EP1592085B1 - Spulenantenne - Google Patents

Spulenantenne Download PDF

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Publication number
EP1592085B1
EP1592085B1 EP20040023835 EP04023835A EP1592085B1 EP 1592085 B1 EP1592085 B1 EP 1592085B1 EP 20040023835 EP20040023835 EP 20040023835 EP 04023835 A EP04023835 A EP 04023835A EP 1592085 B1 EP1592085 B1 EP 1592085B1
Authority
EP
European Patent Office
Prior art keywords
coil antenna
resin
organic binder
magnetic core
powder
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.)
Expired - Lifetime
Application number
EP20040023835
Other languages
English (en)
French (fr)
Other versions
EP1592085A1 (de
Inventor
Yoshihiko Kato
Naoharu Yamamoto
Makoto Teshima
Mitsuharu Sato
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.)
Tokin Corp
Original Assignee
NEC Tokin Corp
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
Priority claimed from JP2004131977A external-priority patent/JP3964401B2/ja
Priority claimed from JP2004195294A external-priority patent/JP4502320B2/ja
Application filed by NEC Tokin Corp filed Critical NEC Tokin Corp
Publication of EP1592085A1 publication Critical patent/EP1592085A1/de
Application granted granted Critical
Publication of EP1592085B1 publication Critical patent/EP1592085B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Definitions

