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An Optimal Beamforming Algorithm for Phased-Array Antennas Used in Multi-Beam Spaceborne Radiometers

Oleg Iupikov (Institutionen för signaler och system, Antennsystem) ; Marianna Ivashina (Institutionen för signaler och system, Antennsystem) ; Katrine Pontoppidan ; P. Nielsen ; C. Cappellin ; N. Skou ; S. S. Søbjærg ; A. Ihle ; D. Hartmann ; K. Klooster
9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015 (2015)
[Konferensbidrag, refereegranskat]

Strict requirements for future spaceborne ocean missions using multi-beam radiometers call for new antenna technologies, such as digital beamforming phased arrays. In this paper, we present an optimal beamforming algorithm for phasedarray antenna systems designed to operate as focal plane arrays (FPA) in push-broom radiometers. This algorithm is formulated as an optimization procedure that maximizes the beam efficiency, while minimizing the side-lobe and cross- Polarization power in the area of Earth, subject to a constraint on the beamformer dynamic range. The proposed algorithm is applied to a FPA feeding a torus reflector antenna (designed under the contract with the European Space Agency) and tested for multiple beams. The results demonstrate an improved performance in terms of the optimized beam characteristics, yielding much higher spatial and radiometric resolution as well as much closer distance to coast, as compared to the present-day systems.

Nyckelord: radiometer, reflector antenna, phase array feed



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Denna post skapades 2015-12-10. Senast ändrad 2017-06-28.
CPL Pubid: 227899

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Antennsystem (2014-2017)

Ämnesområden

Informations- och kommunikationsteknik
Elektroteknik och elektronik

Chalmers infrastruktur

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