DE4423332A1 - Absorber for devices for measuring electromagnetic compatibility - Google Patents

Absorber for devices for measuring electromagnetic compatibility

Info

Publication number
DE4423332A1
DE4423332A1 DE19944423332 DE4423332A DE4423332A1 DE 4423332 A1 DE4423332 A1 DE 4423332A1 DE 19944423332 DE19944423332 DE 19944423332 DE 4423332 A DE4423332 A DE 4423332A DE 4423332 A1 DE4423332 A1 DE 4423332A1
Authority
DE
Germany
Prior art keywords
absorber
devices
electromagnetic compatibility
measuring electromagnetic
absorbers
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.)
Withdrawn
Application number
DE19944423332
Other languages
German (de)
Inventor
Wilfried Dr Daehn
Thomas Proepper
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.)
SICAN F&E GMBH (SIBET), 30419 HANNOVER, DE PROEPPE
Original Assignee
Sibet Sican Forschungs Un GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sibet Sican Forschungs Un GmbH filed Critical Sibet Sican Forschungs Un GmbH
Priority to DE19944423332 priority Critical patent/DE4423332A1/en
Priority to EP95109649A priority patent/EP0689263A1/en
Publication of DE4423332A1 publication Critical patent/DE4423332A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems

Description

Stand der TechnikState of the art

Hallen, welche für die Messung der Einstrahlfestigkeit sowie der Abstrahlung elektromagneti­ scher Welle genutzt werden, müssen innen mit Absorbern ausgestattet sein. Aufgabe der Absorber ist es Reflexionen der Wellen an den Wänden zu vermeiden oder auch nur zu reduzieren. Auf diese Weise werden Freifeldbedingungen nachgebildet. Hierfür werden heute pyramidenförmige Absorber aus Polyurethan, welches in Salz getränkt wurde, oder teilweise keramische und ferriti­ sche Plattenabsorber eingesetzt. Polyurethanabsorber sind die preiswertesten Absorbertypen. Sie stellen jedoch die höchsten Anforderungen an den Brandschutz. Keramische und ferritische Absorber sind aufgrund ihres hohen Gewichts nur bedingt einsetzbar. Die starke Erwärmung der Absorber durch die hohen elektrischen Feldstärken bei Messungen der Einstrahlfestigkeit von Geräten bewirkt eine zeitliche Begrenzung der Nutzungsdauer von EMV-Hallen.Halls, which are used for the measurement of the radiation resistance as well as the radiation electromagnetic shear wave must be equipped with absorbers on the inside. Task of the absorber is to avoid or even reduce reflections of the waves on the walls. On free field conditions are simulated in this way. For this, today they are pyramid-shaped Absorber made of polyurethane, which has been soaked in salt, or partially ceramic and ferrite cal plate absorber used. Polyurethane absorbers are the cheapest types of absorbers. she however place the highest demands on fire protection. Ceramic and ferritic Due to their high weight, absorbers can only be used to a limited extent. The strong warming of the Absorber due to the high electric field strengths when measuring the radiation resistance of Devices imposes a time limit on the useful life of EMC halls.

Der flüssigkeitsgekühlte parametrierbare AbsorberThe liquid-cooled, parameterizable absorber

Bild 1 zeigt den Querschnitt des flüssigkeitsgekühlten parametrierbaren Absorbers. Bild 2 zeigt die Drauf- und die Druntersicht. Wesentliches Konstruktionsmerkmal des Absorbers ist der Auf­ bau aus zwei oder mehreren Hohlkörpern, deren Zwischenraum vom Kühlmittel durchflossen wird. Das Kühlmittel übernimmt gleichzeitig die Aufgabe des dielektrischen Dämpfungsmittels. Durch die Zusammensetzung und die Temperatur des Kühlmittels können die elektrischen Dämp­ fungseigenschaften eingestellt (parametriert) werden. Als Kühlmittel kann Wasser variabler Ionenkonzentration eingesetzt werden. Die Erfindung beschränkt sich nicht auf die im Bild darge­ stellte Pyramidenform der den Absorber bildenden Hohlkörper. Figure 1 shows the cross section of the liquid-cooled parameterizable absorber. Picture 2 shows the top and the bottom view. An essential design feature of the absorber is the construction of two or more hollow bodies, the space between which the coolant flows. The coolant also takes on the function of the dielectric damping agent. The electrical damping properties can be set (parameterized) through the composition and temperature of the coolant. Water of variable ion concentration can be used as the coolant. The invention is not limited to the pyramid shape shown in the figure of the hollow body forming the absorber.

