EP0805507B1 - Empfangs- und/oder Sendeeinrichtung für Funksprüche mit einer induktiven und kapazitiven Antenne - Google Patents

Empfangs- und/oder Sendeeinrichtung für Funksprüche mit einer induktiven und kapazitiven Antenne Download PDF

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Publication number
EP0805507B1
EP0805507B1 EP97106490A EP97106490A EP0805507B1 EP 0805507 B1 EP0805507 B1 EP 0805507B1 EP 97106490 A EP97106490 A EP 97106490A EP 97106490 A EP97106490 A EP 97106490A EP 0805507 B1 EP0805507 B1 EP 0805507B1
Authority
EP
European Patent Office
Prior art keywords
antenna
plates
coil
magnetic component
electromagnetic field
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
EP97106490A
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English (en)
French (fr)
Other versions
EP0805507A1 (de
Inventor
Teodoridis Viron
Felix Gassmann
Francesco Spina
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.)
ETA SA Manufacture Horlogere Suisse
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
Eta SA Fabriques dEbauches
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 Ebauchesfabrik ETA AG, Eta SA Fabriques dEbauches filed Critical Ebauchesfabrik ETA AG
Publication of EP0805507A1 publication Critical patent/EP0805507A1/de
Application granted granted Critical
Publication of EP0805507B1 publication Critical patent/EP0805507B1/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

