Global Patent Index - EP 1266425 A1

EP 1266425 A1 2002-12-18 - 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

EP 1266425 A1 (FR)

Application

EP 01905562 A

Priority

  • EP 01905562 A
  • CH 0100119 W
  • EP 00200934 A

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 (main, further and additional classification)

H01Q 1/27; G04G 1/00; H01Q 5/02

IPC 8 full level (invention and additional information)

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 (invention and additional information)

G04G 21/04 (2013.01); G04R 60/00 (2013.01); H01Q 1/273 (2013.01); H01Q 5/321 (2013.01)

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

EPO simple patent family

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

INPADOC legal status


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- Inventor name: ZUERCHER, JEAN-FRANCOIS

2003-01-22 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: SKRIVERVIK, ANJA

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