Title:
DUAL BAND ANTENNA SYSTEM WITH DIVERSITY
Document Type and Number:
WIPO Patent Application WO/2004/105182
Kind Code:
A1
Abstract:
There is disclosed an antenna device comprising a dielectric substrate (1) with first and second opposed surfaces. A conductive ground plane (2) is formed on a first area of the second surface of the substrate (1), leaving a second area of the second surface blank. At least two conductive feedlines (15, 16) are formed on the first surface of the substrate (1) and, extend from an area corresponding to the first area of the second surface to an area corresponding to the second area of the second surface. Each feedline (15, 16) is provided with a dielectric element (19, 20) in the area corresponding to the second area of the second surface, and at least one slot or discontinuity (23, 24, 25) is formed in the conductive ground plane (2) at an interface (14) between the first and second areas in a region between the feedlines (15, 16). The antenna device displays good dual band operation with good diversity and isolation between the antenna elements.
Inventors:
KINGSLEY JAMES WILLIAM (GB)
MORGANS CHRISTOPHER (GB)
BAGGALEY RICHARD (GB)
MARTIN STEVEN (GB)
WYATT ANDREW (GB)
KINGSLEY SIMON PHILIP (GB)
MORGANS CHRISTOPHER (GB)
BAGGALEY RICHARD (GB)
MARTIN STEVEN (GB)
WYATT ANDREW (GB)
KINGSLEY SIMON PHILIP (GB)
Application Number:
PCT/GB2004/002133
Publication Date:
December 02, 2004
Filing Date:
May 18, 2004
Export Citation:
Assignee:
ANTENOVA LTD (GB)
KINGSLEY JAMES WILLIAM (GB)
MORGANS CHRISTOPHER (GB)
BAGGALEY RICHARD (GB)
MARTIN STEVEN (GB)
WYATT ANDREW (GB)
KINGSLEY SIMON PHILIP (GB)
KINGSLEY JAMES WILLIAM (GB)
MORGANS CHRISTOPHER (GB)
BAGGALEY RICHARD (GB)
MARTIN STEVEN (GB)
WYATT ANDREW (GB)
KINGSLEY SIMON PHILIP (GB)
International Classes:
H01Q1/22; H01Q1/24; H01Q1/38; H01Q5/00; H01Q5/357; H01Q9/04; H01Q9/40; H01Q9/42; H01Q21/24; H01Q25/00; (IPC1-7): H01Q9/04; H01Q1/38; H01Q25/00
Domestic Patent References:
| WO2002071542A1 | 2002-09-12 |
Foreign References:
| EP0828310A2 | 1998-03-11 | |||
| US6549170B1 | 2003-04-15 | |||
| US5990838A | 1999-11-23 | |||
| EP0863571A2 | 1998-09-09 |
Other References:
WU TZUENN-YIH ET AL: "Printed diversity monopole antenna for WLAN operation", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 38, no. 25, 5 December 2002 (2002-12-05), pages 1625 - 1626, XP006019477, ISSN: 0013-5194
MORIOKA T ET AL: "REDUCTION OF COUPLING BETWEEN TWO WIRE ANTENNAS USING A SLOT", IEICE TRANSACTIONS ON COMMUNICATIONS, INSTITUTE OF ELECTRONICS INFORMATION AND COMM. ENG. TOKYO, JP, vol. 80-B, no. 5, 1 May 1997 (1997-05-01), pages 699 - 705, XP000723043, ISSN: 0916-8516
MORIOKA T ET AL: "REDUCTION OF COUPLING BETWEEN TWO WIRE ANTENNAS USING A SLOT", IEICE TRANSACTIONS ON COMMUNICATIONS, INSTITUTE OF ELECTRONICS INFORMATION AND COMM. ENG. TOKYO, JP, vol. 80-B, no. 5, 1 May 1997 (1997-05-01), pages 699 - 705, XP000723043, ISSN: 0916-8516
Attorney, Agent or Firm:
Harrison, Goddard Foote (Belgrave Street, Leeds LS2 8DD, GB)
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