Novel Dual-Band Miniaturized Frequency Selective Surface based on Fractal Structures

Frequenz ◽  
2017 ◽  
Vol 71 (1-2) ◽  
pp. 57-63 ◽  
Author(s):  
Tao Zhong ◽  
Hou Zhang ◽  
Rui Wu ◽  
Xueliang Min
Keyword(s):  
Resonant Frequency ◽  
Free Space ◽  
Single Layer ◽  
Frequency Selective Surface ◽  
Anechoic Chamber ◽  
Dual Band ◽  
Fractal Structures ◽  
Frequency Selective ◽  
Good Agreement

Abstract A novel single-layer dual-band miniaturized frequency selective surface (FSS) based on fractal structures is proposed and analyzed in this paper. A prototype with enough dimensions is fabricated and measured in anechoic chamber, and the measured results provide good agreement with the simulated. The simulations and measurements indicate that the dual-band FSS with bandstop selectivity center at 3.95 GHz and 7.10 GHz, and the whole dimension of the proposed FSS cell is only 7×7 mm2, amount to 0.092λ0×0.092λ0, that λ0 is free space wavelength at first resonant frequency. In addition, the center frequencies have scarcely any changes for different polarizations and incidences. What’s more, dual-band mechanism is analyzed clearly and it provides a new way to design novel miniaturized FSS structures.

Dual‐band single‐layer quarter ring frequency selective surface for Wi‐Fi applications

2016 ◽  
Vol 10 (4) ◽  
pp. 435-441 ◽  
Author(s):  
David Ferreira ◽  
Iñigo Cuiñas ◽  
Rafael F.S. Caldeirinha ◽  
Telmo R. Fernandes
Keyword(s):  
Single Layer ◽  
Frequency Selective Surface ◽  
Dual Band ◽  
Frequency Selective ◽  
Ring Frequency

Polarization-independent single-layer ultra-wideband frequency-selective surface

2015 ◽  
Vol 9 (1) ◽  
pp. 93-97 ◽  
Author(s):  
Ramprabhu Sivasamy ◽  
Balaji Moorthy ◽  
Malathi Kanagasabai ◽  
Jithila V. George ◽  
Livya Lawrance ◽  
...  
Keyword(s):  
Free Space ◽  
Single Layer ◽  
Normal Incidence ◽  
Frequency Selective Surface ◽  
Unit Cell ◽  
Ultra Wideband ◽  
Attenuation Level ◽  
Wide Range ◽  
Frequency Selective ◽  
Polarization Independent

An ultra-wideband (UWB) frequency-selective surface (FSS) exhibiting band rejection characteristic is presented in this paper. The proposed unit cell has the size of 14 × 14 mm2 which is approximately 0.18 × 0.18 λo, where λo corresponds to free space wavelength at the lower cut-off frequency. The proposed UWB FSS consists of a single-layer substrate and provides 20 dB attenuation level for a wide bandwidth of 7.53 GHz at the normal incidence. The proposed FSS is polarization independent and also provides angular-independent operation for the EM wave incidences of 15°, 30° and 45° with 11.5 dB attenuation over a wide range from 4 to 14 GHz.

scholarly journals Miniaturized Angularly Stable Dual Band Frequency Selective Surface for K and Ka Band

2020 ◽  
pp. 100-103
Author(s):  
Singaram M ◽  
Krishna Kumar E ◽  
Chandraprasad V ◽  
Finney Daniel Shadrach ◽  
Gowthaman Manoharan
Keyword(s):  
Satellite Communication ◽  
Cell Structure ◽  
Single Layer ◽  
Frequency Selective Surface ◽  
Unit Cell ◽  
Dual Band ◽  
Angle Of Incidence ◽  
Band Frequency ◽  
Ka Band ◽  
Frequency Selective

