WO2010057911A1 - Appareil, procédé et programme informatique pour communications sans fil - Google Patents

Appareil, procédé et programme informatique pour communications sans fil Download PDF

Info

Publication number
WO2010057911A1
WO2010057911A1 PCT/EP2009/065378 EP2009065378W WO2010057911A1 WO 2010057911 A1 WO2010057911 A1 WO 2010057911A1 EP 2009065378 W EP2009065378 W EP 2009065378W WO 2010057911 A1 WO2010057911 A1 WO 2010057911A1
Authority
WO
WIPO (PCT)
Prior art keywords
ground plane
antenna
frequency band
resonant frequency
electrical
Prior art date
Application number
PCT/EP2009/065378
Other languages
English (en)
Other versions
WO2010057911A9 (fr
Inventor
Wanbo Xie
Ping Hui
Shu Liu
Rong Bang An
Original Assignee
Nokia Corporation
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 Nokia Corporation filed Critical Nokia Corporation
Priority to EP09752837.6A priority Critical patent/EP2353204B1/fr
Priority to CN200980146350.6A priority patent/CN102217134B/zh
Priority to PL09752837T priority patent/PL2353204T3/pl
Publication of WO2010057911A1 publication Critical patent/WO2010057911A1/fr
Publication of WO2010057911A9 publication Critical patent/WO2010057911A9/fr

Links

Classifications

    • 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
    • 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
    • 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
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means

