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Proceedings Paper

Millimeter wave radar system on a rotating platform for combined search and track functionality with SAR imaging
Author(s): Uwe Aulenbacher; Klaus Rech; Johannes Sedlmeier; Hans Pratisto; Peter Wellig
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Paper Abstract

Ground based millimeter wave radar sensors offer the potential for a weather-independent automatic ground surveillance at day and night, e.g. for camp protection applications. The basic principle and the experimental verification of a radar system concept is described, which by means of an extreme off-axis positioning of the antenna(s) combines azimuthal mechanical beam steering with the formation of a circular-arc shaped synthetic aperture (SA). In automatic ground surveillance the function of search and detection of moving ground targets is performed by means of the conventional mechanical scan mode. The rotated antenna structure designed as a small array with two or more RX antenna elements with simultaneous receiver chains allows to instantaneous track multiple moving targets (monopulse principle). The simultaneously operated SAR mode yields areal images of the distribution of stationary scatterers. For ground surveillance application this SAR mode is best suited for identifying possible threats by means of change detection. The feasibility of this concept was tested by means of an experimental radar system comprising of a 94 GHz (W band) FM-CW module with 1 GHz bandwidth and two RX antennas with parallel receiver channels, placed off-axis at a rotating platform. SAR mode and search/track mode were tested during an outdoor measurement campaign. The scenery of two persons walking along a road and partially through forest served as test for the capability to track multiple moving targets. For SAR mode verification an image of the area composed of roads, grassland, woodland and several man-made objects was reconstructed from the measured data.

Paper Details

Date Published: 7 October 2014
PDF: 11 pages
Proc. SPIE 9252, Millimetre Wave and Terahertz Sensors and Technology VII, 925202 (7 October 2014); doi: 10.1117/12.2064824
Show Author Affiliations
Uwe Aulenbacher, Ingenieurbüro für Sensorik und Signalverarbeitung (Germany)
Klaus Rech, Ingenieurbüro für Sensorik und Signalverarbeitung (Germany)
Johannes Sedlmeier, Ingenieurbüro für Sensorik und Signalverarbeitung (Germany)
Hans Pratisto, Armasuisse (Switzerland)
Peter Wellig, Armasuisse (Switzerland)

Published in SPIE Proceedings Vol. 9252:
Millimetre Wave and Terahertz Sensors and Technology VII
Neil Anthony Salmon; Eddie L. Jacobs, Editor(s)

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