EP 0012645 B1 19830622 - SHEET ANTENNA COMPOSED OF TWO CIRCULAR RINGS
Title (en)
SHEET ANTENNA COMPOSED OF TWO CIRCULAR RINGS
Publication
Application
Priority
FR 7834424 A 19781127
Abstract (en)
[origin: US4443805A] The plate-type antenna is constituted by two tangent circular rings lying in a common plane and interconnected by a slit which is narrow and oriented in the direction of an axis which joins the centers of the rings. The slit extends from the internal edge or circumference of one ring to the internal edge or circumference of the other ring. The tangency zone has a given width which is small as possible in the direction which is perpendicular to the axis of the two rings. One edge of the slit is excited or energized in the immediate neighborhood of the center of symmetry of the antenna. Ground is connected to the middle point of at least one ring located on the axis on the other side of the center. The antennas may be assembled into networks. They may be constructed as double-faced printed circuits.
IPC 1-7
IPC 8 full level
H01Q 1/38 (2006.01); H01Q 9/26 (2006.01); H01Q 9/28 (2006.01); H01Q 13/10 (2006.01)
CPC (source: EP US)
H01Q 1/38 (2013.01 - EP US); H01Q 9/26 (2013.01 - EP US); H01Q 9/28 (2013.01 - EP US); H01Q 13/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT NL SE
DOCDB simple family (publication)
EP 0012645 A1 19800625; EP 0012645 B1 19830622; AT E3923 T1 19830715; DE 2965766 D1 19830728; FR 2442520 A1 19800620; FR 2442520 B1 19830225; US 4443805 A 19840417
DOCDB simple family (application)
EP 79400907 A 19791123; AT 79400907 T 19791123; DE 2965766 T 19791123; FR 7834424 A 19781127; US 32931881 A 19811210