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Bandpass frequency selective surface using asymmetrical slot four arms star geometry
Author(s) -
Gomes Neto Alfredo,
Costa e Silva Jefferson,
Nogueira de Carvalho Joabson,
da Costa Andrécia P.,
de Moura Leidiane Carolina M.
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29747
Subject(s) - band pass filter , fractional bandwidth , microwave , polarization (electrochemistry) , bandwidth (computing) , tunable metamaterials , band stop filter , physics , optics , frequency band , geometry , acoustics , electronic engineering , engineering , telecommunications , mathematics , chemistry , low pass filter , metamaterial
In this article, the authors proposed a bandpass frequency selective surface using the slot four arms star geometry. An expression to calculate the resonance frequency is introduced, for which results with difference <6%, when compared to measured ones, were obtained. The polarization dependence was discussed and a model based on two independent equivalent structures was successfully presented. Three prototypes were designed, fabricated, and characterized. A good agreement between simulated and measured results is observed. With the asymmetrical geometry, two bandpass bandwidths, separated by a notch band‐rejection, were achieved, a suitable characteristic to avoid co‐channel interferences. Furthermore, if an orthogonal polarization is applied, this notch band‐rejection can be converted to a bandpass bandwidth, providing a polarization filter behavior. The geometry simplicity and observed frequency response make the proposed FSS potentially attractive for many telecommunication systems. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1105–1109, 2016