A broadband third-order antenna-filter-antenna based frequency selective surface at high oblique angle of incidence

Anwar, Rana Sadaf; Yuan, Wei; Ning, Huansheng

doi:10.1109/piers-fall.2017.8293192

Cited by 8 publications

(8 citation statements)

References 21 publications

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“…As described and acquired parameters in the previous sub‐section, the FSS elements are made of copper, designed on a dielectric substrate with a value of dielectric constant 2.65 and loss tangent 0.001. The periodicity of the optimised FFSS‐CSS is 0.2 λ ₒ and an overall thickness of 0.173 λ ₒ, which is prominently smaller than presented in [18, 19]. Fig.…”

Section: Proposed Design Structure and Principlementioning

confidence: 85%

“…Exploiting the FSS design in [19] for improved performance, the proposed FFSS‐CSS design structure with three conducting and two dielectric substrate layers is shown in Fig. 1.…”

Section: Proposed Design Structure and Principlementioning

confidence: 99%

“…Moreover, large periodicity with a high count of conducting layers (five) configuration and relatively narrow BW make this design less productive in many smart applications. An improved FSS design presented in [19] with a periodicity of 0.25 λ ₒ and an overall thickness of 0.23 λ ₒ, includes three conducting layers and achieves a 3 dB FBW of 60% at an oblique incident angle of 60°.…”

Section: Introductionmentioning

confidence: 99%

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Miniaturised frequency selective surface based on fractal arrays with square slots for enhanced bandwidth

Anwar

Yuan

Mao

et al. 2019

IET Microwaves, Antennas & Propagation

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A novel approach is used to miniaturise the array size and broaden the bandwidth (BW) of a multilayer antenna‐filter antenna‐ based frequency selective surface (FSS). Although such FSSs have broadly been investigated for higher frequency selectivity and less thickness, they still own high periodicity and lower BW. The proposed fractal FSS with centre square slots consists of three metallic layers, separated by two dielectric substrates and periodicity of the unit cell is sub‐wavelength order (0.2λₒ). Central square slots are added in the external Minkowski fractal patches to increase the capacitive effect whereas fractal slots are etched on the ground placed in the middle for enhanced coupling. It is demonstrated through simulations that proposed design can effectively minimise the element size and enhance the BW. Owing to minuscule array size and symmetric fractal geometry, the presented structure is insensitive to higher incidence angles (up to 30°) for both polarisations. A prototype of the proposed FSS is also fabricated and tested in a microwave anechoic chamber. An equivalent circuit model, full wave simulation and measurement results agree well and demonstrate stable response with 3 dB fractional BW approaching 87.4 and 92%, respectively, at a normal angle of incidence.

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Section: Proposed Design Structure and Principlementioning

confidence: 85%

“…Exploiting the FSS design in [19] for improved performance, the proposed FFSS‐CSS design structure with three conducting and two dielectric substrate layers is shown in Fig. 1.…”

Section: Proposed Design Structure and Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Miniaturised frequency selective surface based on fractal arrays with square slots for enhanced bandwidth

Anwar

Yuan

Mao

et al. 2019

IET Microwaves, Antennas & Propagation

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“…However, the proposed structure is exceptionally compact and low-profile having a functional frequency of about 3.8 GHz and applicable to very low-frequency applications. Furthermore, Figure 10b shows fractal Koch elements of different levels used in a double layer FSS [97] and Figure 10c gives the topology of a three layer FSS proposed in [98] based on fractal complementary elements. Table 4 demonstrates a comparison of different multilayer FSS presented in recent researches, and it is observed that achieving higher FBW is a challenge with smaller unit size and reduced profile.…”

Section: Multilayer Fsssmentioning

confidence: 99%

“…FSSs have been used in various applications ranging in different frequency bands from RF, micro-, millimeter wave, and terahertz regions [97,114,115]. Some of the researches are well demonstrated in radio frequency identifications [9,116], wireless communications [117,118], shielding purposes/EMI/EMC problems [58,81,82,119], polarization transformation [120], stealth radomes [75,98,103,121], EMI protection from portable electronics/wireless charging pad [122,123], directional multi-band antenna [124], polarization detection [125], and sensing [28,126]. Although a diverse categorization of FSSs can be made based on their applications, here we investigate six types of FSSs in this survey including microwave absorbers, active FSSs, wearable FSS, meta-skin FSS, optical FSS, and textile FSSs.…”

Section: Fsss Based On Applicationsmentioning

confidence: 99%

Frequency Selective Surfaces: A Review

2018

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The intent of this paper is to provide an overview of basic concepts, types, techniques, and experimental studies of the current state-of-the-art Frequency Selective Surfaces (FSSs). FSS is a periodic surface with identical two-dimensional arrays of elements arranged on a dielectric substrate. An incoming plane wave will either be transmitted (passband) or reflected back (stopband), completely or partially, depending on the nature of array element. This occurs when the frequency of electromagnetic (EM) wave matches with the resonant frequency of the FSS elements. Therefore, an FSS is capable of passing or blocking the EM waves of certain range of frequencies in the free space; consequently, identified as spatial filters. Nowadays, FSSs have been studied comprehensively and huge growth is perceived in the field of its designing and implementation for different practical applications at frequency ranges of microwave to optical. In this review article, we illustrate the recent researches on different categories of FSSs based on structure design, array element used, and applications. We also focus on theoretical breakthroughs with fabrication techniques, experimental verifications of design examples as well as prospects and challenges, especially in the microwave regime. We emphasize their significant performance parameters, particularly focusing on how advancement in this field could facilitate innovation in advanced electromagnetics.

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