Definitions

  • Embodiments of the present invention relate to an apparatus, method and computer program for wireless communication.
  • they relate to an apparatus, method and computer program in a portable electronic device.
  • Apparatus such as portable electronic devices usually include one or more antennas for wireless communication with other such apparatus.
  • the antennas are usually arranged to receive an encoded radio frequency (RF) signal from a transceiver and transmit the signal to another apparatus.
  • RF radio frequency
  • the antennas are usually arranged to be able to receive an encoded radio frequency signal from another apparatus and provide the signal to a transceiver for decoding.
  • the radio frequency signals emitted by the apparatus may affect other electronic apparatus which are positioned in relatively close proximity (for example, within ten centimeters) to the apparatus, that is. the 'near field' of the apparatus may affect other electronic apparatus.
  • the apparatus is a mobile cellular telephone
  • the 'near field' from the telephone may affect the operation of a user's hearing aid when the user is making a telephone call.
  • an apparatus comprising: a ground plane configured to receive an antenna operable in a first resonant frequency band, at a first end of the ground plane; and a member configured to electromagnetically couple with the antenna, provide the ground plane with an electrical dimension, in combination with the antenna, having a resonant mode at the first resonant frequency band, and to reduce current distribution at a second end of the ground plane, different to the first end.
  • the apparatus may be for wireless communications.
  • the member may be configured to reduce current distribution at the second end of the ground plane relative to an apparatus that does not comprise the member.
  • the electrical dimension of the ground plane may be electrical width.
  • the member may be positioned at the first end of the ground plane.
  • the member may be integral with the ground plane.
  • the member may be for connecting to the ground plane.
  • the first end of the ground plane may be opposite to the second end of the ground plane.
  • the member may comprise an elongate conductive portion.
  • the elongate conductive portion may be configured to extend from the ground plane toward a feed point of the antenna.
  • An open end of the elongate conductive portion may be configured to be in relatively close proximity to the feed point of the antenna.
  • the member may be configured to be substantially parallel to the antenna.
  • the member may be positioned at a distance of ⁇ /4 at the first resonant frequency band from an edge of the first end.
  • the member may be positioned at a distance, from an edge of the first end that, in use, has a maximum current density at the first resonant frequency band.
  • the member may have an electrical length substantially equal to ⁇ /2 at the first resonant frequency band.
  • the member may include an elongate conductive portion including a first part extending towards the antenna, and a second part extending from the first part away from the antenna.
  • the member may be configured to be variable.
  • the member may be configured to provide the ground plane with an electrical dimension, in combination with the antenna, selectable from a plurality of electrical dimensions.
  • the apparatus may further comprise a processor configured to control the member and may be configured to select the electrical dimension of the ground plane.
  • the apparatus may further comprise an audio output.
  • the audio output may be positioned at the second end of the ground plane.
  • the audio output may be configured to provide audio signals to a user of the apparatus.
  • the member may be configured to provide the ground plane with another electrical dimension, in combination with the antenna, having a resonant mode at a second resonant frequency band, different to the first resonant frequency band.
  • the resonant mode at the second resonant frequency band may be a common mode.
  • a portable electronic device comprising an apparatus as described in any of the preceding paragraphs.
  • a module comprising as apparatus as described in any of the preceding paragraphs.
  • a method comprising: providing a ground plane configured to receive an antenna operable in a first resonant frequency band, at a first end of the ground plane, and a member; and configuring the member to electromagnetically couple with the antenna, provide the ground plane with an electrical dimension, in combination with the antenna, having a resonant mode at the first resonant frequency band, and to reduce current distribution at a second end of the ground plane, different to the first end.
  • the method may further comprise positioning the member at the first end of the ground plane.
  • the first end of the ground plane may be opposite to the second end of the ground plane.
  • the member may comprise an elongate conductive portion.
  • the method may include configuring the elongate conductive portion to extend from the ground plane toward a feed point of the antenna.
  • the method may include configuring an open end of the elongate conductive portion to be in relatively close proximity to the feed point of the antenna.
  • the method may further comprise configuring the member to be substantially parallel to the antenna.
  • the method may further comprise positioning the member at a distance of ⁇ /4 at the first resonant frequency band from an edge of the first end.
  • the method may further comprise positioning the member at a distance, from an edge of the first end that, in use, has a maximum current density at the first resonant frequency band.
  • the member may have an electrical length substantially equal to ⁇ /2 at the first resonant frequency band.
  • the member may include an elongate conductive portion including a first part extending towards the antenna, and a second part extending from the first part away from the antenna.
  • the method may further comprise configuring the member to be variable and to provide the ground plane with an electrical dimension, in combination with the antenna, selectable from a plurality of electrical dimensions.
  • the method may further comprise providing a processor.
  • the method may further comprise configuring the processor to control the member and to select the electrical dimension of the ground plane.
  • the method may further comprise providing an audio output, positioned at the second end of the ground plane.
  • the method may further comprise configuring the audio output to provide audio signals to a user of the apparatus.
  • the method may further comprise configuring the member to provide the ground plane with another electrical dimension, in combination with the antenna, having a resonant mode at a second resonant frequency band, different to the first resonant frequency band.
  • the resonant mode at the second resonant frequency band may be a common mode.
  • a computer program that, when run on a computer, performs: controlling a member to provide a ground plane, in combination with an antenna, with an electrical dimension, selectable from a plurality of electrical dimensions, having a resonant mode at a first resonant frequency band, and to reduce current distribution at a second end of the ground plane, wherein the member is configured to electromagnetically couple with the antenna and the antenna is positioned at a first end of the ground plane, different to the second end of the ground plane and is operable in the first resonant frequency band.
  • the computer program may, when run on a computer, further perform determining if a change in the electrical dimension of the ground plane, member, and antenna combination is required, and controlling the member if a change in the electrical dimension is required.
  • a computer readable storage medium encoded with instructions that, when executed by a processor, performs: controlling a member to provide a ground plane, in combination with an antenna, with an electrical dimension, selectable from a plurality of electrical dimensions, having a resonant mode at a first resonant frequency band, and to reduce current distribution at a second end of the ground plane, wherein the member is configured to electromagnetically couple with the antenna and the antenna is positioned at first end of the ground plane, different to the second end of the ground plane and is operable in the first resonant frequency band.
