(19)

(11)

EP 0 174 329 A1

(12)

(43) Date of publication: 19.03.1986 Bulletin 1986/12 (21) Application number: 85901046.0 (22) Date of filing: 05.03.1985

(51) International Patent Classification (IPC):  H01Q 15/ 24( . ) (86) International application number: PCT/GB1985/000094 (87) International publication number: WO 1985/004051 (12.09.1985 Gazette 1985/20)

(84) Designated Contracting States: BE DE FR GB NL SE (30) Priority: 06.03.1984 GB 19840005837 (71) Applicant: DECCA LIMITED Bracknell Berkshire RG12 1RG (GB)	(72) Inventor: ALISON, William, Benjamin, Walter Norwich Norfolk NR30 1JF (GB) (74) Representative: Cross, Rupert Edward Blount, et al  BOULT, WADE & TENNANT 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)