EP 0427654 B1 19950208 - Tuned helical antennae consisting of two quadrifilar antennas fit into each other.
Title (en)
Tuned helical antennae consisting of two quadrifilar antennas fit into each other.
Title (de)
Wendelförmige Resonanzantenne, bestehend aus je vier Wendelleitern übereinander.
Title (fr)
Antenne en hélice, quadrifilaire, résonnante bicouche.
Publication
Application
Priority
FR 8914952 A 19891110
Abstract (en)
[origin: EP0427654A1] The present device relates to a novel antenna structure offering a near hemispherical radiating pattern and capable of offering a relatively wide pass band so as to be able to clear therein two neighbouring sub-bands or else a single, wide transmission band. <??>The antenna is of the type comprising a quadrifilar helix (11) consisting of two bifilar helices arranged orthogonally and excited in phase quadrature, and includes at least one second quadrifilar helix (12) coaxial and electromagnetically coupled with the said first quadrifilar helix (11). <??>Preferred application to L-band communications between geostationary satellites or in transit with mobiles equipped with such antennas. <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 5/00 (2006.01); H01Q 11/08 (2006.01)
CPC (source: EP US)
H01Q 11/08 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 0427654 A1 19910515; EP 0427654 B1 19950208; CA 2029290 A1 19910511; DE 69016746 D1 19950323; DE 69016746 T2 19950914; FR 2654554 A1 19910517; FR 2654554 B1 19920731; JP H03274808 A 19911205; US 5255005 A 19931019
DOCDB simple family (application)
EP 90460041 A 19901107; CA 2029290 A 19901105; DE 69016746 T 19901107; FR 8914952 A 19891110; JP 30418090 A 19901113; US 60938390 A 19901105