  • the computer readable storage medium may be encoded with instructions that, when executed by a processor, perform: determining if a change in the electrical dimension of the ground plane, member, and antenna combination is required, and controlling the member if a change in the electrical dimension is required.
  • a method comprising: controlling a member to provide a ground plane, in combination with an antenna, with an electrical dimension, selectable from a plurality of electrical dimensions, having a resonant mode at a first resonant frequency band, and to reduce current distribution at a second end of the ground plane, wherein the member is configured to electromagnetically couple with the antenna and the antenna is positioned at first end of the ground plane, different to the second end of the ground plane and is operable in the first resonant frequency band.
  • the method may further comprise: determining if a change in the electrical dimension of the ground plane, member, and antenna combination is required, and controlling the member if a change in the electrical dimension is required.
  • Fig. 1 illustrates a schematic diagram of an apparatus according to various embodiments of the invention
  • Fig. 2 illustrates a schematic diagram of an apparatus according to various embodiments of the invention
  • Fig. 2A illustrates a perspective view of another apparatus according to various embodiments of the invention
  • Fig. 3 illustrates a graph of current distribution versus position along a ground plane for the apparatus illustrated in Fig. 2;
  • Fig. 4 illustrates a schematic diagram of another apparatus according to various embodiments of the invention.
  • Fig. 5 illustrates a flow diagram of a method of controlling an electrical dimension according to various embodiments of the present invention
  • Fig. 6 illustrates a perspective view of a further apparatus according to various embodiments of the invention
  • Fig. 7 illustrates a flow diagram of a method of providing an apparatus according to various embodiments of the present invention.
  • Figures 2, 2A and 4 illustrate an apparatus 10 comprising: a ground plane 32 configured to receive an antenna 18 operable in a first resonant frequency band, at a first end 38 of the ground plane 32; and a member 34 configured to electromagnetically couple with the antenna 18, provide the ground plane 32 with an electrical dimension, in combination with the antenna 18, having a resonant mode at the first resonant frequency band, and to reduce current distribution at a second end 40 of the ground plane 32, different to the first end 38.
  • Fig. 1 illustrates a schematic diagram of an apparatus 10 according to various embodiments of the present invention.
  • the apparatus 10 includes a processor 12, a memory 14, a transceiver 16, an antenna 18, and other circuitry 20.
  • connection/coupling may be a physical galvanic connection and/or an electromagnetic connection.
  • the apparatus 10 may be any electronic device and may be a portable electronic device such as, for example, a mobile cellular telephone, a personal digital assistant (PDA), a laptop computer, a palm top computer, a portable WLAN or WiFi device, or module for such devices.
  • a portable electronic device such as, for example, a mobile cellular telephone, a personal digital assistant (PDA), a laptop computer, a palm top computer, a portable WLAN or WiFi device, or module for such devices.
  • PDA personal digital assistant
  • 'module' refers to a unit or apparatus that excludes certain parts/components that would be added by an end manufacturer or a user.
  • the other circuitry 20 includes input/output devices such as a microphone, a loudspeaker, keypad and a display.
  • the electronic components that provide the processor 12, the memory 14, the transceiver 16, the antenna 18 and the other circuitry 20 are interconnected via a printed wiring board (PWB) 22 which may serve as a ground plane for the antenna 18.
  • PWB printed wiring board
  • the printed wiring board 22 may be a flexible printed wiring board.
  • the implementation of the processor 12 can be in hardware alone (for example, a circuit etc), have certain aspects in software including firmware alone or can be a combination of hardware and software (including firmware).
  • the processor 12 may be any suitable processor and may include a microprocessor and memory 12 2 .
  • the processor 12 may be implemented using instructions that enable hardware functionality, for example, by using executable computer program instructions in a general-purpose or special- purpose processor that may be stored on a computer readable storage medium (for example, disk, memory etc) to be executed by such a processor.
  • the processor 12 is configured to read from and write to the memory 14.
  • the processor 12 may also comprise an output interface 24 via which data and/or commands are output by the processor 12 and an input interface 26 via which data and/or commands are input to the processor 12.
  • the memory 14 may be any suitable memory and may, for example be permanent built-in memory such as flash memory or it may be a removable memory such as a hard disk, secure digital (SD) card or a micro-drive.
  • the memory 14 stores a computer program 28 comprising computer program instructions that control the operation of the apparatus 10 when loaded into the processor 12.
  • the computer program instructions 28 provide the logic and routines that enables the apparatus 10 to perform the method illustrated in Fig 5.
  • the processor 12 by reading the memory 14 is able to load and execute the computer program 28.
  • the computer program 28 may arrive at the apparatus 10 via any suitable delivery mechanism 30.
  • the delivery mechanism 30 may be, for example, a computer-readable storage medium, a computer program product, a memory device, a record medium such as a CD-ROM or DVD, an article of manufacture that tangibly embodies the computer program 28.
  • the delivery mechanism may be a signal configured to reliably transfer the computer program 28.
  • the apparatus 10 may propagate or transmit the computer program 28 as a computer data signal.
  • memory 14 is illustrated as a single component it may be implemented as one or more separate components some or all of which may be integrated/removable and/or may provide permanent/semi-permanent/ dynamic/cached storage.
  • references to 'computer-readable storage medium', 'computer program product', 'tangibly embodied computer program' etc. or a 'controller', 'computer', 'processor' etc. should be understood to encompass not only computers having different architectures such as single /multi- processor architectures and sequential (for example, Von Neumann)/parallel architectures but also specialized circuits such as field-programmable gate arrays (FPGA), application specific circuits (ASIC), signal processing devices and other devices. References to computer program, instructions, code etc.
  • the processor 12 is configured to provide signals to the transceiver 16.
  • the transceiver 16 is configured to receive and encode the signals from the processor 12 and provide them to the antenna 18 for transmission.
  • the transceiver 16 is also operable to receive and decode signals from the antenna 18 and then provide them to the processor 12 for processing.
  • the antenna 18 may be any antenna which is suitable for operation in an apparatus such as a mobile cellular telephone.
  • the antenna 18 may be a planar inverted F antenna (PIFA), a planar inverted L antenna (PILA), a loop antenna, a monopole antenna or a dipole antenna.
  • the antenna 18 may be a single antenna with one feed, a single antenna with multiple feeds or it may be an antenna arrangement which includes a plurality of antennas (for example, such as any combination of those mentioned above) with a plurality of feeds.
  • the antenna/antenna arrangement 18 may have one or more ground points which are configured to provide the antenna/antenna arrangement 18 with a ground reference.
  • the antenna 18 may have matching components between one or more feeds and the transceiver 16. These matching components may be lumped components (for example, inductors and capacitors) or transmission lines, or a combination of both.
  • the antenna 18 is operable in at least one operational resonant frequency band and may also be operable in a plurality of different radio frequency bands and/or protocols (for example, GSM, CDMA, and WCDMA).
  • Fig. 2 illustrates a schematic diagram of an apparatus 10 according to various embodiments of the present invention.
  • the apparatus 10 includes a ground plane 32, a member 34, an audio output 36 and an antenna 18.
  • the ground plane 32 may be any conductive part of the apparatus 10 and may be, as mentioned above, a printed wiring board that interconnects some, or all, of the electronic components of the apparatus 10.
