The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1994
Filed:
Dec. 10, 1992
Masahiro Uematsu, Tokyo, JP;
Takashi Ojima, Tokyo, JP;
Kazuo Kato, Yokohama, JP;
Makoto Ochiai, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
System Uniques Corporation, Kanagawa, JP;
Abstract
A satellite broadcast receiving antenna apparatus having an automatic tracking function for mobile bodies subject to radio wave interference due to obstacles is disclosed, in which phase correction circuits are arranged in the stage before a phase difference detection circuit, and the amount of phase shift of the phase correction circuits is adjusted by a CPU in such a manner that the peaks of the received signals are coincident in phase with each other at the time of detection thereof. The amount of phase shift associated with the coincidence is stored in a phase shift amount memory, and phase correction is effected on the amount of phase shift read from the memory is subsequent automatic tracking.