WO2012025787A1 - Appareil et procédés pour une communication sans fil - Google Patents

Appareil et procédés pour une communication sans fil Download PDF

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Publication number
WO2012025787A1
WO2012025787A1 PCT/IB2010/053804 IB2010053804W WO2012025787A1 WO 2012025787 A1 WO2012025787 A1 WO 2012025787A1 IB 2010053804 W IB2010053804 W IB 2010053804W WO 2012025787 A1 WO2012025787 A1 WO 2012025787A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
frequency band
point
ground point
ground
Prior art date
Application number
PCT/IB2010/053804
Other languages
English (en)
Inventor
Hanyang Wang
Alan Johnson
Hongfei Hu
Ziyang Guo
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 PCT/IB2010/053804 priority Critical patent/WO2012025787A1/fr
Publication of WO2012025787A1 publication Critical patent/WO2012025787A1/fr

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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
    • H01Q1/12—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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • Embodiments of the present invention relate to apparatus and methods for wireless communication.
  • they relate to apparatus in portable electronic devices, for example, a mobile cellular telephone.
  • An electronic device such as a mobile cellular telephone, usually includes an antenna arrangement for enabl ing wireless commun ication with other electronic devices.
  • the antenna arrangement may be operable in one or more operational frequency bands and protocols (for example, US wideband code division multiple access (US-WCDMA) 1900 (1850-1990 MHz)).
  • US-WCDMA US wideband code division multiple access
  • an antenna arrangement may require a relatively large number of antennas in order to be able to efficiently operate in the desired operational frequency bands and protocols.
  • Such an antenna arrangement may be relatively large and may require a manufacturer to increase the size of the electronic device in order to accommodate the antenna arrangement.
  • an apparatus comprising: a first antenna connected to a feed point; and a second antenna including a first portion connected to a first ground point and a second portion connected to a second ground point and having a loop structure between the first portion and the second portion, the first antenna and the second antenna being configured to electromagnetically couple and operate in a first frequency band.
  • the first antenna may have a physical length substantially equal to quarter of a wavelength of a second frequency band, the second frequency band may at least partially overlap with the first frequency band.
  • the first antenna may include a first end and a second end. The first end may be connected to the feed point and the second end may be positioned in proximity to a portion of the second antenna substantially halfway between the first portion and the second portion.
  • the first antenna may be connected to a ground point and may have a loop structure between the feed point and the ground point.
  • the first antenna may have a physical length substantially equal to half of a wavelength of a second frequency band, the second frequency band may at least partially overlap with the first frequency band.
  • a portion substantially halfway between the ground point and the feed point of the first antenna may be positioned in proximity to a portion substantially halfway between the first portion and the second portion of the second antenna.
  • the second antenna may have a physical length substantially equal to half of a wavelength of a third frequency band, the third frequency band may at least partially overlap with the first frequency band.
  • the apparatus may further comprise a ground plane including the first ground point and the second ground point.
  • the second antenna may at least partially overlay the ground plane.
  • the apparatus may further comprise a ground plane including the first ground point and the second ground point, the second antenna may have a non- overlaying arrangement with the ground plane.
  • the second antenna may be non planar.
  • the apparatus may further comprise a support member having a first surface and a second surface, wherein at least part of the first antenna may be provided on the first surface and at least part of the second antenna may be provided on the second surface.
  • the loop structure of the second antenna may define a space therein and the first antenna is positioned within the space defined by the loop structure of the second antenna.
  • a portable electronic device comprising an apparatus as described in any of the preceding paragraphs.
  • a module comprising an apparatus as described in any of the preceding paragraphs.
  • a method comprising: providing a first antenna connected to a feed point, and a second antenna including a first portion connected to a first ground point and a second portion connected to a second ground point and having a loop structure between the first portion and the second portion, configuring the first antenna and the second antenna to electromagnetically couple and operate in a first frequency band.
  • the first antenna may have a physical length substantially equal to quarter of a wavelength of a second frequency band, the second frequency band may at least partially overlap with the first frequency band.
  • the first antenna may include a first end and a second end, the first end being connected to the feed point and the method may further comprise positioning the second end in proximity to a portion of the second antenna substantially halfway between the first portion and the second portion.
  • the first antenna may be connected to a ground point and may have a loop structure between the feed point and the ground point, the first antenna may have a physical length substantially equal to half of a wavelength of a second frequency band, the second frequency band may at least partially overlap with the first frequency band.
