EP 1562259 A1 20050810 - Radio communication apparatus
Title (en)
Radio communication apparatus
Title (de)
Funkkommunikationsvorrichtung
Title (fr)
Appareil de radiocommunication
Publication
Application
Priority
JP 2004030470 A 20040206
Abstract (en)
A radio communication apparatus has an RF current controller (5; 51; 52; 53), typically a one-fourth wavelength long conductor (5), controlling an RF current flowing over the ground plane to improve the antenna efficiency. The RF current controller (5; 51; 52; 53) is located no farther than one-fourth wavelength of a the lowest frequency in the frequency band where the apparatus is used, away from a feeding point (8) at which an antenna element (7) is fed. The RF current controller (5; 51; 52; 53) and the feeding point (8) are located within a pier-shaped portion (3) which is separated from an adjacent portion (4) by a gap (2) of the ground pattern, so that the RF current flowing over the ground plane decreases and the antenna efficiency is improved (refer to Figure 1B). <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 1/38 (2006.01); H01Q 1/48 (2006.01); H01Q 5/10 (2015.01); H01Q 9/18 (2006.01); H01Q 9/38 (2006.01); H04B 1/38 (2006.01)
CPC (source: EP)
H01Q 1/242 (2013.01); H01Q 1/38 (2013.01); H01Q 1/48 (2013.01)
Citation (search report)
- [Y] EP 1271688 A1 20030102 - TOSHIBA KK [JP]
- [A] DE 10110982 A1 20020919 - SIEMENS AG [DE]
- [A] US 2002037739 A1 20020328 - BOYLE KEVIN R [GB], et al
- [A] US 2003050094 A1 20030313 - BOYLE KEVIN R [GB], et al
- [DY] PATENT ABSTRACTS OF JAPAN vol. 2002, no. 02 2 April 2002 (2002-04-02)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1562259 A1 20050810; EP 1562259 B1 20090128; DE 602004019273 D1 20090319; JP 2005223686 A 20050818; JP 3810075 B2 20060816
DOCDB simple family (application)
EP 04025762 A 20041029; DE 602004019273 T 20041029; JP 2004030470 A 20040206