DocumentCode :
1760699
Title :
Echo Suppression by Spatial-Filtering Techniques in Advanced Planar and Spherical Near-Field Antenna Measurements [AMTA Corner]
Author :
Foged, Lars ; Scialacqua, L. ; Mioc, F. ; Saccardi, Francesco ; Iversen, P.O. ; Shmidov, L. ; Braun, Roland ; Quijano, J. L. Araque ; Vecchi, Giuseppe
Author_Institution :
Microwave Vision Italy (MVI), Pomezia, Italy
Volume :
55
Issue :
5
fYear :
2013
fDate :
Oct. 2013
Firstpage :
235
Lastpage :
242
Abstract :
This paper presents a comparative investigation of two versatile error-mitigation techniques, applicable to general antenna near-field measurement scenarios with echo signals of unknown origin. Both techniques are based on spatial filtering of the measured field, taking advantage of a priori knowledge of the antenna´s size. The first approach takes advantage of the spatial-filtering properties of the spherical-wave expansion of the measured field. The second approach is based on the reconstruction of equivalent currents, and implements the spatial filtering as a direct consequence of the selected size and shape of the reconstruction surface. The investigation was performed using measured data on two different horns in both planar and spherical near-field scanning geometries. The presence and levels of echo pollution in the measurements were controlled by introducing known scattering objects in the anechoic chambers, and comparing with reference situations without disturbance.
Keywords :
anechoic chambers (electromagnetic); echo suppression; planar antennas; spatial filters; advanced planar antenna measurements; anechoic chambers; antenna size; echo pollution; echo signals; echo suppression; equivalent currents; error-mitigation techniques; near-field scanning geometries; reconstruction surface; scattering objects; spatial-filtering techniques; spherical near-field antenna measurements; spherical-wave expansion; Antenna measurements; Current measurement; Echo cancellers; Filtering; Pollution measurement; Scattering; Surface reconstruction; Near field; antenna measurements; equivalent source; inverse problem; spherical wave expansion;
fLanguage :
English
Journal_Title :
Antennas and Propagation Magazine, IEEE
Publisher :
ieee
ISSN :
1045-9243
Type :
jour
DOI :
10.1109/MAP.2013.6735525
Filename :
6735525
Link To Document :
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