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:
Sep. 05, 1995
Filed:
Nov. 09, 1993
Toshihiro Sezai, Tokyo, JP;
National Space Development Agency of Japan, Tokyo, JP;
Abstract
An antenna system is formed by arranging a sub-antenna adjacent to a main antenna along the direction of the beam width to be reduced of the main antenna and in such a way that the beam axis of the sub-antenna is coincident with that of the main antenna. The antenna beam of this antenna system is scanned along the beam width direction and received signals obtained by the main and sub-antennas are set in phase and subjected to multiplication and signal processing by a multiplication circuit and signal processing circuit. When the ratio of the value of the synthetic reception pattern obtained by the multiplication to the maximum set value of the radar display device is not less than a preset value, the received signal of the main antenna corresponding to the range of angle of the beam width of the synthetic reception pattern is output as the final output signal instead of the synthetic reception pattern, and, when the ratio of the value of the synthetic reception pattern to the maximum set value is less than the preset value, the output is cut off.