  • This invention relates to a coil antenna used for transmitting and/or for receiving radio signals within a low or medium frequency band, e.g., a frequency range of from 10 kHz to 5 MHz.
  • this invention relates to the coil antenna which also has another function different from the normal function to transmit and/or to receive low- or medium-frequency signals.
  • a typical, well-known system is an AM (amplitude modulation) radio system.
  • a relatively new system is a radio controlled timepiece such as a radio controlled clock or a radio controlled wristwatch.
  • Other relatively new system is an immobilizer for vehicle, a remote keyless entry system for vehicle or for house, or an RFID (radio frequency identification) system.
  • a radio controlled wristwatch see USP No. 6,134,188 .
  • a remote keyless entry system for vehicle see USP 6,677,851 .
  • An important component common to the above-mentioned apparatuses or the like is an antenna, especially, a coil antenna which comprises a magnetic core and a coil wound around the magnetic core.
  • a well-known magnetic core for coil antenna is made of a sintered ferrite core or a laminated core consisting of amorphous metal sheets.
  • the former is easily breakable and does not have flexibility on design because of its hardness.
  • the latter is not easily machinable and is expensive so that its manufacturing cost becomes high.
  • JP-A 2001-337181 Another coil antenna is disclosed in JP-A 2001-337181 .
  • the disclosed coil antenna is used for a radio controlled timepiece or wristwatch and has a magnetic core comprised of powder particles or flakes of ferrite or metal and a plastic binder agent.
  • the magnetic core of JP-A 2001-337181 possesses high impact resistance because of its softness and can be readily formed with low cost.
  • US 6,229,444 discloses a theftproof tag having a resonance circuit resonating to an electric wave at a specified frequency transmitted from a transmitting antenna, and a coil unit and a capacitor electrically connected to both ends of the coil unit.
  • the coil unit has a magnetic core member made of a composite material composed of a powder or flakes of a soft magnetic metal, and a plastic, and a winding wound around the periphery of the magnetic core member and connected to the capacitor.
  • EP1150311 discloses that generally spherical metal particles are surface coated with an insulating or dielectric layer, and the coated metal particles are then dispersed in a resin to form a composite magnetic or dielectric material.
  • the composite magnetic material is highly insulating, easy to prepare, free of corrosion and has improved high-frequency characteristics and withstanding voltage.
  • the coil antenna has the specific complex permeability, while the magnetic core of the coil antenna can suppress noise whose frequency ranges from high frequency to ultra high frequency.
  • the coil antenna according to an aspect of the present invention is a multifunctional coil antenna which is also servable as a noise suppressor.
  • An embodiment of the present invention has two different coil antennas. One of them is for signal transmission, while the other is for signal reception.
  • Each of the coil antennas comprises a magnetic core and a wire wound around the magnetic core.
  • Each of the magnetic cores is made of a mixture comprising soft magnetic powder and an organic binder agent and is formed to be flexible and bendable.
  • the soft magnetic powder comprises a plurality of particles each of which is coated with an insulator layer.
  • each of the magnetic cores is formed in a plate-like shape.
  • the magnetic core for signal transmission has a size of 8 x 8 x 60 mm 3 , and the wire for 10 T is wound thereon.
  • the magnetic core for signal reception has a size 2 x 10 x 60 mm 3 , and the wire for 100 T is wound thereon.
  • Each of the wires is a polyurethane enameled copper wire.
  • Each of the magnetic cores of the plate-like shapes is formed by stacking a plurality of sheet-like shaped magnetic cores thinner than the magnetic core of the plate-like shape. According to the forming method, a large press machine is not required for making a large sized magnetic core. Also, a complicated mold or die is not required for making a magnetic core of a complicated shape, because the sheet-like shaped magnetic core can be easily cut by the use of a cutter or a pair of scissors.
  • the magnetic core may have a string-like shape.
  • Each of the magnetic cores of the present embodiment is obtained by, under the normal atmospheric pressure, casting or molding and curing or hardening the above-mentioned mixtures of the soft magnetic powder and the organic binder agent.
  • the compression molding and the injection molding are not required to obtain the magnetic cores of the present embodiment.
  • the coil antenna for signal transmission and the other coil antenna for signal reception are similar to each other, except for their size and their magnetic flux density of the wires as mentioned above. Now, explanations will be made of the common matters.
  • the soft magnetic powder of this embodiment is Fe-Si-Al alloy powder, especially, Sendust powder.
  • the soft magnetic powder may be other powder.
  • the soft magnetic powder may be Fe carbonyl powder, ferrite powder, or pure iron powder.
  • the soft magnetic powder may be powder made of Fe-Si-Al alloy, Fe-Ni alloy (Permalloy), Fe-Co alloy, Fe-Co-Si alloy, Fe-Si-V alloy, Fe-Co-B alloy, Co base amorphous metal, Fe base amorphous metal, or Mo-permalloy.
  • the soft magnetic powder may be a combination of the above-mentioned powders.
  • the soft magnetic powder comprises flat particles.
  • each of the flat particles has an aspect ratio of 5 or more and its diameter is about 35 ⁇ m.
  • the insulator layer is made of non-magnetic material, especially, an oxide film.
  • the oxide film of this embodiment is formed in an annealing process for the soft magnetic powder.
  • the oxide film may be obtained by another means or way.
  • the insulator layer may be made of an organic binder agent.
  • the organic binder agent of the present embodiment is chlorinated polyethylene.
  • a titanate coupler is added to the organic binder in this embodiment.
  • a silane coupler or an aluminate coupler may be used.
  • no coupler may be used.
  • the organic binder agent may be made of another elastomer agent.
  • the organic binder agent may be thermoplastic resin, such as resin made of polyester resin, polyvinyl chloride resin, chlorinated polyethylene, polyvinyl butyral resin, polyurethane resin, cellulosic resin, polyvinyl acetate resin, phenoxy resin, polypropylene, polycarbonate resin, ABS (acrylonitrile-butadiene-styrene copolymer) resin, polyvinyl alcohol resin, polyimide resin, polyethylene resin, polyamide resin, polyacrylic ester resin, or polyacrylonitrile resin, or copolymer thereof.
