A New X-Band Experimental Airborne Radar for SAR and GMTI


  1. Damini, A.
  2. Haslam, G.
  3. Balaji B.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Defence Research and Development Canada – Ottawa has developed a new multifunction X-band wideband experimental airborne radar (XWEAR). The system consists of a high peak, high average power transmitter, a digital waveform generator, two wideband 8-bit analog to digital conversion channels for SAR/ISAR data collection and two narrowband 14-bit analog to digital conversion channels for GMTI radar data collection. The antenna is horizontally polarized and a novel multimode feed horn is used to derive two azimuthally displaced phase centers. The new radar maximizes the use of an existing digital scan converter as a controller, and commercially available components including the transmitter, A/D converters and computer boards. The timing circuitry, waveform generator, single and dual-channel receivers are custom built. The radar was designed to support research into SAR imaging of fixed and moving targets (ocean and land), time-frequency analysis of moving targets, clutter suppression for GMTI radar, ocean surveillance for small target detection and long-range surface surveillance, and tracking of land and ocean targets. Highlights of the data collection capabilities of the instrument include a swath width 16k points wide in the single channel SAR modes, 8k points wide in the two channel integrated SAR-GMTI modes and 4K points wide in the GMTI surveillance modes. The digitized data are recorded on a RAID at rates up to 65 Mbytes/second. Motion measurements consisting of data fr
Report Number
DRDC-OTTAWA-SL-2004-036 — Scientific Literature
Date of publication
25 Aug 2004
Number of Pages
Reprinted from
Proceedings EUSAR 2004, p 639-642
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