EP0954051B1 - Antenne à fente, notamment pour pièce d'horlogerie - Google Patents

Antenne à fente, notamment pour pièce d'horlogerie Download PDF

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Publication number
EP0954051B1
EP0954051B1 EP98107713A EP98107713A EP0954051B1 EP 0954051 B1 EP0954051 B1 EP 0954051B1 EP 98107713 A EP98107713 A EP 98107713A EP 98107713 A EP98107713 A EP 98107713A EP 0954051 B1 EP0954051 B1 EP 0954051B1
Authority
EP
European Patent Office
Prior art keywords
antenna
slot
conducting element
central line
output
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
EP98107713A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0954051A1 (fr
Inventor
Jean-François Zürcher
Olivier Staub
Anja Skrivervik
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.)
Asulab AG
Original Assignee
Asulab AG
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 Asulab AG filed Critical Asulab AG
Priority to EP98107713A priority Critical patent/EP0954051B1/fr
Priority to DE69816269T priority patent/DE69816269T2/de
Priority to US09/296,134 priority patent/US6130647A/en
Priority to CNB991059662A priority patent/CN1139147C/zh
Priority to JP11940599A priority patent/JP4226725B2/ja
Publication of EP0954051A1 publication Critical patent/EP0954051A1/fr
Priority to HK00102717A priority patent/HK1023656A1/xx
Application granted granted Critical
Publication of EP0954051B1 publication Critical patent/EP0954051B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/04—Input or output devices integrated in time-pieces using radio waves
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R60/00—Constructional details
    • 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
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/106—Microstrip slot antennas

