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A pod with a very long broadband time steered array antenna for PAMIR

: Wilden, H.; Saalmann, O.; Schmidt, A.; Peters, O.; Brenner, A.

Verband Deutscher Elektrotechniker e.V. -VDE-, Berlin; Informationstechnische Gesellschaft -ITG-:
EUSAR 2008, 7th European Conference on Synthetic Aperture Radar. Vol.1 : June 2 - 5, 2008, Friedrichshafen, Germany
Berlin: VDE-Verlag, 2008
ISBN: 978-3-8007-3084-1
European Conference on Synthetic Aperture Radar (EUSAR) <7, 2008, Friedrichshafen>
Conference Paper
Fraunhofer FHR

A reconfigurable pod-mounted antenna frontend configuration for the PAMIR SAR/GMTI imaging radar, an experimental active phased array system with a very high instantaneous bandwidth of 1.82 GHz in X-band is described. The pod accommodates a linear time and phase steered array antenna with a length of 4.25 m. Broadband beamforming together with wide azimuth scan capabilities (=± 45deg@1.82 GHz bandwidth) requires a switchable true time delay network with time increments equivalent to a fraction of a wavelength. The subarray structure including the time delay components and the total array performance are described. PAMIR serves as an ideal airborne platform for future broadband SAR/GMTI research activities including interferometric image formation.