  • the method may further comprise positioning a portion substantially halfway between the ground point and the feed point of the first antenna in proximity to a portion substantially halfway between the first portion and the second portion of the second antenna.
  • the second antenna may have a physical length substantially equal to half of a wavelength of a third frequency band, the third frequency band may at least partially overlap with the first frequency band.
  • the method may further comprise providing a ground plane including the first ground point and the second ground point, the second antenna may at least partially overlay the ground plane.
  • the method may further comprise providing a ground plane including the first ground point and the second ground point, the second antenna may have a non-overlaying arrangement with the ground plane.
  • the second antenna may be non planar.
  • the method may further comprise providing a support member having a first surface and a second surface, wherein at least part of the first antenna may be provided on the first surface and at least part of the second antenna may be provided on the second surface.
  • the loop structure of the second antenna may define a space therein and the first antenna is positioned within the space defined by the loop structure of the second antenna.
  • Fig. 1 illustrates a schematic diagram of a device including an apparatus according to various embodiments of the invention
  • Fig. 2 illustrates a plan view of a first apparatus according to various embodiments of the invention
  • Fig. 3 illustrates a plan view of a second apparatus according to various embodiments of the invention
  • Fig. 4 illustrates a plan view of a third apparatus according to various embodiments of the invention
  • Fig. 5 illustrates a plan view of a fourth apparatus according to various embodiments of the invention
  • Fig . 6 ill ustrates a plan view of a fifth apparatus accord ing to various embodiments of the invention
  • Fig. 7 illustrates a plan view of a sixth apparatus according to various embodiments of the invention.
  • Fig. 8 illustrates a plan view of a seventh apparatus according to various embodiments of the invention
  • Fig. 9 illustrates a plan view of an eighth apparatus according to various embodiments of the invention
  • Fig. 10 illustrates a perspective view of a ninth apparatus according to various embodiments of the invention.
  • Fig. 1 1 illustrates a graph of operating frequency versus return loss for the ninth apparatus illustrated in fig. 10;
  • Fig. 12 illustrates a flow diagram for manufacturing an apparatus according to various embodiments of the present invention.
  • connection/coupling may be a physical galvanic connection and/or an electromagnetic connection.
  • Figures 2 to 10 illustrate an apparatus 12 comprising: a first antenna 22 connected to a feed point 30; and a second antenna 24 including a first portion 32 connected to a first ground point 34 and a second portion 36 connected to a second ground point 38 and having a loop structure between the first portion 32 and the second portion 36, the first antenna 22 and the second antenna 24 being configured to electromagnetically couple and operate in a first frequency band.
  • fig. 1 illustrates an electronic device 1 0 such as a portable electronic device (for example, a mobile cellular telephone, a personal digital assistant or a hand held computer), a non-portable electronic device (for example, a personal computer or a base station for a cellular network) or a module for such devices.
  • 'module' refers to a unit or apparatus that excludes certain parts/components that would be added by an end manufacturer or a user.
  • the electronic device 10 comprises an apparatus 12, radio circuitry 14 and functional circuitry 1 6.
  • the apparatus 1 2 may also be referred to as an antenna arrangement and may be configured to transmit and receive, transmit only or receive only electromagnetic signals.
  • the apparatus 12 is described in more detail in the following paragraphs.
  • the radio circuitry 14 is connected between the apparatus 12 and the functional circuitry 16 and may include a receiver and/or a transmitter.
  • the functional circuitry 16 is operable to provide signals to, and/or receive signals from the radio circuitry 14.
  • the functional circuitry 16 may include a processor, a memory and input/output devices such as an aud io input device (a m icrophone for example), an audio output device (a loudspeaker for example) and a display.
  • the electron ic components that provide the radio circu itry 1 4 and the functional circuitry 16 may be interconnected via a printed wiring board (PWB) 18.
  • PWB printed wiring board
  • the printed wiring board 18 may be used as a ground plane for the apparatus 12 by using one or more layers of the printed wiring board 18, or some other conductive part of the electronic device 10 (a battery cover for example) may be used as a ground member for the apparatus 12.
  • the ground plane may also be formed from several conductive parts of the electronic device 10, for example and not limited to the PWB 18, a conductive battery cover, and at least a portion of an external conductive casing or housing of the device 10.
