EP0100639A2 - Dispositif de couplage pour aérien - Google Patents

Dispositif de couplage pour aérien Download PDF

Info

Publication number
EP0100639A2
EP0100639A2 EP83304287A EP83304287A EP0100639A2 EP 0100639 A2 EP0100639 A2 EP 0100639A2 EP 83304287 A EP83304287 A EP 83304287A EP 83304287 A EP83304287 A EP 83304287A EP 0100639 A2 EP0100639 A2 EP 0100639A2
Authority
EP
European Patent Office
Prior art keywords
bracelet
wrist strap
aerial
belt
coupling device
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Withdrawn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
EP83304287A
Other languages
German (de)
English (en)
Other versions
EP0100639A3 (fr
Inventor
Graham Edgar Beesley
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.)
Shaye Communications Ltd
Original Assignee
Sinclair Research Ltd
Shaye Communications Ltd
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 Sinclair Research Ltd, Shaye Communications Ltd filed Critical Sinclair Research Ltd
Publication of EP0100639A2 publication Critical patent/EP0100639A2/fr
Publication of EP0100639A3 publication Critical patent/EP0100639A3/fr
Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect

Definitions

  • This invention relates to an aerial coupling device which enables an electronic circuit, such as a radio receiver or transmitter, to be coupled to a body, particularly a part of a human body.
  • an electronic circuit such as a radio receiver or transmitter
  • One application of the invention is to a radio receiver, particularly a radio paging device, that can be worn on the person, for example, like a wristwatch.
  • the human body acts as an aerial and the invention is employed to couple radio frequency current, flowing in the body to the receiver circuitry.
  • radio paging devices of the pocket or chest type are normally carried in a pocket and/or attached to clothing by means of a clip.
  • a drawback of such devices is that the human body, being a moderate conductor, introduces a damping or loss factor which leads to a loss in signal strength. In such known devices, the proximity of the body is, therefore, a disadvantage.
  • the present invention overcomes such a problem by making use of a body as an aerial and, in effect, turning the above disadvantage into an advantage.
  • the present invention provides an aerial coupling device comprising means adapted to be worn on a body and including at least one inductive element which is located in said means so as to enable radio frequency current to be coupled either from said body to said inductive element, or from said inductive element to said body.
  • the inductive element or elements can be either provided with terminals for connection, or connected to electronic circuitry which either responds to the induced radio frequency current received from the body (in a receiver mode), or which provides radio frequency current to the body (in a transmitter mode).
  • devices employing the invention may be worn close to the body without causing any loss in signal strength.
  • This enables the invention to be advantageously embodied in various forms, for example, in a bracelet or wrist strap, belt, necklace, clothing, or spectacles, which are far less obtrusive and/or inconvenient to carry than, for example, in radio paging devices of the known pocket or chest type.
  • the body is used as an aerial, it is not necessary to provide an aerial in a device which includes or is connected to a coupling device according to the invention.
  • the aerial coupling device may provide either a broad, or a narrow transmission band for the radio frequency current.
  • a bracelet , wrist strap, or belt may support one or more inductive elements which pick up a wide band of radio frequencies (such as 20-50 Megaherz).
  • the electronic circuitry used in such a case (such as a radio receiver or transmitter) could then be provided with appropriate tuning circuits.
  • it can be advantageous to provide a narrow band (particularly for low frequencies,but possibly for frequencies in the range of from a few Megaherz to about 100 Megaherz), by using one or more electrical resonating circuits.
  • a distributed resonance arrangement comprising a plurality of parallel connected resonating circuits each having a similar inductance and capacitance will advantageously provide improved signal strength for radio receivers at the respective resonant frequency.
  • the latter arrangement is particularly useful in the receiver mode, for example, where the invention is applied to a radio paging device.
  • the use of resonance arrangements is, however, optional, since it may be possible to pick up an open circuit voltage across tne inductive element or elements.
  • an aerial coupling device comprises a bracelet or wrist strap, one or more inductive elements supported by the bracelet or wrist strap, each of said inductive elements including at least one loop or coil which is transverse to the longitudinal axis of the bracelet or wrist strap.
  • each inductive loop or coil is wound on a core made of ferrite in order to improve the signal coupling.
