A frequency and bandwidth tunable metamaterial absorber in x-band

Yuan, Hang; Zhu, Bo; Feng, Yijun

doi:10.1063/1.4919753

Cited by 85 publications

(33 citation statements)

References 22 publications

(21 reference statements)

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“…However, most traditional MMAs have some drawbacks in that the absorption level and working frequency are uncontrolled apart from changing the geometrical parameters of the unit-cell structure, which will limit their practical applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Nowadays, to achieve tunable properties of the MMAs, some effective methods have been proposed and demonstrated, such as machine [ 23 ], laser [ 24 , 25 , 26 ], temperature [ 27 , 28 ], and voltage modulation [ 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. However, the realization of the broadband tunable and strong absorption of the MMA is still a great challenge.…”

Section: Introductionmentioning

confidence: 99%

Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene

Huang

Cheng

et al. 2018

Materials

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We present a simple design for a broadband tunable terahertz (THz) metamaterial absorber (MMA) consisting of a complementary cross-oval-shaped graphene (CCOSG) structure and dielectric substrate placed on a continuous metal film. Both numerical simulation and theoretical calculation results indicate that the absorbance is greater than 80% from 1.2 to 1.8 THz, and the corresponding relative bandwidth is up to 40%. Simulated electric field and power loss density distributions reveal that the broadband absorption mainly originates from the excitation of continuous surface plasmon resonance (SPR) on the CCOSG. In addition, the MMA is polarization-insensitive for both transverse-electric (TE) and transverse-magnetic (TM) modes due to the geometry rotational symmetry of the unit-cell structure. Furthermore, the broadband absorption properties of the designed MMA can be effectively tunable by varying the geometric parameters of the unit-cell and chemical potential of graphene. Our results may find promising applications in sensing, detecting, and optoelectronic-related devices.

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Section: Introductionmentioning

confidence: 99%

Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene

Huang

Cheng

et al. 2018

Materials

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“…Several microwave absorbers based on active FSSs have been reported in the literatures [19][20][21][22][23][24][25]. In [19], a smart microwave absorber based on AFSS controlled by PIN diodes was presented, which was able to provide a variable reflectivity response over the frequency band from 9 to 13 GHz.…”

Section: Introductionmentioning

confidence: 99%

Design of a tuneable and broadband absorber using a switchable transmissive/reflective FSS

Zeng

Gao

Zhang

et al. 2018

IET Microwaves, Antennas & Propagation

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A new architecture for designing a tuneable wideband absorber using an active frequency selective surface (AFSS) is presented. The proposed AFSS is composed of 2‐D periodic array of two opposite directional anchor‐shaped metal strips printed on a dielectric substrate with no metallic screen on the back side, where positive–intrinsic–negative diodes as active components are embedded between each two anchor‐shaped strips. Biasing at different voltages to turn ON and OFF the diodes, AFSS structure can react as a switchable surface between transmissive and reflective states. While, the absorber consists of the designed AFSS structure and a metallic back‐plane, separated by a foam spacer. By dynamically changing the bias voltage of the diodes, the impedance of the proposed absorber can be adjusted and match with the free space at its resonant frequencies. Doing this, the presented absorber is able to offer a tuneable reflectivity level of less than −10 dB over a wide frequency band from 7 to 13.1 GHz. The detailed design of a switchable transmissive/reflective surface and a tuneable wideband absorber are reported. Both the simulated and measured results have verified the proposed performances. Furthermore, a good agreement between the measurement and simulation results has been obtained.

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“…The strong resonance from the metallic metamaterial and the loss from the dielectric substrate worked together contributing to nearly perfect absorption at one frequency. Based on this, various MAs with one-, two- or multi-band absorption were proposed [ 8 , 9 , 10 , 11 , 12 , 13 ]. However, highly effective absorption is always accompanied with the narrow bandwidth, which was the fundamental obstacle limited the practical application.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Resistive Metamaterial Absorber Loaded with Metallic Resonators for the Enhancement of Lower-Frequency Absorption

et al. 2018

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Resistive patch array incorporating with metallic backplane provided an effective way to achieve broadband metamaterial absorbers (MAs) in microwave frequency, and the outstanding construction contributed more flexible and diversified broadband absorption. In this paper, we attempted to load metallic resonators (MRs) to three-dimensional resistive MA to further enhance the lower-frequency absorption performance. Simulation showed that the partial absorption peak was separated to the lower frequency, while the rest of broadband absorption was unaffected. Meanwhile, after combining multi-unit of the proposed MAs, the stair-stepping broadband absorption was also achieved. Finally, three samples were fabricated. The agreements between simulations and experimental results demonstrated that resistive MA loaded with MRs provided an effective way for further enhancement of lower-frequency absorption with almost no change of the absorbing structure and lightweight characteristic. Thus, it was worthy to expect a wide range of applications to emerge inspired from the proposed attempt.

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A frequency and bandwidth tunable metamaterial absorber in x-band

Cited by 85 publications

References 22 publications

Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene

Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene

Design of a tuneable and broadband absorber using a switchable transmissive/reflective FSS

Three-Dimensional Resistive Metamaterial Absorber Loaded with Metallic Resonators for the Enhancement of Lower-Frequency Absorption

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