Abstract: The invention concerns an active electronically steerable antenna including: a planar or quasi-planar radiating array configured to transmit and/or receive radiofrequency or microwave signals, and a plurality of three-dimensional U-shaped modules, each arranged behind, and coupled to, a respective planar or quasi-planar radiating subarray of N radiating elements arranged in two rows or columns, each of N/2 radiating elements, N being an even integer. Each three-dimensional U-shaped module comprises: a respective base wall; two respective side walls that are orthogonally arranged with respect to the respective base wall so as to form therewith a respective three-dimensional U-shaped structure, and are arranged, each, behind a respective row or column of N/2 radiating elements of the respective planar or quasi-planar radiating subarray; and respective transmit and/or receive electronics distributed on said respective base and side walls and configured to implement N respective transmit and/or receive modules.

Abstract: A Multi-Beam on Receive Electronically Steerable Antenna comprising a Tx array comprising a phased array of Tx antenna elements and having a geometric aperture with one or more pairs of parallel opposite sides; and an Rx array comprising a phased array of Rx antenna elements and having a geometric aperture with one or more pairs of parallel opposite sides. One or more pairs of parallel opposite sides of the geometric aperture of the Tx array are inclined relative to one or more pairs of parallel opposite sides of the geometric aperture of the Rx array.

Abstract: The invention concerns an active electronically steerable antenna including: a planar or quasi-planar radiating array configured to transmit and/or receive radiofrequency or microwave signals, and a plurality of three-dimensional U-shaped modules, each arranged behind, and coupled to, a respective planar or quasi-planar radiating subarray of N radiating elements arranged in two rows or columns, each of N/2 radiating elements, N being an even integer. Each three-dimensional U-shaped module comprises: a respective base wall; two respective side walls that are orthogonally arranged with respect to the respective base wall so as to form therewith a respective three-dimensional U-shaped structure, and are arranged, each, behind a respective row or column of N/2 radiating elements of the respective planar or quasi-planar radiating subarray; and respective transmit and/or receive electronics distributed on said respective base and side walls and configured to implement N respective transmit and/or receive modules.

Abstract: A Multi-Beam on Receive Electronically Steerable Antenna comprising a Tx array comprising a phased array of Tx antenna elements and having a geometric aperture with one or more pairs of parallel opposite sides; and an Rx array comprising a phased array of Rx antenna elements and having a geometric aperture with one or more pairs of parallel opposite sides. One or more pairs of parallel opposite sides of the geometric aperture of the Tx array are inclined relative to one or more pairs of parallel opposite sides of the geometric aperture of the Rx array.

Abstract: A SAR apparatus including: a radar transceiver to emit electromagnetic pulses and to provide a radar signal in response to echoes of the electromagnetic pulses; and a processing unit, configured to produce SAR images of moving objects from the radar signal. The processing unit includes: a first processing module to apply translational motion compensation to a central reference point of a moving object in a subaperture of the radar signal; a second processing module, to execute phase compensation with the single central reference point as reference; and a third processing module to apply phase compensation to the radar signal as a function of an estimated phase component the auxiliary point and of a normalization parameter to a distance in range between the central reference point and the auxiliary point.

Abstract: A SAR apparatus including: a radar transceiver to emit electromagnetic pukes and to provide a radar signal in response to echoes of the electromagnetic pukes; and a processing unit, configured to produce SAR images of moving objects from the radar signal. The processing unit includes: a first processing; module to apply translational motion compensation to a central reference point of a moving object in a subaperture of the radar signal; a second processing module, to execute phase compensation with the single central reference point as reference; and a third processing module to apply phase compensation to the radar signal as a function of an estimated phase component the auxiliary point and of a normalization parameter to a distance in range between the central reference point and the auxiliary point.

Abstract: A test apparatus for avionic sensors including a helicopter, an avionic sensor test pod equipped with at least one avionic sensor and a cable suspension system connecting the test pod to the helicopter.

Abstract: A method for the detection of moving objects by SAR images envisages the steps of: generating a pulse-repetition frequency signal starting from a radar signal; and generating a sequence of SAR images starting from the pulse-repetition frequency signal. In particular, SAR images with low azimuth resolution are generated by of coherent integration of the pulse-repetition frequency signal for a sub-aperture time shorter than an aperture time. In addition, the method envisages generating difference images through point-to-point difference between subsequent low azimuth resolution SAR images, and recognizing patterns associated to moving objects in the difference images.

Abstract: A method for the detection of moving objects by SAR images envisages the steps of: generating a pulse-repetition frequency signal starting from a radar signal; and generating a sequence of SAR images starting from the pulse-repetition frequency signal. In particular, SAR images with low azimuth resolution are generated by of coherent integration of the pulse-repetition frequency signal for a sub-aperture time shorter than an aperture time. In addition, the method envisages generating difference images through point-to-point difference between subsequent low azimuth resolution SAR images, and recognizing patterns associated to moving objects in the difference images.