  • the apparatus 12 and the radio circuitry 14 may be configured to operate in a plurality of different operational frequency bands and via a plurality of different protocols.
  • the d ifferent operational 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); hyper local area network (HLAN) (51 50-5850 MHz); global positioning system (GPS) (1570.42-1580.42 MHz); US - Global system for mobile communications (US- GSM)
  • a frequency band over which an antenna can efficiently operate using a protocol is a frequency range where the antenna's return loss is greater than an operational threshold. For example, efficient operation may occur when the antenna's return loss is better than -6dB or -10dB.
  • Fig 2 illustrates a plan view of a first apparatus 1 21 according to various embodiments of the invention and a Cartesian co-ordinate axis 20.
  • the first apparatus 121 includes a first antenna 22, a second antenna 24 and a ground plane 1 8 (which may be planar or non-planar).
  • the Cartesian co-ordinate axis 20 includes an X axis 26 and a Y axis 28 which are orthogonal to one another.
  • the first antenna 22 is connected to a feed point 30 and extends from the feed point 30 in the +Y direction until an end portion, which may also be considered to be an Open' end of the first antenna 22.
  • the feed point 30 is connected to the radio circuitry 14 illustrated in fig. 1 and the first antenna 22 may receive signals for transmission from the feed point 30 and may provide received signals at the first antenna 22 to the radio circuitry 14 via the feed point 30.
  • the first antenna 22 is a planar inverted-L antenna (PILA) and may be (for example) a m on o po l e .
  • the first antenna 22 may also be connected to a ground point of the ground plane 18 and may be a planar inverted F antenna (PIFA) or a loop antenna.
  • the second antenna 24 includes a first portion 32 connected to a first ground point 34 of the ground plane 18, and a second portion 36 connected to a second ground point 38 of the ground plane 18.
  • the second antenna 24 has a loop structure between the first portion 32 and the second portion 36 and may be referred to as a 'loop antenna'.
  • the second antenna 24 is planar, but may be non-planar in other embodiments.
  • the second antenna 24 is in substantially the same plane as the first antenna 22 (that is, the first antenna 22 and the second antenna 24 are co-planar). In other embodiments, the first antenna 22 and the second antenna 24 may be positioned within different planes.
  • the second antenna 24 extends from the first ground point 34 along the first portion 32 in the +Y direction until point (a) where it makes a ninety degree left hand turn.
  • the second antenna 24 then extends from point (a) in the -X direction until point (b) where it makes a ninety degree right hand turn.
  • the second antenna 24 then extends from point (b) in the +Y direction until point (c) wherein it makes a ninety degree right hand turn.
  • the second antenna 24 then extends in the +X direction until point (d) where it makes a ninety degree right hand turn.
  • the second antenna 24 then extends in the -Y direction until point (e) where it makes a ninety degree right hand turn.
  • the second antenna 24 then extends in the -X direction until point (f) where it makes a ninety degree left hand turn and then extends in the -Y direction until reaching the second ground point 38 via the second portion 36.
  • the loop structure of the second antenna 24 defines a space 40 therein and the first antenna 22 is positioned with the space 40. Consequently, the apparatus 1 21 is relatively compact since the first antenna 22 may be positioned within the same surface area and/or volume occupied by the second antenna 24.
  • the first antenna 22 and the second antenna 24 overlay the ground plane 18 when viewed in plan view. In other embodiments, the first antenna 22 and/or the second antenna 24 may only partially overlay the ground plane 18 when viewed in plan view. In still other embodiments, the first antenna 22 and/or the second antenna 24 may not overlay the ground plane 18 when viewed in plan view.
  • the first antenna 22 and the second antenna 24 electromagnetically couple with one another and operate in a first frequency band.
  • the first antenna 22 may receive a signal from the radio circuitry 14 via the feed point 30 and radiate the signal as an electromagnetic wave.
  • the radiated electromagnetic wave excites the second antenna 24 and causes the second antenna 24 to also radiate an electromagnetic wave.
  • the first antenna 22 is configured to receive an electromagnetic wave and provide the electromagnetic wave to the radio circuitry 14 via the feed point 30 as a signal .
  • the second antenna 24 is also configured to receive the electromagnetic wave and excite the first antenna 22 so that the received electromagnetic signal may be provided to the radio circuitry 14. From the above, it should be appreciated that the second antenna 24 may be referred to as a 'parasitic antenna'.
