Optically transparent broadband and polarization insensitive microwave metamaterial absorber

Xiao, Houdi; Qu, Zhipeng; Lv, Mingyun; Du, Haiyan; Zhu, Weiyu; Wang, Chuanzhi; Qin, Ruiru

doi:10.1063/1.5120579

Cited by 24 publications

(5 citation statements)

References 43 publications

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“…The production flow chart of the sample is shown in Figure 9. The preparation process was consistent with that described in our previous paper [38]. Firstly, the conductive glass was obtained by coating the ultra-white glass with ITO film by the magnetron sputtering technique.…”

Section: Experiments Resultsmentioning

confidence: 91%

Highly Transparent Broadband and Polarization-Insensitive Absorber Based on Metasurface

Xiao

Qin

et al. 2020

Applied Sciences

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A highly transparent polarization-insensitive metamaterial absorber with wideband microwave absorption is presented. The broadband absorption (6.0~16.7 GHz, absorptance > 85%) is achieved using three patterned resistive metasurfaces. The visible light transmittance of the absorber is as high as 85.7%. The thickness of the absorber is 4.42 mm, which is only 0.088 times of the upper-cutoff wavelength. A prototype sample is fabricated and measured to demonstrate its excellent performance. The experimental results agree well with the simulation results. In view of its wide band absorption, high transmittance, low profile, polarization insensitivity and wide incidence angle stability, the presented absorber has a wide range of potential applications.

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Section: Experiments Resultsmentioning

confidence: 91%

Highly Transparent Broadband and Polarization-Insensitive Absorber Based on Metasurface

Xiao

Qin

et al. 2020

Applied Sciences

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“…Metamaterial structures composed of basic atoms in artificial configurations have unprecedented new properties such as a negative refractive index [1], perfect imaging [2], and inverse Doppler effects [3]. Metamaterial-based absorbers [4][5][6][7],…”

Section: Introductionmentioning

confidence: 99%

“…Among these components, metamaterial absorbers (MAs), which tend to be lightweight and thin, have attracted a lot of attention. Since the first perfect MA was presented by Landy et al [14], different types of absorbers that enable single-band [6,15], multi-band [16][17][18], or broad-band absorption [5,[19][20][21][22][23][24], have been proposed. Metals are most commonly used for the resonance patterns and reflective grounds in most of the reported MAs.…”

Section: Introductionmentioning

confidence: 99%

An ultra-broadband and optically transparent metamaterial absorber based on multilayer indium-tin-oxide structure

Deng¹,

Lv²,

Sun³

et al. 2021

J. Phys. D: Appl. Phys.

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In this work, an ultra-broadband and polarization-insensitive metamaterial absorber (MA) with high optical transparency is presented. Indium-tin-oxide (ITO) films are used as frequency selective surfaces in multiple conductive layers and also as the reflective backplane. Numerical simulation analysis demonstrates that the absorptivity of the proposed absorber exceeds 90% in the frequency range from 10 to 75.5 GHz, corresponding to a relative absorption bandwidth of 153%. The proposed structure has a total thickness of 2.9 mm, which is approximately 1/10 of the free space wavelength of its lowest operating frequency. The absorber also has good polarization insensitivity due to its symmetric geometry. Moreover, for TE-polarized waves, the proposed absorber can maintain an absorptivity greater than 70% for frequencies ranging from 10 to 80 GHz as the incident angle is increased to 45°. For TM-polarized waves, it provides absorptivity of more than 80% at incident angles up to 60°. Surface current distribution on each conductive ITO layer was simulated to analyze the absorption mechanism of the MA. A prototype composed of 16 × 16 unit cells was fabricated and the experimental results show a good agreement with the numerical simulations. Due to its ultra-wideband absorption and wide-incident-angle stability, the proposed MA has potential value in electromagnetic applications such as optically transparent EM shielding and microwave radiation protection.

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“…[1,2] Conventionally, the traditional absorbing materials are divided into two categories, including filling type using lossy fillers and structure design type using resistance sheets. [3,4] Recently, microwave metamaterial absorbers (MMAs), which are composed of subwavelength periodic patterns and dielectric substrates, have been attracting extensive interest due to their excellent design ability. [5][6][7][8][9][10][11][12][13][14][15] By controlling the dimensions of the electric and magnetic components, the permittivity and permeability of metamaterials can be varied and the impedance of MMAs can be matched to free space.…”

Section: Introductionmentioning

confidence: 99%

Lightweight, Ultra‐Wideband, and Polarization‐Insensitive Metamaterial Absorber Using a Multilayer Dielectric Structure for C‐ and X‐Band Applications

Phan

Nguyen

et al. 2021

Physica Status Solidi (b)

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The design of a lightweight and ultra‐wideband absorber for C and X bands is still a challenge as the dimension of the absorber is relatively large in such a relatively low‐frequency band. Herein, an ultra‐wideband and lightweight metamaterial absorber (MMA) is presented for C‐ and X‐band applications. The unit cell of the proposed MMA consists of four copper sectors loaded by lumped resistors and a continuous copper ground plane, which is printed on two FR‐4 substrates. Furthermore, an airgap separating the FR‐4 layers is used as the active substrate medium of the MMA to achieve both ultra‐wideband absorption spectra and lightweight design. The MMA is investigated by simulation and measurement, showing that a good agreement is achieved. The result indicates that the absorptivity of the MMA under both transverse electric (TE) and transverse magnetic (TM) polarizations is greater than 90% in a wide range from 3.7 to 13.6 GHz for all polarization angles. Compared to other reported broadband absorbers, the proposed MMA shows an ultra‐wide absorption bandwidth and a lightweight design, which demonstrates a great potential for C‐and X‐band applications.

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Optically transparent broadband and polarization insensitive microwave metamaterial absorber

Cited by 24 publications

References 43 publications

Highly Transparent Broadband and Polarization-Insensitive Absorber Based on Metasurface

Highly Transparent Broadband and Polarization-Insensitive Absorber Based on Metasurface

An ultra-broadband and optically transparent metamaterial absorber based on multilayer indium-tin-oxide structure

Lightweight, Ultra‐Wideband, and Polarization‐Insensitive Metamaterial Absorber Using a Multilayer Dielectric Structure for C‐ and X‐Band Applications

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