WO2002063715A1 - Antenne a plaque pour blue tooth et wlan - Google Patents

Antenne a plaque pour blue tooth et wlan Download PDF

Info

Publication number
WO2002063715A1
WO2002063715A1 PCT/SE2001/000950 SE0100950W WO02063715A1 WO 2002063715 A1 WO2002063715 A1 WO 2002063715A1 SE 0100950 W SE0100950 W SE 0100950W WO 02063715 A1 WO02063715 A1 WO 02063715A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
metal layers
card
patch antenna
pcb
Prior art date
Application number
PCT/SE2001/000950
Other languages
English (en)
Inventor
Shaofang Gong
Johan Nilsson
Original Assignee
Bluetronics Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bluetronics Ab filed Critical Bluetronics Ab
Publication of WO2002063715A1 publication Critical patent/WO2002063715A1/fr

Links

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
    • H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
    • 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
    • H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
    • 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
    • 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
    • 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
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line

Definitions

  • the present invention relates to a so-called patch antenna for the so-called Blue Tooth concept and the so-called wireless-LAN concept (WLAN).
  • WLAN wireless-LAN concept
  • the main purpose of the Blue Tooth concept is to replace cables with radio signals where the required range is relatively short.
  • the main purpose of WLAN is to obtain wireless access to the Internet.
  • WLAN has a much higher data transmission capacity than Blue Tooth.
  • the nominal link distance in Blue Tooth is from 10 centimetres to 10 metres, but can be increased up to 100 metres by increasing transmission power.
  • WLAN also requires a communications distance of 100 metres.
  • antennas that are omnidirectional, that are small, and that can be integrated in modules in order to keep both size and costs low.
  • the aforesaid patent relates to a module for radio communication in accordance with the Blue Tooth concept and/or in accordance with the wireless-LAN concept that includes a transmitter and receiver circuit and an antenna.
  • the module further includes a carrier in the form of a laminated PCB-card (Printed Circuit Board) which has a number of electrically conductive metal layers and so-called microvias, where an integrated antenna is formed in the metal layer on a first side of the card and connected to the remainder of the module.
  • a radio frequency chip is surface-mounted on the other side of the card.
  • the module also includes passive components, such as filters, Baluns, inductors and capacitors, integrated in the PCB-card and connected to various microvias.
  • the present invention relates to an antenna of particular design for achieving the aforesaid requirements.
  • the present invention thus relates to a patch antenna for radio communication in accordance with the Blue Tooth concept and/or the WLAN concept, as well as 3G-GSM and other corresponding communications system, said antenna being integrated in a
  • the module includes a carrier in the form of a
  • PCB-card (Printed Circuit Board) that has a plurality of electrically conductive metal layers and so-called microvias, where as first side of the card is its antenna side and its other side is its component side, and where vias extend in the card between different metal layers, and wherein the module is characterised in that the antenna is comprised of two or more metal layers; in that the antenna supply point includes a part of a metal layer; in that a gap is situated between said part and the remainder of the metal layer; in that said part is connected to the component side of the card through the medium of a via and in that the capacitance between said part and the antenna forming metal layers is so adapted to the inductance caused by the connection of the via to said part that an essentially pure resistive impedance is obtained in the supply point.
  • the antenna is comprised of two or more metal layers
  • the antenna supply point includes a part of a metal layer; in that a gap is situated between said part and the remainder of the metal layer; in that said part is connected to the component side of the card through the
  • FIG. 1 and 2 illustrate a first embodiment of an inventive antenna from above and in cross-section respectively
  • FIG. 3 and 4 illustrate a second embodiment of an inventive antenna from above and in cross-section respectively
  • the drawings illustrate a patch antenna for radio communication in accordance with the Blue Tooth concept and/or the WLAN concept, as well as 3G-GSM and other corresponding communications systems. Examples of further systems are HiperLAN2 and HomeRF.
  • the antenna is integrated in a transmitter and receiver module, where the module has a carrier in the form of a laminated PCB-card 1 (Printed Circuit Board) which includes a number of electrically metal layers 2; 3; 4 and so-called vias.
  • a carrier in the form of a laminated PCB-card 1 (Printed Circuit Board) which includes a number of electrically metal layers 2; 3; 4 and so-called vias.
  • Reference 17 denotes a microvia and reference 18 denotes a through-passing via.
  • a first side 19 of the card 1 is its antenna side, while the other side 20 is its component side.
  • the antenna is comprised of two or more of said metal layers 2; 3; 4.
  • the antenna supply point 21 includes a part 22 of a metal layer.
  • a gap 23 is present between said part 22 and the remainder of said metal layer.
  • This part of the metal layer is connected to the component side 20 of the card through the medium of a via 18.
  • the capacitance between said part 22 and those metal layers that form the antenna is so adapted to the inductance that arises as a result of the connection of the microvia 18 to said part 22 that an essentially pure resistive impedance is obtained in the measuring point 21.
  • the resistive impedance will preferably be about 50 ⁇ .
  • An antenna which is supplied directly from a via i.e. an antenna of the kind taught by the aforesaid Swedish patent specification, gives a bandwidth of about 4%.
  • An antenna constructed in accordance with the present invention provides a bandwidth of about 6%, i.e. an enhancement of 50%.
  • the ⁇ sign in the figures identifies the wavelength at which the antenna operates.
  • said part 22 is rectangular in shape, although it may have other shapes.
  • the metal layers from which the antenna is formed are also rectangular.
  • the PCB-card has four strata 4 of mutually parallel metal layers.
  • the metal layer 14 is an earth plane.
  • the antenna is formed on said antenna side by two metal layers 5, 6.
  • the PCB-card has six strata of mutually parallel metal layers 2, where three of said layers, 7-9, form the antenna on said antenna side 19. Two metal layers may also form an antenna.
  • the PCB-card has eight strata 3 of mutually parallel metal layers, of which four, 10-13, of said layers form an antenna on said antenna side 19.
  • the antenna may comprise two or three metal layers.
  • Figure 7 illustrates an example where more than one antenna is used.
  • the configuration shown in Figure 7 can be used for WLAN modules, which require antenna diversity since the antennas have two orthogonal polarisations.
  • two or more antennas can be configured in a number of ways.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

