EP 0043689 A3 19820120 - BEAM WAVEGUIDE FEED FOR ANTENNA
Title (en)
BEAM WAVEGUIDE FEED FOR ANTENNA
Publication
Application
Priority
GB 8022088 A 19800704
Abstract (en)
[origin: EP0043689A2] In microwave communication systems it is common practice to use a beam waveguide to transmit energy between a waveguide (2) connected to transmitting and receiving equipment located at ground level and a main antenna reflector mounted above ground level. Hitherto the waveguide (2) has terminated in a very large, accurately machined, horn which is necessary to produce a beam having a small angle of divergence suitable for entry into the beam waveguide (6). The present invention proposes that this large (and very expensive) horn be replaced by a relatively small horn (18) which produces a beam having a relatively wide angle of divergence. By using a concave reflector (22) and a sub-reflector (21) in Cassegrain configuration this widely diverging beam is converted into a more nearly parallel (or a totally parallel) beam which enters the beam waveguide (6) as illustrated.
IPC 1-7
IPC 8 full level
H01P 3/20 (2006.01); H01Q 19/13 (2006.01); H01Q 19/18 (2006.01); H01Q 19/19 (2006.01)
CPC (source: EP)
H01Q 19/191 (2013.01)
Citation (search report)
- [X] US 3521288 A 19700721 - SCHELL ALLAN C
- FR 1245072 A 19601104
- IEEE International Antennas and Propagation Symposium, Dec. 1969, Austin, Mac Graw-Hill, New York, (US) Y TAKEICHI et al.: "The Dual-Reflector Launcher for the Beam Waveguide", pages 70-77
- IEEE International Antennas and Propagation Symposium, Sept. 1970, Columbus, Mac Graw-Hill, New York, (US) T. KITSUREGAWA et al.: "The Four Reflector Launcher for the Beam Waveguide", pages 94-99
- PATENT ABSTRACTS OF JAPAN, Vol. 1, No. 127, page 5601E77, & JP-A-52 061 458 (20-05-1977)
- L'ONDE ELECTRIQUE, Vol. 51, Nr. 6, June 1971, Masson Paris, (FR) S. DRABOWITCH et al.: "Conception Radioelectrique d'une Antenne Experimentale de Telecommunication Spatiale dans la Gamme 10-35 GHz", pages 502-508
Designated contracting state (EPC)
CH DE FR IT NL SE
DOCDB simple family (publication)
EP 0043689 A2 19820113; EP 0043689 A3 19820120; GB 2079538 A 19820120; JP S5748805 A 19820320
DOCDB simple family (application)
EP 81302955 A 19810629; GB 8022088 A 19800704; JP 10434381 A 19810703