Abstract: According to one embodiment, an image generating device includes an image former coupled to a radar that transmits and receives electro-magnetic radiation at multiple frequencies. The image former generates an image using information received from the radar, adjusts the image according to a material characteristic of the object, and combines the image with other images received at differing frequencies to form a resulting image.

Abstract: According to one embodiment, an image generating device includes an image former coupled to a radar that transmits and receives electro-magnetic radiation at multiple frequencies. The image former generates an image using information received from the radar, adjusts the image according to a material characteristic of the object, and combines the image with other images received at differing frequencies to form a resulting image.

Abstract: Generating a secondary beam (11) slightly offset from the main data collection beam (9) and obtaining hot clutter reference to be used in a conventional side lobe jammer processing algorithm (31). Advantage is taken of the typical geometries of a standoff jammer (1) which provides nearly matched dispersion characteristics of the jammer RF when viewed with the two received beams. The important parameter is dispersion relative to the received bandwidth. The secondary beam, which may be identical copy of the main beam except for target information, is placed offset by approximately two beam widths toward the jammer. The offset distance is chosen so that there is minimal and preferably no overlap in the main beam footprint on the ground but is as close as possible thereto. If there is overlap, then there is a chance that the target will appear in both beams and therefore be suppressed.

Abstract: Receiver dynamic range is improved while maintaining system processing fidelity by placing a processor control attenuator in front of the synchronous detector or other circuitry and A/D converter circuits. This is followed by a digital circuit which reinserts the attenuation that was taken out previously to maintain signal processing fidelity. The control for the attenuator function is from the processor and is determined by looking at the prior pulse repetition intervals (PRIs) of the radar system data and determining from that data what attenuator value to use for the next PRI. This is done for each range bin to be processed.

Abstract: A broadband phased frequency antenna array uses frequency steering with phase-shift stabilization. Phased frequency steering allows wider intermediate bandwidth than available from frequency steered arrays, with fewer phase shifters than required by phase steered arrays. For a given instantaneous bandwidth (such as for FM-chirp or frequency agility operations), the phased frequency steered array provides a straightforward trade-off between sidelobe level and the number of phase shifters. The antenna includes a linear array (10) of phase-shift/time-delay modules (FIG. 1b), each including (a) a phase-shift element (PSE) with a phase shifter (PS), and (b) a number of time-delay elements (TDE) coupled through respective time-delay feeds (TDF) to the phase shifter.