EP 0337825 B1 19931118 - Microstrip fashion microwave rejection filter.
Title (en)
Microstrip fashion microwave rejection filter.
Title (de)
Mikrowellensperrfilter in Mikrostreifenausführung.
Title (fr)
Filtre coupe-bande hyperfréquence en technologie micro-bande.
Publication
Application
Priority
FR 8803187 A 19880311
Abstract (en)
[origin: EP0337825A1] This microband technology microwave band-rejection filter is of the type with coupled lines, that is to say containing a transmission line in the form of a microstrip (1) associated with at least one filtering cell comprising a microstrip segment (4) arranged parallel to the transmission line and remote from it, this microstrip segment having one of its ends open-circuited and the other connected to the earth potential. Connection to the earth potential is effected for each cell with interposition of a tunable LC resonant circuit (5, 6). Advantageously, the capacitive element of the tunable LC resonant circuit comprises a varactor (6) whose anode is brought to an adjustable DC potential (-V), so that control of this DC potential allows variation in the central rejection frequency of the band-rejection filter, and the inductive element of the tunable LC resonant circuit is produced in the form of a wire (5) connecting the microstrip segment (4) to the varactor (6), the latter being arranged on the same dielectric substrate (7) as this microstrip segment. <IMAGE>
IPC 1-7
IPC 8 full level
H01P 1/203 (2006.01)
CPC (source: EP)
H01P 1/203 (2013.01)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
EP 0337825 A1 19891018; EP 0337825 B1 19931118; DE 68910719 D1 19931223; DE 68910719 T2 19940317; FR 2628571 A1 19890915; FR 2628571 B1 19901109
DOCDB simple family (application)
EP 89400632 A 19890307; DE 68910719 T 19890307; FR 8803187 A 19880311