Portal de Periódicos da CAPES

X/Ka-Band Dual-Polarized Digital Beamforming Synthetic Aperture Radar

2017; IEEE Microwave Theory and Techniques Society; Volume: 65; Issue: 11 Linguagem: Inglês

10.1109/tmtt.2017.2690435

1557-9670

Chunxu Mao, Steven Gao, C. Tienda, Tobias Rommel, Anton Patyuchenko, Marwan Younis, Luigi Boccia, Emilio Arnieri, Srdjan Glisic, Uroschanit Yodprasit, Piotr Penkala, Miloš Krstić, Fan Qin, Oliver Schrape, Arkadiusz Koczor, Giandomenico Amendola, Vladimir Petrović,

Antenna Design and Optimization

This paper presents a digital beamforming (DBF) synthetic aperture radar (SAR) for future spaceborne earth observation systems. The objective of the DBF-SAR system is to achieve a low cost, lightweight, low-power consumption, and dual-band (X/Ka) dual-polarized module for the next-generation spaceborne SAR system in Europe. The architectures and modules of the proposed DBF-SAR system are designed according to a realistic mission scenario, which is compatible with the future small/microsatellites platforms. This system fills an important gap in the conception of the future DBF-SAR, facilitating a high level of integration and complexity reduction. The proposed system is considered not only the first demonstrator of a receive-only spaceborne DBF system, but also the first X/Ka-band dual-polarized SAR system with shared aperture. This paper presents a description of the proposed instrument hardware and first experimental validations. The concept and design of the DBF multistatic SAR system are discussed and presented first, followed by the design of subsystems such as DBF networks, microwave integrated circuit, and antennas. Simulated and measured results of the subsystems are presented, demonstrating that the proposed SAR instrument architecture is well-suited for the future SAR applications.