als 1/10 der Wellenlänge der elektromagnetischen Störwellen und/oder
  • -- eine kleinste Maschenweite der Maschen größer ist als 1/10 der Wellenlänge einer elektromagnetischen Signalwelle. Vorzugsweise liegt eine durchschnittliche Maschenweite der Maschen zwischen einem 1/10 der Wellenlänge der elektromagnetischen Störwelle und einem 1/10 der Wellenlänge einer elektromagnetischen Signalwelle. Dadurch lässt sich in vorteilhafter Weise bewirken, dass die elektromagnetische Störwelle effektiv gedämpft wird und gleichzeitig die elektromagnetische Signalwelle möglichst verlustfrei den Schirmkäfig in vorteilhafter Weise passieren kann.
In a further embodiment of the present invention it is provided that
  • -- a maximum mesh size of the meshes is smaller than 1/10 of the wavelength of the electromagnetic interference waves and/or
  • -- a smallest mesh size of the mesh is larger than 1/10 of the wavelength of an electromagnetic signal wave. Preferably, an average mesh size of the meshes is between 1/10 the wavelength of the noise electromagnetic wave and 1/10 the wavelength of a signal electromagnetic wave. As a result, the electromagnetic interference wave can be advantageously damped effectively and at the same time the electromagnetic signal wave can advantageously pass through the shielding cage with as little loss as possible.

In einer weiteren Ausführungsform der vorliegenden Erfindung ist es vorgesehen, dass eine EMV-Festigkeit der Antenne kleiner ist als 15 V/m. Diese Anforderungen sind vorzugsweise bei kommerziellen, seriengefertigten Antennen vorzufinden, die aufgrund ihrer massenhaften Herstellung zumeist preisgünstig zu erstehen sind. Das Ersetzen der Spezialanfertigungen, die in ihrer Anschaffung mit Mehrkosten verbunden sind, durch die kommerziellen seriengefertigten Antennen führ zu einer Kostenersparnis, ohne die Funktionalität der Antenne zu gefährden.In a further embodiment of the present invention, it is provided that the EMC strength of the antenna is less than 15 V/m. These requirements are preferably found in commercial, mass-produced antennas, which can usually be purchased inexpensively due to their mass production. Replacing the custom-made products, which are associated with additional costs when purchasing them, with commercial series-produced antennas leads to cost savings without jeopardizing the functionality of the antenna.

In einer weiteren Ausführungsform der vorliegenden Erfindung ist es vorgesehen, dass die Maschengrößen angepasst sind an weitere elektromagnetische Störwellen, die von weiteren auf dem Schiff angeordneten Antennen ausgehen. Durch die individuelle Anpassung an die vom Schiff vorgegebenen Bedingungen lässt sich ein möglichst störungsfreier Gebrauch der Antenne ermöglichen.In a further embodiment of the present invention, it is provided that the mesh sizes are adapted to other electromagnetic interference waves that emanate from other antennas arranged on the ship. By individually adapting to the conditions specified by the ship, the antenna can be used with as little interference as possible.

In einer weiteren Ausführungsform der vorliegenden Erfindung ist es vorgesehen, dass die Stäbe ein nicht-ferromagnetisches Metall aufweisen und/oder eine Stabdicke an die elektromagnetische Störwelle angepasst ist. Durch das geeignete Material und die Dicke der Stäbe lässt sich die Störanfälligkeit der Antenne im Betrieb weiter reduzieren.In a further embodiment of the present invention, it is provided that the rods have a non-ferromagnetic metal and/or a rod thickness is adapted to the electromagnetic interference wave. The susceptibility to failure of the antenna during operation can be further reduced by using the right material and the thickness of the rods.

In einer weiteren Ausführungsform der vorliegenden Erfindung ist es vorgesehen, dass der Schirmkäfig nichtquadratisch geformt ist. Vielmehr ist es vorgesehen, dass der Schirmkäfig zumindest teilweise gewölbt ist. Würde der Schirmkäfig die Antenne quadratisch umgeben, würde die Vorrichtung entsprechend viel Platz einnehmen (abhängig von der längsten Erstreckung der Antenne innerhalb des Schirmkäfigs). Entsprechend erlaubt das nichtquadratische Ausgestalten des Schirmkäfigs eine möglichst platzsparende Formung der Vorrichtung, die sich entsprechend einfach in das Schiff integrieren lässt.In a further embodiment of the present invention, it is provided that the shield cage is not square in shape. Rather, it is provided that the shielding cage is at least partially curved. If the shielding cage surrounded the antenna squarely, the device would take up a correspondingly large amount of space (depending on the longest extent of the antenna within the shielding cage). Correspondingly, the non-square configuration of the screen cage allows the device to be shaped as space-savingly as possible, which can be correspondingly easily integrated into the ship.

