EP1257001A1 - Schnittstelle zwischen Mobilfunkgerät und Zubehörgerät basierend auf kapazitiver Kopplung zur gemeinsamen Nutzung der Masseflächen um den Antennengewinn des Zubehörgeräts zu erhöhen - Google Patents

Schnittstelle zwischen Mobilfunkgerät und Zubehörgerät basierend auf kapazitiver Kopplung zur gemeinsamen Nutzung der Masseflächen um den Antennengewinn des Zubehörgeräts zu erhöhen Download PDF

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Publication number
EP1257001A1
EP1257001A1 EP01111601A EP01111601A EP1257001A1 EP 1257001 A1 EP1257001 A1 EP 1257001A1 EP 01111601 A EP01111601 A EP 01111601A EP 01111601 A EP01111601 A EP 01111601A EP 1257001 A1 EP1257001 A1 EP 1257001A1
Authority
EP
European Patent Office
Prior art keywords
area
ground potential
accessory device
housing
mobile
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Withdrawn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
EP01111601A
Other languages
English (en)
French (fr)
Inventor
Dirk Moldenhauer
Herbert Dingfelder
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to EP01111601A priority Critical patent/EP1257001A1/de
Publication of EP1257001A1 publication Critical patent/EP1257001A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises

Definitions

  • the present invention relates to a first device having a first housing, an antenna system and a first area of ground potential, connectable to a second device having a second housing and a second area of ground potential.
  • the present invention further relates to an arrangement for receiving or transmitting radio signals, where a first device is connected to a second device and particularly where an accessory device is connected to a mobile device.
  • a mobile telephone system can be developed either by developing a new mobile device which includes both the telephone and additional functionality or by mounting a separate accessory device with additional functionality to an already existing mobile device.
  • Such an accessory device permits a higher flexibility for a user, because additional functionality can be added or removed whenever wanted. Therefore e.g. a MP3 player device can be mounted to the mobile telephone device, where an existing system connector of that mobile telephone device operates for mechanical mounting the two devices as well as for electrical connecting the two devices to share electrical resources like battery, display etc.
  • a positioning device in general consists of electrical components like e.g. a patch antenna and a related ground potential.
  • An acceptable high reception performance of the antenna requires a minimum size of the area of ground potential.
  • such a device can be made as small as the including electrical components allows it, but ignoring the size of the area of ground potential, which will be necessary to maintain a certain reception performance. Since the coupling area allows capacitive coupling of additional area of ground potential, the dimension of such a device can be independent of the necessary area of ground potential.
  • the coupling part allows easy covering of the area of ground potential from a second device. Further when the coupling area which is protruding beyond the housing is formed in respect to the shape of a part of the housing of that second device, a mechanical fixation of that first device to that second device can be achieved.
  • the invention is therefore preferably provided for an arrangement where, according to claim 11 or 12, an accessory device like e.g. a positioning terminal is coupled to a mobile device like e.g. an already existing mobile telephone terminal.
  • an accessory device like e.g. a positioning terminal is coupled to a mobile device like e.g. an already existing mobile telephone terminal.
  • the present invention allows that the dimensions of that positioning system is not determined by the needed area of ground potential to achieve a good antenna performance. Rather the necessary dimension of area of ground potential can be achieved by coupling additional area of ground potential from the existing standard mobile telephone terminal to the positioning terminal.
  • the present invention in general has the advantage that especially when a new small accessory device is created for an already existing mobile device, there are no changes necessary to the mobile device to couple additional area of ground potential from that mobile device to the accessory device.
  • a part of the housing of that mobile device e.g. the bottom of that housing, is the area of ground potential and therefore is made out of metal or laminated with a metal foil, it is only necessary to create the coupling area of that accessory device in respect to that mobile device to achieve a capacitive coupling, when both devices are connected.
  • a positioning device 100 for receiving Global Positioning System (GPS) signals is shown.
  • GPS Global Positioning System
  • a patch antenna 120 is included in a housing 110.
  • an area of ground potential 130 is used as reference for that antenna 120. Due to the fact that such an accessory device has to be as small as possible the smallest dimensions of the housing 110 are given by the included electrical components.
  • the antenna 120 and an ASIC which is not shown. But thus the available space for an area of ground potential is limited.
  • the area of ground potential is a part of the housing which form the bottom of the housing and the coupling area 131 is protruding beyond that housing 110. Therefore that part of the area of ground potential can be used as a coupling area 131, which allows a capacitive coupling of additional area of ground potential from outside of the housing 110.
  • an accessory device 100 like a GPS receiver with a housing 110 and at least an antenna 120 and an area of ground potential 130 with a coupling area 131 is shown. That positioning device 100 is connected with a mobile telephone device 200.
  • the mobile telephone device 200 is an already existing mobile phone, which has a housing 210 and a area of ground potential 230 and which has all functionality to establish a telephone call and all necessary user interfaces, like a display, keys, etc., but which are not shown here.
  • the two devices 100 and 200 are connected, e.g. by clipping the housing 110 to the housing 210 and an already existing system connector, which is not shown, of that mobile telephone device.
  • the system connector allows that e.g. the user interfaces can be shared by both devices, e.g. the positioning data calculated by the mobile positioning device 100 are provided to the user via the display of that mobile telephone system. Therefore electrical signals are transferred via that system connector and a matching system connector in that mobile positioning device 100.
  • Such a typical system connector has multiple thin pins for transferring the signals and the related signal ground, which of course can be identical to ground potential of the area of ground potential.
  • the coupling area 131 which is protruding beyond the housing 110, covers a part of the area of ground potential 230 of that mobile telephone device 200.
  • the coupling area has dimensions of around 12 by 45 mm and the airgap is around 0.1mm. Therefore a coupling between the area of ground potential of the accessory device and the mobile device with a capacitive of 47pF is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
EP01111601A 2001-05-12 2001-05-12 Schnittstelle zwischen Mobilfunkgerät und Zubehörgerät basierend auf kapazitiver Kopplung zur gemeinsamen Nutzung der Masseflächen um den Antennengewinn des Zubehörgeräts zu erhöhen Withdrawn EP1257001A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01111601A EP1257001A1 (de) 2001-05-12 2001-05-12 Schnittstelle zwischen Mobilfunkgerät und Zubehörgerät basierend auf kapazitiver Kopplung zur gemeinsamen Nutzung der Masseflächen um den Antennengewinn des Zubehörgeräts zu erhöhen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01111601A EP1257001A1 (de) 2001-05-12 2001-05-12 Schnittstelle zwischen Mobilfunkgerät und Zubehörgerät basierend auf kapazitiver Kopplung zur gemeinsamen Nutzung der Masseflächen um den Antennengewinn des Zubehörgeräts zu erhöhen