  • thermoplastic resin such as resin made of polyester resin, polyvinyl chloride resin, chlorinated polyethylene, polyvinyl butyral resin, polyurethane resin, cellulosic resin, polyvinyl acetate resin, phenoxy resin, polypropylene, polycarbonate resin, ABS (acrylonitrile-butadiene-styrene
  • the organic binder agent may be thermosettable resin, such as resin made of epoxy resin, phenol resin, amide resin, imide resin, diallyl phthalate resin, unsaturated polyester resin, melamine resin, urea resin, or silicone resin, or a combination thereof.
  • the organic binder agent may be synthetic rubber, such as nitrile-butadiene rubber, styrene-butadiene rubber or a combination thereof.
  • the organic binder agent is a plastomer agent, provided that it can provide a flexible, bendable, magnetic core. Another coupling agent can be added to the organic binder.
  • the mixing ratio of the soft magnetic power is 80 wt%, and the total mixing ratio of the organic binder agent and the coupler is 20 wt%.
  • the mixing ratio of the soft magnetic powder in the mixture may be in a range of from 60 wt% to 95 wt%, both inclusive.
  • the mixing ratio of the organic binder in the mixture may be in a range of from 5 wt% to 40 wt%, both inclusive. If a coupler added thereto, the mixing ratio of the coupler in the mixture is 5 wt% or less.
  • the mixture may further comprise an organic flame retardant, such as an organic flame retardant made of halogenide, bromide polymer or a combination thereof.
  • an organic flame retardant such as an organic flame retardant made of halogenide, bromide polymer or a combination thereof.
  • the mixture may further comprise dielectric powder.
  • the coil antenna may further comprise a dielectric layer, which is formed on at least one part of the magnetic core.
  • the dielectric layer is formed on a surface of the plate-shaped magnetic core.
  • the wire is wound around the magnetic core and the dielectric layer.
  • the coil antenna may be covered by a waterproofing case, which is made of flexible elastomer, silicone resin, gum resin, polyamide resin, or a polyester resin.
  • the above-mentioned coil antennas were formed, and their characteristics were measured.
  • two coil antennas were formed of sintered ferrite cores and wires wound thereon; one of the comparative coil antenna was for signal transmission, while the other was for signal reception.
  • the comparative coil antennas had the same structures, shapes, sizes as those of the embodiment except for the materials of the magnetic cores.
  • the characteristics of the comparative coil antennas were also measured. The measured results are as follows.
  • Each of the magnetic cores of the present embodiment had rubber hardness degree of 60 or more, which was measured by using type-A durometer in accordance with JIS K 6253.
  • JIS is an abbreviation of "Japan Industrial Standard”
  • JIS K 6253 is entitled “Hardness testing methods for rubber, vulcanized or thermoplastic”.
  • the magnetic core of the present embodiment had a tensile strength of 3.8 MPa, which was measured in accordance with JIS K 6263.
  • the JIS K 6263 is entitled "Rubber, vulcanized or thermoplastics - Determination of stress relaxation”.
  • the coil antenna for signal transmission and the coil antenna for signal reception had superior transmission and reception characteristics in comparison with the comparative coil antenna for signal transmission and the comparative coil antenna for signal reception.
  • the superior transmission and reception characteristics were kept even when the coil antennas were bent. This is because the particles of the magnetic powder are separated from and independent of each other and work as "micro-cores", respectively. The number of the micro-cores does not change even when the coil antenna is bent because each of the particles is coated with the oxide film.
  • f- ⁇ characteristic of the coil antenna for signal transmission is shown in a semilogarithmic graph of Fig. 1 , wherein its vertical axis shows real part ⁇ ' and imaginary part ⁇ " of the complex permeability of the coil antenna.
  • the horizontal axis of the graph shows frequency (MHz).
  • the magnetic core has a complex permeability whose real part ⁇ ' is 70 or more over a frequency range of 10 MHz or less and whose imaginary part ⁇ " is 10 or more over a frequency range of from 10 MHz to 2000 MHz.
  • the real part ⁇ ' has a flat portion while the imaginary part ⁇ " is kept at zero or extremely low value so that the magnetic core has high sensitivity in a low or medium frequency band.
  • the imaginary part ⁇ " has a relatively large value so that the magnetic core of the coil antenna can serve as a superior noise suppressor against high-frequency noise.
  • the f- ⁇ characteristic required for the coil antenna is not limited to the embodiment but may be a specific complex permeability whose real part ⁇ ' is 20 or more over a frequency range of 10 MHz or less and whose imaginary part ⁇ " is 10 or more over a frequency range of 10 MHz or more.
  • the above-mentioned coil antenna is applicable to an electronic apparatus comprising a radio transmitting/receiving system which is transmittable/receivable radio signals ranging from 10 kHz to 5 MHz.
  • the coil antenna is also servable as a high-frequency noise suppressor within the electronic apparatus.
  • Fig. 2 shows an example, in which the above-mentioned coil antenna 10 is applied to a radio controlled wristwatch 100.
  • the radio controlled wristwatch 100 further comprises a mechanism 20 for automatically adjusting a time in accordance with radio signals received by using the coil antenna 10.
  • the radio controlled wristwatch 100 comprises a case 30 and watchbands 40 each depending therefrom.
  • the illustrated coil antenna 10 is embedded in one of the watchbands 40.
  • the magnetic core of a coil antenna may be curved within a plane parallel to the bottom plane of the case 30 and extends along an inside of the peripheral wall of the case 30.
  • the coil antenna of the present embodiment is applicable to a remote keyless entry system, wherein the coil antenna is for receiving user identification signals, which are transmitted from an object carried by a user.
  • the coil antenna may be embedded within the vehicle. More specifically, the coil antenna may be contained in a door handle of the vehicle.
  • the above-mentioned coil antenna can be used as a multiband antenna.
  • a single coil antenna can be used at a frequency for a radio controlled timepiece and at another frequency for a remote keyless entry system.

