Low-Profile Higher-order Narrowband Bandpass Miniaturized-Element Frequency Selective Surface

We present a low-profile miniaturized element frequency selective surface (MEFSS) with narrowband, second-order bandpass response. The miniaturized-element unit cell comprises a capacitively loaded parallel LC unit cell resulting in a narrowband bandpass response. A higher-order filtering response i...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2023-04, Vol.71 (4), p.1-1
Main Authors: Afzal, Waseem, Ebrahimi, Amir, Robel, Md. Rokunuzzaman, Rowe, Wayne S. T.
Format: Article
Language:English
Subjects:
Angular stability
Bandpass
Dielectrics
Electromagnetic radiation
Equivalent circuits
Frequency response
Frequency selective surfaces
Frequency stability
Higher-order
Impedance
Incidence angle
Integrated circuit modeling
low profile
Miniaturized-Element Frequency Selective Surfaces (MEFSSs)
Narrowband
Prototypes
Resonators
Unit cell
Wires
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Summary:We present a low-profile miniaturized element frequency selective surface (MEFSS) with narrowband, second-order bandpass response. The miniaturized-element unit cell comprises a capacitively loaded parallel LC unit cell resulting in a narrowband bandpass response. A higher-order filtering response is obtained by implementing five metallic-layers FSS formed by two layers of parallel LC resonators with an inductive impedance inverter layer in between them. The proposed design offers a very thin profile and an insensitive frequency response to the polarization of the incident electromagnetic wave. A design procedure is developed for the proposed FSS structure based on an equivalent circuit model analysis. Using this model, a prototype of MEFSS with second-order bandpass response at 3.34 GHz and a fractional bandwidth of 3.7% is designed, realized and characterized experimentally. The measurement results of the FSS verify the effectiveness of the FSS design procedure and stability of its frequency response up to 60° oblique incidence angles.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2023.3239171