Technische und wirtschaftliche VorteileTechnical and economic advantages

Durch die Zwangskühlung wird eine Überhitzung des Absorbers vermieden und die Gefahr der Selbstentzündung und des Hallenbrandes gebannt. Bei Einsatz von Wasser als Kühlmittel entfällt eine aufwendige Feuerlöschanlage für die EMV-Meßhalle. Die Dämpfungseigenschaften der Absorber können über die Zusammensetzung (Ionenkonzentration) und Temperatur des Kühlmit­ tels den Erfordernissen der Halle und der Messung angepaßt werden.Overheating of the absorber is avoided by the forced cooling and the risk of Autoignition and the indoor fire are banned. When using water as a coolant, there is no need a complex fire extinguishing system for the EMC measuring hall. The damping properties of the Absorbers can about the composition (ion concentration) and temperature of the coolant be adapted to the requirements of the hall and the measurement.

Die bei herkömmlichen Polyurethanabsorbern erforderlichen Abkühlungspausen für die Absorber entfallen. Die Hallennutzung kann um bis zu 300% gesteigert werden.The cooling breaks for the absorbers required with conventional polyurethane absorbers omitted. Hall usage can be increased by up to 300%.

Claims (2)

1. Absorber für Einrichtungen zur Messung der elektromagnetischen Verträglichkeit, gekennzeichnet durch mindestens einen Hohlkörper, der ein für das elektromagnetische Feld durchlässiges Wandungsteil besitzt und ein flüssiges Arbeitsmedium aufnimmt, welches dem elek­ tromagnetischen Feld Energie entzieht.1. Absorber for devices for measuring the electromagnetic compatibility, characterized by at least one hollow body which has a wall part which is permeable to the electromagnetic field and which receives a liquid working medium which withdraws energy from the electromagnetic field. 2. Absorber nach Anspruch 1, dadurch gekennzeichnet, daß der mindestens eine Hohlkörper von dem Arbeitsmedium durchströmt ist.2. Absorber according to claim 1, characterized in that the the working medium flows through at least one hollow body.
DE19944423332 1994-06-21 1994-06-21 Absorber for devices for measuring electromagnetic compatibility Withdrawn DE4423332A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19944423332 DE4423332A1 (en) 1994-06-21 1994-06-21 Absorber for devices for measuring electromagnetic compatibility
EP95109649A EP0689263A1 (en) 1994-06-21 1995-06-21 Absorber for a device for testing the electromagnetic compatibility of electric and electronic systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944423332 DE4423332A1 (en) 1994-06-21 1994-06-21 Absorber for devices for measuring electromagnetic compatibility

Publications (1)

Publication Number Publication Date
DE4423332A1 true DE4423332A1 (en) 1996-02-15

Family

ID=6522165

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19944423332 Withdrawn DE4423332A1 (en) 1994-06-21 1994-06-21 Absorber for devices for measuring electromagnetic compatibility

Country Status (2)

Country Link
EP (1) EP0689263A1 (en)
DE (1) DE4423332A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3026894B1 (en) * 2014-10-07 2019-07-26 Psa Automobiles Sa. DEVICE FOR ADJUSTING ELECTROMAGNETIC LOSSES OF A CAVITY

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325808A (en) * 1965-09-07 1967-06-13 North American Aviation Inc Electromagnetic energy attenuator
JPH02142200A (en) * 1988-11-22 1990-05-31 Akzo Kashima Ltd Radiowave absorbing body

Also Published As

Publication number Publication date
EP0689263A1 (en) 1995-12-27

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: SICAN F&E GMBH (SIBET), 30419 HANNOVER, DE

8127 New person/name/address of the applicant

Owner name: SICAN F&E GMBH (SIBET), 30419 HANNOVER, DE PROEPPE

8130 Withdrawal