Definitions

  • the present invention relates to a device for reception and / or transmission of radio broadcast messages portable which includes an antenna capable of picking up a field electromagnetic carrying radio messages.
  • the first element of the antenna forms, on the one hand, with the second conductive element a capacitive doublet sensitive to an electrical component of the field electromagnetic carrying broadcast radio messages.
  • the first element makes it possible to form a loop sensitive to a magnetic component of the field electromagnetic. So we can say that the antenna has a mixed electrical and magnetic aspect because it is sensitive to both electrical components and magnetic field of the electromagnetic field.
  • the two conductive elements are arranged in planes parallel to the dial of the case. Therefore, the loop formed by the first element captures the component radial magnetic of the electromagnetic field with respect on the user's wrist and the capacitive doublet formed by the two conductive elements picks up the component electric radial of the electromagnetic field with respect on the user's wrist.
  • the object of the present invention is a device for reception of portable radio messages which remedies at least in part to these disadvantages.
  • Another object of the invention is a device for reception of portable radio broadcast messages including antenna gain / bandwidth product is optimized.
  • Another object of the invention is a device for reception of portable radio messages which allows regular behavior as a function of the frequency of electromagnetic field received.
  • the object of the invention is a device for reception of portable radio messages which includes a single antenna and whose construction is simple and space-saving.
  • the subject of the invention is therefore a device for reception and / or transmission of radio broadcast messages portable intended to be worn on a part of the body having the shape of a cylinder such as the arm or the trunk of this body.
  • the device comprises a housing, a antenna capable of picking up both a magnetic component and an electrical component of an electromagnetic field carrier of broadcast radio messages, and a micro-receiver receiving messages received by the antenna.
  • the antenna has two conductive plates arranged so as to capture the radial electric component of the field electromagnetic with respect to the body.
  • the antenna is formed by a coil comprising a coil arranged in the case to pick up the azimuthal magnetic component of the electromagnetic field around said part of the body.
  • the plates are part of the coil.
  • the present invention makes it possible to make a device for receiving radio broadcast messages portable whose antenna picks up the components electric radial and azimuthal magnetic of a field electromagnetic, which, on the one hand, increases the antenna performance and, on the other hand, makes the antenna less sensitive to variations in field frequency electromagnetic sensed.
  • a capacitive antenna is in the form of two electrodes separated by a dielectric and an inductive antenna in the form of a coil.
  • dielectric it should be understood here a insulating material separating the two electrodes, this matter can also be air.
  • the polarization of the electrical component captured from the incident field is perpendicular to the electrodes of the capacitive antenna while the polarization of the magnetic component received from the incident field is parallel to the axis of the inductive antenna coil.
  • the present invention relates to a device of reception intended to be worn on a part of the body of a user, it is important to know the influence of this body on the configuration of the field electromagnetic.
  • the amplitude and the direction of the electromagnetic field are strongly modified in the vicinity of the body, this being due mainly to the fact that the dielectric properties of human body are very different from air.
  • Figure 1 shows a forearm 1 of a user wearing a receiving device according to the invention which is in the form of a wristwatch 4 comprising a case 2 and a strap 3.
  • a case 2 act the two predominant components E r (radial electrical components) and H ⁇ (azimuthal magnetic component).
  • Figure 2 shows a human figure carrying a portable receiving device 5 comprising a housing 6 attached to a belt 7. On this portable receiving device 5 also act the radial electrical component E r and the azimuthal magnetic component H ⁇ of a field electromagnetic carrying radio broadcast messages.
  • FIG. 3 there is a schematic view of a portable receiving device 10 according to the invention which comprises a housing 11, a single antenna 12 adapted to receive both the azimuthal magnetic components H ⁇ and electrical radial E r of an electromagnetic field carrying broadcast radio messages and a microreceptor 13 receiving the messages picked up by the antenna to transform these messages into data perceptible by the user of the portable reception device.
  • the latter is carried by the user so that the housing is close to its body 14.
  • the antenna 12 comprises two conductive plates 15 and 16 placed substantially parallel to one another and separated by air or any other dielectric.
  • the plates 15 and 16 are arranged in the housing 11 to capture the radial electrical component E r of the electromagnetic field with respect to the body 14.
  • the plates 15 and 16 are preferably mounted in the housing 11 so that they are substantially parallel to the surface of the user's skin in front of the portable receiving device when the latter is worn by the user.
  • the antenna 12 is constituted by a coil 17 comprising, in this example, a single turn disposed in the housing 11 for picking up the azimuthal magnetic component H ⁇ of the electromagnetic field around the body 14.
  • the antenna is mounted in the housing 11 so that the longitudinal axis of the coil is substantially perpendicular to the surface of the user's skin in front of the portable receiving device, and arranged perpendicular to the longitudinal axis of the cylindrical part of the body in question, when this device is worn by the user.
  • the plates 15 and 16 form part of the coil 17.
