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:
Jul. 13, 1993
Filed:
Mar. 13, 1992
Applicant:
Inventor:
Kouichi Eguchi, Mitaka, JP;
Assignee:
Japan Radio Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q / ;
U.S. Cl.
CPC ...
343765 ; 343763 ; 343766 ; 342359 ;
Abstract
A stabilized antenna system. An inclination angle detector is mounted on an AZ frame and detects an inclination angle around an elevation, and the elevation of the antenna is controlled by a successive addition of the detected inclination angle to simplify control algorithm. Furthermore, the inclination angle detector includes a reciprocal combination filter for combining outputs of an inclinometer and a rate sensor. The reciprocal combination filter includes two reciprocal filters, and parameters of the reciprocal filters are adaptively controlled depending on frequency and amplitude of the inclination to ensure the reciprocity in a necessary frequency range.