In einer weiteren Ausführungsform der vorliegende Erfindung ist es vorgesehen, dass der Schirmkäfig derart ausgestaltet ist, dass er für die elektromagnetische Störwelle eine Dämpfung vom mehr als 10 dB, bevorzugt mehr als 15 dB und besonders bevorzugt mehr als 20 dB aufweist. Dadurch lassen sich die elektromagnetischen Störwellen derart abschwächen, dass die durch die langwelligen elektromagnetischen Störwellen andernfalls auftretende Feldstärkebeaufschlagung in vorteilhafter Weise unterdrückt werden kann.In a further embodiment of the present invention, it is provided that the shielding cage is designed in such a way that it has an attenuation of more than 10 dB, preferably more than 15 dB and particularly preferably more than 20 dB for the electromagnetic interference wave. As a result, the electromagnetic interference waves can be weakened in such a way that the application of field strength that would otherwise occur as a result of the long-wave electromagnetic interference waves can be suppressed in an advantageous manner.

In einer weiteren Ausführungsform der vorliegenden Erfindung ist es vorgesehen, dass die Vorrichtung einen austauschbaren Schirmkäfig und/oder einen weiteren Schirmkäfig aufweist, der auf den Schirmkäfig zur Anpassung an eine geänderte Störwellenlänge, aufsetzbar ist. Insbesondere ist es vorgesehen, dass durch die jeweilige Wahl des Schirmkäfigs bzw. des weiteren Schirmkäfigs eine an die Umgebung angepasste Abschirmung bewirkt werden kann. Es ist dabei denkbar, dass unterschiedliche externe Störquellen elektromagnetische Störwellen mit jeweils verschiedenen Störwellenlängen aussenden. Abhängig vom Standpunkt des Schiffes relativ zu den externen Störquellen kann dann der Schirmkäfig oder der weitere Schirmkäfig gewählt werden, der zu einer möglichst effektiven Abschirmung vor elektromagnetischen Störwellen, die von der externen Quelle ausgehen, geeignet ist.In a further embodiment of the present invention, it is provided that the device has an exchangeable shielding cage and/or a further shielding cage which can be placed on the shielding cage for adaptation to a changed interference wavelength. In particular, it is provided that shielding adapted to the environment can be brought about by the respective selection of the shielding cage or the additional shielding cage. It is conceivable that different external interference sources emit electromagnetic interference waves, each with different interference wavelengths. Depending on the position of the ship relative to the external sources of interference, the shielding cage or the further shielding cage can then be selected which is suitable for the most effective possible shielding against electromagnetic interference waves emanating from the external source.

Es wird offenbart, dass der Schirmkäfig an den Ort der Antenne auf dem Schiffs angepasst sein kann. Beispielsweise ist es denkbar, dass die Antenne einseitig stärker durch elektromagnetische Störwellen, beispielsweis durch seine Anordnung relativ zu einem leistungsstarken Sender, belastet wird und das entsprechend der Schirmkäfig, insbesondere seine Maschenform ausgestaltet ist, dass eine möglichst effektive Abschirmung für die Antenne erzielt werden kann.It is disclosed that the screen cage can be adapted to the location of the antenna on the ship. For example, it is conceivable that the antenna is more heavily loaded on one side by electromagnetic interference waves, for example due to its arrangement relative to a powerful transmitter, and accordingly the shielding cage, in particular its mesh shape is designed so that the most effective shielding possible for the antenna can be achieved.

Ein weiterer Gegenstand der vorliegenden Erfindung ist ein Schiff mit einer Vorrichtung wie sie oben beschrieben wurde. Dadurch lässt ich ein Schiff realisieren, bei dem man nicht auf Spezialanfertigungen für Antennen mit einer reduzierten Störanfälligkeit angewiesen ist. Insbesondere erlauben es die Spezialanfertigungen für die Antennen durch seriengefertigte, d. h. components-off-the-shelf (cots)- Antenne, zu ersetzen.Another object of the present invention is a ship with a device as described above. This allows me to create a ship that does not depend on custom-made antennas with reduced susceptibility to failure. In particular, the custom-made products for the antennas allow for mass-produced, d. H. components-off-the-shelf (cots) antenna, to be replaced.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus den Zeichnungen, sowie aus der nachfolgenden Beschreibung von bevorzugten Ausführungsformen anhand der Zeichnungen.Further details, features and advantages of the invention result from the drawings and from the following description of preferred embodiments with reference to the drawings.