  • the portable reception device 10 comprises a single antenna 12 which takes advantage of two predominant components of the electromagnetic field carrying radio broadcast messages, namely the radial electrical component E r and the azimuthal magnetic component H ⁇ . By allowing the use of these two components at the same time, the efficiency of the antenna is increased.
  • the plates 15 and 16 include connection zones 21 to 24 through which they are connected to the remaining part of the coil 17.
  • the zones connection points 21 and 22 are arranged in places diametrically opposed on the plate 15.
  • the connection zones 23 and 24 are arranged at the locations diametrically opposed on the plate 16.
  • the connection areas 21 to 24 are arranged in a periphery region of the plates 15 and 16. The resulting arrangement is simple, efficient and allows to form an antenna which has dimensions electromagnetic in relation to dimensions body 11.
  • the coil 17 is preferably arranged in the housing so that its longitudinal axis is substantially parallel to the azimuthal magnetic component H ⁇ when said device is worn by a user.
  • the two conductive plates are arranged so that they are substantially perpendicular to the radial electrical component E r when said device is worn by the user.
  • the portable reception device is well suited to various applications in all frequency bands because the antenna has very little practical limitation of minimum or maximum frequency. Indeed, even under the hypothesis of a reduction in the effect of the human body for the azimuthal magnetic component H ⁇ at low frequency, there is no corresponding frequency limitation for the radial electrical component E r , even at a frequency of 0 Hz.
  • the microreceptor 13 receives the messages picked up by the antenna to transform these messages into data noticeable by the user.
  • the microreceptor 13 has an adaptation circuit and agree 18 which, in known manner, makes it possible to complete the tuning of the resonant circuit which constitutes the antenna 12 and adjust if necessary the resonant frequency of it.
  • the antenna 12 can easily be adapted so that it works as a broadband antenna in a desired frequency range. To do this, it suffices that the matching and tuning circuit 18 is set so that the narrow band around the resonant frequency of the antenna is set outside of this desired frequency range. Thus, the antenna may have regular behavior as a function of the frequency in this frequency range.
  • the antenna can also be used like a resonant antenna by adjusting the circuit adaptation and agree 18 so that the frequency of antenna resonance be brought in the range of desired frequency.
  • Each of the charging circuits Z1 and Z2 can be consisting simply of a conductive element to minimum resistance forming the remaining part of the coil 18, and / or by resistive, capacitive elements and / or inductive, such as, for example, the circuit adaptation and agreement 18 which constitutes the circuit of load Z1 in the antenna 12 shown in FIG. 3.
  • Each load circuits Z1 and Z2 can even be constituted by a short circuit or an open circuit.
  • a current i is induced in the coil 17 by the azimuthal magnetic component H ⁇ (leaving the page in Figure 3) of the electromagnetic field picked up by the coil 12.
  • the current i rotates in the direction counterclockwise. This results in a positive induced voltage V H1 through the charge circuit Z1 and a negative induced voltage V H2 through the charge circuit Z2.
  • FIG 4 shows an embodiment of the plates conductors 15 and 16 as well as the microreceptor 13 of the figure 3.
  • Each of the two plates can have one or several openings, such as the central opening 20.
  • the plate 15 is arranged in the upper part of the housing 11 of the portable receiving device 10 while that the plate 16, for its part, is arranged in the lower part of the housing 11.
  • the Figure 5 shows a sectional view of a portable reception in the form of a wristwatch 30.
  • the latter comprises a dial 40 and a movement 41 housed in a housing 42.
  • the antenna arranged in this watch 30 has a first conductive plate 31 and a second conductive plate 32.
  • the upper plate 31 has the same shape as that shown in Figure 4 so that it is hidden from view by a annular part 43 of the housing 42.
  • the plate 31 shown at Figure 5 consists of a metallization ice peripheral 33.
  • the plate 32 can be a metallic bottom which is entirely metallic or, as shown in figure 5, a metal sheet affixed to a background 34 of material plastic.
  • plates 31 and 32 can be mounted in the receiving device 30 according to several variants.
  • at least one of the plates could also be deposited on the dial or any other element from the portable receiving device 30 or it could even constitute this element itself.
  • At least one of plates could also be embedded in the bottom of the box 42 or in any other part of the device portable reception 30.
  • plates 31 and 32 can be produced according to several variants.
  • at least one of plates could consist of a metallic deposit, by a conductive element produced separately or by a wire rack.
  • the plates 31 and 32 are supported on a middle part 44 made of insulating material. Plates 31 and 32 are connected to the input of the microreceptor 18 which is mounted in the housing 42 between the dial 33 and the bottom 34.
  • Figure 6 shows a sectional view of a second embodiment of a portable receiving device in the form of a wristwatch 50.
  • the latter comprises the dial 40, the movement 41 and the microreceptor 13, shown in Figure 5, which are housed in a housing 51.
  • the antenna has two conductive plates which are not not necessarily planar, i.e. a first plate conductive 52 and a second conductive plate 53 which constitute respectively an upper part and a lower part of the housing 51.
  • the plates 52 and 53 are separated by an annular disc 54 made of material insulating.
  • This arrangement makes it possible to increase the yield of the antenna because the plates 52 and 53 have a surface maximum in relation to the dimensions of the portable reception 50 itself.
  • the two plates 52 and 53 constitute parts of the housing 51.
  • only one of the plates could be formed by a part of the housing in another embodiment.
  • the embodiments described above mainly concern a device portable reception in the form of a wristwatch
  • the principle of this antenna can also be used for other watchmaking applications or for devices conventional portable reception systems.