Definitions

  • the present invention relates to a slot antenna intended to be connected to an unbalanced output of a antenna circuit, and more particularly, the adaptation and the excitement of such a slot antenna in horological applications.
  • the invention is not limited to these applications.
  • This type of antenna includes a conductive element disposed on a dielectric substrate and defining a radiant slit with parallel edges.
  • a conductive element disposed on a dielectric substrate and defining a radiant slit with parallel edges.
  • Such an antenna is already described in document EP 0 766 152 in the name of the Applicant.
  • Other examples of slit waits are also described in documents GB 2,304,465 and EP 0 643 437.
  • Figure 1 shows the antenna described in the document EP 0 766 152.
  • This slot antenna 11 consists in a conductive element in printed circuit 12 fixed on a dielectric substrate 13.
  • This substrate is preferably a flexible material allowing the accommodation of this antenna in a mounting groove of a watch case so that it is wrapped around the housing.
  • a radiant slot 14 is formed in the conductive element.
  • This antenna is connected to an antenna circuit comprising a micro receiver-transmitter 15 located in the housing watchmaker.
  • the connection between antenna 11 and the microphone receiver-transmitter 15 is assigned at two points excitation 16 and 17, normally by a line of transmission such as a coaxial cable.
  • This coaxial cable can be considered as the output of the antenna circuit.
  • As the output of the antenna circuit is asymmetrical, it is necessary to adapt the symmetrical antenna to this exit. Thus, it is mandatory to have a conversion mounted between the balanced antenna and the output asymmetric.
  • Such a device is known to the person skilled in the art. trade under the English term “balun” (for balanced-to-unbalanced). This "balun" is usually done using discrete elements, such as a capacitor and / or a line section.
  • a line 18 connects an excitation point 16 via an adaptation capacitor C (see figure 1) at the microphone receiver-transmitter 15 of the antenna circuit, and the other excitation point 17 is connected to ground.
  • the value of capacitor obviously depends on the frequency used, but may be of the order of several pico-farads in the applications described in this document. We understand as such a "balun" is impractical, bulky and expensive.
  • the invention aims to provide an antenna slot which avoids the use of discrete components for excitement and adaptation by offering an antenna with slot having an integrated excitation, which serves at the same time time of "balun" realizing the transition between the exit of the micro receiver-transmitter and the antenna.
  • the invention therefore relates to a slot antenna according to claim 1.
  • antenna structure optimized for excitation in a timepiece Thanks to these characteristics, antenna structure optimized for excitation in a timepiece.
  • this antenna allows obtain a gain / bandwidth ratio at least equal to that of known antennas, but with great simplification, saving space and eliminating components while being cheaper to manufacture.
  • FIGS 2 and 3 show a first mode of realization of the slot antenna according to the invention and suitable for a timepiece.
  • the structure general of the antenna according to the invention is similar to that of the antenna of the aforementioned document EP 0 766 152.
  • a slot antenna 21 which consists of a conductive element in printed circuit 22, for example copper, fixed on a dielectric substrate 23.
  • This substrate is preferably of a thin flexible material, for example example of perstorp or kapton epoxy, allowing the housing of this antenna in a mounting groove of a clock case so that it is wrapped around of the case, as explained in more detail in the above-mentioned document.
  • this substrate 23 has a thickness of the order of 0.1 mm.
  • the conductive element 22 is rectangular in shape and defines a radiating slot 24 with parallel edges.
  • the conductive element 22 has, in this example, two long parallel edges 22a and 22b, and two short edges parallel 22c, 22d.
  • the slot 24 is therefore also of rectangular shape.
  • the element conductor 22 does not completely close slot 24, but leaves a central opening 26 on a 22b of its edges long.
  • the other edge 22a could remain open instead of this edge 22b.
  • the antenna also has a central line printed 27 which is arranged in the slot 24 at the place of the opening 26.
  • This central line 27 is of the same material and is attached to substrate 23 in the same way as the conductive element 22.
  • the line central 27 has a rectangular shape having a width "d", but such a form is not mandatory.
  • the side bottom of the center line is aligned with the edge long 22b, and the upper side advances in the slot in approaching the other long edge 22a.
  • the line central 27 does not touch this edge 22a, but is distant there from a distance ⁇ .
  • the central line 27 is also distant by a distance s from each of the two ends of the long edge 22b of the conductive element 22.
  • the antenna 21 is connected to an output 29 of a circuit antenna comprising a micro receiver-transmitter 25 which is found for example in a watch case.
  • the connection between the antenna 21 and the micro receiver-transmitter 15 made by a transmission line 31 such as a cable coaxial or a microstrip line having a conductor of excitement and mass.
  • the antenna is excited by means of a signal applied to the central line 27.
  • the line excitation conductor transmission 31 is connected to an excitation point 28 located on the center line 27.
  • the ground conductor and the conductive element 22 are grounded, by example by means of a connection point, not referenced, on the long edge 22b. In the example shown, each of the two ends of this edge 22b are connected to the mass.
  • this structure of the antenna according to the invention can be compared to a coaxial cable which has also a central line (the conductor) surrounded by a grounded item. This structure provides an antenna with very good gain / bandwidth ratios compared to the antennas of the prior art.
  • the shape of the antenna 21 allows optimal use of the available space, and that miniaturization of the antenna is possible while keeping an optimal gain / size ratio. This therefore allows to use this antenna, which has a structure suitable for optimizing excitement, in a portable device such than a wristwatch.
  • Figure 4 shows a second embodiment of the antenna according to the invention.
  • the conductive element 22 ' is closed and completely surrounds the slot 24 '.
  • Line central 27 ' is inside the slot 24' and is arranged in the same way as in the first mode, that is to say that it is at a distance ⁇ from the edge long 22a 'of the conductive element 22'.
  • the central line 27 ' is not completely rectangular here, but it has, at its side near the long edge 22b 'a projection 30 which advance towards this edge 22b '.
  • the long edge 22b ' is continuous, but it has a notch to receive at least partially the projection 30 of the central line 27 '.
  • the antenna according to this second mode can also be connected directly via transmission line 31 to antenna circuit comprising the micro receiver-transmitter 25 without the need for discrete components.
  • the antenna according to the invention it is possible to incorporate it into a timepiece likely to be worn on the wrist.
  • the antenna is therefore able to receive and / or emit electromagnetic fields carrying radio messages.
  • the piece of watchmaking has organs for displaying the time, for example hands or a display digital, and an antenna circuit including the microphone receiver-transmitter to review messages received by the antenna,
  • An antenna shielding can be provided according to the invention, that is to say it is possible to provide a ground plane placed behind the substrate such that described in more detail in European patent application EP 0 766 152 above.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Waveguide Aerials (AREA)
  • Electric Clocks (AREA)
  • Support Of Aerials (AREA)
  • Structure Of Receivers (AREA)
  • Details Of Aerials (AREA)
EP98107713A 1998-04-28 1998-04-28 Antenne à fente, notamment pour pièce d'horlogerie Expired - Lifetime EP0954051B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP98107713A EP0954051B1 (fr) 1998-04-28 1998-04-28 Antenne à fente, notamment pour pièce d'horlogerie
DE69816269T DE69816269T2 (de) 1998-04-28 1998-04-28 Schlitzantenne, insbesondere für eine Uhr
US09/296,134 US6130647A (en) 1998-04-28 1999-04-22 Slot antenna in particular for a timepiece
CNB991059662A CN1139147C (zh) 1998-04-28 1999-04-27 特别用于时钟的隙缝天线
JP11940599A JP4226725B2 (ja) 1998-04-28 1999-04-27 スロットアンテナ
HK00102717A HK1023656A1 (en) 1998-04-28 2000-05-04 Slot antenna in particular for a timepiece.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98107713A EP0954051B1 (fr) 1998-04-28 1998-04-28 Antenne à fente, notamment pour pièce d'horlogerie