Kurze Beschreibung der FigurenBrief description of the figures

  • Die Figur 1 zeigt ein Schiff mit Antennen, für das eine Vorrichtung zur wellenlängenselektiven Abschirmung der Antennen gemäß der vorliegenden Erfindung vorgesehen ist.the figure 1 shows a ship with antennas for which a device for wavelength-selective shielding of the antennas according to the present invention is provided.
  • Die Figur 2 zeigt eine Vorrichtung zur wellenlängenselektiven Abschirmung der Antenne vor elektromagnetischen Wellen gemäß einer ersten beispielhaften Ausführungsform der vorliegenden Erfindung.the figure 2 shows a device for wavelength-selective shielding of the antenna from electromagnetic waves according to a first exemplary embodiment of the present invention.
Ausführungsformen der ErfindungEmbodiments of the invention

In den verschiedenen Figuren sind gleiche Teile stets mit den gleichen Bezugszeichen versehen und werden daher in der Regel auch jeweils nur einmal benannt bzw. erwähnt.In the various figures, the same parts are always provided with the same reference symbols and are therefore usually named or mentioned only once.

In Figur 1 ist ein Schiff 10 dargestellt, für das die Vorrichtung zur wellenlängenselektiven Abschirmung einer Antenne 1 vor elektromagnetischen Störwellen 5 vorgesehen ist. Vorzugsweise umfasst das Schiff 10 eine Antenne 2, die zum Empfangen und/oder Senden von Signalen in Form von elektromagnetischen Wellen, den elektromagnetischen Signalwellen ausgebildet ist. Dabei ist die Antenne 1 auf einem solchen Schiff einer Vielzahl von elektromagnetischen Störwellen 5 ausgesetzt, die sich untereinander im Wesentlichen durch ihre Wellenlänge bzw. Frequenz unterscheiden. Insbesondere können die einzelnen elektromagnetischen Störwellen 5 von einer externen Quelle, beispielsweise einem Satellit 3, einem anderes Schiff oder einer Sendezentrale an Land, und/oder einer internen Quelle, beispielsweise einer weiteren Antenne 2 auf dem Schiff 10, erzeugt werden. Nicht für den Betrieb der Antenne 1 vorgesehene elektromagnetische Störwellen wirken sich unter Umständen nachteilig auf die Funktionstüchtigkeit der Antenne 1 aus. Ein Maß für die Störanfälligkeit der Antenne 1 ist durch ihre EMV-Festigkeit gegeben. Seriengefertigte Antennen 1 haben beispielsweise bei Frequenzen zwischen 1.5 MHz und 30 MHz eine EMF-Festigkeit von etwa 10 V/m, wobei von Antennen auf einem Oberdecksbereich eines Marineschiffs durchaus auch Feldstärken um die 100 V/m erzielt werden. Daher ist mit einer die Funktionstüchtigkeit der Antenne 1 einschränkenden Feldstärkebeaufschlagung durch die elektromagnetische Störwelle 5 zu rechnen. Es ist die Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur Verfügung zu stellen, die insbesondere die störanfälligen, seriengefertigten Antennen 1 zum Senden und/oder Empfangen von elektromagnetischen Signalwellen 5 unabhängig von der am Einsatzort herrschenden Feldstärkebeaufschlagung einsatzfähig macht. Dazu ist es vorgesehen, dass die Vorrichtung einen als Schirmkäfig 4 ausgeformten Faradaykäfig umfasst. Der Schirmkäfig 4 umhüllt dabei die vor den elektromagnetischen Störwellen 5 andernfalls gestörte Antenne 1 zumindest teilweise.In figure 1 a ship 10 is shown for which the device for wavelength-selective shielding of an antenna 1 from electromagnetic interference waves 5 is provided. The ship 10 preferably includes an antenna 2 which is designed to receive and/or transmit signals in the form of electromagnetic waves, the electromagnetic signal waves. The antenna 1 on such a ship is exposed to a large number of electromagnetic interference waves 5 which are essentially differ by their wavelength or frequency. In particular, the individual electromagnetic interference waves 5 can be generated by an external source, for example a satellite 3 , another ship or a transmission center on land, and/or an internal source, for example another antenna 2 on the ship 10 . Electromagnetic interference waves that are not intended for the operation of the antenna 1 may have a negative effect on the functionality of the antenna 1. A measure of the susceptibility of the antenna 1 to interference is given by its EMC resistance. Series-produced antennas 1 have, for example, an EMF resistance of about 10 V/m at frequencies between 1.5 MHz and 30 MHz, field strengths of around 100 V/m also being achieved by antennas on the upper deck area of a naval ship. It is therefore to be expected that the field strength of the electromagnetic interference wave 5 will limit the functionality of the antenna 1 . The object of the present invention is to provide a device that makes the interference-prone, mass-produced antennas 1 operational for transmitting and/or receiving electromagnetic signal waves 5 independently of the field strength at the place of use. For this purpose, it is provided that the device comprises a Faraday cage designed as a shield cage 4 . The shielding cage 4 at least partially encloses the antenna 1 which would otherwise be disturbed by the electromagnetic interference waves 5 .

