EP 0504151 A4 19921202 - SATELLITE SIGNALLING SYSTEM HAVING A SIGNAL BEAM WITH A VARIABLE BEAM AREA
Title (en)
SATELLITE SIGNALLING SYSTEM HAVING A SIGNAL BEAM WITH A VARIABLE BEAM AREA
Publication
Application
Priority
US 43226889 A 19891106
Abstract (en)
[origin: WO9107024A1] This invention relates to a satellite signalling system, such as a satellite paging system, having signal coverage over a very wide area. The satellite signalling system comprises a satellite (24) to which is coupled an antenna (22) for providing a signal beam having a variable beam area. The satellite can control the position of the antenna such that the signal beam can be directed in a predetermined sequence to a plurality of locations (28) on earth. The antenna (22) is arranged to vary the signal beam's area in dependence on the location to which the signal beam is directed. The signal beam comprises a data signal having a data rate which can be varied by the antenna in dependence on the beam area.
IPC 1-7
IPC 8 full level
H04B 7/185 (2006.01); H04B 7/204 (2006.01); H04W 84/02 (2009.01)
CPC (source: EP KR)
H04B 7/185 (2013.01 - KR); H04B 7/2041 (2013.01 - EP); H04W 84/022 (2013.01 - EP)
Citation (search report)
- [Y] US 4145573 A 19790320 - ARNOLD HAMILTON W
- [Y] WO 8702191 A1 19870409 - HUGHES AIRCRAFT CO [US]
- [A] US 4188578 A 19800212 - REUDINK DOUGLAS O [US], et al
- [A] DE 3706240 A1 19880908 - ANT NACHRICHTENTECH [DE]
- See references of WO 9107024A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
WO 9107024 A1 19910516; AU 6616890 A 19910531; CA 2067809 A1 19910507; EP 0504151 A1 19920923; EP 0504151 A4 19921202; JP H05501489 A 19930318; KR 920704453 A 19921219; KR 950012831 B1 19951021
DOCDB simple family (application)
US 9005853 W 19901015; AU 6616890 A 19901015; CA 2067809 A 19901015; EP 90915899 A 19901015; JP 51501890 A 19901015; KR 920701051 A 19920504