EP1612887A1 - Vorrichtung zur Schirmung von Antennen vor elektromagnetischen Feldern - Google Patents

Vorrichtung zur Schirmung von Antennen vor elektromagnetischen Feldern Download PDF

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Publication number
EP1612887A1
EP1612887A1 EP05007153A EP05007153A EP1612887A1 EP 1612887 A1 EP1612887 A1 EP 1612887A1 EP 05007153 A EP05007153 A EP 05007153A EP 05007153 A EP05007153 A EP 05007153A EP 1612887 A1 EP1612887 A1 EP 1612887A1
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EP
European Patent Office
Prior art keywords
cage
antenna
antennas
shielded
shielding
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
EP05007153A
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English (en)
French (fr)
Other versions
EP1612887B1 (de
Inventor
Harm-Friedrich Dr. Harms
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.)
ThyssenKrupp Marine Systems GmbH
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Nordseewerke GmbH
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Publication date
Application filed by Nordseewerke GmbH filed Critical Nordseewerke GmbH
Priority to PL05007153T priority Critical patent/PL1612887T3/pl
Publication of EP1612887A1 publication Critical patent/EP1612887A1/de
Application granted granted Critical
Publication of EP1612887B1 publication Critical patent/EP1612887B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/52Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/52Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526Electromagnetic shields

Definitions

  • the invention relates to a device for shielding electromagnetic fields of antennas, in particular GPS antennas on naval ships by means of a screen cage as Faraday cage.
  • the object of the invention is to provide a feasible shield in a simple manner that shields a disturbing field strength sufficient and does not affect the protected device in its function.
  • the cage is formed in the manner of a cuboid, in particular in the form of a cube, for receiving and enclosing the antenna, wherein the boundary edges of the cage at least above a footprint by connected rods of electrically conductive material for forming formed by stitches.
  • the corresponding design is simplified in that the antenna is arranged as a generator of high frequencies to be shielded in the center of the cage formed.
  • the footprint for the arranged rods of the cage is an electrically conductive surface.
  • a plurality of cages are associated with each other in a cascade.
  • the rod length be tuned to form the mesh size of the cage as a function of a frequency of the field strength to be shielded and a useful frequency of the antenna to be shielded.
  • a cube formation 2 is formed as a cage by conductive rods 3,4 on a conductive footprint 1, which are connected to each other as vertical rods 3 and 4 horizontal bars and receive an antenna 5 in the center of the formed enclosed space.
  • corresponding machines 6 are provided for passage of the frequencies used of the enclosed antenna 5 as passage openings.
  • the length of the corresponding rods 3.4 result in accordance with the frequencies to be shielded the corresponding shielding, as indicated in Fig. 4.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

Bei einer Vorrichtung zur Schirmung elektromagnetischer Felder von Antennen über einen Faradaykäfig ist vorgesehen, daß der Käfig in Form eines Würfels gebildet ist. Hierbei sind die Begrenzungskanten mindestens oberhalb der Aufstellfläche durch verbundene Stäbe aus elektrisch leitendem Material zur Ausbildung von Maschen bzw. Fenstern.

