EP 0828306 A3 20000322 - A matched impedance filter
Title (en)
A matched impedance filter
Title (de)
Filter mit angepassten Impedanzen
Title (fr)
Filtre à impedance adapté
Publication
Application
Priority
- FI 963446 A 19960903
- FI 963445 A 19960903
Abstract (en)
[origin: EP0828306A2] In a radiofrequency filter (34; 35; 36) there is a port (34a; 34b; 34c) by means of which it is connected to an external component (14; 17; 21) and the impedance of which is adjusted by internal filter circuits so as to correspond to the impedance of the external component (Zant, ZRX, ZTX) at the operating frequency. The filter may for example be a duplex filter (34), in which case the internal impedance matching may be employed at the antenna port (34a), at the reception port (34b) and/or at the transmission port (34c). <IMAGE>
IPC 1-7
IPC 8 full level
H01P 1/213 (2006.01)
CPC (source: EP)
H01P 1/2136 (2013.01)
Citation (search report)
- [X] US 5432489 A 19950711 - YRJOELAE SEPPO [FI]
- [XY] EP 0336255 A1 19891011 - MOTOROLA INC [US]
- [Y] US 5355524 A 19941011 - HIGGINS JR ROBERT J [US]
- [X] EP 0706230 A1 19960410 - LK PRODUCTS OY [FI]
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 97306729 A 19970902