(19)

(11)

EP 0 628 217 A1

(12)

(43) Date of publication: 14.12.1994 Bulletin 1994/50 (21) Application number: 93906190.0 (22) Date of filing: 24.02.1993

(51) International Patent Classification (IPC):  H01Q 5/ 00( . ) H01Q 21/ 24( . ) H01Q 13/ 02( . ) (86) International application number: PCT/US1993/001622 (87) International publication number: WO 1993/017466 (02.09.1993 Gazette 1993/21)

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI NL (30) Priority: 24.02.1992 US 19920840334 (71) Applicant: CHAPARRAL COMMUNICATIONS, INC. San Jose, California 95131 (US)	(72) Inventor: WEBER, John Boulder Creek, CA 95006 (US) (74) Representative: Williams, John Francis, et al  WILLIAMS, POWELL & ASSOCIATES 34 Tavistock Street London WC2E 7PB London WC2E 7PB (GB)