EP 2019448 A1 20090128 - Antenna device
Title (en)
Antenna device
Title (de)
Antennenvorrichtung
Title (fr)
Dispositif d'antenne
Publication
Application
Priority
EP 07445027 A 20070629
Abstract (en)
The present invention relates to an antenna device for a communication device operable in at least two frequency intervals and comprising a generally planar electrically conductive driven radiating element (2) having a feeding portion (5) connectable to a feeding point (P) of a printed wire board (4) of the communication device and a generally planar elongated parasitic element (3) having a ground portion (6) connectable to a grounding point (G) of the printed wire board. The driven radiating element (2) and the parasitic element (3) are essentially coplanar and separated by a gap, wherein the grounding portion (6) of the parasitic element (3) is positioned at a grounding point (G') along the parasitic element (3) so as to virtually divide the parasitic element (3) into a first and a second portion respectively with a first length (L1) and a second length (L2), wherein the first portion having a first length (L1) is longer than the second portion having a second length (L2). By designing the parasitic element in this fashion, it is possible to easily modify and influence the impedance match of the resonance for the different frequencies, i.e. the Return Loss level for which the parasitic element is active.
IPC 8 full level
H01Q 9/04 (2006.01); H01Q 19/00 (2006.01)
CPC (source: EP)
H01Q 5/371 (2015.01); H01Q 5/378 (2015.01); H01Q 9/0421 (2013.01); H01Q 19/005 (2013.01)
Citation (search report)
- [X] DE 102004035548 A1 20060216 - SIEMENS AG [DE]
- [X] DE 102005042341 A1 20070308 - SIEMENS AG [DE]
- [DA] US 6456250 B1 20020924 - YING ZHINONG [SE], et al
- [T] US 2007182658 A1 20070809 - OZDEN SINASI [DK]
- [A] KATHLEEN L VIRGA ET AL: "Low-Profile Enhanced-Bandwidth PIFA Antennas for Wireless Communications Packaging", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 45, no. 10, October 1997 (1997-10-01), XP011036995, ISSN: 0018-9480
Designated contracting state (EPC)
DK FI FR GB
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 07445027 A 20070629