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Journal articles
Fast Antenna Far-Field Characterization via Sparse Spherical Harmonic Expansion
Abstract : A procedure is proposed to significantly reduce the amount of time to characterize 3-D antenna far-field patterns. The measured far field is expanded into spherical harmonics, and a sparse recovery algorithm is used to recover the spherical wave coefficients giving access to the field radiated by the antenna everywhere. A small number of measurement points are required, since the relevant information of the most antenna patterns is concentrated in only a few spherical wave coefficients. Sampling strategies enabling fast spherical scans are discussed, which makes the approach both efficient and easy to implement in existing far-field measurement facilities. Simulations are first provided to show the potentialities of this compressive sensing-based approach. The proposed strategy is then applied to characterize 3-D far-field patterns radiated by several antennas operating in different frequency bands measured in far field in direct line of sight configuration and in a compact antenna test range. Experimental results show that a saving in the number of measurement points up to 70% can be achieved compared with standard approaches. These results pave the way to a more efficient use of far-field measurement facilities. © 1963-2012 IEEE.
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01637413
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Thursday, January 21, 2021 - 3:14:57 PM
Last modification on : Thursday, January 20, 2022 - 12:54:15 PM
Long-term archiving on: : Thursday, April 22, 2021 - 7:25:58 PM
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Thursday, January 21, 2021 - 3:14:57 PM
Last modification on : Thursday, January 20, 2022 - 12:54:15 PM
Long-term archiving on: : Thursday, April 22, 2021 - 7:25:58 PM
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