  • the latter embodiment of the invention may include a case attached to the bracelet or wrist strap, the case containing, for example, a radio receiver such as an FM broadcast receiver or a radio paging device.
  • a radio receiver such as an FM broadcast receiver or a radio paging device.
  • the receiver or paging device may be advantageously contained in a watch case which includes timing circuitry and a time display.
  • the paging device shown in Figs. 1 and 2 comprises a bracelet or wrist strap 1 which supports a plurality of resonating circuits 2 each including an inductive element 3 connected to a capacitor 4.
  • the required capacitance may be provided by an inherent capacitance between adjacent end portions 5a, 5b of one or more open inductive loops or coils 5, as shown in Fig. 3.
  • each inductive element preferably includes, either a single turn or multiple turns wound on a core or cores 6 made of ferrite or iron dust, for example.
  • core or cores 6 may not be necessary (e.g. when using air-cored loops or coils).
  • the resonating circuits 2 are connected in parallel and the parallel network is either provided with terminals (not shown), or connected to radio receiver circuitry 7 of a paging device, as shown in Fig. 2.
  • the circuitry includes a sound transducer 8 which provides a "bleep" or some other suitable audio signal to attract the user's attention when a predetermined radio signal is received.
  • a sound transducer 8 which provides a "bleep" or some other suitable audio signal to attract the user's attention when a predetermined radio signal is received.
  • the circuitry 7 is housed in a watch case 9 together with known timing circuitry for driving a display 10.
  • the watch circuitry is suitably of the type which includes an alarm function whereby the audio alarm transducer may be connected to the radio paging receiver circuitry. Means may be employed for providing different tones in order to enable the user to distinguish between time alarms and radio paging sounds. Alternatively or additionally, the radio paging alarm may be given by means of a flashing light.
  • the aerial coupling device (including the resonating circuits 2) and the radio receiver circuitry (7) may be incorporated into a waist belt (not shown). This provides the advantage of using the body as a dipole aerial.
  • the radio frequency may be in the range of 20 Megaherz to 1 Gigaherz and preferably about 100 Megaherz and the circuits 2 are resonant at the selected frequency.
  • the specific construction of circuits 2 and the number used will depend on the selected frequency. For example, fewer resonating circuits 2 each having one loop or coil may be used at higher frequencies, whereas more resonating circuits possibly having . more than one loop or coil wound on ferrite cores will be required at lower frequencies.
  • Separate ferrite cores may be provided for each respective resonating circuit or the loops or coils of each resonating circuit may be wound in a common ferrite core.
  • Fig. 2 schematically shows how the resonating circuits are connected in parallel, the parallel network being connected to a signal input lla, llb, of receiver circuitry 7.
  • the radio frequency current flowing in the wrist inducesa secondary current in the loops or coils of the inductive elements 2 in the resonating circuits 2 which are close to the wrist. That is the wrist, arm and body act as an aerial and the aerial coupling device acts as a transformer for coupling the currents in the aerial. Efficient coupling to the wrist current is achieved by using many small loops or coils running in the direction of the arm (i.e.
  • each inductive element 3 is parallel resonated before coupling to the next.
  • the inductive elements 3 are symbolically represented in Fig. 2, since each may have one or more loops or coils which may be wound on a core (e.g. made of ferrite).
  • a core e.g. made of ferrite.
  • the inductive elements 3 are represented by only one loop or coil, and the capacitance by the standard symbol.
  • the aerial coupling circuit may be used with other electronic circuitry.
  • an FM broadcast receiver may be coupled to the body to receive broadcast transmissions, or a low power transmitter may be coupled to the body in order to radiate a radio signal.
  • the latter device may be used for telecommunication or position monitoring and, in this case, the body may be that of an animal (e.g. which is free to roam on open pasture land).
  • the resonating circuits 2 are preferably evenly spaced around the bracelet or wrist strap 1 and they may, for example, be incorporated in each link of an expanding watch bracelet.
  • the capacitance(2) required for the resonating circuits may be built into, or be part of a receiver or transmitter which is housed, for example, in the watch case 9.
  • the inductive element(s) e.g. the loop(s) or coil(s) extend generally parallel to the main current flow in the body member in which it (they) is/are wom. This means that in a strap worn round a body or body member, they would be located transverse to the longitudinal direction of the strap.

