NDLI: Application of the TSWE algorithm to echo reduction of under-sampled offset spherical near-field measurements

Content Provider	IET Digital Library
Author	Saccardi, Francesco Mioc, Francesca Iversen, Per O. Foged, Lars J.
Abstract	In spherical near-field (NF) measurements, post-processing techniques based on spatial filtering have been presented as an interesting tool for the mitigation of echoes or stray signals deriving from the environment surrounding the antenna under test (AUT). The spatial filtering is very efficient in measurement scenarios with a stationary AUT. Whenever the AUT is rotating, in order to increase the effectiveness of the echo reduction, the antenna needs to be displaced outside the centre of rotation. Unfortunately, the number of acquisition samples needed to represent the AUT in offset configuration is higher with respect to one needed for the onset configuration. An innovative NF/far-field transformation algorithm for spherical offset measurements which allows to significantly reduce the number of measurement samples has been recently proposed. Such technique has been named translated spherical wave expansion (TSWE) and is based on the definition of new reference systems centred on the AUT rather than on the origin of the measurement sphere. In this study, the authors present the experimental investigation of the TSWE echo reduction properties for offset AUT.
Starting Page	549
Ending Page	553
Page Count	5
ISSN	17518725
Volume Number	12
e-ISSN	17518733
Issue Number	Issue 4, Mar (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/12/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2017.0641
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2018-01-12
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Testing Antenna under Test Echo Suppression Echoes Mitigation Electromagnetic Compatibility Filtering Method in Signal Processing Innovative NF-far-field Transformation Algorithm Interference NF Measurement Offset Configuration Production Facilities And Engineering Reference System Single Antenna Spatial Filter Spatial Filtering Stationary AUT Stray Signal Translated Spherical Wave Expansion TSWE Algorithm TSWE Echo Reduction Property Under-sampled Offset Spherical Near-field Measurement Reduction
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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