EP 0649181 B1 20030423 - Antenna for portable radio apparatus, method for manufacturing the same and portable radio apparatus comprising the same
Title (en)
Antenna for portable radio apparatus, method for manufacturing the same and portable radio apparatus comprising the same
Title (de)
Antenne für tragbares Funkgerät, Verfahren zur Herstellung einer derartigen Antenne und tragbares Funkgerät mit einer derartigen Antenne
Title (fr)
Antenne du type pour dispositif radio portable, procédé de fabrication d'une telle antenne et dispositif radio portable comportant une telle antenne
Publication
Application
Priority
FR 9312226 A 19931014
Abstract (en)
[origin: EP0649181A1] The present invention relates to an antenna (1) of the type for a portable radio device, particularly comprising a helical antenna (2) coupled by its base to a transmitter/receiver, characterised in that the pitch of the helix (8) made of a conducting material constituting the helical antenna (2) is variable according to the height of the helix, and decreasing from the base (8B) of the helical antenna up to its peak (8A). <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 1/24 (2006.01); H01Q 1/36 (2006.01); H01Q 1/40 (2006.01); H01Q 9/36 (2006.01); H01Q 11/08 (2006.01)
CPC (source: EP US)
H01Q 1/242 (2013.01 - EP US); H01Q 1/244 (2013.01 - EP US); H01Q 1/362 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0649181 A1 19950419; EP 0649181 B1 20030423; AT E238614 T1 20030515; AU 683907 B2 19971127; AU 7291794 A 19950504; CA 2118082 A1 19950415; DE 69432548 D1 20030528; DE 69432548 T2 20040304; FI 944798 A0 19941012; FI 944798 A 19950415; FR 2711277 A1 19950421; FR 2711277 B1 19951110; JP H07176929 A 19950714; NZ 264417 A 19961028; US 5668559 A 19970916
DOCDB simple family (application)
EP 94402293 A 19941012; AT 94402293 T 19941012; AU 7291794 A 19940912; CA 2118082 A 19941013; DE 69432548 T 19941012; FI 944798 A 19941012; FR 9312226 A 19931014; JP 24958494 A 19941014; NZ 26441794 A 19940908; US 32279994 A 19941013