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  • Electric Clocks (AREA)
EP83304287A 1982-08-02 1983-07-25 Dispositif de couplage pour aérien Withdrawn EP0100639A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8222262 1982-08-02
GB8222262 1982-08-02

Publications (2)

Publication Number Publication Date
EP0100639A2 true EP0100639A2 (fr) 1984-02-15
EP0100639A3 EP0100639A3 (fr) 1986-03-05

Family

ID=10532061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83304287A Withdrawn EP0100639A3 (fr) 1982-08-02 1983-07-25 Dispositif de couplage pour aérien

Country Status (1)

Country Link
EP (1) EP0100639A3 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4754285A (en) * 1987-05-01 1988-06-28 Timex Corporation Expansion band antenna for a wristwatch application
EP0279054A1 (fr) * 1987-01-28 1988-08-24 Timex Corporation Bracelet flexible pour montre à antenne incorporée et procédé pour sa fabrication
US4817196A (en) * 1987-01-02 1989-03-28 Motorola, Inc. Apparatus for tuning the antenna of a miniature personal communications device
US4873527A (en) * 1988-01-07 1989-10-10 Motorola, Inc. Antenna system for a wrist carried paging receiver
EP0348636A1 (fr) * 1988-05-27 1990-01-03 Junghans Uhren Gmbh Petite antenne pour une montre commandée par radio
US4916439A (en) * 1987-01-05 1990-04-10 Eac Technologies Corp. Remote display arrangement for appliances
WO1990008403A1 (fr) * 1989-01-18 1990-07-26 At&E Corporation Bracelet de montre reglable a antenne incorporee
US4977614A (en) * 1989-10-23 1990-12-11 Motorola, Inc. Wristband with loop antenna
EP0443491A1 (fr) * 1990-02-20 1991-08-28 Nippon Telegraph And Telephone Corporation Récepteur en forme de montre-bracelet
US5132697A (en) * 1990-07-27 1992-07-21 Motorola, Inc. Insulated clasp for a wrist band loop antenna
US5134418A (en) * 1990-06-04 1992-07-28 Motorola, Inc. Apparatus for sensing the integrity of a wristband antenna
US5159713A (en) * 1985-11-27 1992-10-27 Seiko Corp. Watch pager and wrist antenna
US5410749A (en) * 1992-12-09 1995-04-25 Motorola, Inc. Radio communication device having a microstrip antenna with integral receiver systems
US5986566A (en) * 1994-08-18 1999-11-16 Oi Denki Co., Ltd. Wrist band antenna
US20160035164A1 (en) * 2014-07-29 2016-02-04 Hon Hai Precision Industry Co., Ltd. Wearable portable electronic device
CN107111279A (zh) * 2014-09-12 2017-08-29 吉欧塞提斯公司 连接手环