  • the first antenna 22 is a monopole antenna
  • the first antenna 22 has an electrical length substantially equal to quarter of a wavelength of a second frequency band.
  • the second frequency band at least partially overlaps with the first frequency band mentioned above.
  • the physical length of the first antenna 22 may be substantially equal to quarter of the wavelength of the second frequency band and the first antenna 22 may conseq uently be resona nt in the second freq uency ba nd .
  • the physical length of the first antenna 22 may be different to a quarter of a wavelength of the second frequency band (for example, it may be less than a q uarter of a wavelength ) and th e fi rst anten na 22 may consequently be non-resonant in the second frequency band.
  • the first antenna 22 is connected to matching circuitry at the feed point 30 for changing the electrical length of the first antenna 22 so that it may operate in the second frequency band.
  • the first antenna 22 is a loop antenna
  • the first antenna 22 has an electrical length substantially equal to half of a wavelength of the second frequency band .
  • the physical length of the first antenna 22 may be substantially equal to half of a wavelength of the second frequency band and the first antenna 22 may consequently be resonant in the second frequency band. In other embodiments, the physical length of the first antenna 22 may be different to half of a wavelength of the second frequency band and the first antenna 22 may consequently be non-resonant in the second frequency band. In these embodiments, the first antenna 22 is connected to matching circuitry (at the feed point 30 for example) for changing the electrical length of the first antenna 22 so that it may operate in the second frequency band.
  • the second antenna 24 has an electrical length substantially equal to half of a wavelength of a third frequency band.
  • the third frequency band at least partially overlaps with the first frequency band and the second frequency band.
  • the physical length of the second antenna 24 may be substantially equal to half of a wavelength of the third frequency band and the second antenna 24 may consequently be resonant in the third frequency band.
  • the physical length of the second antenna 24 may be different to half of a wavelength of the third frequency band and the second antenna 22 may consequently be non-resonant in the third frequency band.
  • the second antenna 24 is connected to matching circuitry for chang ing the electrical length of the second antenna 22 so that it may operate in the third frequency band.
  • the first antenna 22 electromagnetically couples with the second antenna 24. Consequently, the combination of the first antenna 22 and the second antenna 24 are operable in the first frequency band, which may be considered as a combination of the second frequency band and the third frequency band. Furthermore, electromagnetic coupling may be increased by placing the first antenna 22 and the second antenna 24 in close proximity to one another. Additionally, the end portion of the first antenna 22 is positioned in close proximity to a portion of the second antenna 24 which is substantially half way between the first portion 32 and the second portion 36 of the second antenna 24. Since the end portion of the first antenna 22 and the half way portion of the second antenna 24 generate relatively high electric fields in operation, this arrangement may also increase electromagnetic coupling between the first antenna 22 and the second antenna 24.
  • Embodiments of the present invention provide an advantage in that the apparatus 121 may have a relatively large bandwidth.
  • the electrical lengths of the first and second antennas 22, 24 may be selected so that the second frequency band and the third frequency band are different to one another but overlap. Since the first frequency band is a combination of the second frequency band and the third frequency band, the first frequency band has a relatively large bandwidth which may cover one or more operational frequency bands. For example, the bandwidth of the first frequency band may be sufficiently large to enable the apparatus 10 to operate in WCDMA 1700/1900/2100 bands.
  • the bandwidth of the first frequency band and the efficiency of operation of the first apparatus 121 may be relatively unaffected when a user places the electronic device 10 against his head (to make a telephone call for example) since the ground plane 18 may reduce electromagnetic coupling between the first apparatus 121 and the user.
  • Fig. 3 illustrates a plan view of a second apparatus 122 according to various embodiments of the invention.
  • the second apparatus 122 is similar to the first apparatus 121 illustrated in fig. 2 and where the features are similar, the same reference numerals are used.
  • the second apparatus 122 differs from the first apparatus 121 in that the first antenna 22 and the second antenna 24 do not overlay the ground plane 18.
  • the ground plane 18 has a circumferential edge 42 and the first and second antennas 22, 24 are positioned outside of the circumferential edge 42 when the apparatus 122 is viewed in plan.
  • the apparatus 1 22 provides an advantage in that the non-overlaying arrangement of the first antenna 22 and the second antenna 24 with the ground plane 18 may result in the first frequency band having a larger bandwidth relative to the bandwidth of the first apparatus 121 illustrated in fig. 2.
