Design of a Dual-Band Electromagnetic Absorber With Frequency Selective Surfaces

He, Wenlong; Feng, Weisen; Guo, Sai; Wei, Jianfeng; Zhang, Haoyang; Huang, Qiulin; Li, Chengli; Liu, Miao; Jiang, Jianjun

doi:10.1109/lawp.2020.2981729

Cited by 37 publications

(12 citation statements)

References 24 publications

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“…Compared with other published works, our materials have better absorbing properties. For example, He et al 33 blended cashmere with ferronickel fiber to obtain a wave absorbing yarn, and wove the yarn into three-layer plain cloth, but the maximum reflectivity was only -8.79 dB. The best reflectivity of iron fiber absorbing fabric is -14dB.…”

Section: Em Wave Absorbing Properties Of the Fss/cif/cwfmentioning

confidence: 99%

Study on frequency selective/absorption/reflection multilayer composite flexible electromagnetic wave absorbing fabric

Zhang

Chen

Wang

et al. 2021

Textile Research Journal

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In order to realize wide-band, high-efficiency and flexible electromagnetic wave absorption, an effective method is the combination of different electromagnetic functional materials. How to use and make the multilayer materials with individual absorption, reflection and selective transmission characteristics is very important. In this work, multilayer composite flexible absorbing fabrics made of a frequency selective surface (FSS), carbonyl iron coated fabrics (CIFs) and copper-nickel plated conductive woven fabrics (CWFs) were prepared. The layered composite materials have a thin thickness, good flexibility and adjustable absorption band, which provide a reference for the development of lightweight and efficient electromagnetic wave absorbing materials. The influence of the resonance point, wave absorbent content and conductive layer on the absorbing properties were studied. CIF-3 with a surface density of 2046.9 g/m2 has the best absorption performance with a minimum reflectivity of –20.52 dB at 12.56 GHz. A one-layer FSS can broaden the absorption bandwidth; the broadening degree varies with the resonance point of the FSS, which also makes the absorption band adjustable. The bandwidth of f12/CIF-3 with reflectivity of less than –10 dB can reach 5.68 GHz. Besides, CWF is beneficial to increase the absorption intensity, and the best reflectivity of CIF-3/CWF can reach –27.73 dB. Furthermore, three-layer composites can improve the absorption strength and bandwidth of CIF at low frequency. Compared with CIF-3, the reflectivity of f14/CIF-3/CWF decreases 8.06 dB at 11.28 GHz, and the bandwidth is 4.72 GHz, which widens by 0.32 GHz.

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Section: Em Wave Absorbing Properties Of the Fss/cif/cwfmentioning

confidence: 99%

Study on frequency selective/absorption/reflection multilayer composite flexible electromagnetic wave absorbing fabric

Zhang

Chen

Wang

et al. 2021

Textile Research Journal

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“…[1][2][3] Among the electromagnetic microwave absorbers, [4][5][6][7][8][9][10][11][12] reduced graphene oxide (rGO) has been widely investigated due to its excellent tunability in dielectric broadband MA. [29,30] For example, Liu and Kim [29] proposed a high-capacitive metamaterial with a new structure of folded spiral conductors for ultrawide bandwidth absorbers. Through the combination of the high-capacitive spiral metamaterial with other conventional metamaterial for a medium-and a high-frequency resonance, an ultrawide MA bandwidth (4.7-50.0 GHz for −10 dB reflection loss) is realized.…”

Section: Introductionmentioning

confidence: 99%

Achieving Super Broadband Electromagnetic Absorption by Optimizing Impedance Match of rGO Sponge Metamaterials

Sun

Huang

et al. 2021

Adv Funct Materials

132

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The reduced graphene oxide (rGO) sponges exhibit exciting electromagnetic absorption (MA) performance in high-frequency range. However, it is still a great challenge to realize desirable MA property at low frequency (2-4 GHz) due to the great difficulty in balancing the good interfacial impedance matching and strong dielectric loss. Herein, the MA metamaterials based on rGO sponge with different unit shapes are reported. The relationship between the unit shape and MA performance is explored by experiment and simulation. The results show that frustum pyramid metamaterial exhibits ultrabroad band MA; the qualified absorption (the reflection loss lower than −10 dB) of electromagnetic wave can be achieved at 2.4-40 GHz. The average absorption intensity is −22.9 dB in the band of 2-40 GHz. Moreover, the bandwidth for strong absorption with an absorption rate of 99% (−20 dB) is up to 32 GHz. It is significant that the reflection loss has ignorant change even though the incident angle is increased from 5° to 40°. These are contributed to the excellent impedance matching and strong dielectric loss. These lightweight frustum pyramid metamaterials are very promising in the application for broadband electromagnetic protection.

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“…[1][2][3] Unlike the traditional absorbers, the frequency selective absorbers (FSAs) not only have one or more absorption band, but also have passbands or notch bands inside and outside the absorption band. [4][5][6][7][8] The FSA with passband can realize low insertion loss transmission of signals in the passband while realizing broadband absorption. The notched FSA can act as the ground plane in the reflection band and can absorb electromagnetic waves in the absorption band.…”

Section: Introductionmentioning

confidence: 99%

“…Absorption frequency selective surface as a multi‐resonance broadband absorber has recently become one of the research hotspots 1–3 . Unlike the traditional absorbers, the frequency selective absorbers (FSAs) not only have one or more absorption band, but also have passbands or notch bands inside and outside the absorption band 4–8 . The FSA with passband can realize low insertion loss transmission of signals in the passband while realizing broadband absorption.…”

Section: Introductionmentioning

confidence: 99%

Dual‐polarized frequency selective absorber with in‐band reflection response

Zhang

Yang

et al. 2022

Micro & Optical Tech Letters

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This paper proposes a frequency selective absorber with a notch reflection band. It consists of a lossy layer and a metal ground. The lossy layer is composed of the octagonal ring and meander‐line resonators connected in parallel on the same plane, which are used to obtain a wide absorption band and a notch reflection band, respectively. The simulation results show that there are two absorption bands from 2.22 to 6.8 GHz and 7.94 to 8.54 GHz, and there is a −3dB reflection band from 7.14 to 7.68 GHz. Moreover, the absorber also has the characteristics of compact structure, polarization‐independent, and angular stability. The equivalent circuit has been established and explained the performance of the proposed band‐notched absorber. The proposed band‐notched absorber is manufactured and measured, and the results are generally in good agreement with the full‐wave simulation results.

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Design of a Dual-Band Electromagnetic Absorber With Frequency Selective Surfaces

Cited by 37 publications

References 24 publications

Study on frequency selective/absorption/reflection multilayer composite flexible electromagnetic wave absorbing fabric

Study on frequency selective/absorption/reflection multilayer composite flexible electromagnetic wave absorbing fabric

Achieving Super Broadband Electromagnetic Absorption by Optimizing Impedance Match of rGO Sponge Metamaterials

Dual‐polarized frequency selective absorber with in‐band reflection response

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