(19)
(11) EP 0 299 616 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.03.1990 Bulletin 1990/13

(43) Date of publication A2:
18.01.1989 Bulletin 1989/03

(21) Application number: 88305248.2

(22) Date of filing: 09.06.1988
(51) International Patent Classification (IPC)4: H01P 3/12, H01P 11/00
(84) Designated Contracting States:
AT BE CH DE ES FR GR IT LI LU NL SE

(30) Priority: 14.07.1987 GB 8716508

(71) Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.
London W1A 1EH (GB)

(72) Inventor:
  • Greed, Robert Brian
    Tiptree Essex CO5 0AS (GB)

(74) Representative: Cockayne, Gillian 
GEC Patent Department Waterhouse Lane
Chelmsford, Essex CM1 2QX
Chelmsford, Essex CM1 2QX (GB)


(56) References cited: : 
   
       


    (54) A waveguide arrangement


    (57) A waveguide arrangement is formed by two conductive sections separated by an insulating substrate. The waveguide walls are delined by channels cut in the conductive sections and slots plated with conductive material in the insulating substrate.







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