  • the ground plane 32 may be a conductive casing of a component of the apparatus
  • the ground plane 32 may be a metallic covering of a battery of the apparatus 10) or be a conductive casing of the apparatus 10 itself (for example, a substantially metallic cover that defines the exterior surface of the apparatus 10).
  • the ground plane 32 may be planar in various embodiments (where it is a printed wiring board for example) or be non-planar (where it is a casing for an electronic component of the apparatus 10 for example).
  • the ground plane 32 may be referred to as a radiator in various embodiments of the present invention.
  • the ground plane 32 has a rectangular shape and has a first end 38, a second end 40, a third end 42 and a fourth end 44, the edges of which define the perimeter of the ground plane 32.
  • the ground plane 32 has a physical length (L) that extends between the edges of the first and second ends 38, 40 and a physical width (W) that extends between the edges of the third and fourth ends 42, 44.
  • the edge of the first end 38 and the edge of the second end 40 are shorter in length than the edge of the third end 42 and the edge of the fourth end 44. Consequently, the first end 38 is opposite the second end 40 and the third end 42 is opposite the fourth end 44. It should be appreciated that the above geometry is exemplary and that in other embodiments, the ground plane 32 may have any shape and consequently, any number of edges in any arrangement.
  • Fig. 2 also illustrates a Cartesian co-ordinate system 46 that includes an X axis 48 and a Y axis 50 which are orthogonal relative to one another.
  • the ground plane 32 is configured to receive the antenna 18 at the first end 38.
  • the ground plane 32 is configured to receive the antenna 18 at the corner of the ground plane 32 defined by the edge of the first end 38 and the edge of the fourth end 44.
  • the ground plane 32 may also be configured to receive the antenna 18 at another location of the ground plane 32 other than a corner of the ground plane 32.
  • the ground plane 32 may be configured to receive the antenna 18 part way along the edge of the first end 38.
  • the wording 'configured to receive the antenna' should be understood to encompass embodiments where the ground plane 32 may be specifically adapted to receive the antenna 18 at a feed point provided on the ground plane and other embodiments where the first end 38 is suitable for receiving the antenna 18, but is not specifically adapted to receive the antenna 18.
  • the antenna 18 is a planar inverted L antenna, operable in a first resonant frequency band (for example, PCS 1900 (1850-1990 MHz)) and has an electrical length substantially equal to ⁇ /4.
  • the antenna 18 extends from the corner defined by the edge of the first end 38 and the edge of the fourth end 44 in the +X direction and then makes a right angled, left handed turn and then extends in the +Y direction until an end point.
  • the portion of the antenna 18 between the end point and where the antenna 18 extends in the +Y direction is at a distance d from the first edge 38 of the ground plane 32. Consequently, the antenna 18 and the ground plane 32 define an aperture therebetween.
  • the antenna 18 may be operable in a plurality of resonant frequency bands either having a single radiating element or by having a plurality of radiating elements.
  • the antenna 18 may also (or alternatively) have a height above the ground plane 32 and that this is not illustrated in order to maintain the clarity of the figure.
  • a material may be provided in the space defined by the antenna 18 and the ground plane 32 which may support the antenna 18.
  • the material may include any non-conductive material, for example, polycarbonate acrylonitrile butadiene styrene (PC-ABS), ceramic, polystyrene, printed wiring board FR4 or any other type of plastic or other non-conductive material usually used for such mechanical structures.
  • the audio output 36 may be any device which is suitable for providing an audio output to a user.
  • the audio output 36 may be a loudspeaker which is configured to receive signals from the processor 12 and provide them to a user of the apparatus 10 as an audio signal.
  • the audio output 36 is located at the second end 40 of the ground plane 32. Consequently, when a user is operating the apparatus 10, the audio output device 36 is located at the top of the apparatus and the antenna 18 is located at the bottom of the apparatus.
  • the member 34 is conductive and may be planar (it may be in the same plane as the ground plane 32 for example) or non-planar. In this embodiment, the member 34 is integral with and part of the ground plane 32 (and consequently in the same plane as ground plane 32).
  • the member 34 can be considered as being defined by a slot 52 that extends from the edge of the first end 38 and has an L shape. In more detail, the slot 52 extends from a position along the edge of the first end 38 which is (in this embodiment) approximately one third along the edge from the corner defined by the edges of the first end 38 and the fourth end 44. The slot 52 extends in the -X direction and then makes a right angled, right handed turn and then extends in the +Y direction until an end point.
  • the member 34 can also be considered as including a conductive elongate portion (a portion of the ground plane 32) that extends from a corner of the ground plane 32 that is defined by the edges of the first end 38 and the third end 42.
  • the portion extends in the +X direction and then makes a right angled, right handed turn and then extends in the -Y direction until an end point which is at a position which is (in this embodiment) approximately one third along the edge of the first end 38 from the corner defined by the edge of the first end 38 and the edge of the fourth end 44.
  • the member 34 may be a physically separate component to the ground plane 32 (a metallic strip for example) which is connectable to the ground plane 32 via soldering for example.
  • the member 34 is substantially parallel to the antenna 18. Additionally, the end point (that is, the open end) of the member 34 is positioned in closer proximity to the feed of the antenna 18 than the interface between the member 34 and the ground plane 32. For example, the distance between the feed of the antenna 18 and the open end of the member 34 may be between ten to twenty five millimetres.
  • the antenna 18 may be at least seven millimetres from the edge of the first end 38 of the ground plane 32. Therefore, the member 34 is not configured to operate as a 'parasitic element' known in the art, but is instead configured to operate as a microwave element such as a microsthp stub line with a short circuit end and an open circuit end. As will be explained in more detail in the following paragraphs, the member 34 is configured to modify the electrical dimension (length and/or width) of the ground plane 32 and provide a condensed current distribution near the feed point of the antenna 18 and thereby substantially reduce (and substantially eliminate in some embodiments) current distribution at the others ends 40, 42 and 44 of the ground plane 32.
  • Fig. 2A illustrates a perspective view of another apparatus 10 according to various embodiments of the present invention.
  • the apparatus 10 illustrated in fig. 2A is similar to the apparatus illustrated in fig. 2 and where the features are similar, the same reference numerals are used.
  • Fig. 2A also illustrates a Cartesian co-ordinate system 46 that includes an X axis 48, a Y axis 50 and Z axis 51 which are orthogonal relative to one another.
  • the apparatus 10 includes a support member 53 (for example, an antenna carrier) positioned at the first end 38 of the ground plane 32.
  • the support member 53 comprises a first cuboid having a height hi and a second cuboid having a height h 2 .
  • the two cuboids are contiguous with one another and the height hi of the first cuboid is greater than the height h 2 of the second cuboid
  • the antenna 18 is mounted on the first cuboid and the member 34 is mounted on the second cuboid.
  • the arrangement illustrated in fig. 2A is three dimensional.
  • only the antenna 18 may be mounted on the support member 53, and the member 34 may be mounted on a separate support member (not illustrated). Therefore, the antenna 18 and the member 34 do not necessarily have to be mounted on the same carrier. There may be physical separation, for example a gap, between each of the separate support members.
