EP 0201409 B1 19900905 - BROAD-BAND DIRECTIONAL COUPLER FOR A MICROSTRIP LINE
Title (en)
BROAD-BAND DIRECTIONAL COUPLER FOR A MICROSTRIP LINE
Publication
Application
Priority
FR 8506422 A 19850426
Abstract (en)
[origin: ES8704293A1] A wide band directional coupler for microstrip lines has a microstrip line section whose conductive core is coupled to the core of the main line over a length lambda /4 ( lambda being the wave length in a mid portion of the desired pass band). The section has a first fraction parallel to the main line and at a small distance therefrom so as to provide tight coupling and a second fraction diverging from the main line and closed on a matching impedance. The free end of the first fraction is connected to the load and has an extension projecting over a length less than lambda /16 for forming a microcapacitor tapping energy from the main line.
IPC 1-7
IPC 8 full level
H01P 5/18 (2006.01)
CPC (source: EP US)
H01P 5/185 (2013.01 - EP US)
Citation (examination)
J.DARRICAU:"Physique et théorie du radar",1ére édition,tome 1,chapitre 2,pages 64-68,SODIPE,Paris (FR)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0201409 A1 19861217; EP 0201409 B1 19900905; AT E56313 T1 19900915; DE 3673863 D1 19901011; ES 554303 A0 19870401; ES 8704293 A1 19870401; FR 2581256 A1 19861031; FR 2581256 B1 19880408; US 4677399 A 19870630
DOCDB simple family (application)
EP 86400924 A 19860425; AT 86400924 T 19860425; DE 3673863 T 19860425; ES 554303 A 19860424; FR 8506422 A 19850426; US 85561986 A 19860425