EP 1266425 A1 20021218 - MULTIFREQUENCY ANTENNA FOR INSTRUMENT WITH SMALL VOLUME
Title (en)
MULTIFREQUENCY ANTENNA FOR INSTRUMENT WITH SMALL VOLUME
Title (de)
ANTENNE FÜR MEHRERE FREQUENZEN FÜR KLEINE INSTRUMENTE
Title (fr)
ANTENNE MULTIFREQUENCE POUR INSTRUMENT DE PETIT VOLUME
Publication
Application
Priority
- EP 01905562 A 20010223
- CH 0100119 W 20010223
- EP 00200934 A 20000315
Abstract (en)
[origin: WO0169716A1] The invention concerns an antenna (1) consisting of a first strip (3) whereof the length (L1) is tuned at a high frequency (fh) and a second strip (4), extending the first of length (L2). The sum of lengths L1 and L2 results into an antenna whereof the length L3 is tuned at a low frequency (fb). A resonant circuit (5) comprising an inductance (6), connected in parallel on a capacitor (7) is located between the first and second strips (3, 4). The values of said components are selected so as to cause the resonant circuit to resonate on the high frequency (fh). When the high frequency is active, the length of the antenna is reduced to that (L1) of the first strip. When the low frequency is active, the length of the antenna extends to the sum (L3) of the lengths provided by the first and second strips. The inductance (6) is a narrow strip substantially rectilinear formed integrally with at least (3) one of said strips linked to said strip (8) by one of its ends.
IPC 1-7
IPC 8 full level
H01Q 5/10 (2015.01); G04G 21/04 (2013.01); G04G 99/00 (2010.01); H01Q 1/27 (2006.01); H01Q 5/15 (2015.01); H01Q 9/40 (2006.01)
CPC (source: EP US)
G04G 21/04 (2013.01 - EP US); G04R 60/00 (2013.01 - EP US); H01Q 1/273 (2013.01 - EP US); H01Q 5/321 (2015.01 - EP US)
Citation (search report)
See references of WO 0169716A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0169716 A1 20010920; CN 1225057 C 20051026; CN 1418389 A 20030514; DE 60101378 D1 20040115; DE 60101378 T2 20041014; EP 1266425 A1 20021218; EP 1266425 B1 20031203; JP 2003527015 A 20030909; US 2003030589 A1 20030213; US 6642895 B2 20031104
DOCDB simple family (application)
CH 0100119 W 20010223; CN 01806553 A 20010223; DE 60101378 T 20010223; EP 01905562 A 20010223; JP 2001567075 A 20010223; US 22104402 A 20020909