Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1992-08-24
1993-10-12
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
G01S 316, G01S 328
Patent
active
052529835
ABSTRACT:
A method for reducing side lobes wherein an antenna system comprises a main antenna and a sub antenna which does not have an isotropic antenna pattern in a direction (X direction) of an orientation of a side lobe of the main antenna to be reduced which is arranged in such a way that the sub antenna adjoins the main antenna in the direction (Y direction) perpendicular to the X direction and the beam axis of the sub antenna coincides with the beam axis of the main antenna; wherein an antenna beam of the antenna system is scanned in the X direction and a signal received with the main antenna is multiplied by a signal received with the sub antenna on the condition that phases of both signals coincide with each other.
REFERENCES:
patent: 4612549 (1986-09-01), Geyer, Jr. et al.
patent: 4888593 (1989-12-01), Friedman et al.
patent: 5021793 (1991-06-01), Stangel et al.
IGARSS '89, 12th Canadian Symposium on Remote Sensing, Jul. 1989, Vancouver, Canada, pp. 268-270, Arai et al., "Beam Compressed Microwave Scanning Radiometer".
Blum Theodore M.
National Space Development Agency of Japan
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