  • the antenna 18 extends from the corner of the ground plane 32 defined by the edge of the first end 38 and the edge of the fourth end 44 in a +Z direction. The antenna 18 then makes a right angled turn at height hi above the ground plane 32 and extends in the +Y direction until an end point.
  • the member 34 is conductive and may be planar or non-planar. In this embodiment, the member is configured to connect to the ground plane 32.
  • the member 34 extends from the edge of the third end 42 (near the corner defined by the first end 38 and the third end 42) in the +Z direction and then makes a right angled turn at the height h 2 above the ground plane 32 and extends in the -Y direction until it reaches the fourth end 44 of the ground plane 32.
  • the member 34 then makes a right angled turn in the +X direction and extends until an end point (that is, the open end of the member 34) that is in relatively close proximity to the feed of the antenna 18.
  • the member 34 defines a slot 52 that extends from the edge of the second end 42 and has a rectangular shape formed between the member 34 and the ground plane 32.
  • the support member 53 may have any other shape that is suitable for supporting the antenna 18 and the member 34. Additionally, the upper surface(s) of the support member 53 may not be parallel to the ground plane 32.
  • the support member 53 may comprise any non-conductive material, for example, PC-ABS, plastic, plastic and air, polystyrene etc.
  • the support member 53 may also physically support a flexi-circuit on which the member 34 and the antenna 18 may be provided.
  • the antenna 18 and the member 34 may be constructed from sheet metal which is bent, or other similar manufacturing techniques.
  • the antenna 18, ground plane 32 and member 34 provide a radiative combination which is operable to transmit and/or receive electromagnetic signals in the first resonant frequency band.
  • the member 34 is configured to provide the ground plane 32 with an electrical dimension (electrical width in this embodiment) that, in combination with the electrical length of the antenna 18, is equal to N ⁇ /2 (where N is an integer equal to or greater than 1 ).
  • the physical width of the ground plane 32 may be equal to 0.4 ⁇ and the antenna 18 may have an electrical length equal to 0.25 ⁇ .
  • the member 34 is configured to have an electrical length of approximately 0.35 ⁇ and thereby provide the combination of the antenna 18, ground plane 32 and the member 34 with an electrical width of 1.0 ⁇ . From this example, it can be seen that the member 34 is configured to change the electrical width of the ground plane 32, member 34 and antenna 18 combination to be equal to a desired value.
  • the combined electrical width of the ground plane 32, member 34 and antenna 18 is configured to enable current flowing in the ground plane 32, member 34 and antenna 18 to form a standing wave and thereby provide a resonant mode at the first resonant frequency band.
  • the combined electrical width provides a transverse standing wave that extends between the third end 42 and the fourth end 44 (that is, along the width of the ground plane 32).
  • the electrical width of the ground plane 32, member 34 and antenna 18 combination is thereby optimised for enabling the current to form a transverse standing wave at the first resonant frequency band. This configuration results in an increase in transverse current flow (that is, a flow of current along the width of the ground plane 32) and a consequent decrease in longitudinal current flow (that is, a flow of current along the length of the ground plane 32).
  • the antenna 18 Since the antenna 18 is positioned at the first end 38 of the ground plane 32, the antenna 18 strongly electromagnetically couples with the first end 38 of the ground plane 32 and with the member 34. This configuration results in an increase of current distribution at the first end 38 and a consequent decrease in current distribution at the second end 40.
  • the current distribution at the first end 38 of the ground plane 32 may also be increased by the transverse orientation of the member 34 and by the adjacent and parallel positioning of the member 34 relative to the antenna 18.
  • Fig. 3 illustrates a graph of current distribution in the ground plane 32 along the length of the ground plane 32.
  • the graph has a horizontal axis that represents the position along the length of the ground plane 32 between position A (first end 38) and position B (second end 40), and a vertical axis that represents the magnitude of the current distribution in the ground plane 32.
  • the magnitude of the current distribution is at a maximum and is substantially constant until position C (corresponding to the interface between the ground plane 32 and the member 34). From position C, the current distribution falls exponentially, reaching a minimum at position B.
  • Embodiments of the present invention may provide an advantage when the audio output 36 is positioned at the second end 40 of the ground plane 32.
  • the configuration of the ground plane 32, member 34 and antenna 18 may reduce the electromagnetic field at the second end 40 (that is, the 'near field' at the second end 40) which may reduce interference with a user's hearing aid when a user places the audio output 36 to his ear.
  • the antenna 18, ground plane 32 and member 34 may be configured to operate in any of the following operational radio frequency bands and via any of the following different protocols.
  • the different frequency bands and protocols may include (but are not limited to) Long Term Evolution (LTE) 700 (US) (698.0 - 716.0 MHz, 728.0 -746.0 MHz), LTE 1500 (Japan) (1427.9 - 1452.9 MHz, 1475.9 - 1500.9 MHz), LTE 2600 (Europe) (2500 - 2570 MHz, 2620 - 2690 MHz), amplitude modulation (AM) radio (0.535-1.705 MHz); frequency modulation (FM) radio (76-108 MHz); Bluetooth (2400- 2483.5 MHz); wireless local area network (WLAN) (2400-2483.5 MHz); helical local area network (HLAN) (5150-5850 MHz); global positioning system (GPS) (1570.42-1580.42 MHz); US - Global system for mobile communications (US- GSM) 850 (824-894 MHz);
  • the member 34 may have any shape which is suitable for providing the combination of the ground plane 32, member 34 and antenna 18 with an electrical dimension that reduces the current distribution as described above.
  • the member 34 may include one or more reactive components (for example, capacitors, inductors) that electrically lengthen or shorten the electrical length of the member 34 as desired.
  • the member 34 is configured to provide the ground plane 32 and antenna 18 combination with a particular electrical width. It should be appreciated however that the member 34 may be configured to provide the ground plane 32 and antenna 18 combination with any particular electrical dimension. For example, if the audio output 36 is positioned at the fourth end 44, then in order to reduce current distribution at the fourth end 44, the antenna 18 and the member 34 may be positioned at the third end 42 and the member 34 may be configured to provide the combination of the ground plane 32 and the antenna 18 with a particular electrical length.
  • embodiments of the present invention may include other physical configurations of the member 34, antenna 18 and audio output 36.
  • the audio output 36 may be positioned at the fourth end 44 and the antenna 18 may be positioned at the first end 38.
  • the antenna 18 has at least one feed point to the ground plane 32 located at the corner defined by the edge of the first end 38 and the edge of the third end 42.
  • the member 34 is located along the edge 42 and is configured so that the open end of the member 34 is positioned in relatively close proximity with at least one feed point of the antenna 18.
  • the member 34 is configured to modify the current distribution so that it is substantially condensed along the edge of the third end 42 and substantially reduced (substantially eliminated in some embodiments) at the fourth end 44.
  • a 'common mode' of the antenna 18 and the member 34 may be used to provide an additional resonant frequency band in which the apparatus 10 is operable.
  • the antenna 18, ground plane 32 and member 34 may provide a radiative combination which is operable to efficiently transmit and/or receive electromagnetic signals in a second resonant frequency band (different to the first resonant frequency band mentioned above).
  • the member 34 is configured to provide the ground plane 32 with an electrical dimension (electrical length in the embodiment described in the preceding paragraphs) that, in combination with the electrical length of the antenna 18, is equal to N ⁇ /2 (where N is an integer equal to or greater than 1 ).
