DE102014001616A1 - EMC Hexagonal ferrites in the frequency range of 1000 MHz - 100 GHz - Google Patents

EMC Hexagonal ferrites in the frequency range of 1000 MHz - 100 GHz Download PDF

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Publication number
DE102014001616A1
DE102014001616A1 DE102014001616.1A DE102014001616A DE102014001616A1 DE 102014001616 A1 DE102014001616 A1 DE 102014001616A1 DE 102014001616 A DE102014001616 A DE 102014001616A DE 102014001616 A1 DE102014001616 A1 DE 102014001616A1
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Prior art keywords
emc
ferrites
hexagonal
energy
emv
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DE102014001616.1A
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German (de)
Inventor
Frank Gräbner
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IMG ELECTRONIC & POWER SYSTEMS GmbH
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IMG ELECTRONIC & POWER SYSTEMS GmbH
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    • 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
    • H01Q17/004—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using non-directional dissipative particles, e.g. ferrite powders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H01F1/348—Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

Bei elektrischen und elektronischen Geräten besteht die Aufgabe, Störstrahlung/Radarstrahlung/HF Felder nach außen zu vermindern bzw. ganz zu vermeiden sowie den Schutz vor eingestrahlter HF-Energie zu gewährleisten. Diese elektromagnetischen Störer werden allgemein als EMV Störer bezeichnet. Der Sinn des Einsatzes der EMV hexagonalen EMV Ferrite ist der, dass die Funkstörungen im Ferritmaterial absorbiert werden und die elektrischen/elektronischen Geräte ungestört arbeiten können. Der im Patentanspruch 1 angegebenen Erfindung liegen folgende Probleme zugrunde: • Schutz anderer Geräte vor Störstrahlung zur Erhöhung innerer elektromagnetischer Sicherheitsabstände, durch den Einsatz der EMV Hexaferrite • Schutz vor Innenraum-Reflektionen von innerer und äußerer HF-Störenergie Energie • Durch die Nutzung der ferromagnetischen hexagonalen Materialien wird die HF Energie in Wärme gewandelt • Nutzung der EMV Hexaferrite als Pulver, in Laminaten, als Sinterkörper, als Gehäusematerialien, als Leitungsferrite • Schutz vor inneren Feldverzerrungen • Schirmdämfungshilfsmittel zur Erhöhung der HF-Dichtheit Diese Probleme werden durch das in Patentanspruch 1 aufgeführte Verfahren gelöst. Zu sehen ist die HF EMV Dämpfung eines EMV hexagonalen Ferritlaminates in der Bilddarstellung Bild 1.In the case of electrical and electronic devices, it is the task of reducing or completely avoiding interfering radiation / radar radiation / HF fields to the outside and of ensuring the protection against radiated RF energy. These electromagnetic interferers are commonly referred to as EMC interferers. The purpose of the use of the EMC hexagonal EMV ferrites is that the radio interferences are absorbed in the ferrite material and the electrical / electronic devices can work undisturbed. The invention specified in claim 1 are based on the following problems: • Protection of other devices against interference to increase internal electromagnetic safety distances, by using the EMC Hexaferrite • Protection against interior reflections of internal and external RF interference energy • By using the ferromagnetic hexagonal Materials the RF energy is converted into heat • Use of the EMC Hexaferrite as powder, in laminates, as sintered body, as housing materials, as conduction ferrites • Protection against internal field distortions • Screening aids to increase the HF-tightness These problems are solved by the method set forth in claim 1 solved. The RF EMI attenuation of an EMV hexagonal ferrite laminate is shown in the picture in Figure 1.

Description

Bei elektrischen und elektronischen Geräten besteht die Aufgabe, Störstrahlung/Radarstrahlung/HF Felder nach außen zu vermindern bzw. ganz zu vermeiden sowie den Schutz vor eingestrahlter HF-Energie zu gewährleisten. Diese elektromagnetischen Störer werden allgemein als EMV Störer bezeichnet. Der Sinn des Einsatzes der EMV hexagonalen EMV Ferrite ist der, dass die Funkstörungen im Ferritmaterial absorbiert werden und die elektrischen/elektronischen Geräte ungestört arbeiten können.In the case of electrical and electronic devices, it is the task of reducing or completely avoiding interfering radiation / radar radiation / HF fields to the outside and of ensuring the protection against radiated RF energy. These electromagnetic interferers are commonly referred to as EMC interferers. The purpose of the use of the EMC hexagonal EMV ferrites is that the radio interferences are absorbed in the ferrite material and the electrical / electronic devices can work undisturbed.

