EP 0570863 A3 19940413 -
Publication
Application
Priority
DE 4217091 A 19920522
Abstract (en)
[origin: EP0570863A2] In order to hold a multiplicity of waveguide radiators (1) which are arranged in rows and columns and are preferably provided with a funnel-shaped opening, of the antenna which rotates about a vertical axis, a supporting plate (2) is provided with radiator (retaining) openings (3). In each case one polarisation changeover device (6), having a 0 DEG /90 DEG phase shifter (7), is arranged on the rear side of the radiators, which are provided with two injection devices (4, 5) which are spatially offset through 90 DEG , so that it is possible to switch over between linear polarisation and circular polarisation. One vertical distributor (10) is in each case arranged behind the polarisation changeover devices (6) of all the radiators in one column in each case, in order to supply them, and a horizontal distributor (11) is in turn arranged behind the vertical distributors, in order to supply them. The surveillance radar antenna according to the invention can be used, for example, in the X band instead of a conventional reflector antenna, it then being possible to achieve a considerably lower sidelobe level and polarisation which can be changed over more exactly, as well as greater mobility as a result of a smaller volume. <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 13/02 (2006.01); H01Q 21/06 (2006.01); H01Q 21/24 (2006.01); H01Q 21/28 (2006.01)
CPC (source: EP)
H01Q 13/0258 (2013.01); H01Q 21/064 (2013.01); H01Q 21/245 (2013.01); H01Q 21/28 (2013.01)
Citation (search report)
- [E] EP 0543509 A2 19930526 - ELECTROMAGNETIC SCIENCES INC [US]
- [Y] WO 8909501 A1 19891005 - FORTEL TECHNOLOGY LTD [GB], et al
- [Y] EP 0470786 A2 19920212 - GOULD HARRY J [US]
- [A] DE 3915048 A1 19901115 - SIEMENS AG [DE]
- [A] EP 0024808 A1 19810311 - MARCONI CO LTD [GB]
- [A] PATENT ABSTRACTS OF JAPAN vol. 3, no. 66 (E - 115) 7 June 1979 (1979-06-07)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0570863 A2 19931124; EP 0570863 A3 19940413; EP 0570863 B1 19990414; DE 59309507 D1 19990520
DOCDB simple family (application)
EP 93107897 A 19930514; DE 59309507 T 19930514