A low profile tunable microwave absorber based on graphene sandwich structure and high impedance surface

Zhang, Jin; Liu, Zhenguo; Lu, Wei‐Bing; Chen, Hao; Wu, Bian; Liu, Qifeng

doi:10.1002/mmce.22022

Cited by 23 publications

(16 citation statements)

References 27 publications

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“…In the past centuries, the research on the reflection and transmission characteristics of frequency selective surface (FSS) has attracted extensive attentions. [1][2][3][4][5] Numerous methods were developed for the analysis and optimization of FSS, such as the numerical algorithms [6][7][8][9][10][11][12][13] and the corresponding commercial software [1][2][3][4][5][14][15][16][17][18][19] and the approximate analytical methods. [20][21][22][23][24][25][26][27][28][29][30][31][32] Generally, the numerical algorithms are time consuming with fewer physical interpretation of the filter characteristic.…”

Section: Introductionmentioning

confidence: 99%

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Approximate analytical method for hexagonal slot frequency selective surface analysis

Luo

Meng

Zhu

et al. 2021

Int J RF Microw Comput Aided Eng

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In this article, an efficient approximate analytical method for hexagonal slot frequency selective surface (FSS) analysis is proposed. The main contribution of this article is to derive the tangential incident electric field along each oblique strip complementary to the hexagonal slot, so that Kirchhoff type circuit can be established according to the transmission line parameters and distributed sources. The current distribution is solved using Kirchhoff current law and continuity condition for potential. The transmission characteristic can then be calculated following Munk's scheme. Meanwhile, the physical nature of Munk's scheme is studied. The periodic circuit equations are derived from the corresponding electromagnetic field boundary conditions. The approximate closed-form expressions for aperture field and patch surface current distribution of common FSS elements can be calculated by the method of moments. From the analysis, it is known that the receiving current and transmitting current corresponds to the basis function and test function, respectively. Measured and simulated results of a symmetric hybrid radome composed of hexagonal slot are carried out to verify the accuracy and efficiency of the presented method. The CPU time is about 600 and 0.4 second for CST and the proposed method, respectively.

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Section: Introductionmentioning

confidence: 99%

“…One would have to adopt the curve-fitting scheme or a similar approach based on full-wave simulation. [1][2][3][4][5][21][22][23][24][25] Recently, an interference theory was developed for polygon-based broadband absorbers. However, the reflection and absorption rates are also simulated by commercial software.…”

Section: Introductionmentioning

confidence: 99%

Approximate analytical method for hexagonal slot frequency selective surface analysis

Luo

Meng

Zhu

et al. 2021

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…10. Then, surfaces like HIS are widely used as the ground to achieve low‐profile design 11‐18 . Recently, the circularly symmetric HIS (CSHIS) composed of arrays of patches arranged along a circular lattice is presented and the analytical model is studied 19 .…”

Section: Introductionmentioning

confidence: 99%

A low‐profile circularly polarized antenna based on a circularly symmetric high impedance surface

Tian

Ren

et al. 2021

Int J RF Microw Comput Aided Eng

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A circularly symmetric high impedance surface (HIS)‐based low‐profile circularly polarized antenna with stable phase center is investigated. The antenna consists of a series‐fed eight‐arm spiral slot antenna and a circularly symmetric HIS (CSHIS) used as the ground plane. As the use of CSHIS, the profile of antenna is decease to as low as 0.09λ (λ is the free space wavelength), while the phase center of the antenna maintains stable. Also, the gain of the presented antenna is enhanced compared with that utilizing HIS with rectangular unit cell. For verifying, a prototype of the antenna was fabricated and measured. The measured results show that the overlap bandwidth of 3‐dB axial ratio and impedance matching covers 1.14–1.45 GHz (23.9%), and the gain can reach as high as 7.79 dBic. Over the operation band, stable phase center also can be observed.

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“…Many researches on high-quality graphene have progressed rapidly due to improvements in laboratory procedures that allows the production of graphene with controlled properties [22]. So, a great effort has been done in this area for designed array antenna with frequency reconfigurablity [18][19][20][21] and the proposed 2×1 recongurable antenna array is shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable 2×1 CPW-Fed Rectangular Slot Antenna Array (RSAA) Based on Graphene for Wireless Communications

Elsheakh¹,

Dardeer²

2021

ACES

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This article presents a 2×1 CPW ultra wideband rectangular slot antenna array (UWB-RSAA) with a modified circular slot shape to support a high data rate for wireless communications applications. The proposed antenna array dimensions are 0.7λ×0.8λo×0.064λo at the resonant frequency 1.8 GHz. It is fabricated on Rogers RO4003 substrate and fed by using a coplanar waveguide (CPW). A graphene layer is added on one side of the substrate to realize frequency reconfigurability and improve the array gain. The proposed array acquires -10 dB impedance bandwidth of the RSAA that extends from 1.7 GHz to 2.6 GHz, from 3.2 to 3.8 GHz, and from 5.2 GHz to 7 GHz. The proposed array achieved a realized peak gain of 7.5 dBi at 6.5 GHz at 0 Volt bias with an average gain of 4.5 dBi over the operating band. When the graphene bias is increased to 20 Volt, the antenna bandwidth extends from 1 GHz to 4 GHz and from 5 to 7 GHz with a peak gain of 14 dBi at 3.5 GHz and an average gain of 7.5 dBi. The linearly polarized operation of the proposed array over the operating bands makes it suitable for short-range wireless communications .

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A low profile tunable microwave absorber based on graphene sandwich structure and high impedance surface

Cited by 23 publications

References 27 publications

Approximate analytical method for hexagonal slot frequency selective surface analysis

Approximate analytical method for hexagonal slot frequency selective surface analysis

A low‐profile circularly polarized antenna based on a circularly symmetric high impedance surface

Reconfigurable 2×1 CPW-Fed Rectangular Slot Antenna Array (RSAA) Based on Graphene for Wireless Communications

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