(19)

(11)

EP 0 271 505 A1

(12)

(43) Date of publication: 22.06.1988 Bulletin 1988/25 (21) Application number: 87902973.0 (22) Date of filing: 30.03.1987

(51) International Patent Classification (IPC):  H01P 5/ 19( . ) H01P 5/ 12( . ) (86) International application number: PCT/US1987/000681 (87) International publication number: WO 1987/007438 (03.12.1987 Gazette 1987/27)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL SE (30) Priority: 28.05.1986 US 19860868211 (71) Applicant: Hughes Aircraft Company Los Angeles California 90045-0066 (US)	(72) Inventors: SCHELLENBERG, James, M. Huntington Beach, CA 92647 (US) YAU, Wing Torrance, CA 90503 (US) (74) Representative: KUHNEN, WACKER & PARTNER  Patent- und Rechtsanwaltsbüro, Alois-Steineckerstrasse 22 D-85354 Freising D-85354 Freising (DE)