  • the combined electrical length provides a longitudinal standing wave that extends between the first end 38 and the second end 40 (that is, along the length of the ground plane 32).
  • the electrical length of the ground plane 32, member 34 and antenna 18 combination is thereby optimised for enabling the current to form a longitudinal standing wave at the second resonant frequency band.
  • Fig. 4 illustrates a schematic diagram of another apparatus 10 according to various embodiments of the present invention.
  • the apparatus 10 illustrated in Fig. 4 is similar to the apparatus illustrated in Fig. 2 and where the features are similar, the same reference numerals are used.
  • the apparatus 10 illustrated in Fig. 4 differs from that illustrated in Fig. 2 in that the antenna 18 includes a first portion 18i, operable in a first resonant frequency band (for example, EGSM 900 (880-960 MHz)) and a second portion 18 2 , operable in a second resonant frequency band (for example, PCS 1900 (1850-1990 MHz)).
  • a first resonant frequency band for example, EGSM 900 (880-960 MHz
  • a second portion 18 2 operable in a second resonant frequency band
  • PCS 1900 for example, PCS 1900 (1850-1990 MHz
  • the member 34 is variable and is configured to provide the ground plane 32 with an electrical dimension, in combination with the antenna 18, selectable from a plurality of electrical dimensions.
  • the member 34 includes a first portion 34i and a second portion 34 2 which are selectively connectable to the ground plane 32 via a switch 54.
  • the switch 54 is configured to receive control signals 55 from the processor 12 (illustrated in Fig. 1 ) and switch between connecting the ground plane 32 to the first portion 34i and connecting the ground plane 32 to the second portion 34 2 .
  • the first portion 34i is configured to provide the combination of the ground plane 32, first antenna portion 18i with an electrical width at the first resonant frequency band which reduces current distribution at the second end 40 as described above with reference to Fig. 2.
  • the second portion 34 2 is configured to provide the combination of the ground plane 32, second antenna portion 18 2 with an electrical width at the second resonant frequency band which reduces current distribution at the second end 40.
  • the first portion 34i of the member 34 may be located at a different end of the ground plane 32 to the second portion 34 2 of the member 34 in order to take account of the different current distributions provided by the different operating frequency bands of the antenna 18.
  • the first portion 34i may be located at the first end 38 and the second portion 34 2 may be located at the third end 42.
  • the member 34 may include a plurality of reactive components (for example, inductors and capacitors) and a switch for connecting them to the ground plane 32 to change the electrical dimension of the combination 32, 34, 18.
  • the processor 12 determines if the electrical dimension of the ground plane 32, antenna 18 and member 34 combination should be changed.
  • the apparatus 10 may determine that the electrical dimension of the combination 32, 34, 18 should be changed if the operational frequency band of the apparatus 10 changes from the first operational frequency band to the second operational frequency band and vice versa.
  • the method moves to block 60 and the processor 12 sends a control signal 55 to the switch 54 to connect the ground plane 32 to either the first portion 34i of the member 34 or to the second portion 34 2 of the member 34 as desired.
  • the method moves back to block 56 and the processor 12 continues to determine if the electrical dimension should be varied.
  • the blocks illustrated in Fig. 5 may represent steps in a method and/or sections of code in the computer program 28.
  • the illustration of a particular order to the blocks does not necessarily imply that there is a required or preferred order for the blocks and the order and arrangement of the blocks may be varied. Furthermore, it may be possible for some steps to be omitted.
  • Fig. 6 illustrates a perspective view of a further apparatus 10 according to various embodiments of the invention.
  • the apparatus illustrated in fig. 6 is similar to the apparatus illustrated in figs. 2, 2A, and 4 and where the features are similar, the same reference numerals are used.
  • Fig 6 also illustrates a Cartesian co-ordinate system 46 that includes an X axis 48, a Y axis 50 and Z axis 51 which are orthogonal relative to one another.
  • the antenna 18 is similar to the antenna illustrated in fig. 4 and includes a first portion 18i, operable in a first resonant frequency band (for example, EGSM 900 (880-960 MHz)) and a second portion 18 2 , operable in a second resonant frequency band (for example, PCS 1900 (1850-1990 MHz)).
  • the antenna 18 is positioned at the corner of the ground plane 32 that is defined by the first end 38 and the third end 42.
  • the member 34 is positioned along the edge of the fourth end 44 of the ground plane 32 at a distance (d) from the edge of the first end 38 that is substantially equal to ⁇ /4 at the second resonant frequency band.
  • the member 34 has an electrical length that is substantially equal to ⁇ /2 at the second resonant frequency band.
  • the member 34 includes an elongate conductive portion that extends from the ground plane 32 in the +Z direction until a position (a). At position (a), the elongate conductive portion has a right angled turn and then extends in the +X direction until position (b). At position (b), the elongate conductive portion has a right angled turn and then extends in the -Y direction until position (c). At position (c), the elongate conductive portion has a right angled turn and then extends in the -X direction until the end of the elongate conductive portion at position (d).
  • the second antenna portion I 82 electromagnetically couples with the ground plane 32 and excites electrical radio frequency currents in the ground plane 32.
  • a standing wave node is formed at the second resonant frequency band and is a position of maximum (or near maximum) current density in the ground plane 32. Since the quality factor (Q) of the member 34 is greater than the quality factor of the ground plane 32 (the resistance of the member 34 is lower than the resistance of the ground plane 32), the current flows into the member 34 and a substantially reduced current flows down the ground plane 32 in the -X direction.
  • the combined electrical dimension of the ground plane 32 ( ⁇ /4), member 34 ( ⁇ /2) and antenna 18 ( ⁇ /4) is configured to enable current flowing in the ground plane 32, the member 34 and the antenna 18 to form a standing wave and thereby provide a resonant mode at the second resonant frequency band.
  • This configuration reduces the current density and electromagnetic field (that is, near field radiation) at the second end 40 of the ground plane 32.
  • this configuration may reduce interference with a user's hearing aid when a user places the audio output 36 to his ear.
  • the member 34 may have an electrical length that is less than ⁇ /2 at the second resonant frequency band (that is, the resonance of the member 34 is tuned higher in frequency than the second resonant frequency band). These embodiments may advantageously reduce near field radiation at the second end 40 of the ground plane 32 and may also widen the bandwidth of the antenna 18.
  • Fig. 7 illustrates a flow diagram of a method of providing an apparatus according to various embodiments of the present invention.
  • the method includes providing a ground plane 32, an antenna 18 and a member 34.
  • the method includes configuring the member 34 to electromagnetically couple with the antenna 18, provide the ground plane 32 with an electrical dimension having a resonant mode at the first resonant frequency band and to reduce the current distribution at the second end 40 of the ground plane 32.
  • Block 64 may also include configuring the member 34 to be variable and to provide the ground plane 32 with an electrical dimension in combination with the antenna 18 that is selectable from a plurality of electrical dimensions.
  • embodiments of the present invention may find application in reducing electromagnetic interference between two different antennas within an apparatus.
  • a first antenna may be positioned at the first end 38 of the ground plane 32 and a second antenna may be positioned at the second end 40 of the ground plane 32.
  • embodiments of the present invention may reduce the near field of the first antenna at the second end 40 and may reduce the near field of the second antenna at the first end 38.