Publications (2)

Publication Number Publication Date
EP0954051A1 EP0954051A1 (fr) 1999-11-03
EP0954051B1 true EP0954051B1 (fr) 2003-07-09

Family

ID=8231846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98107713A Expired - Lifetime EP0954051B1 (fr) 1998-04-28 1998-04-28 Antenne à fente, notamment pour pièce d'horlogerie

Country Status (6)

Country Link
US (1) US6130647A (zh)
EP (1) EP0954051B1 (zh)
JP (1) JP4226725B2 (zh)
CN (1) CN1139147C (zh)
DE (1) DE69816269T2 (zh)
HK (1) HK1023656A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001035188A (ja) * 1999-07-26 2001-02-09 Fujitsu Ltd 半導体装置の試験方法及び半導体装置
US6897822B2 (en) * 2002-06-03 2005-05-24 The Johns Hopkins University Spiral resonator-slot antenna
US7271774B2 (en) * 2005-10-21 2007-09-18 Suunto Oy Electronic wearable device
US7215600B1 (en) * 2006-09-12 2007-05-08 Timex Group B.V. Antenna arrangement for an electronic device and an electronic device including same
US8279125B2 (en) * 2009-12-21 2012-10-02 Symbol Technologies, Inc. Compact circular polarized monopole and slot UHF RFID antenna systems and methods
US8489162B1 (en) * 2010-08-17 2013-07-16 Amazon Technologies, Inc. Slot antenna within existing device component
JP5712814B2 (ja) 2010-11-12 2015-05-07 セイコーエプソン株式会社 アンテナ内蔵式電子時計
TWI488357B (zh) * 2011-09-27 2015-06-11 Acer Inc 通訊電子裝置及其天線結構

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063246A (en) * 1976-06-01 1977-12-13 Transco Products, Inc. Coplanar stripline antenna
JPS60127803A (ja) * 1983-12-15 1985-07-08 Shigeo Matsumura 極超短波帯用自動車アンテナ結合器
US5353038A (en) * 1991-04-08 1994-10-04 Bell Helicopter Textron Inc. Automatic direction finder sense antenna
US5465098A (en) * 1991-11-05 1995-11-07 Seiko Epson Corporation Antenna apparatus for transceiver
US5589840A (en) * 1991-11-05 1996-12-31 Seiko Epson Corporation Wrist-type wireless instrument and antenna apparatus
JP2884885B2 (ja) * 1992-02-27 1999-04-19 三菱電機株式会社 マイクロストリップアンテナ
JPH0685520A (ja) * 1992-09-03 1994-03-25 Sumitomo Metal Mining Co Ltd プリントアンテナ
GB2304466B (en) * 1993-03-17 1997-10-22 Seiko Epson Corp Slot antenna device
DE69421028T2 (de) * 1993-09-10 2000-02-03 Ford-Werke Ag Schlitzantenne mit reduzierter Erdungsfläche
FR2739200B1 (fr) * 1995-09-26 1997-10-31 Asulab Sa Piece d'horlogerie comportant une antenne
JPH09232834A (ja) * 1996-02-26 1997-09-05 Sanwa Insatsu:Kk リピーターアンテナ

Also Published As

Publication number Publication date
US6130647A (en) 2000-10-10
JP4226725B2 (ja) 2009-02-18
CN1139147C (zh) 2004-02-18
DE69816269D1 (de) 2003-08-14
JP2000022435A (ja) 2000-01-21
HK1023656A1 (en) 2000-09-15
EP0954051A1 (fr) 1999-11-03
CN1234629A (zh) 1999-11-10
DE69816269T2 (de) 2004-05-27

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