EP1315052A1 - Struktur einer PIFA-Antenne und Abschirmgehäuse für ein elektronisches tragbares Gerät - Google Patents

Struktur einer PIFA-Antenne und Abschirmgehäuse für ein elektronisches tragbares Gerät Download PDF

Info

Publication number
EP1315052A1
EP1315052A1 EP20010204447 EP01204447A EP1315052A1 EP 1315052 A1 EP1315052 A1 EP 1315052A1 EP 20010204447 EP20010204447 EP 20010204447 EP 01204447 A EP01204447 A EP 01204447A EP 1315052 A1 EP1315052 A1 EP 1315052A1
Authority
EP
European Patent Office
Prior art keywords
antenna
housing
radiant element
structure according
cover
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.)
Withdrawn
Application number
EP20010204447
Other languages
English (en)
French (fr)
Inventor
Anja Skrivervik
Jean-François Zürcher
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 EP20010204447 priority Critical patent/EP1315052A1/de
Publication of EP1315052A1 publication Critical patent/EP1315052A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • G04R60/06—Antennas attached to or integrated in clock or watch bodies
    • G04R60/10—Antennas attached to or integrated in clock or watch bodies inside cases
    • 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
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element

Definitions

  • the present invention relates to a structure forming an antenna and a shielding unit capable of containing electronic circuits in a device portable, in particular a watch, the case comprising a cover and a wall lateral, the antenna comprising an elongated radiant element disposed opposite a plane mass which is part of the housing, the radiant element having one end connected to the ground plane by a short-circuit connection and a free opposite end.
  • the invention also relates to a portable electronic device comprising a such an antenna structure, in particular a wristwatch.
  • This invention applies in particular to devices capable of transmitting and / or receiving signals high frequency electromagnetic and allowing for example to ensure a radio communication with other devices on a mobile phone network or in a Bluetooth type data transfer network.
  • a PIFA antenna structure of this kind and its incorporation into a portable device of small volume such as a timepiece are described in the Patent application EP 1 093 098 from the same applicant, which is incorporated here by reference.
  • the reader will find in the above-mentioned document a description of the prior art and principles of the structure of a PIFA antenna (Planar Inverted-F Antenna).
  • Other PIFA antenna structures for devices small are described for example in patent publications US 6,025,805, US 6,130,650, WO 97/44856, WO 01/08257 and EP 1,096,602.
  • the structure described in patent application EP 1 093 098 preferably has a generally cylindrical shape of low height, to be housed in the box of a wristwatch.
  • the radiant element of the PIFA antenna is arranged laterally, at a constant distance from the side wall of the housing. It can either protrude by relative to the generally cylindrical outline of the shielding box, either follow this contour while the housing laterally has a deep recess constant in the area covered by the radiant element.
  • the antenna proposed in this document has the advantage of being able to be fully integrated into a low-volume structure that combines compactness, rigidity and aesthetic, the radiant element forming an integral part of a housing forming the plane of mass of the antenna.
  • the dimensioning as well as the agreement and adaptation of characteristics of this antenna are relatively easy.
  • the housing constituting the ground plane of the antenna advantageously allows to house all or part of the electronics of the portable communication unit inside the antenna structure, this box thus forming a shielded box to inside which the electronics are protected and does not affect performance of the antenna.
  • the proposed antenna can thus advantageously be supplied from the interior of the housing thus formed.
  • the proposed structure elegantly combines the ground plane of the antenna and a case to accommodate not only the electronics of the portable unit, but also other components that may be present in this unit.
  • This structure can thus advantageously constitute a housing making it possible to accommodate in besides the movement of a timepiece.
  • the structure can also be surrounded or encased in an external plastic element. This external element can thus take various forms, for example the middle of a watch case.