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470687A (en) * 1948-03-19 1949-05-17 Orrin G Cafrella Antenna belt and radio receiver
US3098231A (en) * 1960-07-18 1963-07-16 Mosley Electronics Inc Multiple frequency antenna system
DE1272384B (de) * 1963-10-31 1968-07-11 Funke Huster Elektrizitaets Rahmenantenne fuer ein tragbares Sprechgeraet, insbesondere fuer Untertagebetriebe
US3902118A (en) * 1974-04-04 1975-08-26 Us Army Body-coupled portable transmitter
DE2938584A1 (de) * 1979-09-24 1981-04-09 Battelle-Institut E.V., 6000 Frankfurt Verfahren zur auffindung von verschuetteten
JPS56169401A (en) * 1980-05-31 1981-12-26 Shuichi Sakai Antenna for wrist watch type receiver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470687A (en) * 1948-03-19 1949-05-17 Orrin G Cafrella Antenna belt and radio receiver
US3098231A (en) * 1960-07-18 1963-07-16 Mosley Electronics Inc Multiple frequency antenna system
DE1272384B (de) * 1963-10-31 1968-07-11 Funke Huster Elektrizitaets Rahmenantenne fuer ein tragbares Sprechgeraet, insbesondere fuer Untertagebetriebe
US3902118A (en) * 1974-04-04 1975-08-26 Us Army Body-coupled portable transmitter
DE2938584A1 (de) * 1979-09-24 1981-04-09 Battelle-Institut E.V., 6000 Frankfurt Verfahren zur auffindung von verschuetteten
JPS56169401A (en) * 1980-05-31 1981-12-26 Shuichi Sakai Antenna for wrist watch type receiver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 55 (E-101)[933], 10th April 1982; & JP-A-56 169 401 (SHIYUUICHI SAKAI) 26-12-1981 *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159713A (en) * 1985-11-27 1992-10-27 Seiko Corp. Watch pager and wrist antenna
US4817196A (en) * 1987-01-02 1989-03-28 Motorola, Inc. Apparatus for tuning the antenna of a miniature personal communications device
US4916439A (en) * 1987-01-05 1990-04-10 Eac Technologies Corp. Remote display arrangement for appliances
EP0279054A1 (fr) * 1987-01-28 1988-08-24 Timex Corporation Bracelet flexible pour montre à antenne incorporée et procédé pour sa fabrication
EP0288676A2 (fr) * 1987-05-01 1988-11-02 Timex Corporation Bande extensible à antenne pour application dans une montre-bracelet
EP0288676A3 (fr) * 1987-05-01 1989-09-20 Timex Corporation Bande extensible à antenne pour application dans une montre-bracelet
US4754285A (en) * 1987-05-01 1988-06-28 Timex Corporation Expansion band antenna for a wristwatch application
US4873527A (en) * 1988-01-07 1989-10-10 Motorola, Inc. Antenna system for a wrist carried paging receiver
US4947179A (en) * 1988-05-27 1990-08-07 Junghans Uhren Gmbh Antenna for a radio controlled timepiece
EP0348636A1 (fr) * 1988-05-27 1990-01-03 Junghans Uhren Gmbh Petite antenne pour une montre commandée par radio
WO1990008403A1 (fr) * 1989-01-18 1990-07-26 At&E Corporation Bracelet de montre reglable a antenne incorporee
US4977614A (en) * 1989-10-23 1990-12-11 Motorola, Inc. Wristband with loop antenna
US5136303A (en) * 1990-02-20 1992-08-04 Nippon Telegraph And Telephone Corporation Wrist watch type receiver
EP0443491A1 (fr) * 1990-02-20 1991-08-28 Nippon Telegraph And Telephone Corporation Récepteur en forme de montre-bracelet
US5134418A (en) * 1990-06-04 1992-07-28 Motorola, Inc. Apparatus for sensing the integrity of a wristband antenna
US5132697A (en) * 1990-07-27 1992-07-21 Motorola, Inc. Insulated clasp for a wrist band loop antenna
US5410749A (en) * 1992-12-09 1995-04-25 Motorola, Inc. Radio communication device having a microstrip antenna with integral receiver systems
US5986566A (en) * 1994-08-18 1999-11-16 Oi Denki Co., Ltd. Wrist band antenna
US6329903B1 (en) * 1994-08-18 2001-12-11 Oi Denki Co., Ltd. Wrist watch-style pager
US20160035164A1 (en) * 2014-07-29 2016-02-04 Hon Hai Precision Industry Co., Ltd. Wearable portable electronic device
CN107111279A (zh) * 2014-09-12 2017-08-29 吉欧塞提斯公司 连接手环
CN107111279B (zh) * 2014-09-12 2019-12-17 吉欧塞提斯公司 连接手环

Also Published As

Publication number Publication date
EP0100639A3 (fr) 1986-03-05

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Inventor name: BEESLEY, GRAHAM EDGAR