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Session: WE1G8:00 AM Wednesday, May 26, 2010 Room: 209AB |
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Session: WE1G | Status and Trends in E-scan Radar for Air- and Spaceborne Applications. |
Chair: | Hans van Bezouwen, EADS Deutschland |
Co-Chair: | Wolfgang Holpp, EADS Deutschland |
Abstract: | Active Electronically Steered Array (AESA) antennas provide today's and future radars with an enormous degree of operational flexibility. These arrays constitute the very foundation of E-scan radars with highly enhanced capabilities, and open up a wide spectrum of new applications. This focused session will give an overview of the current status and trends in E-scan Radars, with emphasis on air- and spaceborne applications, and will illustrate actual European advances in the area of fighter radar, air- and spacecborne SAR/GMTI radar as well as spaceborne radar for Global Monitoring for Environment and Security. |
| | WE1G-1 | Status and Trends in AESA-based Radar | 8:00 AM-8:20 AM | W. Holpp, EADS Deutschland GmbH, Ulm, Germany |
(1202) | Radar technology, predominantly in the area of defence applications, is in a continuous process of extending its present capabilities. Especially Active Electronically Scanned Array (AESA) radars, with their unprecedented degree of operational flexibility, are currently about to revolutionise the performance of air- and spaceborne, naval and ground radars. The current status of AESA radar and the trends in system and technology advances are discussed. Trends on system level will be the use of MIMO-architectures and shared antenna apertures. | | |
WE1G-2 | The New Generation of European E-Scan Fighter Radars | 8:20 AM-8:40 AM | W. Holpp, EADS Deutschland GmbH, Ulm, Germany |
(1203) | Two European programmes towards an airborne E-scan radar have obtained major attention: AMSAR, a generic demonstrator for developing the technology required for an AESA radar and for proving its operational capabilities, and CAESAR that paves the way to the next generation of radar for Eurofighter. Future sub-array AESA architectures and multi-channel receivers will enable efficient jammer suppression by use of Adaptive Beam Forming. The technology basis of T/R-Modules will move to Gallium-Nitride, promising improvements in efficiency, output power and miniaturisation. | | |
WE1G-3 | The SAR/GMTI Airborne Radar PAMIR: Technology and Performance | 8:40 AM-9:00 AM | H. Wilden2, A. Brenner2, 1Fraunhofer FHR, Wachtberg, Germany, 2Fraunhofer FHR, Wachtberg, Germany |
(1434) | PAMIR, a multifunctional SAR/GMTI imaging radar, combines the tremendous research potential of an experimental active broadband phased array system with the wide area of imaging procedures of mono- and bistatic systems. With its two different reconfigurable antenna frontend configurations operating a very high simultaneous bandwidth of 1.8 GHz in X-band, a variety of controversal requirements can be investigated and experimentally explored. The broadband beamforming together with azimuth wide scan capabilities ( =+- 45°@1.8 GHz bandwidth of the antenna aperture) requires a switchable true time delay network with time increments equivalent to a fraction of a wavelength. The subarray structure including its time delay components are described. PAMIR serves as an ideal airborne platform for broadband SAR/GMTI research activities including interferometric image formation. | | |
WE1G-4 | Spaceborne SAR Systems and Technologies | 9:00 AM-9:20 AM | C. Heer, C. Fischer, C. Schaefer, Astrium, Friedrichshafen, Germany |
(1495) | Design and development of Spaceborne Synthetic Aperture Radar Systems is one of the major activities at EADS Astrium, Friedrichshafen, Germany. Examples of recent and current developments are the TerraSAR-X and the TanDEM-X Satellites, both operating at X-band with multi-polarization capability. At C-Band, the Sentinel-1 SAR Instrument is a further example for active phased array radar currently under development in our company. In addition to the design and manufacturing of ‘state of the art’ active phased array SAR sensors, new techniques and technologies are under preparation. The overall objective is to upgrade significantly the image performance, to enlarge the capabilities of spaceborne SAR and to improve the performance to cost ratio. For this, digital beamforming is a key element. | | |
WE1G-5 | Earth Observation Instruments with E-Scan Antennas State-of-the-Art and Outlook | 9:20 AM-9:40 AM | M. Ludwig1, C. H. Buck1, S. D'Addio1, R. Torres1, F. Rostan2, C. Schaefer2, R. Croci3, 1Esa/Estec, Noordwijk, Netherlands, 2Astrium GmbH, Friedrichshafen, Germany, 3Thales Alenia Space, Roma, Italy |
(1258) | Spaceborne radars with electronically scanned antennas are in use on European satellites since the launch of Envisat in March 2002. Despite the higher complexity and consequently cost, electronically scanned antennas are more and more attractive for spaceborne radar. The return materialises either in significantly better system performance or in newly gained system feasibility. The paper will discuss firstly state-of-the-art phased array technology as used for the European Sentinel 1 C-band SAR and explore secondly the capabilities of full digital beam forming implementation for the next generation of SAR systems. Thirdly phased arrays as a feasibility prerequisite in quasi bi-static radar for future ocean altimetry, exploiting GNSS signals will be discussed. Lastly reflector based e-scan antennas will be discussed which form a good compromise between complexity and flexibility as needed for SAR systems requiring high gain antennas. A Ka-band SAR application will be presented. | | |
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