EP 0600799 B1 19981014 - An active antenna with variable polarisation synthesis
Title (en)
An active antenna with variable polarisation synthesis
Title (de)
Aktive Antenne mit variabler Polarisations-Synthese
Title (fr)
Antenne active à synthèse de polarisation variable
Publication
Application
Priority
FR 9214661 A 19921204
Abstract (en)
[origin: EP0600799A1] The invention relates to a UHF transmission/reception (T/R) circuit for an array antenna with polarisation synthesis, especially for a radar antenna. According to the invention, the required polarisation is obtained by applying two signals to a radiating element of the antenna, on two orthogonal access channels, having a controllable phase shift between the two channels, and the two channels operating simultaneously. In a preferred embodiment, the two transmission channels are equipped with two power amplifiers which each amplify a signal originating from an in-phase power divider or from a hybrid coupler, with a phase shift controllable by one or two bits, which adds a phase shift of 0, 90 or 180@, allowing the synthesis of orthogonal, linear or circular polarisations. According to one preferred embodiment, the circuit according to the invention is produced wholly or partly in monolithic (MMIC) technology. The invention relates also to an antenna including a T/R circuit having the above characteristics. <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 21/24 (2006.01)
CPC (source: EP US)
H01Q 21/245 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0600799 A1 19940608; EP 0600799 B1 19981014; CA 2110634 A1 19940605; CA 2110634 C 20000215; DE 69321561 D1 19981119; DE 69321561 T2 19990401; ES 2125317 T3 19990301; FR 2699008 A1 19940610; FR 2699008 B1 19941230; US 5659322 A 19970819
DOCDB simple family (application)
EP 93402925 A 19931202; CA 2110634 A 19931203; DE 69321561 T 19931202; ES 93402925 T 19931202; FR 9214661 A 19921204; US 16127393 A 19931203