An Optimal Beamforming Algorithm for Phased-Array Antennas Used in Multi-Beam Spaceborne Radiometers
Paper i proceeding, 2015

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.

phase array feed

reflector antenna

radiometer

Författare

Oleg Iupikov

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Marianna Ivashina

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Katrine Pontoppidan

TICRA

P. Nielsen

TICRA

C. Cappellin

TICRA

N. Skou

Danmarks Tekniske Universitet (DTU)

S. S. Søbjærg

Danmarks Tekniske Universitet (DTU)

A. Ihle

HPS GmbH

D. Hartmann

HPS GmbH

K.V. 'T Klooster

ESTEC

9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015

7228764

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Elektroteknik och elektronik

ISBN

978-889070185-6