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1. WO2007040639 - MULTI-BAND PIFA

Publication Number WO/2007/040639
Publication Date 12.04.2007
International Application No. PCT/US2006/017732
International Filing Date 08.05.2006
Chapter 2 Demand Filed 01.05.2007
IPC
H01Q 9/04 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
9Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
04Resonant antennas
H01Q 5/00 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
5Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
CPC
H01Q 5/00
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
5Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
H01Q 5/371
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
5Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
30Arrangements for providing operation on different wavebands
307Individual or coupled radiating elements, each element being fed in an unspecified way
342for different propagation modes
357using a single feed point
364Creating multiple current paths
371Branching current paths
H01Q 9/0442
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
9Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
04Resonant antennas
0407Substantially flat resonant element parallel to ground plane, e.g. patch antenna
0442with particular tuning means
H01Q 9/045
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
9Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
04Resonant antennas
0407Substantially flat resonant element parallel to ground plane, e.g. patch antenna
045with particular feeding means
Applicants
  • SONY ERICSSON MOBILE COMMUNICATIONS AB [SE]/[SE] (AllExceptUS)
  • OZKAR, Mete [TR]/[US] (UsOnly)
Inventors
  • OZKAR, Mete
Common Representative
  • SONY ERICSSON MOBILE COMMUNICATIONS AB
Priority Data
11/238,43029.09.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MULTI-BAND PIFA
(FR) ANTENNE PLANE À F INVERSÉ MULTIBANDES
Abstract
(EN)
The method and apparatus described herein improves the impedance matching of a multi-band antenna (100). In particular, the multi-band antenna (100) comprises a radiating element (110) vertically displaced from an antenna ground plane (132) by feed and ground elements (116, 118), and a parasitic element (120) interposed between the feed and ground elements (116, 118). When the multi-band antenna (100) operates in the first frequency band, a selection circuit (140) connects the parasitic element (120) to the ground plane (132) to capacitively couple the ground element (118) to the feed element (116). However, when the multi-band antenna (100) operates in the second frequency band, the selection circuit (140) disables the capacitive coupling. By applying the capacitive coupling only when the multi-band antenna (100) operates in the first frequency band, the present invention improves the performance of the antenna (100) in the first frequency band without adversely affecting the performance of the antenna (100) in the second frequency band.
(FR)
La présente invention concerne un procédé et un appareil destinés à améliorer la concordance d’impédance d’une antenne multibandes (100). En particulier, l’antenne multibandes (100) comprend un élément de radiation (110) déplacé verticalement à partir d’un plan de sol d’antenne (132) par des éléments de sol et d’alimentation (116, 118), et un élément parasite (120) intercalé entre les éléments de sol et d’alimentation (116, 118). Quand l’antenne multibandes (100) fonctionne dans la première bande de fréquence, un circuit de sélection (140) connecte l’élément parasite (120) à un plan de sol (132) afin de coupler de façon capacitive l’élément de sol (118) à l’élément d’alimentation (116). Toutefois, quand l’antenne multibandes (100) fonctionne dans la seconde bande de fréquence, le circuit de sélection (140) désactive le couplage de façon capacitive. En appliquant le couplage de façon capacitive seulement lorsque l’antenne multibandes (100) fonctionne dans la première bande de fréquence, la présente invention améliore la performance de l’antenne (100) dans la première bande de fréquence, sans compromettre la performance de l’antenne (100) dans la seconde bande de fréquence.
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