WO2001063964B1 - Induction loop - Google Patents

Induction loop

Info

Publication number
WO2001063964B1
WO2001063964B1 PCT/FI2001/000177 FI0100177W WO0163964B1 WO 2001063964 B1 WO2001063964 B1 WO 2001063964B1 FI 0100177 W FI0100177 W FI 0100177W WO 0163964 B1 WO0163964 B1 WO 0163964B1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
spiral
induction loop
conductor spiral
layers
Prior art date
Application number
PCT/FI2001/000177
Other languages
French (fr)
Other versions
WO2001063964A2 (en
WO2001063964A3 (en
Inventor
Kari Repo
Original Assignee
Benefon Oyj
Kari Repo
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 Benefon Oyj, Kari Repo filed Critical Benefon Oyj
Priority to AU40727/01A priority Critical patent/AU4072701A/en
Publication of WO2001063964A2 publication Critical patent/WO2001063964A2/en
Publication of WO2001063964A3 publication Critical patent/WO2001063964A3/en
Publication of WO2001063964B1 publication Critical patent/WO2001063964B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids

Abstract

An induction loop for the earpiece of a mobile phone, for example. According to the invention, induction is provided by planar conductor spirals (1, 2), which are arranged in at least two layers (3, 4) and connected in series, the direction of rotation of which on the different layers (3, 4) being the same.

Claims

oAMENDED CLAIMS[received by the International Bureau on 21 September 2001 (21.09.01); original claims 1-10 replaced by amended claims 1-7 (2 pages)]
1. An induction loop, by which induction is provided by planar conductor spirals (1, 2), which as connected in series are arranged on at least two layers (3, 4), and the direction of rotation of which on the different layers (3, 4) is the same, and which planar conductor spirals (1, 2) are implemented in the layers (3, 4) by a multilayer circuit board technology, characterized in that the multilayer solution of the planar conductor spirals (1, 2) comprises selectively an even or odd number of layers.
2. An induction loop according to Claim 1, characterized in that on the upper layer (3) of two superimposed layers (3, 4), where there is a first planar conductor spiral (1), the radius of curvature of the conductor spiral (1) decreases continuously, beginning from the outermost conductor cycle of the first conductor spiral (1) and ending at the innermost conductor cycle of the first conductor spiral (1), and that on the lower layer (4) of two superimposed layers (3, 4), which comprises a second planar conductor spiral (2), the radius of curvature of the second conductor spiral (2) increases continuously, beginning from the innermost conductor cycle of the second conductor spiral (2) and ending at the outermost conductor cycle of the second conductor spiral 2.
3. An induction loop according to Claim 1 and/or 2, characterized in that each cycle of the conductor spiral (1, 2), preferably coming at least two cycles or loops, is integrated durectly to a circuit board (3, 4) for a hearing aid or earpiece of a mobile device, such as a mobile phone, radio, CD or tape player or a like.
4. An induction loop according to any of the preceding Claims 1 to 3, characterized in that a surface finishing of a circuit board (3, 4) and a conductor spiral (1,2) is provided by painting.
5. An induction loop according to any of the preceding Claims 1 to 4, characterized in that the conductor spiral (1. 2) provides a good frequency response.
6. An induction loop according to any of the preceding Claims 1 to 5, characterized in that that the minor inductance of the conductor spiral (1, 2) enables an undistorted broadband frequency response.
7. An induction loop according to any of the preceding Claims 1 to 6, characterized in that that small number of cycles of the planar conductor spiral (1, 2) provides good immunity to the connection of electromagnetic interference, and that the conductor spiral (1, 2) has high immunity to interference.
PCT/FI2001/000177 2000-02-25 2001-02-21 Induction loop WO2001063964A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU40727/01A AU4072701A (en) 2000-02-25 2001-02-21 Induction loop

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20000442 2000-02-25
FI20000442A FI20000442A (en) 2000-02-25 2000-02-25 Induction loop

Publications (3)

Publication Number Publication Date
WO2001063964A2 WO2001063964A2 (en) 2001-08-30
WO2001063964A3 WO2001063964A3 (en) 2002-01-10
WO2001063964B1 true WO2001063964B1 (en) 2002-02-14

Family

ID=8557737

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2001/000177 WO2001063964A2 (en) 2000-02-25 2001-02-21 Induction loop

Country Status (3)

Country Link
AU (1) AU4072701A (en)
FI (1) FI20000442A (en)
WO (1) WO2001063964A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2504903A1 (en) * 2002-11-06 2004-05-27 Sequenom, Inc. Method for identifying risk of melanoma and treatments thereof
EP3324650B1 (en) * 2016-11-18 2019-02-27 GN Hearing A/S Antenna embedded into a multi-layered printed circuit board.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5760456A (en) * 1995-12-21 1998-06-02 Grzegorek; Andrew Z. Integrated circuit compatible planar inductors with increased Q
AU3597897A (en) * 1996-07-29 1998-02-20 Motorola, Inc. Low radiation planar inductor/transformer and method
EP0926689A3 (en) * 1997-12-18 1999-12-01 National University of Ireland, Cork Magnetic components and their production

Also Published As

Publication number Publication date
WO2001063964A2 (en) 2001-08-30
FI20000442A0 (en) 2000-02-25
AU4072701A (en) 2001-09-03
FI20000442A (en) 2001-08-25
WO2001063964A3 (en) 2002-01-10

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