Abstract: The example non-limiting technology herein provides a Synthetic Aperture Radar (SAR) solution on board a micro-satellite that provides global revisit within 1 month; a cost below US$ 10 million; and satellite mass lower than 100 kg. One solution uses an inflatable Cassegrain type antenna with a phased beam steering array in the 1.2 GHz band.

Abstract: The example non-limiting technology herein provides a Synthetic Aperture Radar (SAR) solution on board a micro-satellite that provides global revisit within 1 month; a cost below US$ 10 million; and satellite mass lower than 100 kg. One solution uses an inflatable Cassegrain type antenna with a phased beam steering array in the 1.2 GHz band.

Abstract: A SYSTEM FOR DETECTING AND VISUALIZING TARGETS BY AIRBORNE RADAR, comprising a plurality of N antennae with a narrow beam in elevation and wide in azimuth, regularly disposed on a rotary base coupled to an engine, the elevation orientations of said antennae being staggered according to a defined pattern, each antenna being associated to a radar device endowed with computer means furnishing information relating to distance, azimuth, elevation and speed of fixed and moving obstacles above and below the plane of said rotary base. Some antennae point towards a place above the horizon, the angles of view being progressively descending so as to cover a volume that extends above and below the plane of the horizon, and may reach the ground. Said volume results from the sum of the volumes of superimposed cones, each cone corresponding to an elevation angle. The system combines the images of the N conical volumes to provide the pilot or operator a three-dimensional image.

Abstract: High precision radar to track aerial targets installed on the ground, in a container or in a vehicle, to determine the target parameters, such as azimuth angle (?a), elevation angle (?e), range, speed and flying direction and transmits them to a weapon system which comprises an array of two collinear antennas (19, 21) with narrow beam in elevation, installed on a platform (12) and rotating around a vertical axis at a rotational speed of, at least, 50 rpm, in which the direction of the said array varies between 0° and 90° by means of a positioning motor in elevation (18), and the precise target elevation angle (?e) is determined by interferometry. The precise target azimuth angle (9a) is determined through correlation between a signal detected by the said antennas (19, 21) with a +1/?1 step function, complemented by the search for the zero transition provided by the determination of the return pulse maximum.

Abstract: Weather radar system which uses antennas constituted by the elongated aperture of waveguides, and form at least an array (510, 520) mounted on a rotating horizontal (502), and the said apertures are as wide as one wavelength (?) and length higher than 20?, wherein the small aperture in azimuth ranges from 0.5° to 2° and is synthesized by high rotational speeds together with signal processing techniques such as ROSAR.

Abstract: A SYSTEM FOR DETECTING AND VISUALIZING TARGETS BY AIRBORNE RADAR, comprising a plurality of N antennae with a narrow beam in elevation and wide in azimuth, regularly disposed on a rotary base coupled to an engine, the elevation orientations of said antennae being staggered according to a defined pattern, each antenna being associated to a radar device endowed with computer means furnishing information relating to distance, azimuth, elevation and speed of fixed and moving obstacles above and below the plane of said rotary base. Some antennae point towards a place above the horizon, the angles of view being progressively descending so as to cover a volume that extends above and below the plane of the horizon, and may reach the ground. Said volume results from the sum of the volumes of superimposed cones, each cone corresponding to an elevation angle. The system combines the images of the N conical volumes to provide the pilot or operator a three-dimensional image.

Abstract: High precision radar to track aerial targets installed on the ground, in a container or in a vehicle, to determine the target parameters, such as azimuth angle (?a) f elevation angle (?e), range, speed and flying direction and transmits them to a weapon system which comprises an array of two collinear antennas (19, 21) with narrow beam in elevation, installed, on a platform (12) and rotating around a vertical axis at a rotational speed of, at least, 50 rpm, in which the direction of the said array varies between 0° and 90° by means of a positioning motor in elevation (18), and the precise target elevation angle (?e) is determined by interferometry. The precise target azimuth angle (9a) is determined through correlation between a signal detected by the said antennas (19, 21) with a +1/?1 step function, complemented by the search for the zero transition provided by the determination of the return pulse maximum.

Abstract: Weather radar system which uses antennas constituted by the elongated aperture of waveguides, and form at least an array (510, 520) mounted on a rotating horizontal (502), and the said apertures are as wide as one wavelength (?) and length higher than 20?, wherein the small aperture in azimuth ranges from 0.5° to 2° and is synthesized by high rotational speeds together with signal processing techniques such as ROSAR.