Development of Optically Transparent Ultrathin Microwave Absorber for Ultrahigh-Frequency RF Identification System

Okano, Yoshinobu; Ogino, Satoshi; Ishikawa, Kōji

doi:10.1109/tmtt.2012.2202680

Cited by 90 publications

(33 citation statements)

References 13 publications

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“…Numerous particular realizations of thin absorbers of this type have been reported, e.g., Refs. [19,21,29,30,53,63,66,106]. The majority of the known realizations are for the microwave frequencies, and they use metals, most commonly, copper, as the material for the ground plane and the capacitive patch array.…”

Section: Thin Layer Of An Artificial Magnetic At a Pec Plane (High-immentioning

confidence: 99%

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Thin Perfect Absorbers for Electromagnetic Waves: Theory, Design, and Realizations

2015

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With recent advances in nanophotonics and nanofabrication, considerable progress has been achieved in realizations of thin composite layers designed for full absorption of incident electromagnetic radiation, from microwaves to the visible. If the layer is structured at a subwavelength scale, thin perfect absorbers are usually called "metamaterial absorbers," because these composite structures are designed to emulate some material responses not reachable with any natural material. On the other hand, many thin absorbing composite layers were designed and used already in the time of the introduction of radar technology, predominantly as a means to reduce radar visibility of targets. In view of a wide variety of classical and new topologies of optically thin metamaterial absorbers and plurality of applications, there is a need for a general, conceptual overview of the fundamental mechanisms of full absorption of light or microwave radiation in thin layers. Here, we present such an overview in the form of a general theory of thin perfectly absorbing layers. Possible topologies of perfect metamaterial absorbers are classified based on their fundamental operational principles. For each of the identified classes, we provide design equations and give examples of particular realizations. The concluding section provides a summary and gives an outlook on future developments in this field.

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Section: Thin Layer Of An Artificial Magnetic At a Pec Plane (High-immentioning

confidence: 99%

“…[27] and later theoretically and experimentally developed in Refs. [11,19,106,140], and many others. For the equivalent scheme of the Dallenbach absorber it is not essential that the gap in Fig.…”

Section: Appendix C: Dallenbach Absorbers As Bianisotropic Huygens Lamentioning

confidence: 99%

Thin Perfect Absorbers for Electromagnetic Waves: Theory, Design, and Realizations

2015

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“…Interestingly, the ratios between thicknesses t and lattice constant a of MPA to the operation wavelength λ at 102 MHz are optimized to be only: t / λ = 1/816 and a / λ = 1/84. These values are the smallest among the currently-published structures212223242526272829. The nature of perfect absorption can be explained by the impedance matching theory30.…”

Section: Design Results and Discussionmentioning

confidence: 97%

Miniaturization for ultrathin metamaterial perfect absorber in the VHF band

Khuyen

Tung

Yoo

et al. 2017

Sci Rep

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An efficient resolution for ultrathin metamaterial perfect absorber (MPA) is proposed and demonstrated in the VHF radio band (30–300 MHz). By adjusting the lumped capacitors and the through vertical interconnects, the absorber is miniaturized to be only λ/816 and λ/84 for its thickness and periodicity with respect to the operating wavelength (at 102 MHz), respectively. The detailed simulation and calculation show that the MPA can maintain an absorption rate over 90% in a certain range of incident angle and with a wide variation of capacitance. Additionally, we utilized the advantages of the initial single-band structure to realize a nearly perfect dual-band absorber in the same range. The results were confirmed by both simulation and experiment at oblique incidence angles up to 50°. Our work is expected to contribute to the actualization of future metamaterial-based devices working at radio frequency.

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“…In addition, the metallic ground plate is thicker than the penetration depth of the incident wave. The full-wave simulations for one unit cell have done with CST Microwave Studio with periodic boundary condition (PBC) [13]. The boundary surfaces perpendicular to theincident E field are defined as perfect electric conductor (PEC) surfaces, while the surfaces perpendicular to the incident H field are defined as perfect magnetic conductor (PMC) surfaces.…”

Section: Design and Theorymentioning

confidence: 99%

Design and Characterization of a Dual-Band Metamaterial Absorber Based on Destructive Interferences

Jamilan¹,

Azarmanesh²,

Zarifi³

2014

PIER C

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Abstract-We present the design, characterization, and experimental verification of a dual-band metamaterial absorber (MA) in the microwave frequencies. The proposed MA consists of a metallic gammadion-shaped structure and a complete metal layer, separated by a dielectric spacer. The results show that the proposed MA has two absorption peaks at nearly 5.6 GHz and 6 GHz with absorption rates of 97% and 99%, respectively. The interference theory is used to investigate the physical mechanism of the proposed MA. The experimental results are in good agreement with the theoretical predictions. Furthermore, it is verified by simulations that the absorption of the proposed MA is almost insensitive to the incident wave polarization and oblique incident angle for the both TM and TE modes. This MA has broad prospect of potential applications.

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Development of Optically Transparent Ultrathin Microwave Absorber for Ultrahigh-Frequency RF Identification System

Cited by 90 publications

References 13 publications

Thin Perfect Absorbers for Electromagnetic Waves: Theory, Design, and Realizations

Thin Perfect Absorbers for Electromagnetic Waves: Theory, Design, and Realizations

Miniaturization for ultrathin metamaterial perfect absorber in the VHF band

Design and Characterization of a Dual-Band Metamaterial Absorber Based on Destructive Interferences

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