(19)

(11)

EP 0 416 080 A1

(12)

(43) Date of publication: 13.03.1991 Bulletin 1991/11 (21) Application number: 90904898.0 (22) Date of filing: 14.03.1990

(51) International Patent Classification (IPC):  H01P 1/ 175( . ) H01Q 15/ 24( . ) (86) International application number: PCT/GB1990/000382 (87) International publication number: WO 1990/010958 (20.09.1990 Gazette 1990/22)

(84) Designated Contracting States: DE GB (30) Priority: 15.03.1989 GB 19890005904 (71) Applicant: CAMBRIDGE COMPUTER LIMITED Cambridge CB1 1PA (GB)	(72) Inventor: WESTWOOD, James St. Valentine Cambridge CB4 4DA (GB) (74) Representative: Abnett, Richard Charles, et al  REDDIE & GROSE 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)