Design of compact patch type curved frequency selective surface

Begam, N.; Saha, Suman; Sarkar, Sushanta; Sarkar, Debasree; Sarkar, P. P.

doi:10.1002/mmce.21803

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…Gregoire et al transferred the prepared planar FSS to the curved surface for stitching after partitioning the surface. [14,15] However, the process of making these curved FSS is tedious, costly and not highly accurate. Flexible stretchable FSS [16][17][18][19][20] can be tightly adhered to nondevelopable surfaces via stretching, which is not only cost-effective but also convenient for the application scenarios since it can be applied and removed at any time.…”

Section: Introductionmentioning

confidence: 99%

3D Flexible Frequency Selective Surface with Stable Electromagnetic Transmission Properties

Fan

Pan

Chen

et al. 2022

Adv Materials Technologies

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Frequency selective surfaces (FSS) that can be tightly laminated to complex nondevelopable surfaces have a wide range of applications in many engineering areas. This paper presents a 3D flexible FSS prepared by mechanically guided 3D assembly, capable of being conformally adhered to complex surfaces, while maintaining stable frequency selective properties as well as transmission performance. The stretching strain applied to the prestrained ecoflex substrate can precisely tune and control the buckled 3D metal structures, which leads to the stretchability of the flexible FSS, introduces the increase of the inductance inside the metal cells, and expands the metal gap resulting in a reduction of the capacitance between the unit cells. The mutual correlation of capacitance and inductance ensures in the mechanism that the FSS transmission characteristics will not be significantly affected by the applied strain, as verified by calculations using the equivalent circuit method. Both the results obtained by the experiments and simulations indicate that the resonant frequency of the 3D flexible FSS is 5.7 GHz and the bandwidth at −10 dB is 0.94 GHz, while the resonant frequency shift will not exceed 0.45 Hz, and −10 dB bandwidth change will not exceed 0.32 GHz with applied strain of 17.8% in the ecoflex substrate. At the same time, the 3D flexible FSS maintains stable transmission performance for oblique incidence, with only 0.5 GHz frequency shift at 45° incidence. This stretchable flexible FSS with stable electromagnetic (EM) properties may find potential applications in EM shielding and spatial filtering due to its high flexibility, ready applicability, and cost‐effectiveness.

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