EP1508937A1 - Disposition des composants d'un système d'antenne - Google Patents

Disposition des composants d'un système d'antenne Download PDF

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Publication number
EP1508937A1
EP1508937A1 EP03077636A EP03077636A EP1508937A1 EP 1508937 A1 EP1508937 A1 EP 1508937A1 EP 03077636 A EP03077636 A EP 03077636A EP 03077636 A EP03077636 A EP 03077636A EP 1508937 A1 EP1508937 A1 EP 1508937A1
Authority
EP
European Patent Office
Prior art keywords
antenna
antenna element
component
portable communication
communication 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Withdrawn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
EP03077636A
Other languages
German (de)
English (en)
Inventor
Bo Lindell
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.)
Sony Mobile Communications AB
Original Assignee
Sony Ericsson Mobile Communications 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 Sony Ericsson Mobile Communications AB filed Critical Sony Ericsson Mobile Communications AB
Priority to EP03077636A priority Critical patent/EP1508937A1/fr
Priority to PCT/EP2004/008891 priority patent/WO2005018044A1/fr
Priority to US10/568,395 priority patent/US7250911B2/en
Priority to CN2004800239178A priority patent/CN1839513B/zh
Publication of EP1508937A1 publication Critical patent/EP1508937A1/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Withdrawn legal-status Critical Current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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • 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
    • H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration

