EP 0952624 A1 19991027 - Electronic multibeam sweep antenna
Title (en)
Electronic multibeam sweep antenna
Title (de)
Elektronische Mehrfachrichtstrahlantenne mit Abtastung
Title (fr)
Antenne à balayage électronique à multifaisceaux
Publication
Application
Priority
FR 9805182 A 19980424
Abstract (en)
The system uses addition of components of successive orders to determine dephasing required for operation. The aerial comprises an array of dephasers (2, Dij), with N simultaneous beams being obtained in N directions by an excitation law (fij) applied to each dephaser (Dij). The excitation law is calculated by summing the phase laws ( phi 1, phi 2 ... phi N) associated with each direction of order 1,2,... N, and by applying the resulting phase shift ( SIMILAR ftij) to the dephaser, without applying the resultant amplitude modulation ( SIMILAR pij). The frequencies of the beams used are different. The phase laws ( SIMILAR f1, SIMILAR f2 ... SIMILAR fN) may each be affected by a weighting coefficient (r1, r2 ...rN). The weighting coefficients are determined to obtain a sum channel and a difference channel in two different directions.
Abstract (fr)
L'invention concerne une antenne à balayage électronique à multifaisceaux. L'antenne comportant un réseau de déphaseurs (2, Dij) , les N faisceaux simultanés sont obtenus dans N directions par une loi d'excitation (fij) appliquée à chaque déphaseur (Dij) qui est calculée en sommant les lois de phases ψ1, ψ2,... ψk,... ψN associées respectivement à chaque direction d'ordre 1, 2,...k, ...N et en appliquant le déphasage résultant (ψtij) sur le déphaseur, sans appliquer la modulation d'amplitude résultante (ρij). Application : notamment antennes à commande de phase uniquement dans le cadre de communications par satellites ou terrestres nécessitant une communication simultanée avec plusieurs sites variables. <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 19/00 (2006.01); H01Q 3/26 (2006.01); H01Q 3/46 (2006.01); H01Q 25/04 (2006.01)
CPC (source: EP US)
H01Q 3/46 (2013.01 - EP US)
Citation (search report)
- [A] US 5706012 A 19980106 - KAY JOHN H [US]
- [YA] GUO Y J ET AL: "PHASE EFFICIENCY OF THE REFLECTIVE ARRAY ANTENNA", IEE PROCEEDINGS: MICROWAVES, ANTENNAS AND PROPAGATION, vol. 142, no. 2, 1 April 1995 (1995-04-01), pages 115 - 120, XP000523503
- [Y] E. HECHT: "Optics", 1987, ADDISON-WESLEY, USA, XP002090007
- [Y] SHIBAN K. KOUL: "Microwave and millimeter wave phase shifters volume 1", 1991, ARTECH HOUSE, USA, XP002090015
- [A] BERNARD GROB: "grob basic electronics", 1992, MC GRAW HILL, USA, XP002090009
- [A] JAVOR R D ET AL: "BEAM STEERING OF A MICROSTRIP FLAT REFLECTARRAY ANTENNA", DIGEST OF THE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, SEATTLE, WA., JUNE 19 - 24, 1994, vol. 2, 19 June 1994 (1994-06-19), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 956 - 959, XP000545575
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI NL SE
DOCDB simple family (publication)
EP 0952624 A1 19991027; FR 2778026 A1 19991029; FR 2778026 B1 20070126; JP 2000031737 A 20000128; US 6198433 B1 20010306
DOCDB simple family (application)
EP 99400963 A 19990420; FR 9805182 A 19980424; JP 15421499 A 19990423; US 29674099 A 19990423