Description

  • Die Erfindung bezieht sich auf eine Vorrichtung zur Schirmung elektromagnetischer Felder von Antennen, insbesondere GPS-Antennen auf Marineschiffen mittels eines Schirmkäfigs als Faradaykäfig.
  • Bei der Verwendung von Antennen im Oberdecksbereich von Marineschiffen werden relativ hohe Feldstärken erzeugt. Insbesondere im Hochfrequenzbereich (1,5 MHz bis 30 MHz) liegen diese bei einigen 100 V/m. Handelsübliche Geräte (Commercial off the Shelf, COTS) sind mit EMV-Festigkeiten von 10 V/m spezifiziert, militärische Geräte und Anlagen mit 200 V/m. Bei der Aufstellung von militärisch spezifizierten Geräten und Anlagen ist die Zahl der Standorte bereits beschränkt, die Verwendung von COTS-Geräten ist nur sehr eingeschränkt oder gar nicht möglich.
  • Aufgabe der Erfindung ist es, eine durchführbare Abschirmung auf einfache Weise zu schaffen, die eine störende Feldstärke ausreichend abschirmt und das geschützte Gerät in seiner Funktion nicht beeinträchtigt.
  • Die Lösung dieser Aufgabe erfolgt erfindungsgemäß dadurch, daß der Käfig in der Art eines Quaders, insbesondere in Form eines Würfels, zur Aufnahme und Umhüllung der Antenne gebildet ist, wobei die Begrenzungskanten des Käfigs mindestens oberhalb einer Aufstellfläche durch verbundene Stäbe aus elektrisch leitendem Material zur Bildung von Maschen gebildet sind.
  • Hierdurch ist auf einfache Weise eine Schirmung der Antenne bei gleichzeitigem Durchlassen der Frequenzen zu ermöglichen, d. h. eine Schirmung einer GPS-Antenne gegen HF (1 MHz bis 30 MHz) bei gleichzeitigem Durchlasen der GPS-Frequenzen von etwa 1,5 GHZ zu ermöglichen.
  • Es ist eine Schirmung im Bereich von 10 dB entsprechend einem Faktor drei bis vier erreichbar.
  • Die entsprechende Auslegung wird dadurch vereinfacht, daß die Antenne als Erzeuger von abzuschirmenden hohen Frequenzen im Zentrum des gebildeten Käfigs angeordnet ist.
  • Ferner wird vorgeschlagen, daß die Aufstellfläche für die angeordneten Stäbe des Käfigs eine elektrisch leitende Fläche ist.
  • zur Erhöhung einer Schirmung wird vorgeschlagen, daß mehrere Käfige kaskadenförmig einander zugeordnet sind.
  • Hierdurch werden bei einer Schirmung von ca. 11 dB durch einen Käfig mit zwei Käfigen etwa 20 dB und mit drei Käfigen etwa 30 dB erreicht.
  • Zur Bestimmung günstiger Verhältnisse wird vorgeschlagen, daß die Stablänge zur Bildung der Maschengröße des Käfigs in Abhängigkeit einer Frequenz der zu schirmenden Feldstärke und einer Nutzfrequenz der zu schirmenden Antenne abgestimmt ist.
  • In der zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt und erläutert. Es zeigen:
  • Fig. 1
    einen prinzipiellen Aufbau einer Anordnung mit einem würfelförmigen Käfig,
    Fig. 2
    eine Anordnung mit einer aufgenommenen GPS-Antenne,
    Fig. 3
    eine Feldverteilung in einem Käfig in Draufsicht,
    Fig. 4
    ein Diagramm einer Feldanalyse der Schirmung einer GPS-Antenne in Abhängigkeit der Würfelkantenlänge bei gleichzeitigem Durchlassen der GPS-Frequenzen von etwa 1,5 GHz.
  • Bei der dargestellten Anordnung ist auf einer leitenden Aufstellfläche 1 eine Würfelausbildung 2 als Käfig durch leitende Stäbe 3,4 gebildet, die als senkrechte Stäbe 3 und waagerechte Stäbe 4 miteinander verbunden sind und im Zentrum des gebildeten umschlossenen Raumes eine Antenne 5 aufnehmen. Hierdurch werden als Durchtrittsöffnungen entsprechende Maschinen 6 zum Durchlaß der verwendeten Frequenzen der eingeschlossene Antenne 5 geschaffen.
  • Die Länge der entsprechenden Stäbe 3,4 ergeben dabei in Abhängigkeit der abzuschirmenden Frequenzen die entsprechende Schirmung, wie es in Fig. 4 angegeben wurde.
  • zur Verdeutlichung der Anordnung wird in Fig. 3 die Feldverteilung 7 im Käfig 2 dargestellt.

Claims (5)