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  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Electric Clocks (AREA)

Claims (28)

  1. Rahmenantenne (10), die einen Magnetkern und einen um den Magnetkern gewickelten Draht umfasst, wobei
    der Magnetkern aus einem Gemisch, das ein weichmagnetisches Pulver und ein organisches Bindemittel enthält, hergestellt ist,
    dadurch gekennzeichnet, dass
    das magnetische Pulver, das organische Bindemittel und ihr Mischungsverhältnis in der Weise gewählt sind, dass der Magnetkern eine spezifische komplexe Permeabilität besitzt, deren Realteil µ' über einen Frequenzbereich von 10 MHz oder weniger 20 oder mehr beträgt und deren Imaginärteil µ" über einen Frequenzbereich von 10 MHz oder mehr 10 oder mehr beträgt,
    der Magnetkern so ausgebildet ist, dass er flexibel und biegsam ist,
    der Magnetkern bei normalem Atmosphärendruck durch Gießen oder Spritzgießen und Härten oder Verfestigen des Gemisches erhalten werden kann und
    das weichmagnetische Pulver mehrere Partikel enthält, wovon jedes mit einer Isolatorschicht überzogen ist.
  2. Rahmenantenne (10) nach Anspruch 1, wobei das organische Bindemittel ein Plastomermittel ist, das ein plastisch verformbares Polymermittel ist.
  3. Rahmenantenne (10) nach Anspruch 1, wobei das organische Bindemittel ein Elastomermittel ist.
  4. Rahmenantenne (10) nach Anspruch 3, wobei das organische Bindemittel ein thermoplastisches Harz ist.
  5. Rahmenantenne (10) nach Anspruch 4, wobei das organische Bindemittel aus Polyester-Harz, Polyvinylchlorid-Harz, chloriertem Polyethylen, Polyvinyl-Butyral-Harz, Polyurethan-Harz, Zelluloseharz, Polyvinylacetat-Harz, Phenoxy-Harz, Polypropylen, Polycarbonat-Harz, ABS-Harz (Acrylonitril-Butadien-Styrol-Copolymer-Harz), Polyvinylalkohol-Harz, Polyimid-Harz, Polyethylen-Harz, Polyamid-Harz, Polyacrylester-Harz oder Polyacrylonitril-Harz oder einem Copolymer hiervon hergestellt ist.
  6. Rahmenantenne (10) nach Anspruch 3, wobei das organische Bindemittel ein wärmeaushärtbares Harz ist.
  7. Rahmenantenne (10) nach Anspruch 6, wobei das organische Bindemittel aus einem Epoxid-Harz, einem Phenol-Harz, einem Amid-Harz, einem Imid-Harz, einem Diallyl-Phthalat-Harz, einem ungesättigten Polyester-Harz, einem Melamin-Harz, einem Urea-Harz oder einem Silikon-Harz oder einer Kombination hiervon hergestellt ist.
  8. Rahmenantenne (10) nach Anspruch 3, wobei das organische Bindemittel ein synthetischer Gummi ist.
  9. Rahmenantenne (10) nach Anspruch 8, wobei das organische Bindemittel aus Nitril-Butadien-Gummi, Styrol-Butadien-Gummi oder einer Kombination hiervon hergestellt ist.
  10. Rahmenantennen (10) nach einem der Ansprüche 1 bis 9, wobei das weichmagnetische Pulver ein Fe-Carbonylpulver, ein Ferritpulver, ein Pulver aus reinem Eisen oder ein Pulver, das aus einer Fe-Si-Al-Legierung, Fe-Ni-Legierung, Fe-Co-Legierung, Fe-Co-Si-Legierung, Fe-Si-V-Legierung, Fe-Co-B-Legierung, amorphem Metall auf Co-Basis, amorphem Metall auf Fe-Basis oder Mo-Permalloy hergestellt ist, oder eine Kombination hiervon ist.
  11. Rahmenantenne (10) nach einem der Ansprüche 1-10, wobei ein Mischungsverhältnis des organischen Binders in dem Gemisch in einem Bereich von 5 Gew.-% bis 40 Gew.-%, jeweils einschließlich, liegt und das Mischungsverhältnis des weichmagnetischen Pulvers in dem Gemisch entsprechend in einem Bereich von 95 Gew.-% bis 60 Gew.-%, jeweils einschließlich, liegt.