Definitions

  • the present invention relates to the field of antennas and more particularly to a portable communication device with an antenna arrangement provided inside the casing of the device.
  • WO-0237600 One type of such in-built antenna arrangement is described in WO-0237600.
  • a cellular phone having an antenna arrangement provided within the casing of the phone is described.
  • the antenna arrangement is made up of a first antenna element in the form of the shielding, casing or chassis of the phone and is fed against a second antenna element functioning as a counterpoise provided at one end of the first antenna element.
  • the present invention is directed towards solving the problem of providing a portable communication device having an in-built antenna arrangement, where some types of components can receive a placing in close proximity of the antenna arrangement without seriously hampering the functioning of the component or the antenna arrangement and enabling the provision of the component without shielding.
  • the object of the present invention is thus to provide a portable communication device having an in-built antenna arrangement, where some types of components can receive a placing in close proximity of the antenna arrangement without seriously hampering the functioning of the component and the antenna arrangement and enabling the provision of the component without shielding.
  • a portable communication device comprising:
  • a second aspect of the present invention is directed towards a portable communication device including the features of the first aspect, wherein the first antenna element extends along most of the width of the device.
  • a third aspect of the present invention is directed towards a portable communication device including the features of the first aspect, wherein the first antenna element has a flat shape, preferably provided in a layer of the main circuit board of the device.
  • a fourth aspect of the present invention is directed towards a portable communication device including the features of the first aspect, wherein the second antenna element is in the form of an elongated body stretching essentially along a side of the first antenna element.
  • a fifth aspect of the present invention is directed towards a portable communication device including the features of the fourth aspect, wherein the first antenna element is joined with the second antenna element at a first end of said side, thereby providing a gap between the first and second antenna elements, the length of which is essentially defined by the length of the side of the first antenna element and the length of the second antenna element.
  • a sixth aspect of the present invention is directed towards a portable communication device including the features of the fifth aspect, wherein the radio circuit is connected between the first and second antenna element between the first and a second end at said side.
  • a seventh aspect of the present invention is directed towards a portable communication device including the features of the first aspect, wherein the component is unscreened.
  • An eighth aspect of the present invention is directed towards a portable communication device including the features of the first aspect, wherein the component is a further antenna for a separate type of communication, preferably a positioning antenna for receiving position information, for instance via satellite.
  • a ninth aspect of the present invention is directed towards a portable communication device including the features of the eighth aspect, wherein the component is placed orthogonally to the first antenna element so that the antenna currents of the component are orthogonal to the antenna currents on at least the first antenna element.
  • a tenth aspect of the present invention is directed towards a portable communication device including the features of the ninth aspect, wherein the component is placed at an end of the first antenna element furthest from the second antenna element.
  • An eleventh aspect of the present invention is directed towards a portable communication device including the features of the ninth aspect, wherein the component is placed on the second antenna element.
  • a twelfth aspect of the present invention includes the features of the eleventh aspect, wherein the component is placed on a part of the second antenna element that is perpendicular to the first antenna element.
  • a thirteenth aspect of the present invention includes the features of the eleventh aspect, wherein the second antenna element serves as ground plane for the component.
  • a fourteenth aspect of the present invention includes the features of the first aspect, wherein the component is placed on the second antenna element.
  • a fifteenth aspect of the present invention includes the features of the fourteenth aspect, wherein the first antenna element is provided in a layer of the main circuit board of the device and the leads to the component are provided in another layer and provided to the component via the connection between the first and second antenna elements.
  • a sixteenth aspect of the present invention includes the features of the first aspect, wherein the radio circuit includes at least one tuning network for tuning the antenna to one or more frequency bands.
  • a seventeenth aspect of the present invention includes the features of the first aspect, in which the device is a cellular phone.
  • the invention has the following advantages.
  • the antenna arrangement provides good wideband properties while still allowing the device to be small in size. It allows placing of components that are mildly sensitive to radiation without shielding close to antenna elements in the device, which lowers the complexity of the construction and also the cost of the device. This placing also enables the manufacturing of a slimmer device.
  • the device according to the ninth aspect furthermore reduces the coupling between the component, if this is another type of antenna, and the antenna arrangement, which is advantageous if the component is to receive weak signals for example from a satellite. In the device according to the thirteenth aspect there is no need to provide an extra ground plane for the component, since the second antenna element provides this.
  • the portable communication device can be another type of device though, like a cordless phone, a communication module, a PDA or any other type of portable device communicating with radio waves.
  • Fig. 1 schematically shows a front view of a cellular phone 10 according to the invention.
  • the phone 10 includes a display 12 and a keypad 14 provided on a casing 16 of the phone.
  • a display 12 and a keypad 14 provided on a casing 16 of the phone.
  • the antenna is in-built.
  • Fig. 2 schematically shows a top view of an antenna arrangement provided for communication in at least one radio frequency band, for instance the GSM band, which arrangement is provided in the interior of the casing 16 of the phone.
  • the antenna arrangement includes a first antenna element 18, which is formed like a plate and stretches inside most of the length of the phone and essentially along the whole width of the phone. This element 18 is preferably provided as a layer in the main circuit board of the phone.
  • the arrangement also includes first a second, also plate shaped, antenna element 20 provided at a top side of the phone casing 16.
  • the second antenna element 20 has an elongated shape stretching along the top side of the phone casing 16 as well as along the top side of the first antenna element 18, so that the second antenna element 20 essentially has the same length as the first antenna element 18 is wide.
  • the two antenna elements are joined together at a first end of said top side of the casing 16 and of the top side of the first antenna element 18 but otherwise spaced apart such that a gap d is defined between them.
  • the antenna elements are not joined to each other, such that the gap stretches inwards up to the point where the first and second antenna elements are joined close to the first end. It is important to point out that with a gap is meant a space where no conducting elements are placed. Different isolators or plastic material can however be placed here.
  • the second antenna element 20 is thus provided near the feed end of the first antenna element 18.
