(19)
(11) EP 0 227 910 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.12.1987 Bulletin 1987/49

(43) Date of publication A2:
08.07.1987 Bulletin 1987/28

(21) Application number: 86115004

(22) Date of filing: 29.10.1986
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 29.11.1985 US 802917

(71) Applicant: ALLIED CORPORATION
 ()

(72) Inventors:
  • Acoraci, Joseph Henry c/o Allied Corporation
     ()
  • Sinsky, Allen Isaac c/o Allied Corporation
     ()

   


(54) Beam forming network for a butler matrix fed circular array


(57) 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.






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