EP1624523B1 - Dispositif d'antenne - Google Patents

Dispositif d'antenne Download PDF

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Publication number
EP1624523B1
EP1624523B1 EP20050012882 EP05012882A EP1624523B1 EP 1624523 B1 EP1624523 B1 EP 1624523B1 EP 20050012882 EP20050012882 EP 20050012882 EP 05012882 A EP05012882 A EP 05012882A EP 1624523 B1 EP1624523 B1 EP 1624523B1
Authority
EP
European Patent Office
Prior art keywords
conductive shield
circuit board
printed circuit
antenna device
connection portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20050012882
Other languages
German (de)
English (en)
Other versions
EP1624523A1 (fr
Inventor
Ten-Long Deng
Hsiao-Ming Tsai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asustek Computer Inc
Original Assignee
Asustek Computer Inc
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 Asustek Computer Inc filed Critical Asustek Computer Inc
Publication of EP1624523A1 publication Critical patent/EP1624523A1/fr
Application granted granted Critical
Publication of EP1624523B1 publication Critical patent/EP1624523B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields

Definitions

  • the invention relates in general to an antenna device and in particular to an antenna device with improved reception.
  • Embedded antennas such as chip antennas and planar antennas, are widely applied to wireless communication devices.
  • One conventional chip antenna is a ceramic chip antenna produced by LTCC (Low Temperature Co-fired Ceramic) technology.
  • Conventional planar antennas such as microstrip antennas, printed antennas and Planar Inverted F Antennas (PIFAs), are generally applied in GSM 'DCS 'UMTS' WLAN and bluetooth wireless equipment such as mobile phones and wireless LAN adapters.
  • a conventional wireless communication device 10 with PIFA such as a wireless LAN adapter, primarily comprises a plastic housing C and a printed circuit board 20 disposed therein.
  • the housing C encloses the printed circuit board 20 with PIFA structure formed thereon for transmitting and receiving radio signals.
  • the printed circuit board 20 features a conventional PIFA structure, comprising a substrate 200, a feed line 201, a short line 202, a longitudinal wire 203 and a ground G.
  • the longitudinal wire 203 has an open end 2030 and a closed end 2031 connecting the short line 202.
  • the short line 202 connects the closed end 2031 with the ground G, and the feed line 201 is extended from the middle part of the longitudinal wire 203 to an external circuit (not shown).
  • the feed line 201 and the ground G are insulated, and the distance from the open end 2030 to the closed end 2031 is substantially equal to 1/4 of a radio signal wavelength.
  • the PIFA structure including the feed line 201, short line 202, longitudinal wire 203 and ground G is formed on the substrate 200 surface, however, it is suitable for horizontally polarized radio waves but not preferable for receiving vertically polarized radio signals.
  • US-B1-6 392 603 discloses an antenna device according to the preamble of claim 1.
  • US-A-4 975 711 describes an antenna device with a shield that defines two slots that are inclined relative to one another, so that slot antenna are formed for receiving both, horizontally and vertically polarized radio signals.
  • An antenna device according to the invention is specified in claim 1.
  • Embodiments of the invention provide an antenna device.
  • the antenna device comprises a printed circuit board, a conductive shield, a first connection portion and a second connection portion.
  • the printed circuit board comprises a feed point and a ground plane insulated from the feed point.
  • the conductive shield surrounds the printed circuit board.
  • the first connection portion is substantially perpendicular to the printed circuit board, electrically connecting the feed point and the conductive shield.
  • the second connection portion is substantially perpendicular to the printed circuit board, electrically connecting the ground plane and the conductive shield.
  • the antenna device is applied to a wireless communication device, such as a mobile phone or a wireless LAN adapter, and primarily comprises a printed circuit board P, a metallic conductive shield C, a first connection portion A1 and a second connection portion A2.
  • the printed circuit board P comprises signal processing circuits and radio communication circuits.
  • the rectangular metallic conductive shield C is hollow and extends along a central axis X thereof, consisting of four conductive plates C1, C2, C3 and C4 surrounding the printed circuit board P.
  • the hollow conductive shield C defines a rectangular opening C0 with the central axis X passing therethrough, and the printed circuit board P is disposed in the conductive shield C and parallel to the central axis X.
  • the printed circuit board P of the antenna device is electrically connected with the conductive shield C by the longitudinal first and second connection portions A1 and A2, forming a 3-D antenna structure.
  • the longitudinal first and second connection portions A1 and A2 are disposed perpendicular to the printed circuit board P and the conductive plate C1.
  • the first connection portion A1 electrically connects a feed point F of the printed circuit board P
  • the second connection portion A2 electrically connects a ground plane G of the printed circuit board P, wherein the feed point F and the ground plane G are insulated.
  • the first and second connection portions A1 and A2 are extended upward from the printed circuit board P to the conductive shield C forming a 3-D antenna structure, capable of receiving vertically polarized signal thereby providing omnidirectional communication.
  • the length of the conductive shield C along X axis can be appropriately determined for receiving radio signals of specific frequency.
  • the reception efficiency for vertically polarized radio signals is thereby improved.
  • embodiments of the invention provide an antenna device facilitating the reception efficiency with respect to vertically polarized radio signals.
  • Embodiments of the invention are suitable for application in wireless communication devices, such as mobile phones and wireless LAN adapters.
  • the metallic conductive shield C not only has a specific metal texture, but also provides better structural strength than the conventional plastic housing.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)