  • the radio circuit 22 is provided on the main circuit board, i.e. on the first antenna element 18.
  • the radio circuit 22 feeds the main circuit board as antenna using the second antenna element 24 as counterpoise within a certain frequency band of a number of bands used by the phone. For this reason the radio circuit includes tuning filters. How this feeding can be done is disclosed in more detail in WO-0237600, which is herein incorporated by reference.
  • the circuit board can have a length approaching a half wavelength at the operating frequency band (e.g. around 900 MHz for a cellular phone working in one frequency band of the GSM specification). It can also be equal to the full wavelength.
  • a number of components that are mildly sensitive to radio transmission caused by the antenna arrangement are provided on the second antenna element 20. These components include a speaker 24, a vibrator 20 and two LEDs (Light emitting diodes) 28.
  • Fig. 3 shows a similar construction to fig. 2, but here there is only one component in the form of a positioning antenna 30 of the GPS (Global Positioning System) type.
  • GPS Global Positioning System
  • Fig. 4 shows a side view of the main circuit board 32 of the phone having the antenna arrangement and component 30 according to fig. 3. It should be realised that this view is equally as well applicable for the phone according to fig. 2.
  • the antenna arrangement is, as was mentioned before, preferably provided as a plane in the main circuit board and then preferably the ground plane, thus including both the first 18 and the second antenna element 20. This plane does however have to include the gap between the two elements (not shown).
  • the electrical leads 34 necessary for driving the GPS antenna 30 are here provided in the interior of the main circuit board and can therefore easily be shielded.
  • the second antenna element can here also serve as a ground plane for the GPS antenna, which is preferably a ceramic chip antenna.
  • the current distribution on the antenna arrangement in these embodiments is concentrated to the middle of arrangement, i.e. to the middle of the first antenna element as seen in the view of fig. 4, i.e. in the length dimension of the first antenna element and is lower at the second antenna element and the bottom side opposite the top side of the first antenna element. Consequently the only mildly sensitive components placed on the second antenna element need not be shielded to function satisfactorily, which makes the phone simpler and cheaper to produce and since these components can be placed there, space is freed from other parts of the phone, which can be used for the placing of other components. This freed space is provided on the rest of the main circuit board and should therefore be shielded.
  • the reception of GPS signals from a satellite can be hampered by the radio transmission from the first antenna element. This hampering was in the embodiment according to fig. 3 solved by placing the GPS antenna on the second antenna element. This is in many cases sufficient.
  • a device according to a third embodiment of the invention is provided, which is shown in fig. 5.
  • Fig. 5 shows a perspective view of the first and second antenna elements according to this embodiment.
  • the second antenna element 20 is provided in the form of a flat plate placed at right angles to the top end of the first antenna element 18 and the GPS antenna 30 is placed on top of the upper surface of the second antenna element 20 that faces away from the first antenna element 18.
  • the second antenna element 20 is here not a part of the main circuit board.
  • the majority of the antenna currents i a from the antenna arrangement are provided in the plane of the first antenna element, and then in the middle in the length dimension of the first antenna element 18.
  • the antenna pattern of the antenna arrangement being essentially provided in a direction perpendicular to the plane of the first antenna element.
  • the antenna currents i c in the GPS antenna 30 are on the other hand provided in the orthogonal plane provided by the second antenna element 20.
  • FIG. 6 shows a perspective view of the antenna arrangement and GPS antenna 30 in a portable communication device according to a fourth embodiment of the present invention.
  • the second antenna element 20 is provided at the bottom side of the first antenna element 18.
  • the second antenna element 20 is furthermore provided as a hollow cylindrical body, where the interior of the cylinder may be shielded in order to include electrical components such as perhaps a battery.
  • the GPS antenna 30 is here provided at the top side of the first antenna element but at an angle perpendicular to the plane of the first antenna element.
  • the present invention has many advantages.
  • the antenna arrangement provides good wideband properties while still allowing the device to be small in size. It allows placing of components that are mildly sensitive to radiation without shielding close to antenna elements in the device, which lowers the complexity of the construction and also the cost of the device. This also enables the manufacturing of a slimmer device, which is often of advantage from a marketing perspective.
  • the device according to the third and fourth embodiments furthermore reduces the coupling between the component, if this is another type of antenna, and the antenna arrangement. This is of great advantage if the component is to receive weak signals, for example from a satellite. In the second and third embodiments there is no need to provide an extra ground plane for the component, since the second antenna element provides this, which reduces the cost and complexity of the device even further.
  • the present invention can be varied in many ways. It is possible to vary the second antenna element of the first, second and third embodiments according to the principles shown in the fourth embodiment, i.e. to provide a hollow possibly shielded body.
  • the position of the second antenna element can of course also be at the bottom end for these embodiments. It should be realised that this body does not have to be cylindrical, but can just as well have for instance a rectangular cross-section.
  • the interior can then also include additional or perhaps other components like a camera.
  • the embodiment according to fig. 6 can also be modified in that the second antenna element is provided in the same plane as the first antenna element and can then also be provided as a part of the ground plane of the main circuit board.
  • the second antenna element was in some of the described embodiments provided in the same plane as the first antenna element. It is also possible to place it slightly above the first antenna element in order to further reduce the size in the length direction of the phone. In this case the component can be placed on a surface of the second antenna element facing the main circuit board. In this case it is also not possible to provide the second antenna element as a part of the ground layer in the main circuit board.
  • the types of components used can furthermore be varied. Examples of other types of components are electromechanical switches and headphone jacks.
  • the positioning antenna described need not be a GPS type of antenna but can be any other type of positioning antenna. It need furthermore not be a positioning antenna at all. It can be any antenna arranged to operate separately from the main communication antenna arrangement.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Telephone Set Structure (AREA)
EP03077636A 2003-08-18 2003-08-18 Disposition des composants d'un système d'antenne Withdrawn EP1508937A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP03077636A EP1508937A1 (fr) 2003-08-18 2003-08-18 Disposition des composants d'un système d'antenne
PCT/EP2004/008891 WO2005018044A1 (fr) 2003-08-18 2004-08-09 Placement de composants sur un ensemble antenne
US10/568,395 US7250911B2 (en) 2003-08-18 2004-08-09 Placing of components on an antenna arrangement
CN2004800239178A CN1839513B (zh) 2003-08-18 2004-08-09 天线装置上部件的放置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03077636A EP1508937A1 (fr) 2003-08-18 2003-08-18 Disposition des composants d'un système d'antenne

