Firearms – Implements – Sight devices
Patent
1993-11-09
1995-09-05
Tarcza, Thomas H.
Firearms
Implements
Sight devices
42378, G01S 316, G01S 328
Patent
active
054482470
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.
REFERENCES:
patent: 3750152 (1973-07-01), Waful
patent: 4416552 (1983-11-01), Hessener, Jr. et al.
patent: 5059966 (1991-10-01), Fujisaka et al.
patent: 5252983 (1993-10-01), Sezai
patent: 5296864 (1994-03-01), Sezai
Patent Abstracts of Japan--vol. 001, No. 098 (E-041) Aug. 31, 1977 & JP-A-52 032 293 (Koden Electronics Co. Ltd.) Mar. 11, 1977.
Patent Abstracts of Japan--Directivity Compression Receiving Equipment--JPA 52032293--Mar. 11, 1977 (Koden Electronics Co. Ltd.).
National Space Development Agency of Japan
Phan Dao L.
Tarcza Thomas H.
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