  • the radiant element of the antenna is electrically small, but the influence of the complete structure (including the housing) determines the radiation properties of the antenna. Associated with low losses due to the absence of a dielectric between the radiant element and the ground plane, or more exactly the presence of a dielectric formed only of air, this leads to gain and efficiency remarkable antenna.
  • the antenna structure according to the aforementioned document EP 1 093 098 has a generally flattened shape and therefore usually extends in the general plan of the portable device, the functioning of the antenna is somewhat degraded when the device is placed against a body whose presence may disturb the surrounding electric field, for example a metallic body or the human body. This is precisely the case with the lateral arrangement of the antenna in a wristwatch, the antenna being so close to the wearer's arm that the latter absorbs a part of the antenna radiation.
  • the present invention aims to improve such an antenna structure of so as to remedy the aforementioned drawback, while retaining most of the advantages of the structure described in the aforementioned document.
  • the cover of the housing has an outer surface substantially flat and a recess disposed in a peripheral zone of the cover and set back from the plane of said outer surface, and in that the radiant element extends substantially in said plane above said recess, a bottom surface of which forms the ground plane with respect to the radiant element.
  • the structure described below with reference to Figures 1 to 3 constitutes a preferred embodiment of an antenna structure which can be advantageously incorporated into a timepiece provided with a transceiver radio, for example in the 2.45 GHz band usual in technology Bluetooth.
  • the structure shown forms on the one hand an antenna, indicated overall by the reference 10 in Figure 1, and on the other hand a shielding box electromagnetic indicated by the reference 11 and formed for example of two parts as seen in Figure 3, namely an upper part 12 and a bottom 13.
  • the upper part 12 comprises a cover 14, the outer surface 14a of which extends substantially in a plane 15, and a side wall 16 generally perpendicular to this plane.
  • the structure 1 has a generally cylindrical shape of low height compared to its diameter, its side wall 16 is cylindrical and its bottom 13 is flat.
  • the cover 14 has a recess 17 of generally arched shape, the depth and width of which are substantially constant. This reinforcement is limited downwards by a surface horizontal plane 18 of the housing, which is parallel to plane 15, and laterally by a vertical surface 19 connecting to the side wall 16 of the housing. Above recess 17, the cover 14 is extended by a horizontal blade extending the along the plane 15 and constituting the radiant element 20 of the antenna 10. This element located at a distance D from the bottom surface 18, which constitutes the ground plane of the antenna. The distance D is constant over the entire extent of the radiant element in the this example, but it is not necessary in all cases.
  • Element 20 has a elongated shape in an arc, preferably of constant width and less than that of the recess 17, so that it is separated from the wall 19 by a slot 21 of constant width.
  • One end 20a of the element 20 is mechanically connected and electrically to the cover 14, so that it is connected to the ground plane 18 by a short circuit link. Its other end 20b is free.
  • the radiant element carries a point of connection 23 whose usefulness will be indicated later.
  • the structure 1 described above has a configuration cylindrical exterior devoid of any protuberance, which facilitates its incorporation in a generally circular watch case.
  • this configuration could be different according to the needs, in particular for incorporation into a rectangular device.
  • the two parts 12 and 13 are entirely metallic, for example brass.
  • the bottom 13 in this case has an inner rim 24 which can be threaded externally to screw into a corresponding thread on the side wall 16, thereby ensuring good electrical connection between the two parts of the shielding box.
  • the cover 14 and the radiant element 20 are made in one part, formed by a flat plate.
  • this plate can be welded to the walls 16, 18 and 19 to form the upper part 12 of the housing. This allows easy fabrication and good dimensional accuracy of the antenna.
  • the two parts 12 and 13 could be formed by molded dielectric parts and provided with a coating metallic suitable for performing the electrical functions of the antenna and shielding.