Abstract

L’invention concerne un appareil comprenant un plan de sol configuré pour recevoir une antenne qui fonctionne dans une première bande de fréquence résonante, sur une première extrémité du plan de sol; et un élément configuré pour être couplé électro-magnétiquement avec l’antenne, assurer une dimension électrique au plan de sol en combinaison avec l’antenne qui présente un mode résonant dans la première bande de fréquence résonante, et réduire la distribution de courant sur une seconde extrémité du plan de sol, différente de la première extrémité.
PCT/EP2009/065378 2008-11-20 2009-11-18 Appareil, procédé et programme informatique pour communications sans fil WO2010057911A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09752837.6A EP2353204B1 (fr) 2008-11-20 2009-11-18 Appareil, procédé et programme informatique pour communications sans fil
CN200980146350.6A CN102217134B (zh) 2008-11-20 2009-11-18 用于无线通信的装置、方法和计算机程序
PL09752837T PL2353204T3 (pl) 2008-11-20 2009-11-18 Urządzenie, sposób i program komputerowy do komunikacji bezprzewodowej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/313,405 US8344962B2 (en) 2008-11-20 2008-11-20 Apparatus, method and computer program for wireless communication
US12/313,405 2008-11-20

Publications (2)

Publication Number Publication Date
WO2010057911A1 true WO2010057911A1 (fr) 2010-05-27
WO2010057911A9 WO2010057911A9 (fr) 2011-07-07

Family

ID=41582206

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/065378 WO2010057911A1 (fr) 2008-11-20 2009-11-18 Appareil, procédé et programme informatique pour communications sans fil

Country Status (6)

Country Link
US (1) US8344962B2 (fr)
EP (1) EP2353204B1 (fr)
KR (1) KR20110086178A (fr)
CN (1) CN102217134B (fr)
PL (1) PL2353204T3 (fr)
WO (1) WO2010057911A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017141601A1 (fr) * 2016-02-18 2017-08-24 パナソニックＩｐマネジメント株式会社 Dispositif d'antenne et appareil électronique
WO2017141602A1 (fr) * 2016-02-18 2017-08-24 パナソニックＩｐマネジメント株式会社 Dispositif d'antenne et appareil électronique

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8259026B2 (en) * 2008-12-31 2012-09-04 Motorola Mobility Llc Counterpoise to mitigate near field radiation generated by wireless communication devices
JP5418600B2 (ja) * 2009-10-27 2014-02-19 株式会社村田製作所 送受信装置及び無線タグ読み取り装置
WO2012046103A1 (fr) * 2010-10-06 2012-04-12 Nokia Corporation Appareil à antenne et procédés
JP2012142793A (ja) * 2010-12-28 2012-07-26 Fujitsu Component Ltd アンテナ装置
US9099771B2 (en) * 2011-01-11 2015-08-04 Apple Inc. Resonating element for reducing radio-frequency interference in an electronic device
CN102595296B (zh) * 2012-01-31 2016-03-02 惠州Tcl移动通信有限公司 助听器兼容装置及助听器兼容移动终端
US9478859B1 (en) * 2014-02-09 2016-10-25 Redpine Signals, Inc. Multi-band compact printed circuit antenna for WLAN use
CN205488505U (zh) * 2016-01-08 2016-08-17 中磊电子（苏州）有限公司 宽带天线
US11437730B2 (en) * 2018-04-05 2022-09-06 Hewlett-Packard Development Company, L.P. Patch antennas with excitation radiator feeds
CN111864349B (zh) * 2019-04-26 2021-12-28 北京小米移动软件有限公司 移动终端及移动终端的天线辐射方法
JP2021136527A (ja) * 2020-02-26 2021-09-13 日本航空電子工業株式会社 マルチバンドアンテナ
WO2024015064A1 (fr) * 2022-07-14 2024-01-18 Hewlett-Packard Development Company, L.P. Circuits d'annulation de bruit