L'invention concerne une antenne à plaque pour communication radio selon le concept Blue Tooth et/ou le concept WLAN, ainsi que 3G-GSM et autres systèmes de communication correspondants, dans laquelle l'antenne est intégrée dans un module émetteur et récepteur, le module présentant un support sous forme d'une carte PCB stratifiée (plaque de circuit imprimé) comprenant une pluralité de couches métalliques électriquement conductrices (2 ; 3 ; 4) et des éléments dits « microvias » (17), où une première face (19) de la carte est sa face antenne, et son autre face (20) est sa face composant, et où les vias s'étendent entre des couches métalliques différentes. L'invention est caractérisée en ce que l'antenne comprend deux ou plusieurs couches métalliques (2 ; 3 ; 4) ; en ce que le point d'alimentation (21) de l'antenne comprend une partie (22) d'une couche métallique ; en ce qu'il est prévu un espace (23) entre ladite partie (22) et le reste de la couche métallique ; en ce que ladite partie (22) est connectée à la face du composant (20) de ladite carte par l'intermédiaire d'un via (18) ; et en ce que la capacitance entre ladite partie et lesdites couches métalliques formant l'antenne est adaptée à l'inductance qui se produit à la suite de la connexion du via (18) à ladite partie (22), une impédance généralement purement résistive étant obtenue audit point d'alimentation (21).
PCT/SE2001/000950 2001-02-05 2001-05-03 Antenne a plaque pour blue tooth et wlan WO2002063715A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0100349A SE518467C2 (sv) 2001-02-05 2001-02-05 Patchantenn för bluetooth och WLAN
SE0100349-0 2001-02-05

Publications (1)

Publication Number Publication Date
WO2002063715A1 true WO2002063715A1 (fr) 2002-08-15

Family

ID=20282847

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/000950 WO2002063715A1 (fr) 2001-02-05 2001-05-03 Antenne a plaque pour blue tooth et wlan

Country Status (2)

Country Link
SE (1) SE518467C2 (fr)
WO (1) WO2002063715A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2424122A (en) * 2004-12-29 2006-09-13 Agilent Technologies Inc Non-resonant antennas embedded in wireless peripherals
US8738103B2 (en) 2006-07-18 2014-05-27 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904965A (en) * 1988-12-27 1990-02-27 Raytheon Company Miniature circulator for monolithic microwave integrated circuits
US5220334A (en) * 1988-02-12 1993-06-15 Alcatel Espace Multifrequency antenna, useable in particular for space telecommunications
EP0823749A1 (fr) * 1996-08-08 1998-02-11 E-Systems Inc. Antenne à microbande intégrée de type pavé
US6061025A (en) * 1995-12-07 2000-05-09 Atlantic Aerospace Electronics Corporation Tunable microstrip patch antenna and control system therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220334A (en) * 1988-02-12 1993-06-15 Alcatel Espace Multifrequency antenna, useable in particular for space telecommunications
US4904965A (en) * 1988-12-27 1990-02-27 Raytheon Company Miniature circulator for monolithic microwave integrated circuits
US6061025A (en) * 1995-12-07 2000-05-09 Atlantic Aerospace Electronics Corporation Tunable microstrip patch antenna and control system therefor
EP0823749A1 (fr) * 1996-08-08 1998-02-11 E-Systems Inc. Antenne à microbande intégrée de type pavé

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2424122A (en) * 2004-12-29 2006-09-13 Agilent Technologies Inc Non-resonant antennas embedded in wireless peripherals
US7515106B2 (en) 2004-12-29 2009-04-07 Avago Technologies General Ip (Singapore) Pte. Ltd. Non-resonant antennas embedded in wireless peripherals
US8738103B2 (en) 2006-07-18 2014-05-27 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US9099773B2 (en) 2006-07-18 2015-08-04 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US9899727B2 (en) 2006-07-18 2018-02-20 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US10644380B2 (en) 2006-07-18 2020-05-05 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11031677B2 (en) 2006-07-18 2021-06-08 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11349200B2 (en) 2006-07-18 2022-05-31 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11735810B2 (en) 2006-07-18 2023-08-22 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices

Also Published As

Publication number Publication date
SE0100349D0 (sv) 2001-02-05
SE0100349L (sv) 2002-08-06
SE518467C2 (sv) 2002-10-15

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