(19)

(11)

EP 0 571 449 A1

(12)

(43) Date of publication: 01.12.1993 Bulletin 1993/48 (21) Application number: 92904543.0 (22) Date of filing: 13.02.1992

(51) International Patent Classification (IPC):  H01P 3/ 127( . ) H01P 11/ 00( . ) H01P 3/ 14( . ) (86) International application number: PCT/GB1992/000260 (87) International publication number: WO 1992/015125 (03.09.1992 Gazette 1992/23)

(84) Designated Contracting States: DE FR IT (30) Priority: 13.02.1991 GB 19910003067 (71) Applicant: QUASAR MICROWAVE TECHNOLOGY LIMITED Newton Abbot, Devon TQ12 6XU (GB)	(72) Inventors: HELME, Barry Newton Abbot Devon TQ12 6XU (GB) ALLEN, Terrence, Delmar Newton Abbot Devon TQ12 6XU (GB) (74) Representative: Craske, Stephen Allan  Craske & Co. Patent Law Chambers 15 Queens Terrace Exeter South Devon EX4 4HJ Exeter South Devon EX4 4HJ (GB)