Large aperture vibration compensated millimeter wave sensor

Details Large aperture vibration compensated millimeter wave sensor Large aperture vibration compensated millimeter wave sensor

1999-04-20

2000-11-28

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342375, 343754, 343779, H01Q 322

Patent

active

061541745

ABSTRACT:
A millimeter wave imaging system includes a plurality of millimeter wave radiometer elements disposed in a sparse antenna array integrated into a lower surface of an airborne vehicle. The antenna elements preferably form a cross or T-shaped sparse array. Images are formed using interferometric techniques. Each radiometer element includes a receive antenna coupled to an electronic mirror which provides beam steering. To compensate for deflection of the airborne vehicle, a mechanical deflection measurement system is provided. Additional radiometer elements having transmitter antenna elements may be integrated into the sparse array to provide active illumination to enhance image formation and to operate as target designators.

REFERENCES:
patent: 4476471 (1984-10-01), Sato et al.
patent: 4588994 (1986-05-01), Tang et al.
patent: 5148182 (1992-09-01), Gautier et al.

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