Der im Patentanspruch 1 angegebenen Erfindung liegen folgende Probleme zugrunde:

  • • Schutz anderer Geräte vor Störstrahlung zur Erhöhung innerer elektromagnetischer Sicherheitsabstände, durch den Einsatz der EMV Hexaferrite
  • • Schutz vor Innenraum-Reflektionen von innerer und äußerer HF-Störenergie Energie
  • • Durch die Nutzung der ferromagnetischen hexagonalen Materialien wird die HF Energie in Wärme gewandelt
  • • Nutzung der EMV Hexaferrite als Pulver, in Laminaten, als Sinterkörper, als Gehäusematerialien, als Leitungsferrite
  • • Schutz vor inneren Feldverzerrungen
  • • Schirmdämfungshilfsmittel zur Erhöhung der HF-Dichtheit
The indicated in claim 1 invention are based on the following problems:
  • • Protection of other devices from interference to increase internal electromagnetic safety distances, by using the EMC Hexaferrite
  • • Protection against interior reflections of internal and external RF interfering energy
  • • By using the ferromagnetic hexagonal materials, the RF energy is converted into heat
  • • Use of EMC Hexaferrite as a powder, in laminates, as a sintered body, as housing materials, as conductor ferrites
  • • Protection against internal field distortions
  • • Screening aid to increase RF leakage

Diese Probleme werden durch das in Patentanspruch 1 aufgeführte Verfahren gelöst. Zu sehen ist die HF EMV Dämpfung eines EMV hexagonalen Ferritlaminates in der Bilddarstellung Bild 1. Die mit der Erfindung erzielten Vorteile bei Nutzung des neuen EMV Hexaferrites ist:

  • • es werden im Inneren von Metallvolumenanordnungen oder ebenen Anordnungen Feldreflexionen und Feldresonanzen vermieden
  • • nach außen erhöht sich der Schirmdämfungswert
  • • Effekte wie nicht gewollte Feldverzerrung, Feldstreuung und Ausbreitung stehender Wellen werden vermieden
  • • die Störstrahlungsentfaltung nach außen wird vermindert bzw. ganz verhindert
  • • EMV Grenzwerte können leichter eingehalten werden
These problems are solved by the method set forth in claim 1. The RF EMC attenuation of an EMV hexagonal ferrite laminate is shown in the image representation in FIG. 1. The advantages achieved with the invention when using the new EMC hexaferrite are:
  • • Field reflections and field resonances are avoided inside metal volume arrangements or planar arrangements
  • • outward, the screen attenuation value increases
  • • Effects such as unwanted field distortion, field dispersion and propagation of standing waves are avoided
  • • The external radiation is reduced or completely prevented
  • • EMC limit values are easier to comply with

Das Verfahren nach Anspruch 1 wird in folgenden Bereichen angewandt:

  • • als EMV Entstörferrit
  • • als Laminat
  • • als Gehäuse
  • • als Sinterkörper
  • • als Leitungsferrit
  • • als reines Ferritpulver
  • • als EMV-Design-Hilfsmittel
  • • Radarschutz
  • • Verhinderung von Radarrückstreuung
  • • als Hilfe bei der Realisierung des Personenschutzes im Sinne des BImSchV (Bundesimmissionschutzgesetz vom 08.11.1996 und den Aktualisierungen)
  • • anderen technischen und wissenschaftlichen Schutzbereichen.
The method according to claim 1 is applied in the following areas:
  • • as EMC interference suppression
  • • as a laminate
  • • as a housing
  • • as a sintered body
  • • as a conductor ferrite
  • • as pure ferrite powder
  • • as an EMC design tool
  • • Radar protection
  • • Prevention of radar backscatter
  • • as an aid to the realization of personal protection within the meaning of the BImSchV (Federal Immission Control Act of 08.11.1996 and the updates)
  • • other technical and scientific protection areas.

Das variable EMV Hexaferrit für Gehäuse, Stecker, Leitungen, Antennen, Leiterplatten und andere Volumengeometrien im Frequenzbereich von 1 GHz–100 GHz innerhalb und außerhalb von geschlossenen und offenen Geometrien ist auch anwendbar auf eine Erhöhung der Gesamtschirmwirkung, hervorgerufen durch äußere elektromagnetische Einwirkung.The variable EMC hexaferrite for housings, connectors, leads, antennas, printed circuit boards and other volume geometries in the frequency range of 1 GHz-100 GHz inside and outside of closed and open geometries is also applicable to an increase in the overall screening effect, caused by external electromagnetic influence.