  • Fig. 4 illustrates a plan view of a third apparatus 123 according to various embodiments of the invention.
  • the third apparatus 123 is similar to the first apparatus 121 illustrated in fig. 2 and where the features are similar, the same reference numerals are used.
  • the third apparatus 123 differs from the first apparatus 121 in that the loop structure of the second antenna 24 curves smoothly (instead of having ninety degree turns) and has the shape of an elliptical ring.
  • the third apparatus 123 also differs from the first apparatus 121 in that the first antenna 22 extends from the feed point 30 to the space 40 defined by the loop structure of the second antenna 24 and then has a sickle shape that corresponds with the curvature of the inside of the loop structure of the second antenna 24.
  • Fig. 5 illustrates a plan view of a fourth apparatus 124 according to various embodiments of the invention.
  • the fourth apparatus 124 is similar to the third apparatus 1 23 and where the features are similar, the same reference numerals are used.
  • the fourth apparatus 124 differs from the third apparatus 123 in that the first antenna 22 extends around the outside of the second antenna 24 (that is, the first antenna 22 is not positioned within the space 40 defined by the second antenna 24) and has a sickle shape that corresponds with the curvature of the outside of the loop structure of the second antenna 24.
  • Fig. 6 illustrates a plan view of a fifth apparatus 125 according to various embodiments of the invention.
  • the fifth apparatus 125 is similar to the third apparatus 1 23 and where the features are similar, the same reference numerals are used.
  • the fifth apparatus 125 differs from the third apparatus
  • the first antenna 22 is a planar inverted F antenna (PIFA) and is connected to a ground point 44 of a ground plane in addition to being connected to the feed point 30.
  • PIFA planar inverted F antenna
  • Fig. 7 illustrates a plan view of a sixth apparatus 126 according to various embodiments of the invention.
  • the sixth apparatus 126 is similar to the fourth apparatus 1 24 and where the features are similar, the same reference numerals are used.
  • the sixth apparatus 126 differs from the fourth apparatus
  • the first antenna 22 is a planar inverted F antenna (PIFA) and is connected to a ground point 44 of a ground plane in add ition to being connected to the feed point 30.
  • PIFA planar inverted F antenna
  • Fig. 8 illustrates a plan view of a seventh apparatus 127 according to various embodiments of the invention.
  • the seventh apparatus 127 is similar to the fifth apparatus 125 and where the features are similar, the same reference numerals are used.
  • the seventh apparatus 127 differs from the fifth apparatus 125 in that the first antenna 22 is a loop antenna which is connected to the feed point 30 at a first portion 46 and to the ground point 44 at a second portion 48.
  • the first antenna 22 has a loop structure between the first and second portions 46, 48 which extends into, and is positioned within, the space 40 defined by the second antenna 24.
  • the curvature of the loop structure of the first antenna 22 corresponds to the curvature of the inside of the loop structure of the second antenna 24.
  • a portion of the first antenna 22 substantially halfway between the first portion 46 and the second portion 48 is positioned in proximity to the portion of the second antenna 24 which is substantially halfway between the first portion 32 and the second portion 36 of the second antenna 24. Since the halfway portions of the first and second antennas 22, 24 generate relatively high el ectric fi eld s i n operation , th i s a rra ng em ent m ay a l so i n crease electromagnetic coupling between the first antenna 22 and the second antenna 24.
  • Fig. 9 illustrates a plan view of an eighth apparatus 128 according to various embodiments of the invention.
  • the eighth apparatus 128 is similar to the seventh apparatus 1 27 and where the features are sim ilar, the same reference numerals are used.
  • the eighth apparatus 128 is different to the seventh apparatus 127 in that the first antenna 22 is not positioned within the space 40 defined by the loop structure of the second antenna 24, but is instead positioned adjacent the right hand side of the second antenna 24. In other embodiments the first antenna 22 may be positioned adjacent the left hand side of the second antenna 24.
  • Fig. 10 illustrates a perspective view of a ninth apparatus 129 according to various embodiments of the invention and a Cartesian co-ordinate axis 50 which includes an X axis 52, a Y axis 54 and a Z axis 56 which are orthogonal to one another.
  • the ninth apparatus 129 is similar to the first apparatus 121 and where the features are similar, the same reference numerals are used.
