Calculations of a wideband metamaterial absorber using equivalent medium theory

Huang, Xiaojun; Yang, Helin; Wang, Danqi; Yu, Shengqing; Lou, Yan-Chao; Guo, Ling

doi:10.1088/0022-3727/49/32/325101

Cited by 27 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… Ref. Manufacturing process (conductive material) Pattern shape Number of patterned layers Thickness (mm) Bandwidth (GHz) Maximum RCS reduction (dB) 40 Printing process (carbon ink) Square loop array 2 6.4 5–30.8 − 42 41 Etching (copper) Double square loop 1 4.3 0.9–1.8 − 41 42 (Carbon ink) Square array 2 3.5 8–18 − 27.5 43 Silk printing (carbon ink) Square array 2 7.6 5.7–18 − 49 23 Inkjet printing (CNT ink) Jerusalem Cross + mesh grid 2 5.1 8.2–44 − 43 This work Mechanical machining process (carbon ink) Double square loop 1 4.2 8–14.6 − 41 …”

Section: Resultsmentioning

confidence: 99%

Fabrication and characterization of resistive double square loop arrays for ultra-wide bandwidth microwave absorption

Jeong

Lee²,

Park

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Microwave absorbers using conductive ink are generally fabricated by printing an array pattern on a substrate to generate electromagnetic fields. However, screen printing processes are difficult to vary the sheet resistance values for different regions of the pattern on the same layer, because the printing process deposits materials at the same height over the entire surface of substrate. In this study, a promising manufacturing process was suggested for engraved resistive double square loop arrays with ultra-wide bandwidth microwave. The developed manufacturing process consists of a micro-end-milling, inking, and planing processes. A 144-number of double square loop array was precisely machined on a polymethyl methacrylate workpiece with the micro-end-milling process. After engraving array structures, the machined surface was completely covered with the developed conductive carbon ink with a sheet resistance of 15 Ω/sq. It was cured at room temperature. Excluding the ink that filled the machined double square loop array, overflowed ink was removed with the planing process to achieve full filled and isolated resistive array patterns. The fabricated microwave absorber showed a small radar cross-section with reflectance less than − 10 dB in the frequency band range of 8.0–14.6 GHz.

show abstract

Section: Resultsmentioning

confidence: 99%

Fabrication and characterization of resistive double square loop arrays for ultra-wide bandwidth microwave absorption

Jeong

Lee²,

Park

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…This technique is then extrapolated to the THz region for THz broadband MPA. The equivalent medium theory (EMT) 30 is applied to interpret the broadband absorption characteristics of the FSMA and provides a good agreement with the simulation. Interestingly, this method can be employed for various metamaterial full-sized structures to obtain the ultra-broadband absorption in both GHz and THz regions.…”

Section: Introductionmentioning

confidence: 84%

“…Here, the calculated broad absorbance and the effectively constitutive parameters such as the permittivity ( ε eff ) and permeability ( μ eff ) are retrieved from the reflection S 11 and the transmission S 21 , which detemine by the numerical simulation 32,33 . The effective impedance and the refractive index of the homogenous and isotropic effective medium are related to S 11 and S 21 by 30 :where , μ eff = n . Z eff and m is an integer corresponding to the branch index n ′; k 0 is the wave number in the free space.…”

Section: Broadband Absorption Interpretation Using Equivalent Medium mentioning

confidence: 99%

See 1 more Smart Citation

Controlled Defect Based Ultra Broadband Full-sized Metamaterial Absorber

Tran

Hai

et al. 2018

Sci Rep

View full text Add to dashboard Cite

Metamaterial full-sized absorber structures are numerically and experimentally investigated in GHz region and then examined in THz frequency. By manipulating monitoring the number and the position of the defect elements in conventional unit cells, the optimal integrative absorber structures are generated. The proposed structures provide an ultra-broadband absorbance in the operating frequency. The good agreement between simulation, measurement and theoretical analysis is observed with a 5 GHz-bandwidth corresponding to the absorption of 95%. In particular, we extrapolate the concept to THz region and demonstrate that, the method can be applied to increase the bandwidth of the metamaterial absorber to 5 THz, while maintaining the other characteristics. This structure can be applied to improve the performance of telecommunication systems such as micro-antenna, micro-electromagnetic transmitters and apply to imaging and sensing fields.

show abstract

“…1) With the deepening of research, metamaterials show increasingly higher prospects of application to many functional devices. 2,3) However, the use of metallic components in metamaterials will introduce considerable dissipation losses, which restrict the device applications. Recently, it was found that it is possible to obtain novel resonant devices by taking full advantage of the intrinsic losses of metamaterials.…”

mentioning

confidence: 99%

Novel quad-band terahertz metamaterial absorber based on single pattern U-shaped resonator

Wang

2017

Appl. Phys. Express

View full text Add to dashboard Cite

A novel quad-band terahertz metamaterial absorber using four different modes of single pattern resonator is demonstrated. Four obvious frequencies with near-perfect absorption are realized. Near-field distributions of the four modes are provided to reveal the physical picture of the multiple-band absorption. Unlike most previous quad-band absorbers that typically require four or more patterns, the designed absorber has only one resonant structure, which is simpler than previous works. The presented quad-band absorber has potential applications in biological sensing, medical imaging, and material detection.

show abstract

Calculations of a wideband metamaterial absorber using equivalent medium theory

Cited by 27 publications

References 29 publications

Fabrication and characterization of resistive double square loop arrays for ultra-wide bandwidth microwave absorption

Fabrication and characterization of resistive double square loop arrays for ultra-wide bandwidth microwave absorption

Controlled Defect Based Ultra Broadband Full-sized Metamaterial Absorber

Novel quad-band terahertz metamaterial absorber based on single pattern U-shaped resonator

Contact Info

Product

Resources

About