Claims (6)

  1. Un dispositif d'antenne, comprenant :
    une plaquette de circuit imprimé (P), comprenant un point d'alimentation (F) et un plan de masse (G) isolé du point d'alimentation (F);
    un blindage conducteur (C) s'étendant le long d'un axe (X); et
    une première partie de connexion (A1) qui est sensiblement perpendiculaire à la plaquette de circuit imprimé (P) et connecte électriquement le point d'alimentation (F) et le blindage conducteur (C);
    caractérisé en ce que le blindage conducteur (C) entoure et contient entièrement la plaquette de circuit imprimé (P), la longueur du blindage conducteur (C) le long de l'axe (X) étant déterminée pour recevoir des signaux radio d'une fréquence spécifique; et
    une deuxième partie de connexion (A2) est disposée de façon sensiblement perpendiculaire à la plaquette de circuit imprimé (P) et connecte électriquement le plan de masse (G) et le blindage conducteur (C), en formant ainsi une structure d'antenne 3-D avec la première partie de connexion (A1), le blindage conducteur (C) et la plaquette de circuit imprimé (P).
  2. Le dispositif d'antenne selon la revendication 1, dans lequel le blindage conducteur (C) comprend une ouverture (C0) à travers laquelle passe l'axe (X).
  3. Le dispositif d'antenne selon la revendication 2, dans lequel la plaquette de circuit imprimé (P) est parallèle à l'axe (X).
  4. Le dispositif d'antenne selon la revendication 2, dans lequel les première et deuxième parties de connexion (A1, A2) sont perpendiculaires à une partie du blindage conducteur (C) qui leur est adjacente.
  5. Le dispositif d'antenne selon la revendication 1, dans lequel le blindage conducteur est métallique.
  6. Le dispositif d'antenne selon la revendication 2, dans lequel l'ouverture (C0) est rectangulaire.
EP20050012882 2004-08-03 2005-06-15 Dispositif d'antenne Active EP1624523B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200410563686 2004-08-03

Publications (2)

Publication Number Publication Date
EP1624523A1 EP1624523A1 (fr) 2006-02-08
EP1624523B1 true EP1624523B1 (fr) 2008-03-26

Family

ID=34937469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050012882 Active EP1624523B1 (fr) 2004-08-03 2005-06-15 Dispositif d'antenne

Country Status (2)

Country Link
EP (1) EP1624523B1 (fr)
DE (1) DE602005005576T2 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920002439B1 (ko) * 1988-08-31 1992-03-24 삼성전자 주식회사 휴대용 무선전화기의 슬로트 안테나 장치
JPH06260949A (ja) * 1993-03-03 1994-09-16 Seiko Instr Inc 無線機器
SE522419C2 (sv) * 1999-10-29 2004-02-10 Ericsson Telefon Ab L M Modulantenn
US20040082309A1 (en) * 2002-10-29 2004-04-29 Smith Freddie W. Printer
JP3925420B2 (ja) * 2003-02-07 2007-06-06 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 携帯無線機

Also Published As

Publication number Publication date
DE602005005576D1 (de) 2008-05-08
DE602005005576T2 (de) 2009-05-07
EP1624523A1 (fr) 2006-02-08

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