Erfindungsgemäß ist der Schirmkäfig 4 derart ausgestaltet, dass er einen Hochpass bildet. Als solcher blockiert der Schirmkäfig 4 elektromagnetische Störwellen 5 mit einer großen Wellenläge, d. h. kleiner Frequenz, und lässt elektromagnetische Signalwellen mit einer kleinen Wellenläge, d. h. großer Frequenz passieren. Dadurch lässt sich vorteilig verhindern, dass die hohen Feldstärken der langwelligen Störsignale nicht in den Käfig einkoppeln bzw. dass - im Falle einer Sendeantenne im Schirmkäfig 4 - keine langwelligen von der Antenne 1 ausgehenden Nebenaussendungen aus dem Schirmkäfig 4 ausgekoppelt werden. Stattdessen können die für den Betrieb der Antenne 1 erforderlichen kurzwelligen Nutzsignale bzw. elektromagnetischen Signalwellen den Schirmkäfig 1 weitgehend verlustfrei passieren.According to the invention, the shielding cage 4 is designed in such a way that it forms a high-pass filter. As such, the shielding cage 4 blocks interfering electromagnetic waves 5 with a large wavelength, i. H. low frequency, and allows electromagnetic signal waves with a small wavelength, i. H. happen at high frequency. This advantageously prevents the high field strengths of the long-wave interference signals from being coupled into the cage or that—in the case of a transmitting antenna in the shielding cage 4—no long-wave spurious emissions emanating from the antenna 1 are decoupled from the shielding cage 4 . Instead, the short-wave useful signals or electromagnetic signal waves required for the operation of the antenna 1 can pass through the shielding cage 1 largely without loss.

