Extremely Wideband Metamaterial Absorber Using Spatial Lossy Transmission Lines and Resistively Loaded High Impedance Surface

Lin, Zhongchao; Zhang, Yu; Li, Liang; Zhao, Yutong; Chen, Jianzhong; Xu, Kai‐Da

doi:10.1109/tmtt.2023.3259530

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…In order to further demonstrate the advantages of our work in terms of important performance, Table 2 shows the detailed comparisons between the proposed design and other published absorber works for wide-angle applications. Compared with [5], [9], [14], [15], and [22], the proposed structure realizes a predictable higher absorption ratio under a large angle. The structure in [18] achieves high efficiencies under large angles, however, the usable angle and fractional bandwidth are narrower than our design.…”

Section: Absorber Design and Implementationmentioning

confidence: 99%

“…The indium tin oxide (ITO) film was employed in [7] and [8] to improve the wide-angle performance. In [9], the spatial lossy transmission line was proposed to realize a wide absorption band while maintaining a large oblique incident angle stability. The inkbased resistive layer was used in [10] to cope with the wideband RCS reduction under a planar structure.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Design of 3-D Microwave Absorber With 70° Angular Stability for C-Band and X-Band

Feng,

Zhu,

2024

IEEE Open J. Antennas Propag.

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This article presents the synthesis and design of 3-D microwave absorber with 70° angular stability for C-band and X-band. The operating principle is firstly investigated, where the absorber is considered as an energy convertor. With the help of our proposed universal equivalent transmission line (TL) model, the absorptive performance can be accordingly synthesized. Then, a design method for efficient absorption under large angles is presented. By selecting a proper synthesized angle (SA), the angular stability can be effectively improved. After that, the prototype with 70° angular stability is designed as an example with structural realization and practical implementation. Measurements agree well with synthesized and simulated results, successfully verifying the proposed design method. For specific C-band and X-band applications, the measured average absorption ratios (ARs) under normal incidence, 45° incidence, and 70° incidence are 94.2%, 94.0%, and 92.3%. Minimum measured ARs within the operating bandwidth are 88.4%, 81.5%, and 82.0% for normal, 45°, and 70° incidences. Besides, the proposed absorber element owns the advantage of simple structure with only one resistor. Such a class of microwave absorber is a potential candidate for wide coverage electromagnetic absorption.INDEX TERMS 3-D microwave absorber, angular stability, synthesis and design, universal equivalent transmission line model.

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Section: Absorber Design and Implementationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Design of 3-D Microwave Absorber With 70° Angular Stability for C-Band and X-Band

Feng,

Zhu,

2024

IEEE Open J. Antennas Propag.

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“…Compared with traditional wave absorbing materials, the advantageous metamaterial absorber can use sub-wavelength structure to regulate the EMW, which indicates that the metamaterial absorber can complete the wave regulation with a smaller size, which is embodied in the flexible conformal, system embedding and other important aspects. By using coding theory to design Salisbury screen [81] or metallic ring structural dipole resonances [82], they can realize the ultrawide bandwidth absorption, Lin et al utilize high impedance surfaces to achieve amazing absorption bandwidths of 2-110 GHz at absorption rates over 90% [83]. However, the current design structure of metamaterial absorber is not limited to the traditional sandwich structure, but also to the multilayer resonator and dielectric layer structure, to realize the adjustable or multi-function characteristics of the absorber.…”

Section: Metamaterials Absorber At Microwavementioning

confidence: 99%

Advancements in tunable and multifunctional metamaterial absorbers: a comprehensive review of microwave to terahertz frequency range

Liu,

Dong,

Sabri

et al. 2024

J. Phys. D: Appl. Phys.

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Over the past two decades, metamaterial absorbers have undergone significant advancements, evolving from microwave single-frequency designs to multi-frequency and broadband absorption, extending into the terahertz band. These absorbers have transitioned from unadjustable to adjustable and multifunctional configurations, enabled by the integration of adjustable materials, mechanical structures, and semiconductor devices. This article provides a comprehensive review of the progress achieved in the microwave to terahertz frequency range over the last five years. Key aspects covered include the absorbing mechanism of metamaterials in the microwave frequency band, with absorption efficiencies exceeding 90% for specific frequency ranges. The development of adjustable absorbers allows for frequency tunability within ±10% of the central frequency, while multifunctional absorbers enable concurrent control over absorption and reflection properties. In the terahertz regime, advanced electromagnetic simulations have led to absorber designs with bandwidths exceeding 50% of the central frequency, resulting in absorption efficiencies above 80% over the entire bandwidth. Integration of gallium nitride-based Gallium Nitride High Electron Mobility Transistors (GaN HMET) provides fast switching speeds below 100 nanoseconds, facilitating rapid reconfiguration of absorber functionalities. These advancements in metamaterial absorbers offer promising prospects for intelligent and integrated designs in future applications.

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“…Some of the most notable properties of graphene are its high mechanical strength, high thermal conductivity and high carrier mobility [4]. It is due to these properties that graphene has been studied in fields ranging from electronics and photonics to mechanics and building and infrastructure [5][6][7][8][9][10][11][12]. There are many applications of graphene in the terahertz band as a tunable adsorber (see, e.g., [13,14]), reconfigurable antennas (see, e.g., [15,16]).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Graphene Based Electronically Tunable Phase Shifter

Yasir,

Peinetti,

Savi

2023

Micromachines

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In this work, an enhanced tunable microwave phase shifter is presented. The phase shifter consists of three short circuited stubs and a tapered line. The stubs are connected to graphene pads. Graphene’s tunable conductivity is varied by a DC voltage. This in turn causes a reactance variation at the input of the tapered line, which causes a phase variation. The physical parameters of the stubs are optimized for a maximum reactance variation by the help of analytical models, circuit and full wave simulations. Measurements of an optimized prototype are performed and a dynamic phase variation of 59∘ is obtained with an amplitude variation of less than 1 dB.

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Extremely Wideband Metamaterial Absorber Using Spatial Lossy Transmission Lines and Resistively Loaded High Impedance Surface

Cited by 11 publications

References 21 publications

Synthesis and Design of 3-D Microwave Absorber With 70° Angular Stability for C-Band and X-Band

Synthesis and Design of 3-D Microwave Absorber With 70° Angular Stability for C-Band and X-Band

Advancements in tunable and multifunctional metamaterial absorbers: a comprehensive review of microwave to terahertz frequency range

Enhanced Graphene Based Electronically Tunable Phase Shifter

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