AUTOMATIC POLARIZATION CONTROL SYSTEM FOR TVRO RECEIVERS - Patent 0389494

(19)

(11)

EP 0 389 494 A1

(12)

(43)	Date of publication:
	03.10.1990 Bulletin 1990/40

(21)	Application number: 88908737.0

(22)	Date of filing: 30.09.1988

(51)

International Patent Classification (IPC):

H04B 7/ 10^{( . )}
H01Q 21/ 24^{( . )}

H01Q 1/ 12^{( . )}

(86)	International application number:
	PCT/GB1988/000809

(87)	International publication number:
	WO 1990/003667 (05.04.1990 Gazette 1990/08)

(84)	Designated Contracting States:
	DE FR GB

(71)	Applicant: ASTEC INTERNATIONAL LIMITED
	Hunghom Kowloon (HK)

(72)	Inventors:
	MA, John, Y. Milpitas, CA 95035 (US) MCCRACKEN, David, H. San Jose, CA 96950 (US) WEISS, Steven Los Gatos, Ca 95030 (US) HOUSTON, Albert, C. Santa Cruz, CA 95060 (US)

(74)	Representative: Hitchcock, Esmond Antony, et al
	Lloyd Wise, Tregear & Co. Norman House 105-109 Strand London WC2R 0AE London WC2R 0AE (GB)

(54)	AUTOMATIC POLARIZATION CONTROL SYSTEM FOR TVRO RECEIVERS