EP 0227910 A3 19871202 - BEAM FORMING NETWORK FOR A BUTLER MATRIX FED CIRCULAR ARRAY
Title (en)
BEAM FORMING NETWORK FOR A BUTLER MATRIX FED CIRCULAR ARRAY
Publication
Application
Priority
US 80291785 A 19851129
Abstract (en)
[origin: EP0227910A2] A beam forming network is described for generating a difference beam in a first direction with an omnidirectional sidelobe in other directions incorporating a plurality of hybrid circuits and a plurality of directional couplers coupled together. The invention overcomes the problem of requiring a more complex circuit for generating a difference beam with an omnidirectional sidelobe.
IPC 1-7
IPC 8 full level
G01S 13/74 (2006.01); H01P 5/18 (2006.01); H01Q 3/24 (2006.01); H01Q 3/40 (2006.01); H01Q 21/20 (2006.01); H01Q 21/22 (2006.01); H01Q 21/29 (2006.01); H01Q 25/02 (2006.01)
CPC (source: EP)
H01P 5/222 (2013.01); H01Q 3/40 (2013.01); H01Q 25/02 (2013.01)
Citation (search report)
- [A] US 4196436 A 19800401 - WESTERMAN CHARLES W [US]
- [A] US 3713167 A 19730123 - DAVID S
- [A] US 4101892 A 19780718 - ALFORD ANDREW
- [A] PROCEEDINGS OF THE IEEE 1979 NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE, NAECON 1979, Dayton, 15th-17th May 1979, vol. 1, pages 44-49, IEEE; J.A. ACORACI: "Small lightweight electronically steerable cylindrical antenna successfully utilized in an air traffic management system"
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0227910 A2 19870708; EP 0227910 A3 19871202; IL 80457 A0 19870130; JP S62132403 A 19870615
DOCDB simple family (application)
EP 86115004 A 19861029; IL 8045786 A 19861030; JP 27989386 A 19861126