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

O. A. Iupikov, M. V. Ivashina, K. Pontoppidan, P. H. Nielsen, C. Cappellin, Niels Skou, Sten Schmidl Søbjærg, A. Ihle, D. Hartmann, K. v. 't Klooster, P. H. Nielsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

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 phased-array 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.
Original languageEnglish
Title of host publicationProceedings of the 9th European Conference on Antennas and Propagation (EuCAP)
Number of pages5
PublisherIEEE
Publication date2015
ISBN (Print)788890701856
Publication statusPublished - 2015
Event9th European Conference on Antennas and Propagation - Lisbon, Portugal
Duration: 12 Apr 201517 Apr 2015
http://www.eucap2015.org/

Conference

Conference9th European Conference on Antennas and Propagation
CountryPortugal
CityLisbon
Period12/04/201517/04/2015
Internet address

Keywords

  • Radiometers
  • Reflector antenna
  • Phase array feed

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