EP 0255068 B1 19930113 - FILTER FOR SHORT ELECTROMAGNETIC WAVES HAVING THE SHAPE OF COMB FILTERS OR INTERDIGITAL FILTERS
Title (en)
FILTER FOR SHORT ELECTROMAGNETIC WAVES HAVING THE SHAPE OF COMB FILTERS OR INTERDIGITAL FILTERS
Publication
Application
Priority
DE 3625559 A 19860729
Abstract (en)
[origin: US4757285A] Microwave filters which have the best electrical characteristics for small volumes are required in radio communications particularly in traffic broadcast communication links and the invention provides filters formed as comb line or interdigital line filters in which the inner resonator conductors are formed as flat spirals.
IPC 1-7
IPC 8 full level
H01P 1/203 (2006.01); H01P 1/205 (2006.01); H01P 5/08 (2006.01); H01P 7/00 (2006.01)
CPC (source: EP US)
H01P 1/205 (2013.01 - EP US); H01P 7/005 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0255068 A1 19880203; EP 0255068 B1 19930113; AT E84639 T1 19930115; DE 3783530 D1 19930225; JP H056921 B2 19930127; JP S6338305 A 19880218; US 4757285 A 19880712
DOCDB simple family (application)
EP 87110779 A 19870724; AT 87110779 T 19870724; DE 3783530 T 19870724; JP 18679687 A 19870728; US 6916987 A 19870702