EP 1471601 A1 20041027 - Antenna device
Title (en)
Antenna device
Title (de)
Antennenvorrichtung
Title (fr)
Dispositif d'antenne
Publication
Application
Priority
JP 2003117044 A 20030422
Abstract (en)
The antenna is formed on a dielectric block (18) in an inverted-F configuration and is tuned by a variable capacitive element (16), e.g. a varactor diode. The varactor is connected to a radiating electrode (19) so that the varying capacitance value changes the resonant frequency of the antenna based on a received frequency using a DC bias voltage as a control signal.
IPC 1-7
IPC 8 full level
H01Q 13/08 (2006.01); H01Q 1/24 (2006.01); H01Q 1/38 (2006.01); H01Q 5/10 (2015.01); H01Q 7/00 (2006.01); H01Q 9/04 (2006.01); H01Q 9/14 (2006.01)
CPC (source: EP KR)
A44B 18/0011 (2013.01 - KR); H01Q 1/241 (2013.01 - EP); H01Q 1/38 (2013.01 - EP); H01Q 7/005 (2013.01 - EP); H01Q 9/0421 (2013.01 - EP); H01Q 9/0442 (2013.01 - EP)
Citation (search report)
- [X] US 2002149526 A1 20021017 - TRAN ALLEN [US], et al
- [X] US 6362789 B1 20020326 - TRUMBULL THOMAS [US], et al
- [X] US 4805232 A 19890214 - MA JOHN Y [US]
- [X] US 4518965 A 19850521 - HIDAKA KAZUTAKA [JP]
- [Y] US 5757326 A 19980526 - KOYAMA SHUNSUKE [JP], et al
- [Y] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 04 31 August 2000 (2000-08-31)
- [Y] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1471601 A1 20041027; JP 2004328128 A 20041118; KR 20040093407 A 20041105
DOCDB simple family (application)
EP 04008892 A 20040414; JP 2003117044 A 20030422; KR 20040027500 A 20040421