EP1612887A1 - Vorrichtung zur Schirmung von Antennen vor elektromagnetischen Feldern - Google Patents
Vorrichtung zur Schirmung von Antennen vor elektromagnetischen Feldern Download PDFInfo
- 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
- Authority
- 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
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Classifications
-
- 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
-
- 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
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
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)
- 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.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Antenne (5) als Erzeuger von abzuschirmenden hohen Frequenzen im Zentrum des gebildeten Käfigs (2) angeordnet ist.
- 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.
- Vorrichtung nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß mehrere Käfige (2) kaskadenförmig einander zugeordnet sind.
- 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.
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 |
Family
ID=34934671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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)
| 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)
| 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 |
-
2004
- 2004-06-28 DE DE102004031667A patent/DE102004031667B4/de not_active Expired - Fee Related
-
2005
- 2005-04-01 ES ES05007153T patent/ES2388841T3/es not_active Expired - Lifetime
- 2005-04-01 PT PT05007153T patent/PT1612887E/pt unknown
- 2005-04-01 DK DK05007153.9T patent/DK1612887T3/da active
- 2005-04-01 PL PL05007153T patent/PL1612887T3/pl unknown
- 2005-04-01 EP EP05007153A patent/EP1612887B1/de not_active Expired - Lifetime
Patent Citations (2)
| 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)
| 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)
| 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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