EP 0013240 B1 19821020 - COMMON ANTENNA FOR PRIMARY AND SECONDARY RADAR
Title (en)
COMMON ANTENNA FOR PRIMARY AND SECONDARY RADAR
Publication
Application
Priority
FR 7836484 A 19781227
Abstract (en)
[origin: US4284991A] A bifunctional antenna of a primary/secondary radar system comprises a reflector having a concave front surface formed with a row of slots along a horizontal generatrix, the slots lying in front of respective cavities excitable to radiate interrogation signals in a directive sum pattern and supplemental radiation in a differential control pattern designed to blank minor lobes of the interrogation pattern. Some of the cavities and slots are symmetrically duplicated on a dielectric cap covering the convex rear surface of the reflector. The reflector and its cap form a closed shell of dielectric material, specifically a glass mat impregnated with epoxy resin, overlain at the front by a fiber-glass fabric incorporating orthogonally intersecting insulated copper wires. The fabric also lines the inner walls of each cavity which is filled with dielectric material; its radiating slot is spanned only by horizontal wires paralleling the plane of polarization of target-seeking radiation from a source illuminating the reflector.
IPC 1-7
IPC 8 full level
G01S 7/02 (2006.01); G01S 13/87 (2006.01); H01Q 13/10 (2006.01); H01Q 13/18 (2006.01); H01Q 15/14 (2006.01); H01Q 19/17 (2006.01); H01Q 21/22 (2006.01); H01Q 21/28 (2006.01); H01Q 25/00 (2006.01)
CPC (source: EP US)
H01Q 21/28 (2013.01 - EP US); H01Q 25/00 (2013.01 - EP US); H01Q 25/001 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT LU NL SE
DOCDB simple family (publication)
EP 0013240 A1 19800709; EP 0013240 B1 19821020; AT E1686 T1 19821115; DE 2963910 D1 19821125; DK 549779 A 19800628; FR 2445629 A1 19800725; FR 2445629 B1 19820618; JP S5590876 A 19800709; JP S6034070 B2 19850806; NO 794240 L 19800630; US 4284991 A 19810818
DOCDB simple family (application)
EP 79401063 A 19791221; AT 79401063 T 19791221; DE 2963910 T 19791221; DK 549779 A 19791221; FR 7836484 A 19781227; JP 17018279 A 19791226; NO 794240 A 19791221; US 10573379 A 19791220