JPH0231882B2 - - Google Patents

Info

Publication number
JPH0231882B2
JPH0231882B2 JP56192132A JP19213281A JPH0231882B2 JP H0231882 B2 JPH0231882 B2 JP H0231882B2 JP 56192132 A JP56192132 A JP 56192132A JP 19213281 A JP19213281 A JP 19213281A JP H0231882 B2 JPH0231882 B2 JP H0231882B2
Authority
JP
Japan
Prior art keywords
magnetic
magnetic core
laminated
plastic film
permeability
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
JP56192132A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5894204A (ja
Inventor
Isao Arai
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP19213281A priority Critical patent/JPS5894204A/ja
Publication of JPS5894204A publication Critical patent/JPS5894204A/ja
Publication of JPH0231882B2 publication Critical patent/JPH0231882B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/0006—Printed inductances
    • H01F2017/0053—Printed inductances with means to reduce eddy currents

Landscapes

  • Coils Or Transformers For Communication (AREA)
  • Details Of Aerials (AREA)
JP19213281A 1981-11-30 1981-11-30 磁心入りル−プアンテナ Granted JPS5894204A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19213281A JPS5894204A (ja) 1981-11-30 1981-11-30 磁心入りル−プアンテナ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19213281A JPS5894204A (ja) 1981-11-30 1981-11-30 磁心入りル−プアンテナ

Publications (2)

Publication Number Publication Date
JPS5894204A JPS5894204A (ja) 1983-06-04
JPH0231882B2 true JPH0231882B2 (OSRAM) 1990-07-17

Family

ID=16286206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19213281A Granted JPS5894204A (ja) 1981-11-30 1981-11-30 磁心入りル−プアンテナ

Country Status (1)

Country Link
JP (1) JPS5894204A (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02131955U (OSRAM) * 1989-04-10 1990-11-01

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6157704U (OSRAM) * 1984-09-19 1986-04-18
JPS63171015U (OSRAM) * 1987-04-24 1988-11-08
US5589840A (en) * 1991-11-05 1996-12-31 Seiko Epson Corporation Wrist-type wireless instrument and antenna apparatus
WO1993009576A1 (en) * 1991-11-05 1993-05-13 Seiko Epson Corporation Antenna device for radio apparatus
EP0616384B1 (en) * 1993-03-17 2000-05-31 Seiko Epson Corporation Antenna device and apparatus including such an antenna device
US5757326A (en) * 1993-03-29 1998-05-26 Seiko Epson Corporation Slot antenna device and wireless apparatus employing the antenna device
JP3417083B2 (ja) * 1994-10-04 2003-06-16 セイコーエプソン株式会社 携帯用無線機
KR100459839B1 (ko) * 1995-08-22 2005-02-07 미쓰비시 마테리알 가부시키가이샤 트랜스폰더용안테나및트랜스폰더
US6014111A (en) * 1997-06-05 2000-01-11 Megapulse, Inc. Ferrite crossed-loop antenna of optimal geometry and construction and method of forming same
JP2002290131A (ja) * 2000-12-18 2002-10-04 Mitsubishi Materials Corp トランスポンダ用アンテナ
JP2005136689A (ja) * 2003-10-30 2005-05-26 Alpha Corp アンテナ
US7038634B2 (en) 2004-07-02 2006-05-02 Eta Sa Manufacture Horlogère Suisse Optimization of a loop antenna geometry embedded in a wristband portion of a watch
US7162217B2 (en) 2004-07-02 2007-01-09 Eta Sa Manufacture Horlogère Suisse Interconnection circuit between two loop antennas embedded in a wristband of a wrist-carried wireless instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02131955U (OSRAM) * 1989-04-10 1990-11-01

Also Published As

Publication number Publication date
JPS5894204A (ja) 1983-06-04

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