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WO2001091233A1 - Antenne multibande - Google Patents

Antenne multibande Download PDF

Info

Publication number
WO2001091233A1
WO2001091233A1 PCT/EP2001/005618 EP0105618W WO0191233A1 WO 2001091233 A1 WO2001091233 A1 WO 2001091233A1 EP 0105618 W EP0105618 W EP 0105618W WO 0191233 A1 WO0191233 A1 WO 0191233A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
conductor portion
band
cpl
antenna according
Prior art date
Application number
PCT/EP2001/005618
Other languages
English (en)
Inventor
Zhinong Ying
Anders DAHLSTRÖM
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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
Priority claimed from EP00610112A external-priority patent/EP1168491B1/fr
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to AU2001267447A priority Critical patent/AU2001267447A1/en
Publication of WO2001091233A1 publication Critical patent/WO2001091233A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/005—Patch antenna using one or more coplanar parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • 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
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element

Definitions

  • the invention relates to antennas for use in portable communications devices such as mobile telephones.
  • Portable communications devices are required to be compact in size, which is a requirement that applies to every component of the devices, including the antenna.
  • Modern mobile telephones use two or more distinct frequency bands, and preferably one and the same antenna is required to operate in all frequency bands used by the telephone.
  • the GSM band centred on the frequency 900 MHz the DSC band centred on 1800 MHz
  • the PCS band centred on 1900 MHz The 900 MHz and 1800 MHz frequency bands are separated by one octave, whereas the 1800 MHz and 1900 MHz frequency bands are separated by only a fraction of one octave.
  • the antenna has separate portions tuned to respective ones of the two frequency bands, since it is not considered feasible to have one and the same portion of the antenna tuned to a frequency band of more than, one octave with a relatively large unused frequency band between the useful frequency bands.
  • the invention provides an antenna for use in eg portable communications devices such as mobile telephones.
  • the antenna is useful in a low frequency band and two high frequency bands, where the two high frequency bands are relatively closer to each other than to the low frequency band.
  • the antenna is thus effectively a triple band antenna, and a mobile telephone having such an antenna is thus useful in three frequency bands such as the above identified three frequency bands centred on 900 MHz, 1800 MHz and 1900 MHz respectively.
  • the invention is not restricted to the use in the above-identified frequency bands, but will be suitable for use in existing and future frequency bands as well.
  • Figure 1 schematically shows a known dual band antenna electrically connected to a printed circuit board
  • Figure 2 schematically shows a preferred embodiment of a triple band antenna of the invention electrically connected to a printed circuit board
  • Figure 3 is an end view of the antenna and printed circuit board of figure 2
  • Figure 4 schematically shows the printed circuit board with 1 the antenna in figure 2, and
  • Figure 5 is a diagram showing a typical return loss for an antenna according to the invention.
  • FIGS 2-4 a printed circuit board PCB with an antenna according to the invention for use in a mobile telephone is shown.
  • the printed circuit board has a rectangular shape, and the invention is not restricted to the use of a rectangular shape.
  • the printed circuit board will have a number of electronic components mounted thereon, which are necessary for the operation of the mobile telephone, but which are not part of the invention. In figure 4 such components are therefore indicated only schematically.
  • an electrically conductive material such as copper, constitutes the antenna of the invention.
  • the antenna is preferably spaced from the printed circuit board PCB with a predetermined distance therebetween.
  • a first conductor portion CPl which is rectilinear in this embodiment, has a grounding point with a first grounding post GPl at a first end of the first conductor portion CPl.iln use the grounding point will be electrically connected through the first grounding post GPl to ground potential at the printed circuit board PCB.
  • the first conductor portion CP1 has a feeding point with a feeding post FP electrically connecting the first conductor portion CP1 to an electronic circuit on the PCB for feeding the antenna with signals to be transmitted by the antenna, and/or to electronic circuitry for receiving signals received by the antenna.
  • the portion of the first conductor portion CP1 situated between the feeding post FP and the first grounding post GPl functions as a matching bridge MB.
  • a low band portion LB branches off at one side of the straight first conductor portion CP1 and forms a spiral.
  • three rectilinear segments forming right angles with each other constitute the low band spiral.
  • the innermost segment in the spiral is wider than the remaining three rectilinear segments including the conductor portion CP1.
  • a first high band portion HBl also forming a spiral, branches off at a right angle and at the same side as the low band portion LB.
  • the first high band spiral is also constituted by three rectilinear segments forming right angles with each other.
  • the segments constituting the first high band spiral have substantially equal widths.
  • the low band portion LB of the antenna is tuned to have a relatively low resonance frequency, such as 900 MHz, and a predefined bandwidth to define a low frequency band of the antenna.