  • the first antenna 22 and the second antenna 24 are provided on a support member 58 (for example, a dielectric antenna carrier).
  • the support member 58 is illustrated in this embodiment as a separate part from the PWB 18, but in other embodiments the support member 58 may be integrated into another part which may be the PWB 18 or alternatively the casing or housing of the apparatus 129.
  • the cores of the PWB 18 may provide the support required for the first and second antennas 22, 24 and the first and second antenna traces may be provided on one or more conductive layers of the PWB 1 8.
  • the first antenna 22 is provided on an upper surface of the support member 58 and lies in the X-Y plane. The first antenna 22 extends from the feed point 30 in the -Y direction and then makes a ninety degree right hand turn and extends in the -X direction until its end portion.
  • the second antenna 24 is provided on the upper surface and two side surfaces of the support member 58 and is consequently non-planar.
  • the second antenna 24 extends from the first portion 32 in the +X direction and then makes a ninety degree right hand turn and extends in the -Y direction.
  • the second antenna 24 then extends along a first side surface of the support member 58 in the X-Z plane and in the -X direction.
  • This section of the second antenna 24 also includes a patch portion which is provided on the upper surface of the support member 58 and is positioned between the portion of the first antenna 22 which extends in the -Y direction and the portion of the second antenna 24 which extends in the -Y direction.
  • the second antenna 24 then extends along a second side surface of the support member 58 that is angled in the +Y direction relative to the first side surface.
  • the second antenna 24 then extends towards the second portion 36 along the upper surface of the support member 58 and has a meandering shape. Consequently, the second antenna 24 has a loop structure between the first portion 32 and the second portion 36 and defines a space 40 therein.
  • the first antenna 22 is provided in the space 40 defined by the second antenna 24.
  • first antenna 22 and the second antenna 24 may be provided on the support member 58 in different arrangements.
  • first antenna 22 may be provided on the upper surface of the support member 58 and the second antenna 24 may be provided on the bottom surface of the support member 58.
  • This exemplary embodiment may provide an advantage in that the electromagnetic coupling between the first antenna 22 and the second antenna 24 may be tuned by controlling the depth of the support member 58 in manufacture.
  • the depth of the support member 58 may be selected in manufacture to obtain a desired electromagnetic coupling between the first and second antennas 22, 24.
  • Fig. 1 1 illustrates a graph of operating frequency versus return loss for the ninth apparatus 129 illustrated in fig. 10.
  • the graph includes a horizontal axis 60 for the operating frequency (in GHz) of the ninth apparatus 1 29 and a vertical axis 62 for the return loss (in dB).
  • the horizontal axis 60 has values of 1 .5 GHz to 2.4 GHz and the vertical axis 62 has values of 0 dB to -30dB.
  • the graph also includes a line 64 that shows how the return loss of the ninth apparatus 129 varies with operating frequency.
  • the line 64 starts at 1 .5 GHz with a return loss of -0.3dB.
  • the line 64 then has an increasingly negative gradient as operating frequency increases and reaches a minima at 1 .925 GHz with a return loss of -28dB.
  • the line 64 then has a decreasingly positive gradient as operating frequency increases and has a return loss of -10dB at 2.4 GHz.
  • embodiments of the present invention provide an advantage in that the operable bandwidth of the apparatus is relatively wide.
  • the ninth apparatus 129 is operable in at least GSM1800/1900 and WCDMA1700/1900/2100 bands. Fig.
  • the method includes providing the first antenna 22 and connecting the first antenna 22 to the feed point 30. Where the first antenna 22 is a planar inverted F antenna or a loop antenna, the method may also include connecting the first antenna 22 to a ground point.
  • the method includes providing the second antenna 24 and connecting the first portion 32 to the first ground point 34 and the second portion 36 to the second ground point 38.
  • the method includes configuring the first antenna 22 and the second antenna 24 to electromagnetically couple and operate in a first frequency band.
  • the first and second antennas 22, 24 may be placed in relatively close proximity to one another and the portions of the first and second antennas 22, 24 which have high electric fields in operation may be positioned in close proximity to one another. Additionally, the first and second antennas 22, 24 are configured so that their electrical lengths are resonant in overlapping frequency bands. This may be ach ieved by making the physical length of the first and second antennas 22, 24 the same as the desired electrical length or by connecting the first and second antennas 22, 24 to matching circuitry which provide them with the desired electrical lengths. It should be appreciated that block 70 may be performed at the same time as blocks 66 and 68.
