Examination of the effectiveness of FF MARS in a CATR through electromagnetic simulation

For more than a decade now, a measurement and post-processing technique involving modal filtering, named mathematical absorber reflection suppression (MARS), has been used very successfully to identify and subsequently extract range reflections in spherical, cylindrical and planar near-field antenna...

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Bibliographic Details
Published in:IET microwaves, antennas & propagation antennas & propagation, 2018-03, Vol.12 (4), p.542-548
Main Authors: Gregson, Stuart Fraser, Parini, Clive G, Newell, Allen C
Format: Article
Language:English
Subjects:
antenna feeds
antenna radiation patterns
antenna testing
CATR
compact antenna test ranges
computational electromagnetic simulations
computational electromagnetics
cylindrical near‐field antenna test systems
electromagnetic wave reflection
electromagnetic wave scattering
far‐field mathematical absorber reflection suppression
feed spill‐over
FF MARS effectiveness
flexible EM simulation tool
measured FF pattern data simulation
measurement technique
modal filtering
planar antennas
planar near‐field antenna test systems
post‐processing technique
range reflection extraction
range reflections
scattering artefacts extraction
Special Issue: Selected Papers from the 11th European Conference on Antennas and Propagation (EuCAP 2017)
spherical near‐field antenna test systems
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Summary:For more than a decade now, a measurement and post-processing technique involving modal filtering, named mathematical absorber reflection suppression (MARS), has been used very successfully to identify and subsequently extract range reflections in spherical, cylindrical and planar near-field antenna test systems and far-field (FF) and compact antenna test ranges (CATRs). Much of the early work concentrated on verification through experimental testing; however, some additional validation was performed using computational electromagnetic (EM) simulations. These considered first FF and subsequently near-field cases. The recent development of an accurate, flexible EM simulation tool that enables the simulation of ‘measured’ FF pattern data as obtained from using a CATR has, for the first time, permitted the careful verification of the FF-MARS technique for a specified antenna under test (AUT) and CATR combination. This study presents simulated ‘measured’ FF antenna pattern data in the presence of a large scatterer and then verifies the successful extraction of the scattering artefacts. In addition to considering range reflections, feed spill-over is also treated. Results are presented and discussed.
ISSN:1751-8725
1751-8733
1751-8733
DOI:10.1049/iet-map.2017.0595