The Generalized Direct Optimization Technique for Printed Reflectarrays

A generalized direct optimization technique (GDOT) for the design of printed reflectarrays using arbitrarily shaped elements with irregular orientation and position is presented. The GDOT is based on the spectral domain method of moments (SDMoM) assuming local periodicity (LP) and a minimax optimiza...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2014-04, Vol.62 (4), p.1690-1700
Main Authors: Min Zhou, Sorensen, Stig B., Kim, Oleksiy S., Jorgensen, Erik, Meincke, Peter, Breinbjerg, Olav, Toso, Giovanni
Format: Article
Language:English
Subjects:
Accuracy
Accurate antenna analysis
Algorithms
Antenna measurements
Antennas
Arrays
Beams (radiation)
Broadband
Computer simulation
contoured beam
Generalized method of moments
irregular reflectarrays
Method of moments
Optimization
Optimization algorithms
Optimization techniques
reflectarray
satellite antenna
Scattering
Table lookup
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Description
Summary:A generalized direct optimization technique (GDOT) for the design of printed reflectarrays using arbitrarily shaped elements with irregular orientation and position is presented. The GDOT is based on the spectral domain method of moments (SDMoM) assuming local periodicity (LP) and a minimax optimization algorithm. The accuracy of the LP-SDMoM for the design of reflectarrays with irregularly positioned and oriented array elements has been verified by comparisons with full wave method of moments. Three contoured beam reflectarrays, forming a high-gain beam on a European coverage area, have been designed: a broadband design, a circularly polarized design using the variable rotation technique, and a design with irregularly positioned array elements. The latter has been manufactured and measured at the DTU-ESA Spherical Near-Field Antenna Test Facility. An very good agreement between simulated and measured patterns have been obtained, showing accuracies that are comparable to those obtained for conventional shaped reflectors.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2013.2254446