  12. Rahmenantenne (10) nach einem der Ansprüche 1 bis 11, wobei das Gemisch ferner einen organischen Flammenhemmer enthält.
  13. Rahmenantenne (10) nach Anspruch 12, wobei der organische Flammenhemmer aus einem Halogenid, einem Bromid-Polymer oder einer Kombination hiervon hergestellt ist.
  14. Rahmenantenne (10) nach einem der Ansprüche 1 bis 13, wobei das weichmagnetische Pulver mehrere flache Partikel enthält.
  15. Rahmenantenne (10) nach Anspruch 14, wobei jedes der flachen Partikel ein Seitenverhältnis von 5 oder mehr hat.
  16. Rahmenantenne (10) nach einem der Ansprüche 1 bis 15, wobei die Isolierschicht aus einem nichtmagnetischen Material hergestellt ist.
  17. Rahmenantenne (10) nach Anspruch 16, wobei die Isolierschicht aus einer Oxidschicht hergestellt ist.
  18. Rahmenantenne (10) nach Anspruch 16, wobei die Isolierschicht aus einem organischen Bindemittel hergestellt ist.
  19. Rahmenantenne (10) nach einem der Ansprüche 1 bis 18, wobei der Magnetkern eine plattenartige Form, eine scheibenartige Form oder eine strangartige Form hat.
  20. Rahmenantenne (10) nach einem der Ansprüche 1 bis 19, wobei das Gemisch ferner ein dielektrisches Pulver enthält.
  21. Rahmenantenne (10) nach einem der Ansprüche 1 bis 19, die ferner eine dielektrische Schicht enthält, die wenigstens auf einem Teil des Magnetkerns ausgebildet ist, wobei der Draht um den Magnetkern und die dielektrische Schicht gewickelt ist.
  22. Elektronische Vorrichtung, die ein Funk-Sende/Empfangs-System enthält, das Funksignale im Bereich von 10 kHz bis 5 MHz senden/empfangen kann, wobei das Funk-Sende/Empfangs-System die Rahmenantenne (10) nach einem der Ansprüche 1 bis 21 enthält.
  23. Funkgesteuerte Armbanduhr (100), die umfasst: die Rahmenantenne (10) nach einem der Ansprüche 1 bis 21; und einen Mechanismus (20) zum automatischen Einstellen einer Zeit in Übereinstimmung mit Funksignalen, die unter Verwendung der Rahmenantenne (10) empfangen werden.
  24. Funkgesteuerte Armbanduhr (100) nach Anspruch 23, die ferner ein Gehäuse (30) und ein Uhrenband (40), das hiervon absteht, umfasst, wobei die Rahmenantenne (10) in eines der Uhrenbänder (40) eingebettet ist.
  25. Funkgesteuerte Armbanduhr nach Anspruch 23, die ferner ein Gehäuse (30) und ein hiervon abstehendes Uhrenband (40) umfasst, wobei das Gehäuse eine Bodenebene und eine Umfangswand umfasst und der Magnetkern in einer Ebene parallel zu der Bodenebene gekrümmt ist und sich längs einer Innenseite der Umfangswand erstreckt.
  26. Schlüsselloses Fernzugangssystem, das die Rahmenantenne nach einem der Ansprüche 1 bis 21 umfasst, wobei die Rahmenantenne (10) dazu dient, Anwenderidentifizierungssignale, die von einem von einem Anwender getragenen Objekt gesendet werden, zu empfangen.
  27. Fahrzeug, das das schlüssellose Fernzugangssystem nach Anspruch 26 enthält, wobei die Rahmenantenne (10) in das Fahrzeug eingebettet ist.
  28. Fahrzeug nach Anspruch 27, wobei die Rahmenantenne in einem Türgriff des Fahrzeugs enthalten ist.
EP20040023835 2004-04-27 2004-10-06 Spulenantenne Expired - Lifetime EP1592085B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2004131977A JP3964401B2 (ja) 2004-04-27 2004-04-27 アンテナ用コア、コイルアンテナ、時計、携帯電話機、電子装置
JP2004131977 2004-04-27
JP2004195294A JP4502320B2 (ja) 2003-07-02 2004-07-01 コイルアンテナ
JP2004195294 2004-07-01