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001274719A (ja) * 2000-03-24 2001-10-05 Murata Mfg Co Ltd 無線通信機
US20030142022A1 (en) * 2002-01-28 2003-07-31 Nokia Corporation Tunable patch antenna for wireless communication terminals
EP1401050A1 (fr) * 2002-09-19 2004-03-24 Filtronic LK Oy Antenne interne
US20050159195A1 (en) * 2002-02-06 2005-07-21 Stefan Huber Radio communication device and printed board comprising at least one current-conducting correction element
EP1562259A1 (fr) * 2004-02-06 2005-08-10 Kabushiki Kaisha Toshiba Appareil de radiocommunication
US20080231521A1 (en) * 2004-12-30 2008-09-25 Fractus, S.A. Shaped Ground Plane For Radio Apparatus
WO2008120038A1 (fr) * 2007-03-30 2008-10-09 Nokia Corporation Arrangement d'antenne

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2016100A1 (fr) 1989-06-02 1990-12-02 Jan Bock Produit chimique de nettoyage d'huile sur les berges
JP2004524747A (ja) 2001-03-07 2004-08-12 シーメンス　アクチエンゲゼルシヤフト Ｓａｒ値低減補正要素を有する無線通信装置
US6700540B2 (en) * 2002-02-14 2004-03-02 Ericsson, Inc. Antennas having multiple resonant frequency bands and wireless terminals incorporating the same
CN1275486C (zh) 2002-09-06 2006-09-13 广达电脑股份有限公司 低辐射移动电话手机
ES2358571T3 (es) * 2004-06-02 2011-05-11 Research In Motion Limited Dispositivo móvil de comunicaciones inalámbricas que comprende una antena de banda multi-frecuencia y métodos relacionados.
US7330156B2 (en) * 2004-08-20 2008-02-12 Nokia Corporation Antenna isolation using grounded microwave elements
SE528088C2 (sv) * 2004-09-13 2006-08-29 Amc Centurion Ab Antennanordning och bärbar radiokommunikationsanordning innefattande sådan antennanordning
US7277058B2 (en) * 2004-12-30 2007-10-02 Motorola, Inc. Wireless communication device antenna for improved communication with a satellite
JP4959956B2 (ja) * 2005-06-07 2012-06-27 株式会社日立製作所 アンテナ
SE0502225L (sv) 2005-10-10 2006-10-17 Amc Centurion Ab Antennanordning
CN1983714A (zh) * 2005-12-14 2007-06-20 三洋电机株式会社 多频段终端天线及使用其的天线系统
US7479927B2 (en) * 2005-12-30 2009-01-20 Motorola, Inc. Radio frequency antenna system
KR100768502B1 (ko) * 2006-06-30 2007-10-19 삼성전자주식회사 인체로 방사되는 전자파를 감소시킨 이동통신 단말기 및이동통신용 안테나
US8525734B2 (en) 2006-12-21 2013-09-03 Nokia Corporation Antenna device
US8378900B2 (en) * 2007-07-18 2013-02-19 Nokia Corporation Antenna arrangement
US7728779B2 (en) * 2008-01-03 2010-06-01 Sony Ericsson Mobile Communications Ab Combined microphone and radio-frequency antenna modules
US7633449B2 (en) * 2008-02-29 2009-12-15 Motorola, Inc. Wireless handset with improved hearing aid compatibility

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001274719A (ja) * 2000-03-24 2001-10-05 Murata Mfg Co Ltd 無線通信機
US20030142022A1 (en) * 2002-01-28 2003-07-31 Nokia Corporation Tunable patch antenna for wireless communication terminals
US20050159195A1 (en) * 2002-02-06 2005-07-21 Stefan Huber Radio communication device and printed board comprising at least one current-conducting correction element
EP1401050A1 (fr) * 2002-09-19 2004-03-24 Filtronic LK Oy Antenne interne
EP1562259A1 (fr) * 2004-02-06 2005-08-10 Kabushiki Kaisha Toshiba Appareil de radiocommunication
US20080231521A1 (en) * 2004-12-30 2008-09-25 Fractus, S.A. Shaped Ground Plane For Radio Apparatus
WO2008120038A1 (fr) * 2007-03-30 2008-10-09 Nokia Corporation Arrangement d'antenne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017141601A1 (fr) * 2016-02-18 2017-08-24 パナソニックＩｐマネジメント株式会社 Dispositif d'antenne et appareil électronique
WO2017141602A1 (fr) * 2016-02-18 2017-08-24 パナソニックＩｐマネジメント株式会社 Dispositif d'antenne et appareil électronique

Also Published As

Publication number Publication date
CN102217134B (zh) 2015-04-01
EP2353204B1 (fr) 2015-02-25
EP2353204A1 (fr) 2011-08-10
WO2010057911A9 (fr) 2011-07-07
US8344962B2 (en) 2013-01-01
KR20110086178A (ko) 2011-07-27
PL2353204T3 (pl) 2015-08-31
US20100123640A1 (en) 2010-05-20
CN102217134A (zh) 2011-10-12

Similar Documents

Publication Publication Date Title
EP2353204B1 (fr) Appareil, procédé et programme informatique pour communications sans fil
EP2232630B1 (fr) Appareils, méthodes et programmes informatiques de télécommunications sans fil
EP2165384B1 (fr) Appareil de communication sans fil
US7876273B2 (en) Apparatus and method
US20160190690A1 (en) Multiband slot antenna system and apparatus
EP2449624B1 (fr) Appareil pour communications sans fil comprenant une antenne de type boucle
US9263789B2 (en) Antenna apparatus and methods
US9997833B2 (en) Antenna
EP3167509B1 (fr) Appareil et procédés pour une communication sans fil
WO2012025787A1 (fr) Appareil et procédés pour une communication sans fil
EP3595085B1 (fr) Appareil de communication sans fil
EP2695236B1 (fr) Appareil pour communication sans fil
US9614276B2 (en) Antenna apparatus and methods

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200980146350.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09752837

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 4288/DELNP/2011

Country of ref document: IN

Ref document number: 2009752837

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 20117014050

Country of ref document: KR

Kind code of ref document: A