......DE......GB..IT..............................R0257881EUROPEAN PATENT APPLICATIONA319890920EP87306986.819870806enenen862088219860829GB19890920198938198803021988094 4H 01Q 13/08 AdeGeschlitzte Hohlleiterantenne und ihre Anordnung in der GruppeenSlotted waveguide antenna and arrayfrAntenne à fente constituée par un guide d'onde et réseau de celle-ciDECCA LIMITED00233901REC/PL/28744001Western RoadBracknell Berkshire RG12 1RGGBChua, Lye WhattHigh Beeches Green DeneEast Horsley Surrey KT24 5RUGBCross, Rupert Edward Blountet al00042891BOULT, WADE & TENNANT 27 Furnival StreetLondon EC4A 1PQGBDEGBIT19890920198938

An antenna is formed with a hollow waveguide (1) having a narrow slot (2) in one face. A Vivaldi horn type radiator (5) is mounted with a coupling arrangement (3, 4) to couple energy in the waveguide through the slot to the radiator. The slot can be a non-radiating longitudinal slot, parallel to the waveguide axis, and several radiators may be mounted in a non-resonant slot along the length of the waveguide to form a linear resonant array.