A Polarization-Dependent Frequency-Selective Metamaterial Absorber with Multiple Absorption Peaks

Deng, Guangsheng; Xia, Tianyu; Fang, Yong; Yang, Jun; Yin, Zhiping

doi:10.3390/app7060580

Cited by 11 publications

(7 citation statements)

References 32 publications

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“…At oblique incidence, an effective RCS reduction characteristic can also be achieved. Compared with previous works [21][22][23][24][33][34][35][36][37][38][39][40][41][42], our design of the matrix-type random coding MSs has better broadband RCS reduction and wide-angle incidence tolerance. The designed MS is expected to have potential applications in the field of stealth.…”

Section: Discussionmentioning

confidence: 88%

“…Then, six kinds of MSs based on split-ring resonator (SRR) structure were designed to explore the RCS reduction characteristic. Compared with previous works [21][22][23][24][33][34][35][36][37][38][39][40][41][42], our design has some advantages: Firstly, new random coding method with novel mechanism; Secondly, the structure of basic unit is simple, which can achieve the characteristics of 180 • cross-polarization phase differences by simply rotating the metal cut-wire structure; Thirdly, our design presents the RCS reduction at lower frequency with high relative bandwidth compared with the works published before. Such a simple and effective design may provide some potential applications in the field of stealth.…”

Section: Introductionmentioning

confidence: 88%

“…By randomly arranging the basic units in GMS, the incident wave is irregularly reflected back to free space, the scattering energy at each directional beam is small. This designed GMS can be used to achieve the RCS reduction characteristic [37][38][39][40][41][42]. More recently, a GMS based on cruciform structure is proposed [33], which can be applied to the RCS reduction characteristic at low frequency ranges, but the relative bandwidth of designed GMS is narrow.…”

Section: Introductionmentioning

confidence: 99%

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Study of Energy Scattering Relation and RCS Reduction Characteristic of Matrix-Type Coding Metasurface

et al. 2018

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In this paper, we present a design of the linear polarization conversion metasurface (MS) for the broadband radar cross section (RCS) reduction based on split-ring resonator (SRR) structure in microwave region. The corresponding phase gradient can be obtained through the stable phase difference of basic units of polarization conversion MS. The designed polarization conversion MS is applied in coded electromagnetic (EM) matrix by defining two basic units “0” and “1”, respectively. Based on the principle of planar array theory, a new random coding method named by matrix-type coding is proposed. Correlative RCS reduction mechanism is discussed and verified, which can be used to explore the RCS reduction characteristic. The simulated linear polarization conversion rate of the designed structure is up to 90% in the frequency range of 6–15 GHz, and the RCS reduction results verify the theoretical assumptions. Two kinds of matrix-type coding MS samples are prepared and measured. The experimental results indicate that the reflectance of MS is less than –10 dB on average under normal incidence in frequency range of 5.8–15.5 GHz. The average RCS reduction is essentially more than 10 dB in frequency range of 5.5–15 GHz and the corresponding relative bandwidth is 92.7%, which reasonably agrees with simulation. In addition, excellent RCS reduction characteristic of the designed MS can also be achieved over a wide incident angle.

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Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Study of Energy Scattering Relation and RCS Reduction Characteristic of Matrix-Type Coding Metasurface

et al. 2018

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“…By adjusting the external electric field, the relative permittivity of LC can be continuous controlled and resonant frequency of unit cells simultaneous changed. Many electrically tuned devices based on LC technology have been reported, such as phase shifters [18,19], absorbers [20,21], and filters [22][23][24]. As shown in Figure 1a, the proposed three-dimensional phase shifter.…”

Section: Design and Simulationmentioning

confidence: 99%

Tunable Liquid Crystal Based Phase Shifter with a Slot Unit Cell for Reconfigurable Reflectarrays in F-Band

et al. 2018

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An electrically tuned phase shifter based on the single slot unit cell and liquid crystal for a reconfigurable reflectarray antenna was presented. The simulation and measured results obtained at the F-band were used to demonstrate that the dielectric properties of a nematic state liquid crystal could be exploited to realize a slot unit cell phase shifter for the reconfigurable reflectarrays antennas. By reducing the inhomogeneous of the external electric field in the liquid crystal layer, a lower control voltage and improved model accuracy was obtained. In the experiments test, the achieved saturation bias voltage (10 V) was smaller than the previously reported structure, and the phase shift of the reflectarray greater than 300° was achieved in the frequency range 121.5–126 GHz. The maximum phase shift of 306° occurred at 124.5 GHz.

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“…For most researches on metamaterial absorbers, the absorption bandwidths include narrowband [4,6,7], multiband [8][9][10], and broadband [11][12][13][14][15]. In general, solar cells [16] and photodetectors [17] utilize broad-band absorbers, whereas narrow-band absorbers are predominantly utilized in sensor technology and thermal emitters. And the absorbers having only one absorption peak may be required for applications such as spectrum imaging and sensing.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-thin, Switchable Ultra-narrow Band Absorber for High-performance Terahertz Sensing

Peng²,

Zheng³

et al. 2023

J. Phys.: Conf. Ser.

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In this paper, an ultrathin terahertz metamaterial absorber consisting of Au pattern, polyimide and Au film is proposed. Based on the finite element method, the simulation consequences indicate that when its thickness is 9.4 m, there is a narrow absorption peak for the TE wave at 7.73 THz with near-perfect absorption of 99.8% and a full width at half maximum of 0.0896 THz, resulting from impedance matching and plasma resonance. And the absorption switching from a dual-band to a multi-band or a single-band to a dual-band absorption can be achieved for TM and TE waves by changing the incident angle or polarization angle. Furthermore, the absorption can also be switched from 99% to 0% by changing the polarization angles, and has a high tolerance of polarization angle down to more than 20 degrees. In addition, its application in the sensor is also studied at 7.73 THz, where its refractive index sensitivity and thickness sensitivity can achieve 1.2 THz/RIU and 0.065 THz/m, respectively. This might be utilized for monospectral imaging, biological diagnosis, and environmental monitoring.

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A Polarization-Dependent Frequency-Selective Metamaterial Absorber with Multiple Absorption Peaks

Cited by 11 publications

References 32 publications

Study of Energy Scattering Relation and RCS Reduction Characteristic of Matrix-Type Coding Metasurface

Study of Energy Scattering Relation and RCS Reduction Characteristic of Matrix-Type Coding Metasurface

Tunable Liquid Crystal Based Phase Shifter with a Slot Unit Cell for Reconfigurable Reflectarrays in F-Band

An Ultra-thin, Switchable Ultra-narrow Band Absorber for High-performance Terahertz Sensing

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