Publications (1)

Publication Number Publication Date
EP1257001A1 true EP1257001A1 (de) 2002-11-13

Family

ID=8177405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111601A Withdrawn EP1257001A1 (de) 2001-05-12 2001-05-12 Schnittstelle zwischen Mobilfunkgerät und Zubehörgerät basierend auf kapazitiver Kopplung zur gemeinsamen Nutzung der Masseflächen um den Antennengewinn des Zubehörgeräts zu erhöhen

Country Status (1)

Country Link
EP (1) EP1257001A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1447879A1 (de) * 2003-02-14 2004-08-18 Siemens Aktiengesellschaft Ein Verlängerungsstück für eine Antennengrundplatte, eine Antennengrundplatte, eine Antenne und dieselbe verwendende Vorrichtungen
US7751856B2 (en) 2003-10-28 2010-07-06 Nokia Corporation Coordination of apparatus and mobile terminal media processing circuitry

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5949369A (en) * 1996-12-30 1999-09-07 At & T Corp, Portable satellite phone having directional antenna for direct link to satellite
WO1999052175A1 (en) * 1998-04-02 1999-10-14 Allgon Ab Wide band antenna means incorporating a radiating structure having a band form
WO1999054956A2 (en) * 1998-04-20 1999-10-28 Allgon Ab Ground extension arrangement for coupling to ground means in an antenna system, and an antenna system and a mobile radio device having such ground arrangement
US6160515A (en) * 1999-06-01 2000-12-12 Motorola, Inc. Dispersive surface antenna
US6215447B1 (en) * 1998-01-16 2001-04-10 Rangestar Wireless, Inc. Antenna assembly for communications devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5949369A (en) * 1996-12-30 1999-09-07 At & T Corp, Portable satellite phone having directional antenna for direct link to satellite
US6215447B1 (en) * 1998-01-16 2001-04-10 Rangestar Wireless, Inc. Antenna assembly for communications devices
WO1999052175A1 (en) * 1998-04-02 1999-10-14 Allgon Ab Wide band antenna means incorporating a radiating structure having a band form
WO1999054956A2 (en) * 1998-04-20 1999-10-28 Allgon Ab Ground extension arrangement for coupling to ground means in an antenna system, and an antenna system and a mobile radio device having such ground arrangement
US6160515A (en) * 1999-06-01 2000-12-12 Motorola, Inc. Dispersive surface antenna

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1447879A1 (de) * 2003-02-14 2004-08-18 Siemens Aktiengesellschaft Ein Verlängerungsstück für eine Antennengrundplatte, eine Antennengrundplatte, eine Antenne und dieselbe verwendende Vorrichtungen
US7751856B2 (en) 2003-10-28 2010-07-06 Nokia Corporation Coordination of apparatus and mobile terminal media processing circuitry

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