A single layer novel compact frequency selective surface which is used in reflector antenna is designed and simulated. The proposed unit cell reflects electromagnetic waves in K and Ka band with maximum reflection occurring at 22.62 GHz and 35.44 GHz respectively. The designed FSS find its application in satellite communication. A crossed dipole structure in center and two-legged structure in corners with square loop in each quadrant makes the FSS unit cell structure. The FSS is designed with oblique incidence for transverse electric and transverse magnetic polarization with return loss 0.3 dB in 22.62 GHz and less than 0.5 dB in 35.44 GHz. The proposed work shows frequency independence against oblique angle of incidence. The simulated result from CST microwave studio is compared with other similar works.

scholarly journals Design of a Compact Passband Frequency Selective Surface with Stable Resonance

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Samineni Peddakrishna ◽  
Taimoor Khan ◽  
Binod Kumar Kanaujia ◽  
N. Nasimuddin
Keyword(s):  
Reflection Coefficient ◽  
Free Space ◽  
Single Layer ◽  
Frequency Selective Surface ◽  
Archimedean Spiral ◽  
Operating Wavelength ◽  
Frequency Selective ◽  
Spiral Type ◽  
Transmission And Reflection ◽  
Compact Planar

We propose a compact planar passband frequency selective surface (FSS) operating at the resonance frequency of 3.81 GHz. The proposed FSS is composed of single layer of the Archimedean spiral type with the interdigital capacitance between the corners of metallic patches printed on one side of the substrate. Compared to the operating wavelength, the size of the proposed single layer FSS is 0.066λ0 (λ0 is the free space wavelength at 3.81 GHz). The performance such as transmission and reflection coefficient of the proposed FSS demonstrates excellent resonance stability for different polarization and different incident angles. Finally, the optimized simulated results are validated with measured results by a fabricated prototype of 31×31 array elements on 170×170 mm2 substrate area.

scholarly journals Dual-Band Single-Layer Fractal Frequency Selective Surface for 5G Applications

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2880
Author(s):  
Bram Decoster ◽  
Stephanie Maes ◽  
Iñigo Cuiñas ◽  
Manuel García Sánchez ◽  
Rafael Caldeirinha ◽  
...  
Keyword(s):  
Single Layer ◽  
Frequency Selective Surface ◽  
Unit Cell ◽  
Dual Band ◽  
Central Metal ◽  
Fifth Generation ◽  
Measurement Results ◽  
Final Design ◽  
Frequency Selective ◽  
Bow Tie

Due to the global growth in popularity of Fifth Generation (5G) cellular communications, the demand for shielding against it has risen for a variety of applications, mainly related to cybersecurity but also to isolation, calm areas and so on. This research paper aims to provide a suitable dual-band fractal FSS (Frequency Selective Surface) for the 5G lower band frequencies: 750 MHz and 3.5 GHz. The unit cell is in the shape of a bow tie, where each of the triangular parts are Sierpiński triangles. One major addition to the unit cell is a central metal strip to make the manufacturing of the FSS more feasible and to tune the operation frequencies and bandwidths. As with each different stage of a fractal antenna, the different stages of the fractal FSS design behave differently. For this application, stage 2 is sufficient, as we are able to cover frequency bands among those included in the FR1 5G spectrum. Some equations were derived using linear regression in order to provide specific design tools for building an FSS. These equations have high accuracy and can be used to adapt the proposed design to other frequencies. Some other parameters, which are not represented in the aforementioned equations, can also be adjusted for minor tweaking of the final design. This design performs well except under large incidence angles. This should be taken into account when proposing the installation of a structure based on it. A good agreement between simulation and measurement results is observed.

Dual-Band Band-Pass Frequency Selective Surface Based on the Matryoshka Geometry with Angular Stability and Polarization Independence

2020 ◽  
Author(s):  
Alfredo Gomes Neto ◽  
Jefferson Costa e Silva ◽  
Alexandre Jean Rene Serres ◽  
Marina de Oliveira Alencar ◽  
Ianes Barbosa Grecia Coutinho ◽  
...  
Keyword(s):  
Frequency Selective Surface ◽  
Angular Stability ◽  
Dual Band ◽  
Band Pass ◽  
Frequency Selective
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