Analysis of selective surfaces characterization using free-space technique
Expósito, I.
;
Reis, J. R.
; Viegas, S.
;
Caldeirinha, R. F. S.
; Cuiñas, I. C
; Sanchez , M.
Measurement Vol. 246, Nº , pp. 116719 - 116719, March, 2025.
ISSN (print): 0263-2241
ISSN (online):
Scimago Journal Ranking: 1,18 (in 2023)
Digital Object Identifier: 10.1016/j.measurement.2025.116719
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Abstract
The free-space technique is the leading method for experimentally evaluating selective surfaces, including frequency selective surfaces (FSS), energy selective surfaces (ESS), or polarization selective surfaces (PSS). These surfaces selectively transmit or block electromagnetic waves based on specific frequencies, energy levels, or polarizations. This paper thoroughly analyzes the most recent experiments using the free-space technique, examining key elements such as surface holders, dimensions, measurement distances, scenario configurations, and the use of calibration/correction methods. Despite the absence of a standardized procedure or universally adopted guidelines, this study not only presents diverse measurement approaches from the literature but also offers practical insights for applying the free-space technique. Additionally, the paper details the steps for uncertainty budget calculation in these measurements and provides quantitative values for an actual SS measurement.
