Global Patent Index - EP 0981840 A1

EP 0981840 A1 2000-03-01 - HIGH IMPEDANCE TYPE HIGH FREQUENCY ANTENNA

Title (en)

HIGH IMPEDANCE TYPE HIGH FREQUENCY ANTENNA

Title (de)

HOCHFREQUENZANTENNE MIT HOHER IMPEDANZ

Title (fr)

ANTENNE HAUTE FREQUENCE DE TYPE A IMPEDANCE ELEVEE

Publication

EP 0981840 A1 (EN)

Application

EP 97925312 A

Priority

  • KR 9700096 W
  • KR 19970014726 A

Abstract (en)

[origin: WO9848478A1] A high impedance type high frequency antenna by which the antenna is not influenced by an external factor when a human body or the like approaches the antenna by enabling a high impedance by decreasing a reactance component and increasing a resistance component, whereby it is possible to fabricate a compact size product. The antenna inludes an RF module having an input and output capacity of 50 OMEGA , and a matching circuit connected between the antenna and the RF module for outputting 50 OMEGA of an impedance and having a smith chart at a 1/4 lambda helical portion so that a 1/2 lambda monopole antenna is matched with a 50 OMEGA RF module.

IPC 1-7 (main, further and additional classification)

H01Q 9/30; H04B 1/18

IPC 8 full level (invention and additional information)

H01Q 1/24 (2006.01); H01Q 9/30 (2006.01); H04B 1/18 (2006.01)

CPC (invention and additional information)

H01Q 9/30 (2013.01); H01Q 1/242 (2013.01); H04B 1/18 (2013.01)

Citation (search report)

See references of WO 9848478A1

Designated contracting state (EPC)

DE ES FR GB IT NL SE

EPO simple patent family

WO 9848478 A1 19981029; AU 3049197 A 19981113; BR 9715003 A 20010918; CN 1249071 A 20000329; EP 0981840 A1 20000301; IL 131065 D0 20010128; JP 2000512118 A 20000912

INPADOC legal status


2000-08-16 [18W] WITHDRAWN

- Date of withdrawal: 20000518

2000-03-01 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990826

2000-03-01 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IT NL SE