On the Comparison Between the Spherical Wave Expansion and the Sources Reconstruction Method

A comparison between two well-known near field to far field (NF-FF) transformation methods is presented: the spherical wave expansion (SWE) and the sources reconstruction method (SRM). The goal of this paper is to show the methods performance for NF-FF transformation pointing out the advantages and...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2008-10, Vol.56 (10), p.3337-3341
Main Authors: Alvarez, Y., Las-Heras, F., Pino, M.R.
Format: Article
Language:English
Subjects:
Accuracy
Antenna diagnostics
antenna measurement
Antenna measurements
Antennas
Applied sciences
Computational efficiency
Equations
Exact sciences and technology
Far fields
near field to far field (NF-FF) transformation
Near fields
Noise measurement
Radiocommunications
Reconstruction
Reconstruction algorithms
Sampling methods
sources reconstruction
spherical wave expansion (SWE)
Spherical waves
Surface fitting
Surface reconstruction
Surface waves
Telecommunications
Telecommunications and information theory
Testing
Transformations
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Summary:A comparison between two well-known near field to far field (NF-FF) transformation methods is presented: the spherical wave expansion (SWE) and the sources reconstruction method (SRM). The goal of this paper is to show the methods performance for NF-FF transformation pointing out the advantages and limitations of each one. First, the computational cost is studied, showing its dependence with the antenna under test (AUT) electric size. Second, the NF-FF transformation accuracy of each method is compared for a fixed AUT electric size, analyzing also the influence of the main parameters that affect the SRM and SWE accuracy. Third, the SRM capabilities are presented, with focus on the NF-NF transformation inside the minimum sphere. Practical applications of the SWE and SRM are illustrated by means of an example of NF-FF transformation and antenna diagnostics problem using measured NF data.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2008.929519