Implementation of polarization agility in planar phased-array antennas by means of interleaved subarrays

Journal article (2009)
Department
International Research Centre for Telecommunication and Radar (EEMCS) (TU Delft)
Copyright: © 2009 The Author(s); American Geophysical Union
DOI: https://doi.org/doi:10.1029/2009RS004175
Polarization Phased-array antennas Beam steering
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Published Date

21-10-2009

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Source:

Radio Science, 44, 2009

ISSN:

0048-6604

Source:

http://europa.agu.org/?view=article&uri=/journals/rs/rs0905/2009RS004175/2009RS004175.xml

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

International Research Centre for Telecommunication and Radar

Abstract

A method for ensuring polarization agility in conjunction with beam steering in planar array antennas is proposed. It relies on interleaving two subarrays with orthogonal, linear polarizations that, together, can generate arbitrary polarization states: adjustable linear, elliptical, and left- or right-handed circular. The complexity of the resulting system is comparable with that of standard, fully populated array antennas consisting of identical, linearly polarized elements. By dynamically controlling the amplitude and the phase of the signals fed to the subarrays, a stable polarization state can be maintained during beam steering. The concept is validated by numerically investigating an architecture obtained by interleaving nonuniform subarrays designed by means of a deterministic placement strategy. The effects of the mutual coupling between the different radiating elements are modeled and discussed.

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