Three‐dimensional lightweight metamaterial with ultra‐wideband microwave absorption

Yang, Yifan; Zhao, Wenbo; Wu, Zili; Zhao, Junming; Jiang, Tian; Chen, Ke; Feng, Yijun

doi:10.1002/mop.33151

Cited by 8 publications

(7 citation statements)

References 19 publications

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“…In some specific scenarios, it is expected to realize ultrawideband absorption covering from the UHF band up to the Ku band. Owing to the intrinsic advantages in the realization of broadband absorption, the 3D lossy structure is widely used in ultrawideband metamaterial absorbers [36]. Therefore, a composite strategy to realize a wideband absorption from the UHF band to the Ku band is proposed and experimentally verified as follows.…”

Section: Ultrawideband Absorber Based On Composite Strategymentioning

confidence: 99%

Ultrawideband lightweight absorber based on composite strategy with active control of absorption in the UHF band

Zhao

Jiang

Yang

et al. 2023

J. Phys. D: Appl. Phys.

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In this paper, a composite strategy has been developed to achieve continuous absorption coverage from the ultrahigh-frequency (UHF) band up to the Ku band. Based on this strategy, an ultrawideband (UWB) lightweight composite metamaterial absorber is fabricated and measured. The composite absorber comprises two cascaded parts operating in separated frequency bands. First, we design a polarization-insensitive tunable absorber in the UHF band based on the equivalent circuit model (ECM). The measured results indicate that the tunable UHF absorber obtains a tunable -10 dB reflection coefficient from 0.88 to 1.48 GHz. Furthermore, a lightweight 3D absorber is applied to cascade with the tunable UHF absorber to constitute a UWB composite absorber. The composite absorber achieves an ultrawideband absorption ranging from 0.78 to 18 GHz with a reflection coefficient below -10 dB. The overall composite structure is extremely lightweight with a surface density below 0.2897 g/cm2. This composite absorber also exhibits good angular stability, low profile, and polarization insensitiveness. We think this work is of great application potential for military and civilian applications.

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Section: Ultrawideband Absorber Based On Composite Strategymentioning

confidence: 99%

Ultrawideband lightweight absorber based on composite strategy with active control of absorption in the UHF band

Zhao

Jiang

Yang

et al. 2023

J. Phys. D: Appl. Phys.

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“…To demonstrate the superiority of the proposed MMA over the reported 3D absorbers with stand-up uniform resistive films [ 3 , 14 ], we have performed three more groups of simulations and the corresponding results are plotted in Figure 4 a together. To show the improvement clearly, we present the simulated results from 2 GHz to 22 GHz in Figure 4 b,c as well.…”

Section: Structure Design and Analysismentioning

confidence: 99%

“…The absorptivity is high but the bandwidth is not broad enough. In [ 3 ], a three-dimensional lightweight metamaterial with ultra-wideband microwave absorption was proposed and it can absorb over 90% of the incident wave energy in the range of 1.46–40 GHz with the 3D cross array structure. In [ 4 ], a three-dimensional microwave metamaterial absorber based on a vertical circular lattice array realizes a 90% absorptivity in the range of 3.5–31.8 GHz and a 95% absorptivity in the range of 4–31 GHz.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Broadband and Highly-Efficient Metamaterial Absorber with Stand-Up Gradient Impedance Graphene Films

Chen

et al. 2023

Materials

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Metamaterial absorbers (MMAs) that absorb electromagnetic waves among an ultra-broad frequency band have attracted great attention in military and civilian applications. In this paper, an ultra-broadband and highly-efficient MMA is presented. The unit cell of the proposed MMA was constructed with two cross-placed stand-up gradient impedance graphene films, which play a key role in improving impedance matching. Considering the trade-off between absorbing performance and processing complexity, in our design, we adopted the stand-up graphene films that have a gradient with three orders of magnitude in total. The simulated results of the proposed absorber show an ultra-broadband absorption (absorptivity > 90%) from 1.8 GHz to 66.7 GHz and a highly-efficient absorption (absorptivity > 97%) in the range of 2–21.7 GHz and 39.6–57 GHz. The field analysis was adopted to explain the mechanism of the proposed absorber. To validate this design, a prototype of 20 × 20 units was processed and assembled. The graphene films were processed with graphene conductive ink using screen print technology. The measured results are in good agreement with the simulated ones. The proposed absorber may find potential applications in the field of stealth technologies and electromagnetic interference.

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“…The metamaterial absorber based on electromagnetic resonance was first proposed in 2008, and its absorption at 11.5 GHz was greater than 88%. Later, researchers studied and designed various metamaterial absorbers [ 16 , 17 , 18 , 19 ], but their functions are usually fixed, which limits their application prospects. Therefore, the multifunctional metamaterial absorber has a great application value in terahertz systems.…”

Section: Introductionmentioning

confidence: 99%

A Thermally Controlled Multifunctional Metamaterial Absorber with Switchable Wideband Absorption and Transmission at THz Band

Wang

Fu²,

Wen³

et al. 2023

Materials

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This paper proposes a thermally controlled multifunctional metamaterial absorber with switchable wideband absorption and transmission at the THz band based on resistive film and vanadium dioxide (VO2). The function of the absorber can be adjusted by changing the phase transition characteristics of VO2. When VO2 is in a metallic state, the absorber can achieve wideband absorption with above 90% absorption from 3.31 THz to 10 THz and exhibits excellent absorption performance under a wide range of incident and polarization angles. When VO2 is in an insulating state, the metamaterial acts in transmission mode with a transmission coefficient of up to 61% at 5.15 THz. The transmission region is inside the absorption band, which is very important for practical applications. It has the advantages of having a simple structure, wideband absorption, and switchable absorption/transmission with potential application value in the fields of stealth of communication equipment and radar at the THz band.

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Three‐dimensional lightweight metamaterial with ultra‐wideband microwave absorption

Cited by 8 publications

References 19 publications

Ultrawideband lightweight absorber based on composite strategy with active control of absorption in the UHF band

Ultrawideband lightweight absorber based on composite strategy with active control of absorption in the UHF band

An Ultra-Broadband and Highly-Efficient Metamaterial Absorber with Stand-Up Gradient Impedance Graphene Films

A Thermally Controlled Multifunctional Metamaterial Absorber with Switchable Wideband Absorption and Transmission at THz Band

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