Publications (2)

Publication Number Publication Date
EP1592085A1 EP1592085A1 (de) 2005-11-02
EP1592085B1 true EP1592085B1 (de) 2008-07-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040023835 Expired - Lifetime EP1592085B1 (de) 2004-04-27 2004-10-06 Spulenantenne

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EP (1) EP1592085B1 (de)
DE (1) DE602004015075D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013137779A1 (ru) * 2012-03-16 2013-09-19 Научно-Производственное Общество С Ограниченной Ответственностью "Кв-Связь" Перестраиваемая резонансная антенна с согласующим устройством

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006032517B4 (de) 2006-07-12 2015-12-24 Vaccumschmelze Gmbh & Co. Kg Verfahren zur Herstellung von Pulververbundkernen und Pulververbundkern
WO2008018179A1 (fr) * 2006-08-11 2008-02-14 Mitsui Chemicals, Inc. Noyau d'antenne et antenne

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778836A (en) * 1966-12-27 1973-12-11 T Tanaka Magnetic antenna having a block or circuit components therein
JP3055703B2 (ja) * 1990-02-20 2000-06-26 日本電信電話株式会社 腕時計形受信機
JP2559074B2 (ja) * 1990-04-27 1996-11-27 株式会社クリエイティックジャパン アンテナ素子
US5986566A (en) * 1994-08-18 1999-11-16 Oi Denki Co., Ltd. Wrist band antenna
JPH1074613A (ja) * 1996-08-30 1998-03-17 Tokin Corp テープ、粘着テープ及び自己融着テープ
JP3293554B2 (ja) * 1997-09-12 2002-06-17 三菱マテリアル株式会社 盗難防止用タグ
JP3641796B2 (ja) * 1999-10-18 2005-04-27 Ｎｅｃトーキン株式会社 電磁干渉抑制体
KR100533097B1 (ko) * 2000-04-27 2005-12-02 티디케이가부시기가이샤 복합자성재료와 이것을 이용한 자성성형재료, 압분 자성분말성형재료, 자성도료, 복합 유전체재료와 이것을이용한 성형재료, 압분성형 분말재료, 도료, 프리프레그및 기판, 전자부품

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013137779A1 (ru) * 2012-03-16 2013-09-19 Научно-Производственное Общество С Ограниченной Ответственностью "Кв-Связь" Перестраиваемая резонансная антенна с согласующим устройством
EP2827445A4 (de) * 2012-03-16 2015-11-25 Fedosova Nataliya Resonante rekonfigurierbare antenne mit einem impedanzkorrektor

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DE602004015075D1 (de) 2008-08-28
EP1592085A1 (de) 2005-11-02

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