  • the length of the radiant element 20 is chosen according to of the wavelength ⁇ of the radiation to be emitted or received and corresponds to preferably around ⁇ / 4, which is around 32 mm for the frequency of 2.45 GHz.
  • the recess 19 and the radiant element 20 extend on much less than half of the perimeter of the structure and therefore do not occupy than a small fraction of the area of the case.
  • FIG. 3 various components have been represented diagrammatically likely to be housed inside the shielding box 11, in particular a electronic clock movement 25, a Bluetooth unit 26 comprising a transceiver associated with the antenna 10, and a source of electrical energy 27 comprising for example a rechargeable battery by induction. Box 11 prevents electromagnetic interference between these components and the antenna 10.
  • the unit 26 is connected to the antenna by a coaxial line 28 whose conductor internal 28a, isolated from the ground plane, crosses the surface 18 of the housing through a orifice 29 to go to connect to the connection point 23 of the radiant element 20.
  • the external conductor 28b of the coaxial line is connected to the ground plane formed by the surface 18.
  • a hole 29 in the center of the cover 14 makes it possible to connect members display external to the clockwork movement 25 and, where appropriate, to other bodies housed inside the housing 11.
  • the antenna structure according to the present invention can take various shapes depending on the size constraints of the portable unit in which this structure is incorporated.
  • the antenna structure can thus perfectly present a substantially rectangular, elliptical or polygonal outline.
  • FIGS. 1 to 3 show in schematic perspective a timepiece is in the form of a wristwatch with analog display which contains the structure 1 illustrated in FIGS. 1 to 3.
  • the structure 1 forming an antenna 10 is thus surrounded and incorporated in an external element made of a non-material conductor, in particular a plastic material, in this case a case middle watch 30.
  • the movement of the timepiece is advantageously arranged entirely inside the structure 1.
  • the planar upper surface of the housing 11 and of the radiant element 20 can serve as a watch face or be covered with a disc of dielectric material forming a conventional dial, as desired.
  • the antenna 10 is thus located in a region of the wristwatch which is as far away from the wearer's arm as possible, minimizing arm influences on the performance of the antenna, as explained above.
  • Small diameter orifices can be provided in the housing 11 of the structure 1, without significantly affecting the characteristics of the antenna 10, for allow the passage, if necessary, of components of display elements and / or control, these elements being electrically isolated from the structure 1.
  • axes or canons of hour and minute hands 32 thus pass through the hole 29 provided in the center of the cover of the housing 11.
  • rods of various control members penetrate laterally through the wall cylindrical side of the housing 11, these control members comprising in particular a rotary rod secured to a time setting crown 34 and two push-buttons 35 and 36.
  • the structure 1 is arranged in the middle part of the watch 30 preferably of so that the radiant element 20 of the antenna 10 is located opposite the organs of control 34, 35 and 36, and generally away from any organ penetrating the inside of the structure 1 case.
  • An antenna structure according to the present invention can thus be designed to be incorporated into a timepiece, such as a watch, and to receive inside the armored box all or part of a transceiver electronics, timepiece electronics and sound movement.
  • a timepiece such as a watch
  • the applications of the invention more generally extend to any portable electronic device having a function of emission and / or reception in radio frequency.
  • the element radiant may have a more complex configuration, for example depending on the lessons from patent application EP 1 096 602, and can be short-circuited at ground plane on only part of its end linked to the housing.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
EP20010204447 2001-11-21 2001-11-21 Struktur einer PIFA-Antenne und Abschirmgehäuse für ein elektronisches tragbares Gerät Withdrawn EP1315052A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20010204447 EP1315052A1 (de) 2001-11-21 2001-11-21 Struktur einer PIFA-Antenne und Abschirmgehäuse für ein elektronisches tragbares Gerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20010204447 EP1315052A1 (de) 2001-11-21 2001-11-21 Struktur einer PIFA-Antenne und Abschirmgehäuse für ein elektronisches tragbares Gerät