  • the low resonance frequency is mainly determined or influenced by the length of the low band portion LB measured from the feeding point FP to the inner end of the spiral, which length corresponds to one quarter of a wavelength at the low resonance frequency.
  • the first high band portion HBl of the antenna is tuned to have a first high resonance frequency, such as 1800 MHz, , and predefined bandwidth to define a first high frequency band.
  • the first high resonance frequency is mainly determined or influenced by the length of the first high band portion HBl measured from the feeding point FP to the inner end of the spiral, which length corresponds to one quarter of a wavelength at the first high resonance frequency.
  • the low band portion LB and the first high band portion HBl of the antenna form a dual band antenna which is usable in mobile telephones operating in two frequency bands such as 900 MHz and 1800 MHz.
  • the antenna also has a second high band portion HB2 in the form of a second conductor portion CP2 arranged in a parallel relationship to the first conductor portion CP1 and at a predetermined distance therefrom.
  • the second high band portion HB2 has a grounding point electrically connected through a second grounding post GP2 to ground potential on the PCB.
  • the second grounding post GP2 is arranged in close vicinity of the feeding post FP, preferably at a distance of 0.5 mm, or at least in the range between 0.1 mm and 1.0 mm.
  • the second high band portion HB2 of the antenna is tuned to have a second high resonance frequency, such as 1900 MHz, and predefined bandwidth to define a second high frequency band.
  • the second high resonance frequency is mainly determined or influenced by the length of the second conductor portion CP2, which corresponds to one quarter of a wavelength at the second high, frequency, and the capacitive coupling between the first conductor portion CPl and the second conductor portion CP2.
  • the first high band portion HBl of the antenna can be tuned to the higher one of the two high band resonance frequencies - here 1900 MHz, and the second high band portion HB2 of the antenna can be tuned to the lower one of the two high band resonance frequencies - here 1800 MHz.
  • the first high band portion HBl of the antenna is arranged on one side of the first linear conductor portion CPl, and the second high band portion HB2 of the antenna is arranged on the opposite side of first linear conductor portion CPl.
  • interference between the two high frequency bands is reduced to • a minimum.
  • the active portions of the antenna (including the linear conductor portions CPl and CP2, the low and high band portions LB, HBl and HB2) are spaced from the printed circuit board PCB.
  • the dielectric substrate DE In the space between the active portions of the antenna and the PCB there is a dielectric substrate DE with. physical dimensions and specific dielectric properties selected for the proper functioning of the antenna.
  • the thickness of the dielectric substrate DE is not necessarily the same as the distance separating the active portions of the antenna from the printed circuit board PCB.
  • the active portions of the antenna When used in a mobile telephone, the active portions of the antenna may be placed close to the inner side of a housing wall of the telephone or even fixed or secured thereto, eg by gluing. In such case the dielectric properties of the housing material and their influence on the functioning of the antenna should be taken into account .
  • FIG 5 is shown a typical return loss for a multi frequency band antenna according to the invention.
  • the return loss is here expressed as the voltage standing wave; ratio (VSWR) of the antenna drawn on a linear frequency scale from 500 MHz to 2.5 GHz.
  • the return loss has one distinct minimum at a low frequency band and two minima at two high frequency bands HFl and HF2 relatively close to each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne une antenne multibande possédant une partie de bande basse (LB) accordée à une bande basse fréquence, ainsi qu'une première portion de bande haute (HB1) accordée à une première bande haute fréquence, à des fréquences plus élevées que la bande basse fréquence. Cette partie de bande basse (LB) et la première portion de bande haute (HB1) possèdent un premier point de masse commun (GP1), un point d'alimentation commun (FP) pour fournir des signaux d'entrée à l'antenne, ou pour émettre en sortie des signaux depuis l'antenne, et une première portion de conducteur (CP1), laquelle forme une partie de la portion de bande basse (LB) et de la première portion de bande haute (HB1). La première portion de conducteur (CP1) est reliée électriquement au premier point de masse (GP1) et au point d'alimentation commun (FP). Une deuxième portion de bande haute (HB2) est reliée à la première portion de conducteur (CP1) et accordée à une deuxième bande haute fréquence à une fréquence plus élevée que la bande basse fréquence et différente de la première bande haute fréquence. Cette antenne peut être accordée, par ex. aux fréquences de 900 MHz, 1800 Mhz et 1900 MHz, qui sont actuellement utilisées pour les téléphones mobiles.
PCT/EP2001/005618 2000-05-23 2001-05-16 Antenne multibande WO2001091233A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001267447A AU2001267447A1 (en) 2000-05-23 2001-05-16 Multi frequency-band antenna

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DKPA200000820 2000-05-23
DKPA200000820 2000-05-23
EP00610112A EP1168491B1 (fr) 2000-05-23 2000-11-01 Antenne pour plusieurs fréquences
EP00610112.5 2000-11-01
US24674900P 2000-11-09 2000-11-09
US60/246,749 2000-11-09

Publications (1)

Publication Number Publication Date
WO2001091233A1 true WO2001091233A1 (fr) 2001-11-29

Family

ID=27222394

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/005618 WO2001091233A1 (fr) 2000-05-23 2001-05-16 Antenne multibande

Country Status (2)