Landscapes

  • Details Of Aerials (AREA)
  • Electric Clocks (AREA)
  • Support Of Aerials (AREA)
  • Burglar Alarm Systems (AREA)
  • Transmitters (AREA)
  • Near-Field Transmission Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Transceivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Claims (7)

  1. Tragbare Vorrichtung zum Empfangen und/oder Senden von Funknachrichten, die dazu bestimmt ist, an einem Körperteil getragen zu werden, der eine zylindrische Form aufweist, etwa am Arm oder am Rumpf dieses Körpers, wobei die Vorrichtung umfaßt:
    ein Gehäuse (11; 42; 51),
    eine Antenne (12; 31, 32; 52, 53), die zugleich eine magnetische Komponente und eine elektrische Komponente eines elektromagnetischen Feldes, das Träger für Funknachrichten ist, auffangen kann, und
    einen Mikroempfänger (13), der die von der Antenne aufgefangenen Nachrichten empfängt,
       wobei die Antenne zwei leitende Platten (15, 16; 31, 32; 52, 53) umfaßt, die in der Weise angeordnet sind, daß sie die radiale elektrische Komponente (Er) des elektromagnetischen Feldes in bezug auf den Körper auffangen,
       dadurch gekennzeichnet, daß die Antenne (12; 31, 32; 52, 53) aus einer Spule (17) gebildet ist, die eine im Gehäuse (11; 42; 51) angeordnete Windung zum Auffangen der magnetischen Azimut-Komponente (H) des elektromagnetischen Feldes um das Körperteil umfaßt, und daß die Platten (15, 16; 31, 32; 52, 53) einen Teil der Spule (17) bilden.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jede der Platten (15, 16; 31, 32; 52, 53) diametral gegenüberliegende Anschlußzonen (21-24) umfaßt, über die sie mit dem restlichen Teil der Spule (17) verbunden ist.
  3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Anschlußzonen (21-24) in einem Umfangsbereich der Platten (15, 16; 31, 32; 52, 53) angeordnet sind.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Spule (17) in dem Gehäuse (11; 42; 51) in der Weise angeordnet ist, daß ihre Längsachse zu der magnetischen Azimut-Komponente (H) im wesentlichen parallel ist, wenn die Vorrichtung getragen wird.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Antenne außerdem wenigstens eine Ladeschaltung (Z1, Z2) umfaßt, die die Platten verbindet, und daß der Mikroempfänger (13) mit der Spule (17) über die Ladeschaltung (Z1) verbunden ist, über die die von der magnetischen Azimut-Komponente (H) und von der elektrischen radialen Komponente (Er) induzierten Spannungen addiert werden.
  6. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die Vorrichtung dazu bestimmt ist, elektromagnetische Felder in einem bestimmten Frequenzbereich aufzufangen, dadurch gekennzeichnet, daß der Mikroempfänger eine Anpassungs- und Abstimmschaltung (18) umfaßt, die in der Weise geregelt wird, daß ein schmales Band um die Resonanzfrequenz der Antenne (12) außerhalb dieses bestimmten Frequenzbereichs liegt.
  7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie die Form einer Armbanduhr aufweist.
EP97106490A 1996-05-03 1997-04-18 Empfangs- und/oder Sendeeinrichtung für Funksprüche mit einer induktiven und kapazitiven Antenne Expired - Lifetime EP0805507B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605571 1996-05-03
FR9605571A FR2748360B1 (fr) 1996-05-03 1996-05-03 Dispositif de reception et/ou d'emission de messages radio-diffuses portatif comportant une antenne inductive et capacitive

Publications (2)

Publication Number Publication Date
EP0805507A1 EP0805507A1 (de) 1997-11-05
EP0805507B1 true EP0805507B1 (de) 2002-07-24

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Application Number Title Priority Date Filing Date
EP97106490A Expired - Lifetime EP0805507B1 (de) 1996-05-03 1997-04-18 Empfangs- und/oder Sendeeinrichtung für Funksprüche mit einer induktiven und kapazitiven Antenne

Country Status (12)