Publications (1)

Publication Number Publication Date
EP1508937A1 true EP1508937A1 (fr) 2005-02-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03077636A Withdrawn EP1508937A1 (fr) 2003-08-18 2003-08-18 Disposition des composants d'un système d'antenne

Country Status (2)

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EP (1) EP1508937A1 (fr)
CN (1) CN1839513B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7612725B2 (en) 2007-06-21 2009-11-03 Apple Inc. Antennas for handheld electronic devices with conductive bezels
CN103700925B (zh) * 2013-12-24 2016-06-22 上海安费诺永亿通讯电子有限公司 一种全金属移动终端双缝天线

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201501B1 (en) * 1999-05-28 2001-03-13 Nokia Mobile Phones Limited Antenna configuration for a mobile station
US6326927B1 (en) 1999-07-21 2001-12-04 Range Star Wireless, Inc. Capacitively-tuned broadband antenna structure
WO2002005380A1 (fr) * 2000-07-10 2002-01-17 Allgon Mobile Communications Ab Dispositif antenne
WO2002037600A1 (fr) 2000-10-27 2002-05-10 Telefonaktiebolaget L M Ericsson (Publ) Antenne alimentee en extremite avec contrepoids pour terminal mobile
US20020158803A1 (en) 2001-04-27 2002-10-31 Matthew Commens Omni directional antenna with multiple polarizations
EP1317116A1 (fr) 2001-11-30 2003-06-04 Sagem SA Téléphone mobile avec organe intégré dans le volume de l'antenne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201501B1 (en) * 1999-05-28 2001-03-13 Nokia Mobile Phones Limited Antenna configuration for a mobile station
US6326927B1 (en) 1999-07-21 2001-12-04 Range Star Wireless, Inc. Capacitively-tuned broadband antenna structure
WO2002005380A1 (fr) * 2000-07-10 2002-01-17 Allgon Mobile Communications Ab Dispositif antenne
WO2002037600A1 (fr) 2000-10-27 2002-05-10 Telefonaktiebolaget L M Ericsson (Publ) Antenne alimentee en extremite avec contrepoids pour terminal mobile
US20020158803A1 (en) 2001-04-27 2002-10-31 Matthew Commens Omni directional antenna with multiple polarizations
EP1317116A1 (fr) 2001-11-30 2003-06-04 Sagem SA Téléphone mobile avec organe intégré dans le volume de l'antenne

Also Published As

Publication number Publication date
CN1839513B (zh) 2010-12-29
CN1839513A (zh) 2006-09-27

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