Country Link
AU (1) AU2001267447A1 (fr)
WO (1) WO2001091233A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078124A1 (fr) * 2001-03-22 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Dispositif de communication mobile
EP1359638A1 (fr) * 2002-05-02 2003-11-05 Sony Ericsson Mobile Communications AB Antenne imprimée et incorporée dans une appareil de communication électronique portable
WO2003094289A1 (fr) * 2002-05-02 2003-11-13 Sony Ericsson Mobile Communications Ab Antenne incorporee a circuits imprimes destinee a un appareil de communication electronique portable
US6734825B1 (en) 2002-10-28 2004-05-11 The National University Of Singapore Miniature built-in multiple frequency band antenna
US6876329B2 (en) 2002-08-30 2005-04-05 Filtronic Lk Oy Adjustable planar antenna
EP1719203A1 (fr) * 2004-02-23 2006-11-08 Nokia Corporation Agencement d'antenne a reception simultanee
US7856259B2 (en) 2007-08-29 2010-12-21 Sony Ericsson Mobile Communications Ab In-built FM antenna
TWI508375B (zh) * 2009-12-30 2015-11-11 Chi Mei Comm Systems Inc 天線模組
US9899737B2 (en) 2011-12-23 2018-02-20 Sofant Technologies Ltd Antenna element and antenna device comprising such elements
US10211519B2 (en) 2005-10-14 2019-02-19 Fractus, S.A. Slim triple band antenna array for cellular base stations
CN109478722A (zh) * 2016-07-22 2019-03-15 微软技术许可有限责任公司 具有多个谐振耦合回路的天线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332139A2 (fr) * 1988-03-10 1989-09-13 Kabushiki Kaisha Toyota Chuo Kenkyusho Antenne à large bande pour communications mobiles
EP0942488A2 (fr) * 1998-02-24 1999-09-15 Murata Manufacturing Co., Ltd. Dispositif d'antenne et appareil radio l'utilisant
WO2000003452A1 (fr) * 1998-07-09 2000-01-20 Telefonaktiebolaget Lm Ericsson (Publ) Antenne double bande en spirale, jumelee, a circuits imprimes
WO2000036700A1 (fr) * 1998-12-16 2000-06-22 Telefonaktiebolaget Lm Ericsson (Publ) Antenne multibande a plaque imprimee

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332139A2 (fr) * 1988-03-10 1989-09-13 Kabushiki Kaisha Toyota Chuo Kenkyusho Antenne à large bande pour communications mobiles
EP0942488A2 (fr) * 1998-02-24 1999-09-15 Murata Manufacturing Co., Ltd. Dispositif d'antenne et appareil radio l'utilisant
WO2000003452A1 (fr) * 1998-07-09 2000-01-20 Telefonaktiebolaget Lm Ericsson (Publ) Antenne double bande en spirale, jumelee, a circuits imprimes
WO2000036700A1 (fr) * 1998-12-16 2000-06-22 Telefonaktiebolaget Lm Ericsson (Publ) Antenne multibande a plaque imprimee

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078124A1 (fr) * 2001-03-22 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Dispositif de communication mobile
US6950065B2 (en) 2001-03-22 2005-09-27 Telefonaktiebolaget L M Ericsson (Publ) Mobile communication device
US7081854B2 (en) 2002-05-02 2006-07-25 Sony Ericsson Mobile Communications Ab Printed built-in antenna for use in a portable electronic communication apparatus
EP1359638A1 (fr) * 2002-05-02 2003-11-05 Sony Ericsson Mobile Communications AB Antenne imprimée et incorporée dans une appareil de communication électronique portable
WO2003094289A1 (fr) * 2002-05-02 2003-11-13 Sony Ericsson Mobile Communications Ab Antenne incorporee a circuits imprimes destinee a un appareil de communication electronique portable
US6876329B2 (en) 2002-08-30 2005-04-05 Filtronic Lk Oy Adjustable planar antenna
US6734825B1 (en) 2002-10-28 2004-05-11 The National University Of Singapore Miniature built-in multiple frequency band antenna
EP1719203A1 (fr) * 2004-02-23 2006-11-08 Nokia Corporation Agencement d'antenne a reception simultanee
US10211519B2 (en) 2005-10-14 2019-02-19 Fractus, S.A. Slim triple band antenna array for cellular base stations
US10910699B2 (en) 2005-10-14 2021-02-02 Commscope Technologies Llc Slim triple band antenna array for cellular base stations
US7856259B2 (en) 2007-08-29 2010-12-21 Sony Ericsson Mobile Communications Ab In-built FM antenna
TWI508375B (zh) * 2009-12-30 2015-11-11 Chi Mei Comm Systems Inc 天線模組
US9899737B2 (en) 2011-12-23 2018-02-20 Sofant Technologies Ltd Antenna element and antenna device comprising such elements
CN109478722A (zh) * 2016-07-22 2019-03-15 微软技术许可有限责任公司 具有多个谐振耦合回路的天线

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Publication number Publication date
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