An Active Wideband and Wide-Angle Electromagnetic Absorber at Microwave Frequencies

Fan, Yifeng; Zhang, Hao Chi; Yin, Jia Yuan; Xu, Lexi; Nagarkoti, Deepak Singh; Hao, Yang; Cui, Tie Jun

doi:10.1109/lawp.2016.2544399

Cited by 57 publications

(15 citation statements)

References 11 publications

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“…3, in the working frequency range, the real part of impedance approximates 377 Ω and imaginary part is close to zero. According to (5), absorption is close to 1. It indicates that the MMA has a good impedance matching with free space.…”

Section: Absorption Mechanism Analysismentioning

confidence: 97%

“…In 2008, Landy proposed a perfect metamaterial absorber [1] based on the electromagnetic coupling characteristics of metamaterials. Then, many researchers have done a lot of research in designing MAs with good absorption properties, such as broadband absorption [2][3][4][5][6], multiband [7][8][9] and polarization insensitivity [10][11][12][13]. However, limited to large cell size and narrow bandwidth in the L-frequency range, the MAs will be difficult to be used in practical applications.…”

Section: Introductionmentioning

confidence: 99%

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Wideband Miniaturized Metamaterial Absorber Covering L-Frequency Range

Zhang¹,

Gao²,

Cao³

et al. 2019

RADIOENGINEERING

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Using a metallic incurved structure, a wideband miniaturized metamaterial absorber (MMA) covering L-frequency range (1-2 GHz) is proposed in this paper. Simulated results show that the bandwidth of the MMA with absorptivity more than 90% is 1-2.74 GHz, and its relative bandwidth is over 93%. The size of the unit cell is miniaturized to 20 × 20 mm 2 , and the profile is only 0.078λ (at the lower frequency of 1 GHz). Both simulated and experimental results show that high absorptivity for TE and TM polarization over a certain range of incident angles can be gained. By analyzing the effective impedance and the current distribution, the mechanism of the proposed MMA to attain broadband absorption is analyzed. The proposed MMA has a good application on UHF-RFID systems and 4G communications.

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Section: Absorption Mechanism Analysismentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Wideband Miniaturized Metamaterial Absorber Covering L-Frequency Range

Zhang¹,

Gao²,

Cao³

et al. 2019

RADIOENGINEERING

View full text Add to dashboard Cite

show abstract

“…Fan et al proposed an active metamaterial-based microwave absorber having wider band width for incidence angles up to 45 . 222 The proposed metamaterial consists of two layers: upper layer containing square metal patches connected by non-Foster loads, and interdigitated capacitors are connected between upper and lower substrates. Hu et al compared the microwave absorption properties of a traditional square lattice-based metamaterial absorber and honeycomb lattice-based absorbers.…”

Section: Microwave Absorbersmentioning

confidence: 99%

Applications of Microwave Materials: A Review

Raveendran

Sebastian

Raman

2019

Journal of Elec Materi

128

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The performance of microwave devices mainly depends on the properties of materials used in the fabrication. Knowledge of material properties at microwave frequencies is a prerequisite to select suitable materials for various microwave applications and vice versa. In this review, seven categories of materials and their applications in a microwave regime are elaborately discussed. The categories include magnetic materials, carbon-based materials, flexible or stretchable materials, biomaterials, phantoms, tunable materials and metamaterials. A brief overview of other important microwave materials such as low-loss ceramic dielectric materials, low-loss polymer ceramic composites, glass ceramics and multilayer ceramics is also given. The objective of this review is to expose the world of materials for wide microwave applications and thereby properly assisting the material selection for specific applications. Moreover, this review has dual significance. It helps material scientists to develop new materials and modify the properties of the available materials with respect to the application requirements. It also assists microwave engineers to select and use appropriate materials for different microwave applications.

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“…Polarization insensitive wide-band metamaterial absorber by using resistive loading and multi-layer structure sub wavelength unit cell is designed in [2,3]. Active metamaterial wide-band wide-angle absorber is designed and reported in [4]. An ultrathin wearable absorber is designed by using compact metamaterial unit cell in [5].…”

Section: Introductionmentioning

confidence: 99%

A Triple Band Polarization Insensitive Ultrathin Metamaterial Absorber for S- C- And X-Bands

Singh¹,

Abegaonkar²,

Koul³

2019

PIER M

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In this paper, design of a triple band ultrathin compact polarization insensitive metamaterial absorber for S-, C-and X-band applications is proposed. The proposed absorber consists of periodic arrangement of a modified triple circular slot ring resonator as unit cell printed on the top of a continuous metal backed FR-4 dielectric substrate. The proposed absorber is ultrathin having thickness of λ 0 /135.66 at the lowest absorption center frequency. The measured wide stable absorption bands of 0.40 GHz, 0.45 GHz and 0.47 GHz with absorption peaks of 97%, 96.45% and 98.20% at absorption center frequencies of 2.90 GHz, 4.18 GHz and 9.25 GHz respectively are observed. The temperature profile of absorber is measured by using lock in infrared thermography, and a temperature increase of 1 • C at absorbing frequency as compared to non-absorbing frequency is observed. The absorber is demonstrated to be polarization insensitive to TE and TM polarized angles of incidence of electromagnetic wave with wide angular stability up to 45 •. The absorber is fabricated and tested in an anechoic chamber. Experimental results agree well with measured ones.

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An Active Wideband and Wide-Angle Electromagnetic Absorber at Microwave Frequencies

Cited by 57 publications

References 11 publications

Wideband Miniaturized Metamaterial Absorber Covering L-Frequency Range

Wideband Miniaturized Metamaterial Absorber Covering L-Frequency Range

Applications of Microwave Materials: A Review

A Triple Band Polarization Insensitive Ultrathin Metamaterial Absorber for S- C- And X-Bands

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