Angularly Stable Frequency Selective Surface With Miniaturized Unit Cell

2015 ◽  
Vol 25 (7) ◽  
pp. 454-456 ◽  
Author(s):  
S. N. Azemi ◽  
K. Ghorbani ◽  
W. S. T. Rowe
Keyword(s):  
Frequency Selective Surface ◽  
Unit Cell ◽  
Stable Frequency ◽  
Frequency Selective

scholarly journals Optically Transparent Tri-Wideband Mosaic Frequency Selective Surface with Low Cross-Polarisation

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 622
Author(s):  
Nur Biha Mohamed Nafis ◽  
Mohamed Himdi ◽  
Mohamad Kamal A Rahim ◽  
Osman Ayop ◽  
Raimi Dewan
Keyword(s):  
Frequency Selective Surface ◽  
Performance Comparison ◽  
Unit Cell ◽  
Frequency Selective Surfaces ◽  
Transportation Services ◽  
Optically Transparent ◽  
Metallic Element ◽  
Frequency Selective ◽  
High Level ◽  
Polycarbonate Substrate

Acquiring an optically transparent feature on the wideband frequency selective surface (FSS), particularly for smart city applications (building window and transportation services) and vehicle windows, is a challenging task. Hence, this study assessed the performance of optically transparent mosaic frequency selective surfaces (MFSS) with a conductive metallic element unit cell that integrated Koch fractal and double hexagonal loop fabricated on a polycarbonate substrate. The opaque and transparent features of the MFSS were studied. While the study on opaque MFSS revealed the advantage of having wideband responses, the study on transparent MFSS was performed to determine the optical transparency application with wideband feature. To comprehend the MFSS design, the evolutionary influence of the unit cell on the performance of MFSS was investigated and discussed thoroughly in this paper. Both the opaque and transparent MFSS yielded wideband bandstop and bandpass responses with low cross-polarisation (−37 dB), whereas the angular stability was limited to only 25°. The transparent MFSS displayed high-level transparency exceeding 70%. Both the simulated and measured performance comparison exhibited good correlation for both opaque and transparent MFSS. The proposed transparent MFSS with wideband frequency response and low cross-polarisation features signified a promising filtering potential in multiple applications.

Flexible Serpentinelike Frequency Selective Surface for Conformal Applications With Stable Frequency Response

2019 ◽  
Vol 18 (7) ◽  
pp. 1477-1481 ◽  
Author(s):  
Sihong Chen ◽  
Taisong Pan ◽  
Zhuocheng Yan ◽  
Lingliang Dai ◽  
Yueyu Peng ◽  
...  
Keyword(s):  
Frequency Response ◽  
Frequency Selective Surface ◽  
Stable Frequency ◽  
Frequency Selective

A COMPACT STABLE FREQUENCY SELECTIVE SURFACE USING NOVEL Y-TYPE ELEMENT

2015 ◽  
Vol 57 ◽  
pp. 85-90 ◽  
Author(s):  
Rui Wu ◽  
Hou Zhang ◽  
Zi-Mu Yang ◽  
Tao Zhong ◽  
Yongfan Lin
Keyword(s):  
Frequency Selective Surface ◽  
Stable Frequency ◽  
Frequency Selective

scholarly journals X-band Band-pass Frequency Selective Surface for Radome Applications

2015 ◽  
Vol 16 (2) ◽  
pp. 281
Author(s):  
Tariq Rahim ◽  
Jiodong Xu
Keyword(s):  
Frequency Selective Surface ◽  
Unit Cell ◽  
Dielectric Substrates ◽  
Low Profile ◽  
X Band ◽  
Analysis And Synthesis ◽  
Unit Cells ◽  
Band Pass ◽  
Frequency Selective ◽  
Unit Cell Dimensions

A low profile multi layer miniaturized unit cell frequency selective surface (FSS) with second-order band-pass response is design. The metallic layers in the form of capacitive patches and inductive grids are separated by dielectric substrates. The non-resonant sub-wavelength unit cells with unit cell dimensions and periodicities on the order of 0.15λ. The overall thickness of approximately 0.03λ is designed which is useful at lower frequencies with long wavelengths. The FSS exhibit a stable frequency response to different angles of incidence and polarizations. The analysis and synthesis of the FSS is done using equivalent circuit method and simulated using CST microwave studio at X-band.

Polarization independent bandstop frequency selective surface for X-band application

Circuit World ◽  
2019 ◽  
Vol 46 (1) ◽  
pp. 25-31
Author(s):  
Kanchana D. ◽  
Radha Sankararajan ◽  
Sreeja B.S. ◽  
Manikandan E.
Keyword(s):  
Frequency Selective Surface ◽  
Transverse Magnetic ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Content Type ◽  
Low Profile ◽  
X Band ◽  
Measurement Results ◽  
Frequency Selective ◽  
Polarization Independent

Purpose A novel low profile frequency selective surface (FSS) with a band-stop response at 10 GHz is demonstrated. The purpose of this designed FSS structure is to reject the X-band (8-12 GHz) for the application of shielding. The proposed FSS structure having the unit cell dimension of 8 × 8 mm2, the miniaturization of the FSS unit cell in terms of λ0 is 0.266 λ0 × 0.266 λ0, where λ0 is free space wavelength. The designed FSS provides 4 GHz bandwidth with insertion loss of 15 dB. The transverse electric (TE) and transverse magnetic (TM) modes of the proposed design are same because of polarization independent characteristics and hold the angularly stable frequency response for both TE and TM mode polarization. Both the simulation and measurement results are in good agreement to each other. Design/methodology/approach The proposed FSS design contains square-shaped PEC material, which is placed on the substrate and the shape of the circle and rectangle is etched over the PEC material. The PEC material of the patch dimension is 0.0175 mm. The substrate used for the proposed design is FR4 lossy with the thickness of 0.8 mm and permittivity εr = 4.3 having a loss tangent of 0.02. Findings To find a new design and miniaturized FSS structure is discussed. Originality/value 100%

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