EP 0538485 A4 19940119 -
Publication
Application
Priority
- JP 9200581 W 19920506
- JP 10424591 A 19910509
- JP 25377391 A 19911001
Abstract (en)
[origin: WO9220117A1] An antenna which can provide a radio device stable and highly sensitive irrespective of its attitude or its carried direction and of the effect of the proximity to a human body when it is carried with the human body. When the radio device having this antenna is not carried with a human body, regardless of the plane of polarization of an electromagnetic wave, i.e., even in a place where the plane of polarization under multipath distorsion and fading is always changed, the radio device has a stable sensitivity characteristic. Also, the antenna circuit achieving these characteristics requires no additional element for matching, and has a remarkable effect on reducing the size of a radio device.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H01Q 1/273 (2013.01); H01Q 7/00 (2013.01)
Citation (search report)
- [YA] EP 0122485 A1 19841024 - NEC CORP [JP]
- [YA] EP 0372430 A2 19900613 - ATE CORP [US]
- [A] US 4862181 A 19890829 - PONCE DE LEON LORENZO A [US], et al
- See references of WO 9220117A1
Designated contracting state (EPC)
DE FR GB NL SE
DOCDB simple family (publication)
WO 9220117 A1 19921112; DE 69216983 D1 19970306; EP 0538485 A1 19930428; EP 0538485 A4 19940119; EP 0538485 B1 19970122; HK 1000299 A1 19980220
DOCDB simple family (application)
JP 9200581 W 19920506; DE 69216983 T 19920506; EP 92909642 A 19920506; HK 97101837 A 19970925