  • the blocks illustrated in the Fig. 12 may represent steps in a method and/or sections of code in a computer program.
  • a controller may read the computer program and control machinery to manufacture the apparatus 12.
  • 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 block may be varied. Furthermore, it may be possible for some blocks to be omitted.
  • the loop structure of the second antenna 24 may have any suitable shape and may be circular or 'L' shaped when viewed in plan for example.
  • Features described in the preceding description may be used in combinations other than the combinations explicitly described.

Abstract

L'invention porte sur un appareil comprenant : une première antenne connectée à un point d'alimentation ; et une seconde antenne comprenant une première partie connectée à un premier point de masse et une seconde partie connectée à un second point de masse et ayant une structure en boucle entre la première partie et la seconde partie, la première antenne et la seconde antenne étant configurées pour être couplées électromagnétiquement et fonctionnent dans une première bande de fréquences.
PCT/IB2010/053804 2010-08-24 2010-08-24 Appareil et procédés pour une communication sans fil WO2012025787A1 (fr)

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PCT/IB2010/053804 WO2012025787A1 (fr) 2010-08-24 2010-08-24 Appareil et procédés pour une communication sans fil

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Application Number Priority Date Filing Date Title
PCT/IB2010/053804 WO2012025787A1 (fr) 2010-08-24 2010-08-24 Appareil et procédés pour une communication sans fil

Publications (1)

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WO2012025787A1 true WO2012025787A1 (fr) 2012-03-01

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US10262167B2 (en) 2008-01-31 2019-04-16 Smartrac Technology Fletcher, Inc. Detachable radio frequency identification switch tag
US10885418B2 (en) 2011-05-06 2021-01-05 Neology, Inc. Detachable radio frequency identification switch tag
US11334782B2 (en) 2011-05-06 2022-05-17 Neology, Inc. Detachable radio frequency identification switch tag
US11948035B2 (en) 2011-05-06 2024-04-02 Neology, Inc. RFID switch tag
US11775795B2 (en) 2011-05-06 2023-10-03 Neology, Inc. Detachable radio frequency identification switch tag
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US10671904B2 (en) 2011-05-06 2020-06-02 Neology, Inc. RFID switch tag
US10140568B2 (en) 2011-05-06 2018-11-27 Neology, Inc. RFID switch tag
US10147034B2 (en) 2011-05-06 2018-12-04 Neology, Inc. RFID switch tag
US10262253B2 (en) 2011-05-06 2019-04-16 Neology, Inc. RFID switch tag
US10102685B2 (en) 2011-05-06 2018-10-16 Neology, Inc. Self declaring device for a vehicle using restrict traffic lanes
US9257749B2 (en) * 2013-04-09 2016-02-09 Chiun Mai Communication Systems, Inc. Antenna assembly
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WO2015041525A1 (fr) * 2013-09-18 2015-03-26 N.V. Nederlandsche Apparatenfabriek "Nedap" Lecteur pour un système de contrôle d'accès uhf électronique
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NL2011462A (nl) * 2013-09-18 2015-03-19 Nedap Nv Zend/ontvanginrichting voor een elektronisch uhf toegangscontrolesysteem.
CN105449335A (zh) * 2014-08-20 2016-03-30 联想(北京)有限公司 一种电子设备
US10679115B2 (en) 2015-05-21 2020-06-09 Smartrac Technology Fletcher, Inc. Multi-frequency radio frequency identification tag
WO2016187589A1 (fr) * 2015-05-21 2016-11-24 Neology, Inc. Étiquette d'identification par radiofréquence multifréquence
US11403506B2 (en) 2015-05-21 2022-08-02 Neology, Inc. Detachable radio frequency identification switch tag
US11809937B2 (en) 2015-05-21 2023-11-07 Neology, Inc. Detachable radio frequency identification switch tag
US10339436B2 (en) 2015-05-21 2019-07-02 Smartrac Technology Fletcher, Inc. Multi-frequency radio frequency identification tag
CN106374226A (zh) * 2016-09-30 2017-02-01 深圳市信维通信股份有限公司 用于第五代无线通信的双频阵列天线
CN106374226B (zh) * 2016-09-30 2024-04-16 深圳市信维通信股份有限公司 用于第五代无线通信的双频阵列天线

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