  1. Vorrichtung zur Schirmung elektromagnetischer Felder von Antennen, insbesondere GPS-Antennen auf Marineschiffen mittels eines Schirmkäfigs als Faradaykäfig, dadurch gekennzeichnet, daß der Käfig (2) in der Art eines Quaders, insbesondere in Form eines Würfels, zur Aufnahme und Umhüllung der Antenne (5) gebildet ist, wobei die Begrenzungskanten des Käfigs (2) mindestens oberhalb einer Aufstellfläche (1) durch verbundene Stäbe (3,4) aus elektrisch leitendem Material zur Bildung von Maschen (6) gebildet sind.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Antenne (5) als Erzeuger von abzuschirmenden hohen Frequenzen im Zentrum des gebildeten Käfigs (2) angeordnet ist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Aufstellfläche (1) für die angeordneten Stäbe (3,4) des Käfigs (2) eine elektrisch leitende Fläche ist.
  4. Vorrichtung nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß mehrere Käfige (2) kaskadenförmig einander zugeordnet sind.
  5. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Stablänge zur Bildung der Maschengröße des Käfigs (2) in Abhängigkeit einer Frequenz der zu schirmenden Feldstärke und einer Nutzfrequenz der zu schirmenden Antenne (5) abgestimmt ist.
EP05007153A 2004-06-28 2005-04-01 Vorrichtung zur Schirmung von Antennen vor elektromagnetischen Feldern Expired - Lifetime EP1612887B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05007153T PL1612887T3 (pl) 2004-06-28 2005-04-01 Urządzenie do ekranowania anten przed polami elektromagnetycznymi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004031667A DE102004031667B4 (de) 2004-06-28 2004-06-28 Vorrichtung zur Schirmung elektromagnetischer Felder von Antennen

Publications (2)

Publication Number Publication Date
EP1612887A1 true EP1612887A1 (de) 2006-01-04
EP1612887B1 EP1612887B1 (de) 2012-06-06

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EP05007153A Expired - Lifetime EP1612887B1 (de) 2004-06-28 2005-04-01 Vorrichtung zur Schirmung von Antennen vor elektromagnetischen Feldern

Country Status (6)

Country Link
EP (1) EP1612887B1 (de)
DE (1) DE102004031667B4 (de)
DK (1) DK1612887T3 (de)
ES (1) ES2388841T3 (de)
PL (1) PL1612887T3 (de)
PT (1) PT1612887E (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2091102A1 (de) * 2008-02-18 2009-08-19 TKMS Blohm + Voss Nordseewerke GmbH Vorrichtung zur Durchführung eines EMV-Systemtestes
EP2916387A1 (de) * 2014-03-04 2015-09-09 The Boeing Company Gegen Blitzeinschlag geschütztes Radom-System
EP3221924A4 (de) * 2014-11-20 2018-07-18 Fractal Antenna Systems Inc. Fraktale käfigantennen aus metamaterial

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5568162A (en) 1994-08-08 1996-10-22 Trimble Navigation Limited GPS navigation and differential-correction beacon antenna combination
FR2844639A1 (fr) * 2002-09-13 2004-03-19 Amp C3C Structure support d'antenne pour la protection contre les ondes electromagnetiques exterieures

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5568162A (en) 1994-08-08 1996-10-22 Trimble Navigation Limited GPS navigation and differential-correction beacon antenna combination
FR2844639A1 (fr) * 2002-09-13 2004-03-19 Amp C3C Structure support d'antenne pour la protection contre les ondes electromagnetiques exterieures

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ROLAND CALVAS; JACQUES DELABALLE: "Koexistenz von Starkstrom und Schwachstrom", SCHNEIDER ELECTRIC, TECHNISCHES HEFT NR. 187, April 1997 (1997-04-01), ZÜRICH, pages 1 - 25, XP002334408 *
ROLAND CALVAS; JAQUES DELABALLE: "Koexistenz von Starkstrom und Schwachstrom", SCHNEIDER ELECTRIC, TECHNISCHES HEFT NR., vol. 187, April 1997 (1997-04-01), pages 1 - 26, XP002334408

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2091102A1 (de) * 2008-02-18 2009-08-19 TKMS Blohm + Voss Nordseewerke GmbH Vorrichtung zur Durchführung eines EMV-Systemtestes
EP2916387A1 (de) * 2014-03-04 2015-09-09 The Boeing Company Gegen Blitzeinschlag geschütztes Radom-System
EP3221924A4 (de) * 2014-11-20 2018-07-18 Fractal Antenna Systems Inc. Fraktale käfigantennen aus metamaterial
US10594038B2 (en) 2014-11-20 2020-03-17 Fractal Antenna Systems, Inc. Fractal metamaterial cage antennas

Also Published As

Publication number Publication date
PT1612887E (pt) 2012-08-03
ES2388841T3 (es) 2012-10-19
PL1612887T3 (pl) 2012-11-30
DE102004031667B4 (de) 2007-09-13
DE102004031667A1 (de) 2006-02-09
DK1612887T3 (da) 2012-09-17
EP1612887B1 (de) 2012-06-06

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