Publications (1)

Publication Number Publication Date
EP1315052A1 true EP1315052A1 (de) 2003-05-28

Family

ID=8181268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010204447 Withdrawn EP1315052A1 (de) 2001-11-21 2001-11-21 Struktur einer PIFA-Antenne und Abschirmgehäuse für ein elektronisches tragbares Gerät

Country Status (1)

Country Link
EP (1) EP1315052A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2275884A3 (de) * 2009-07-14 2011-11-23 Seiko Epson Corporation Uhr mit drahtloser Kommunikationsfunktion
EP3964898A1 (de) * 2020-09-04 2022-03-09 The Swatch Group Research and Development Ltd Antennenvorrichtung für uhr
EP3968102A1 (de) * 2020-09-09 2022-03-16 The Swatch Group Research and Development Ltd Antennenvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1134837A1 (de) * 1999-09-28 2001-09-19 Seiko Epson Corporation Antennenantodnung für hf-radio,hf-radiogerät und arnbandughr-radiogerät

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1134837A1 (de) * 1999-09-28 2001-09-19 Seiko Epson Corporation Antennenantodnung für hf-radio,hf-radiogerät und arnbandughr-radiogerät

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2275884A3 (de) * 2009-07-14 2011-11-23 Seiko Epson Corporation Uhr mit drahtloser Kommunikationsfunktion
US8456959B2 (en) 2009-07-14 2013-06-04 Seiko Epson Corporation Timepiece with wireless communication function
US8665675B2 (en) 2009-07-14 2014-03-04 Seiko Epson Corporation Timepiece with wireless communication function
US9377763B2 (en) 2009-07-14 2016-06-28 Seiko Epson Corporation Timepiece with wireless communication function
EP3964898A1 (de) * 2020-09-04 2022-03-09 The Swatch Group Research and Development Ltd Antennenvorrichtung für uhr
JP2022043984A (ja) * 2020-09-04 2022-03-16 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 計時器のためのアンテナ・デバイス
JP7108085B2 (ja) 2020-09-04 2022-07-27 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 計時器のためのアンテナ・デバイス
US11695196B2 (en) 2020-09-04 2023-07-04 The Swatch Group Research And Development Ltd Antenna device for timepiece
EP3968102A1 (de) * 2020-09-09 2022-03-16 The Swatch Group Research and Development Ltd Antennenvorrichtung
US11705621B2 (en) 2020-09-09 2023-07-18 The Swatch Group Research And Development Ltd Antenna device

Similar Documents

Publication Publication Date Title
EP1093098B1 (de) Antennenstruktur die ein Gehäuse bildet für elektronische Komponente eines tragbaren Gerätes
EP0766152B1 (de) Uhr mit einer Antenne
EP1407513B1 (de) Antenne für armbanduhr
WO2005036697A1 (fr) Antenne interne de faible volume
EP1489471A1 (de) Erdung von einer gedruckten Schaltung eingestellt in einen Armband elektronischen Gerät
FR2505105A1 (fr) Bracelet radio am
EP1315234A1 (de) VHF-Empfangsantenne integriert in das Armband einer tragbaren elektronischen Vorrichtung
EP1294051A1 (de) Bauelement eines Funkkommunikationsendgerätes, das eine Antenne einen Lautsprecher und eine Klingelanläutevorrichtung bildet
FR2883671A1 (fr) Antenne ultra-large bande offrant une grande flexibilite de conception
EP0974878A1 (de) Antenne und Positionsdetektor auf einem Substrat Kombinierende Untereinheit, insbesondere für Uhrwerke
FR2844405A1 (fr) Agencement structurel pour terminal de radiocommunication comportant un haut-parleur et un ecouteur
EP1315052A1 (de) Struktur einer PIFA-Antenne und Abschirmgehäuse für ein elektronisches tragbares Gerät
EP1431847B1 (de) Tragbares elektronisches Gerät, insbesondere Uhr, mit einer Antenne, die aus einer Spule mit grossem Diameter gebildet ist
EP1378023A1 (de) Tragbares funktelefon
FR2760131A1 (fr) Ensemble d'antennes concentriques pour des ondes hyperfrequences
EP0312792A1 (de) Antenne für Miniatur-Radioempfänger im Uhrengehäuse
US20030095071A1 (en) Structure forming a PIFA antenna and a shield container in a portable electronic apparatus
EP0954051B1 (de) Schlitzantenne, insbesondere für eine Uhr
EP0860895A1 (de) Resonanzantenne zum Senden oder Empfangen polarisierter Wellen
EP0860894A1 (de) Miniatur-Resonanzantenne in Form von ringförmigen Streifenleiterantennen
EP2895871A1 (de) Vorrichtung zur messung der leistung eines elektromagnetfeldsensors
CH686696B5 (fr) Montre munie d'une antenne,notamment du type montre-bracelet.
EP3964898A1 (de) Antennenvorrichtung für uhr
JP2000353910A (ja) 腕情報機器のアンテナ構造
FR3007213A1 (fr) Procede pour radioelectrifier un objet installe dans un espace public et objet ainsi radioelectrifie.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20031128

AKX Designation fees paid

Designated state(s): CH DE FI FR GB LI NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050601