In Figur 2 ist eine Vorrichtung zur wellenlängenselektiven Abschirmung der Antenne 1 von elektromagnetischen Störwellen 5 gemäß einer ersten beispielhaften Ausführungsform der vorliegenden Erfindung dargestellt. Dabei ist es insbesondere vorgesehen, dass der Schirmkäfig 4 elektrisch leitende Stäbe 8, vorzugsweise aus einem nicht-ferromagnetischen Metall, aufweist, wobei die Stäbe 8 gitterartig angeordnet sind und dabei Maschen 7 ausbilden. Erfindungsgemäß unterscheiden sich zumindest zwei Maschen 7 durch ihre Maschengröße, wobei die jeweilige Maschengröße durch die (Leer-)Fläche festgelegt ist, die zwischen den die einzelne Maschen 7 begrenzenden Stäben 8 angeordnet ist. Die Maschengröße legte ein Apertur der Masche 7 fest, die mitbestimmt welche elektromagnetischen Störwellen 5 in Hinblick auf ihre Wellenlängen vom Faradaykäfig gedämpft werden und ist entsprechend an die Wellenlänge einer oder mehrerer langwelligen elektromagnetischen Störwellen 5 angepasst. Weiterhin umfasst die Vorrichtung ein, vorzugsweise elektrisch leitendendes, Rahmengestell 6, das zur Aufnahme der Antenne 1 ausgestaltet ist, unmittelbar oder mittelbar am Schirmkäfig 4 angebracht ist und vorzugsweise Befestigungsmittel aufweist, mit denen die Vorrichtung am Schiff 10, beispielsweise an dessen Außenhaut, montiert werden kann. Die durch das Rahmengestell 6 in den Schirmkäfig 4 hineinragende Antenne 1 wird damit zumindest teilweise vom Schirmkäfig 4 umhüllt und ist zentral in ihm angeordnet. Dabei ist es insbesondere vorgesehen, dass der Schirmkäfig 4 in seiner Form an die Gestalt der Antenne 1 angepasst ist. Erfindungsgemäß verläuft eine vom Schirmkäfig 4 aufgespannte Fläche im Wesentlichen parallel zu einer Außenfläche der Antenne 1. Dabei weist der Schirmkäfig 4 in seiner Form eine Krümmung auf. Dabei sind die Maschen 7 in einem Krümmungsbereich vorzugsweise trapezartig ausgestaltet bzw. die die Maschen bildenden Stäbe 8 sind derart angeordnet sind, dass sie einen trapezartigen Rahmen für die Masche 7 bilden. Weiterhin ist es vorgesehen, dass der Schirmkäfig 4 als weitere Maschenform eine kreisrunde Masche 7 aufweist, die vorzugsweise in Längsrichtung der Antenne 1 oberhalb dieser angeordnet ist. Weiterhin ist es vorgesehen, dass es mindestens zwei Maschenweiten 9 für die einzelnen Maschen gibt. Insbesondere ändert sich die Maschenweite 9 innerhalb der Erstreckung der einzelnen Masche 7. Dabei wird die Maschenweite 9 als der Abstand zwischen zwei gegenüberliegenden Punkten auf der in sich geschlossenen Masche 7 festgelegt. Weiterhin ist es vorgesehen, dass eine größte Maschenweite kleiner ist als 1/10 der Wellenlänge der elektromagnetischen Störwellenlänge 5 und/oder eine kleinste Maschenweite größer ist als 1/10 der Wellenlänge der elektromagnetischen Signalwelle.In figure 2 a device for wavelength-selective shielding of the antenna 1 from electromagnetic interference waves 5 according to a first exemplary embodiment of the present invention is shown. It is provided in particular that the shielding cage 4 has electrically conductive rods 8 , preferably made of a non-ferromagnetic metal, with the rods 8 being arranged in a grid-like manner and thereby forming meshes 7 . According to the invention, at least two meshes 7 differ in their mesh size, with the respective mesh size being defined by the (empty) area is fixed, which is arranged between the bars 8 delimiting the individual meshes 7 . The mesh size defines an aperture of the mesh 7, which also determines which electromagnetic interference waves 5 are damped by the Faraday cage with regard to their wavelengths and is correspondingly adapted to the wavelength of one or more long-wave electromagnetic interference waves 5. The device also includes a preferably electrically conductive frame 6, which is designed to accommodate the antenna 1, is attached directly or indirectly to the shielding cage 4 and preferably has fastening means with which the device is mounted on the ship 10, for example on its outer skin can. The antenna 1 protruding through the frame 6 into the shielding cage 4 is thus at least partially surrounded by the shielding cage 4 and is arranged centrally in it. It is provided in particular that the shape of the shielding cage 4 is adapted to the shape of the antenna 1 . According to the invention, a surface spanned by the shielding cage 4 runs essentially parallel to an outer surface of the antenna 1. The shielding cage 4 has a curvature in its shape. The meshes 7 are preferably configured in a trapezoidal manner in a curved region or the rods 8 forming the meshes are arranged in such a way that they form a trapezoidal frame for the mesh 7 . Provision is also made for the shielding cage 4 to have a circular mesh 7 as a further mesh shape, which is preferably arranged in the longitudinal direction of the antenna 1 above the latter. Furthermore, it is provided that there are at least two mesh sizes 9 for the individual meshes. In particular, the mesh size 9 changes within the extension of the individual mesh 7. The mesh size 9 is defined as the distance between two opposite points on the self-contained mesh 7. Furthermore, it is provided that the largest mesh size is smaller than 1/10 of the wavelength of the electromagnetic interference wavelength 5 and/or the smallest mesh size is larger than 1/10 of the wavelength of the electromagnetic signal wave.