Das von einer beliebigen HF-Quelle ausgesandte Signal im Inneren wie auch im Äußeren von Volumengeometrien wird in einem breiten Frequenzbereich absorbiert und ein technischer Schutz vor den verschiedensten Kopplungsmechanismen erzielt.The signal emitted by any RF source, both inside and outside of volume geometries, is absorbed in a wide range of frequencies and provides technical protection against a variety of coupling mechanisms.

Es werden als Medienverbund unterschiedliche Stoffe in den verschiedensten Aggregatzuständen und Mischungen einsetzt.There are used as media composite different substances in various aggregate states and mixtures.

Hauptsächlich als, Sinterkörper Pulver, Granulate, Schäume, stark variable Spritzvergusse, Harzer verwandt.Mainly used as, sintered powder, granules, foams, highly variable sprayed, Harzer.

Dabei werden HF-Absorberarten wie

  • • Ferrite (hartmagnetische Eisenoxyde)
  • • andere nicht aufgeführte HF-Absorber
verwandt.Thereby HF-absorber types like
  • • ferrites (hard magnetic iron oxides)
  • • other unlisted RF absorbers
related.

Weitere Hilfsstoffe (Verbindungsstoffe, innerte Trägermaterialien, metallisierte Klebstoffe usw.) können im Gesamtverbundabsorptionswerkstoff eingesetzt werden.Other auxiliaries (bonding agents, internal support materials, metallized adhesives, etc.) can be used in the overall composite absorption material.

Claims (2)

EMV Hexagonale Ferrite im Frequenzbereich von 1000 MHz–100 GHz, dadurch gekennzeichnet, daß die Energie der HF-Strahlung durch den Einsatz von hexagonalen Ferriten in absorbierenden Pulvern/Granulaten/Schäumen/dehnbaren Vergussmassen, Sinterkörpern, welche im Inneren oder/und auf den Außenflächen einer Volumengeometrie (Gehäuse, Stecker, Leitung, Antenne, Leiterplatte) partiell oder als Vollbeschichtung aufgetragen/eingefüllt ist, in andere Energieformen umgewandelt wird und die Resonanzen im Inneren und Äußeren von Geometrien minimiert wird.EMV Hexagonal ferrites in the frequency range of 1000 MHz-100 GHz, characterized in that the energy of the RF radiation by the use of hexagonal ferrites in absorbent powders / granules / foams / expandable potting compounds, sintered bodies, which inside or / and on the outer surfaces A volume geometry (housing, plug, wire, antenna, circuit board) is applied / filled partially or fully coated, is converted into other forms of energy and the resonances inside and outside of geometries is minimized. EMV Hexagonale Ferrite im Frequenzbereich von 1000 MHz–100 GHz nach Patentanspruch 1, dadurch gekennzeichnet, daß diese Hexaferrite aus Ferritmaterialien einer hexagonalen Kristallstruktur bestehen. Diese Eisenoxyde können z. B. Sr Hexa Ferrite, Barium Hexa Ferrite, Co Hexa Ferrite und andere Hexaferrite der X, Y, Z, M Struktur sein, welche mit Dotierungen versehen sein können und einen Subsitutionsgrad aufweisen, oder keine Substitution aufweisen.EMV Hexagonal ferrites in the frequency range of 1000 MHz-100 GHz according to claim 1, characterized in that these hexaferrites Ferrite materials of a hexagonal crystal structure exist. These iron oxides can, for. Sr hexa ferrites, barium hexa ferrites, Co hexa ferrites and other hexaferrites of the X, Y, Z, M structure, which may be doped and have a degree of substitution, or have no substitution.
DE102014001616.1A 2014-02-10 2014-02-10 EMC Hexagonal ferrites in the frequency range of 1000 MHz - 100 GHz Withdrawn DE102014001616A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017200810A1 (en) 2016-01-26 2017-07-27 Würth Elektronik eiSos Gmbh & Co. KG An electromagnetic interference suppression component and method for producing an electromagnetic interference suppression component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017200810A1 (en) 2016-01-26 2017-07-27 Würth Elektronik eiSos Gmbh & Co. KG An electromagnetic interference suppression component and method for producing an electromagnetic interference suppression component

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