scholarly journals Analysis and Characterization of Finite-size Curved Frequency Selective Surfaces

2015 ◽  
Vol 2 (1) ◽  
pp. 9 ◽  
Author(s):  
Francesco Mattiello ◽  
Giovanni Leone ◽  
Giuseppe Ruvio
Keyword(s):  
High Performance ◽  
Finite Size ◽  
Frequency Selective Surfaces ◽  
Spatial Filters ◽  
Planar Structures ◽  
Significant Research ◽  
Planar Array ◽  
Band Pass ◽  
Infrared Wavelengths ◽  
Frequency Selective

Frequency Selective Surfaces (FSSs) are spatial filters that are largely employed in radomes for radars and antennas where high performance is necessary. FSS can be categorised in terms of their frequency behaviour. Band-pass FSS structures are able to let the electromagnetic wave pass in certain frequency ranges and shield others, which are especially suitable for out-of-band stealth of radomes. The properties of frequency selectiveness of these screens are used at microwave and infrared wavelengths. By tuning the electrical size and geometry of the unit-cell (patch or aperture) different frequency behaviours of the structure are generated. Although their analysis and simulation is significantly simplified with the approximation of infinite and planar array, in some real applications FSS are required to be conformal to limited non-planar structures. The literature on the problem of characterizing finite-size and curved FSS has been sparse and more focused on the single application rather than on a unified approach. In the aim of synthesizing valuable techniques, this paper reviews significant research results on truncated and curved FSS which were presented in the dedicated literature.

Designed band-pass frequency selective surfaces with thermal transparency

2021 ◽  
pp. 127459
Author(s):  
Zihao Liu ◽  
Xiaopeng Zhou ◽  
Jie Chen ◽  
Yifeng Chen ◽  
Wei Xue ◽  
...  
Keyword(s):  
Frequency Selective Surfaces ◽  
Band Pass ◽  
Frequency Selective

scholarly journals Continuous-range tunable multilayer frequency-selective surfaces using origami and inkjet printing

2018 ◽  
Vol 115 (52) ◽  
pp. 13210-13215 ◽  
Author(s):  
Syed Abdullah Nauroze ◽  
Larissa S. Novelino ◽  
Manos M. Tentzeris ◽  
Glaucio H. Paulino
Keyword(s):  
Low Cost ◽  
Frequency Selective Surfaces ◽  
Angle Of Incidence ◽  
Spatial Filters ◽  
Continuous State ◽  
Subtractive Manufacturing ◽  
Time Requirements ◽  
Frequency Selective ◽  
Tunable Frequency ◽  
Electrical Components

The tremendous increase in the number of components in typical electrical and communication modules requires low-cost, flexible and multifunctional sensing, energy harvesting, and communication modules that can readily reconfigure, depending on changes in their environment. Current subtractive manufacturing-based reconfigurable systems offer limited flexibility (limited finite number of discrete reconfiguration states) and have high fabrication cost and time requirements. Thus, this paper introduces an approach to solve the problem by combining additive manufacturing and origami principles to realize tunable electrical components that can be reconfigured over continuous-state ranges from folded (compact) to unfolded (large surface) configurations. Special “bridge-like” structures are introduced along the traces that increase their flexibility, thereby avoiding breakage during folding. These techniques allow creating truly flexible conductive traces that can maintain high conductivity even for large bending angles, further enhancing the states of reconfigurability. To demonstrate the idea, a Miura-Ori pattern is used to fabricate spatial filters—frequency-selective surfaces (FSSs) with dipole resonant elements placed along the fold lines. The electrical length of the dipole elements in these structures changes when the Miura-Ori is folded, which facilitates tunable frequency response for the proposed shape-reconfigurable FSS structure. Higher-order spatial filters are realized by creating multilayer Miura-FSS configurations, which further increase the overall bandwidth of the structure. Such multilayer Miura-FSS structures feature the unprecedented capability of on-the-fly reconfigurability to different specifications (multiple bands, broadband/narrowband bandwidth, wide angle of incidence rejection), requiring neither specialized substrates nor highly complex electronics, holding frames, or fabrication processes.

scholarly journals Complementary frequency selective surface pair-based intelligent spatial filters for 5G wireless systems

2021 ◽  
Vol 30 (1) ◽  
pp. 1054-1069
Author(s):  
Ankush Kapoor ◽  
Ranjan Mishra ◽  
Pradeep Kumar
Keyword(s):  
Frequency Selective Surface ◽  
Dielectric Substrate ◽  
Spatial Filter ◽  
Spatial Filters ◽  
Band Pass ◽  
Frequency Selective ◽  
5 Ghz ◽  
Design Simplicity ◽  
Independent Behavior ◽  
The Impact

Abstract Frequency selective surface (FSS)-based intelligent spatial filters are capturing the eyes of the researchers by offering a dynamic behavior when exposed to the electromagnetic radiations. In this manuscript, a concept of creating complementary structures which stems from Babinet’s principle is illustrated. A hybrid complementary pair of FSS (CPFSS) comprising double square loop FSS (DSLFSS) and double square slot FSS (DSSFSS) on either side of the dielectric substrate is proposed. DSLFSS offers band-pass behavior and can be placed as a superstrate, whereas DSSFSS behaves as a band-stop intelligent spatial filter that blocks the radiations falling on it, thus making them applicable for use as a substrate. The technique utilized for analyzing DSLFSS and DSSFSS structures is based on the equivalent circuit modeling and transmission line methodology. The CPFSS structure offers the design simplicity, hence, suitable for placing them with the printed patch antenna radiators in wireless networking devices operating in sub-6 GHz 5G spectrum. DSLFSS offers band-pass behavior ranging from 2.99 to 5.56 GHz, whereas DSSFSS offers band-stop behavior ranging from 2.85 to 5.42 GHz covering all n77 (3.3–4.2 GHz), n78 (3.3–3.8 GHz), and n79 (4.4–5 GHz) bands of FR1 spectrum of sub-6 GHz 5G range. The passband and the stopband offered by the two structures of CPFSS geometry are stable to oblique angles of incidence and the proposed design also offers polarization-independent behavior. The thickness of the dielectric region existing within the pair of designed structures is critical for the location of the passbands and the stopbands. The impact of the overall thickness of the dielectric substrate on the passbands and stopbands is also reported in this article.

A Design for FSS on Curved Band-Pass Radome

2011 ◽  
Vol 337 ◽  
pp. 616-620
Author(s):  
Yao Cui ◽  
Xiao Guang Gao ◽  
Xin Yu Hou
Keyword(s):  
Frequency Response ◽  
Periodic Array ◽  
Frequency Selective Surfaces ◽  
Plane Model ◽  
Simulation And Optimization ◽  
Band Pass ◽  
Array Structure ◽  
Frequency Selective

Frequency Selective Surfaces(FSS) are periodic array structure, generally, FSS are designed on plane structure. In this article, design of FSS for curved radome will be developed. the parameter of FSS, which have some frequency response, will be given through simulation and optimization, and FSS plane model will be manufactured. The parameter will be modified, based on the configuration of streamline radome , the arrangement of FSS will be designed on curved radome, finally, the FSS Radome will be manufactured. it is shown that FSS under this method is satisfied.

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