Bezugszeichenlistereference list

11
Antenneantenna
22
weitere Antenneanother antenna
33
Satellitsatellite
44
Schirmkäfigumbrella cage
55
elektromagnetische Welleelectromagnetic wave
66
Rahmengestellframe
77
Maschemesh
88th
elektrisch leitender Stabelectrically conductive rod
99
Maschenweitemesh size
1010
Schiffship

Claims (10)

  1. Apparatus for the wavelength-selective screening of an antenna (1) arranged on a ship (10) against an electromagnetic interference wave (5), wherein the apparatus comprises an antenna, wherein, for screening purposes, the apparatus comprises a Faraday cage, in the form of a screening cage (4), that at least partially envelops the antenna (1), wherein the antenna is arranged in the centre of the screening cage (4), wherein the screening cage (4) has bars (8) made of electrically conductive material that are arranged in such a way that the screening cage (4) forms a highpass filter for screening against the electromagnetic interference wave (5), wherein the electrically conductive bars (8) are arranged in such a way that they form meshes (7) having different mesh sizes, wherein a mesh width (9) defining the mesh size varies within a mesh (7) and the mesh size is matched to the shape of the antenna (1) and a surface generated by the screening cage (4) runs substantially parallel to the outer face of the antenna (1).
  2. Apparatus according to one of the preceding claims, wherein the screening cage (4) is arranged on an electrically conductive frame (6), the frame (6) being designed to receive the antenna (1).
  3. Apparatus according to either of the preceding claims, wherein
    - a largest mesh width is less than 1/10 of the wavelength of the electromagnetic interference waves (5) and/or
    - a smallest mesh width is greater than 1/10 of the wavelength of the electromagnetic signal wave.
  4. Apparatus according to one of the preceding claims, wherein an EMC strength of the antenna (1) is less than 15 V/m.
  5. Apparatus according to one of the preceding claims, wherein the mesh sizes are matched to further electromagnetic interference waves (5) emanating from further antennas (2) arranged on the ship (10).
  6. Apparatus according to one of the preceding claims, wherein the electrically conductive bars (8) comprise a non-ferromagnetic material and/or a bar thickness is matched to the electromagnetic interference wave (5).
  7. Apparatus according to one of the preceding claims, wherein the screening cage (4) is of non-square shape.
  8. Apparatus according to one of the preceding claims, wherein the screening cage (4) is configured such that it has an attenuation of more than 10 dB, preferably more than 15 dB and particularly preferably more than 20 dB for the electromagnetic interference wave (5).
  9. Apparatus according to one of the preceding claims, wherein the apparatus has an interchangeable screening cage and/or a further screening cage that can be placed onto the screening cage (4) for the purpose of matching to an interference wavelength that has changed.
  10. Ship (10) having an apparatus according to one of the preceding claims.
EP15714828.9A 2014-04-16 2015-04-09 Device for the wavelength-selective shielding of an antenna disposed on board a ship Active EP3132495B1 (en)

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DE102014105455.5A DE102014105455A1 (en) 2014-04-16 2014-04-16 Device for wavelength-selective shielding of an antenna arranged on a ship
PCT/EP2015/057701 WO2015158597A1 (en) 2014-04-16 2015-04-09 Device for the wavelength-selective shielding of an antenna disposed on board a ship

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JP7252630B2 (en) 2017-05-09 2023-04-05 イノベア メディカル インコーポレーテッド Systems and devices for wireless communication through electromagnetically shielded windows
CN107665516A (en) * 2017-09-30 2018-02-06 四川民工加网络科技有限公司 A kind of building site uses timing positioning Work attendance device

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US3039100A (en) * 1958-12-03 1962-06-12 Trg Inc Thin-wall radome utilizing irregularly spaced and curved conductive reinforcing ribs obviating side-lobe formation
US3154887A (en) * 1959-12-04 1964-11-03 Goodyear Aerospace Corp Random pattern radome structure
FR2181577B1 (en) * 1972-04-28 1974-07-26 Bony Gilbert
FR2881884A1 (en) * 1987-01-22 2006-08-11 Gerard Bony Radome for microwave antenna protection, has zones covered with quasi-uniform cross-hatched network of meshes, where meshes have dimensions, shapes, arrangement and/or constitutions that vary from one location to other of radome surface
DE19963003A1 (en) * 1999-12-24 2001-06-28 Bosch Gmbh Robert Vehicle radar system, e.g. for adaptive cruise control, has dielectric focusing lens or radar dome without focusing in beam path with arrangement of ferromagnetic electrical conductor tracks

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JPS58201406A (en) * 1982-05-20 1983-11-24 Mitsubishi Heavy Ind Ltd Radome
DE19830791C2 (en) * 1998-02-27 2002-01-03 Mitsubishi Electric Corp Radar device working with electromagnetic waves

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WO2015158597A1 (en) 2015-10-22

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