Country Link
US (1) US5907522A (de)
EP (1) EP0805507B1 (de)
JP (1) JPH1056312A (de)
KR (1) KR970077817A (de)
CN (1) CN1108689C (de)
AT (1) ATE221261T1 (de)
AU (1) AU715114B2 (de)
CA (1) CA2203976A1 (de)
DE (1) DE69714132T2 (de)
FR (1) FR2748360B1 (de)
SG (1) SG54494A1 (de)
TW (1) TW333717B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
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US6448886B2 (en) 1998-08-14 2002-09-10 3M Innovative Properties Company Application for radio frequency identification systems
US6600420B2 (en) 1998-08-14 2003-07-29 3M Innovative Properties Company Application for a radio frequency identification system
US6646554B1 (en) 1998-06-08 2003-11-11 3M Innovative Properties Company Identification tag with enhanced security
US7044373B1 (en) 1998-08-14 2006-05-16 3M Innovative Properties Company Radio frequency identification systems applications

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US6424262B2 (en) 1998-08-14 2002-07-23 3M Innovative Properties Company Applications for radio frequency identification systems
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CA2397317C (en) * 2000-01-13 2009-04-14 Phonak Ag Hearing aid remote control and a hearing aid with a remote control of this type
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US20040069851A1 (en) * 2001-03-13 2004-04-15 Grunes Mitchell B. Radio frequency identification reader with removable media
US7588185B2 (en) 2001-06-07 2009-09-15 3M Innovative Properties Company RFID data collection and use
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JP5854856B2 (ja) * 2012-01-24 2016-02-09 三菱電機株式会社 プラント運転装置及びプラント運転訓練シミュレータ装置
US9819075B2 (en) * 2014-05-05 2017-11-14 Nxp B.V. Body communication antenna
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US10009069B2 (en) * 2014-05-05 2018-06-26 Nxp B.V. Wireless power delivery and data link
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US9819395B2 (en) * 2014-05-05 2017-11-14 Nxp B.V. Apparatus and method for wireless body communication
US10014578B2 (en) * 2014-05-05 2018-07-03 Nxp B.V. Body antenna system
JP6668627B2 (ja) * 2015-07-16 2020-03-18 カシオ計算機株式会社 アンテナおよび時計
US10623112B2 (en) * 2015-08-24 2020-04-14 The Regents Of The University Of California Low power magnetic field body area network
US9819097B2 (en) 2015-08-26 2017-11-14 Nxp B.V. Antenna system
US10320086B2 (en) 2016-05-04 2019-06-11 Nxp B.V. Near-field electromagnetic induction (NFEMI) antenna
CN109390675B (zh) * 2017-08-03 2024-09-13 泰科电子(上海)有限公司 天线、发射装置、接收装置和无线通信系统
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6646554B1 (en) 1998-06-08 2003-11-11 3M Innovative Properties Company Identification tag with enhanced security
US6448886B2 (en) 1998-08-14 2002-09-10 3M Innovative Properties Company Application for radio frequency identification systems
US6486780B1 (en) 1998-08-14 2002-11-26 3M Innovative Properties Company Applications for radio frequency identification systems
US6600420B2 (en) 1998-08-14 2003-07-29 3M Innovative Properties Company Application for a radio frequency identification system
US6768419B2 (en) 1998-08-14 2004-07-27 3M Innovative Properties Company Applications for radio frequency identification systems
US7044373B1 (en) 1998-08-14 2006-05-16 3M Innovative Properties Company Radio frequency identification systems applications
US7270268B2 (en) 1998-08-14 2007-09-18 3M Innovative Properties Company Radio frequency identification systems applications
US8006902B2 (en) 1998-08-14 2011-08-30 3M Innovative Properties Company Radio frequency identification systems applications

Also Published As

Publication number Publication date
FR2748360A1 (fr) 1997-11-07
EP0805507A1 (de) 1997-11-05
AU1785797A (en) 1997-11-06
JPH1056312A (ja) 1998-02-24
DE69714132D1 (de) 2002-08-29
SG54494A1 (en) 1998-11-16
TW333717B (en) 1998-06-11
CA2203976A1 (en) 1997-11-03
KR970077817A (ko) 1997-12-12
CN1108689C (zh) 2003-05-14
HK1010293A1 (en) 1999-06-17
DE69714132T2 (de) 2003-03-27
AU715114B2 (en) 2000-01-20
ATE221261T1 (de) 2002-08-15
US5907522A (en) 1999-05-25
CN1179663A (zh) 1998-04-22
FR2748360B1 (fr) 1998-06-26

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