A New Compact Octagonal Shape Perfect Metamaterial Absorber for Microwave Applications

Hossain, Mohammad Jakir; Faruque, Mohammad Rashed Iqbal; Islam, Mohammad Tariqul; Mat, Kamarulzaman

doi:10.3390/app7121263

Cited by 17 publications

(11 citation statements)

References 24 publications

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“…Metamaterial innovation can be employed to undertake the subject of electromagnetic energy harvesting by viably constructing more productive absorbers. These have on account of they have remarkable properties, for example, negative permeability, left-handed properties, negative refraction and evanescent wave amplification which cannot be found in natural materials [ 2 , 3 ], invisible cloaks [ 4 ], perfect lens [ 5 ], and a perfect absorption [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Perfect metamaterial absorber with high fractional bandwidth for solar energy harvesting

2018

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A new perfect metamaterial absorber (PMA) with high fractional bandwidth (FBW) is examined and verified for solar energy harvesting. Solar cells based on perfect metamaterial give a chance to increase the efficiency of the system by intensifying the solar electromagnetic wave that incident on the device. The designed structure is mostly offered in the visible frequency range so as to exploit the solar’s energy efficiently. Parametric investigations with regard to the measurements of the design structure are fulfilled to characterize the absorber. The finite-difference time-domain (FDTD) method-based CST simulator was used to keep the pattern parameters and absorbance analysis. The metamaterial shows almost 99.96% and 99.60% perfect absorption at 523.84 THz and 674.12 THz resonance frequencies. Moreover, absorption’s FBW is studied, and 39.22% FBW is found. The results confirm that the designed PMA can attain very high absorption peak at two modes such as transverse electric (TE) and transverse magnetic (TM) mode. Other than the numerical outcomes demonstrated that the suggested configuration was also polarization angle insensitive. In addition, the change of absorbance of the structure has provided a new kind of sensor applications in these frequency ranges. Therefore, the suggested metamaterial absorber offers perfect absorption for visible frequency ranges and can be used for renewable solar energy harvesting applications.

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Section: Introductionmentioning

confidence: 99%

Perfect metamaterial absorber with high fractional bandwidth for solar energy harvesting

2018

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“…Table II illustrates the proposed unit cell resonator's comparative view with other reported articles in relevant applications. Most of the authors reported absorption without sensing [31][32][33][34][35][36], whereas the proposed unit cell simultaneously demonstrated the reflection and sensing ability. Therefore, with further precise development and analysis, the resonator cum sensor would be a potential candidate for liquid sensing.…”

Section: Sensing Analysismentioning

confidence: 99%

DNG Metamaterial Reflector Using SOCT Shaped Resonator for Microwave Applications

et al. 2021

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In this paper, the triple reflection band split O circled T (SOCT) shape metamaterial resonator is presented based on the transmission line principle. This paper aims to develop a miniature metamaterial resonator that can simultaneously perform as a reflector and a sensing element in the microwave range. Compare to symmetric and asymmetric structures; the reflection feature is mostly available in a typical resonating structure. The primary motivation beyond the presented work is to achieve high reflection with triple resonance points at 5.8 GHz, 6.37 GHz and 6.57 GHz. The proposed structure achieved Double Negative (DNG) features on this particular resonance with a relative permittivity value ranges -2.17 to -6.62 and relative permeability of -0.73 to -4.15. The scattering parameter performance was verified through simulation and measurement for unit cell and 5x8 array structure. An analytical sensing ability for liquid salinity was performed for potential microwave application, which indicates a potential outcome of the proposed structure in microwave sensing applications.

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“…Therefore, diverse techniques and designs have been proposed to enhance the bandwidths, such as modifying the resonator structure, lumped elements resonators, layered structure, and frequency selective surface (FSS), among others 4 – 7 . High absorption and narrowband responses can clarify some design variations with a closed-ring shape, octagonal shape, resistive-load imposing, and some ring variations 8 , 9 . Unfortunately, higher ohmic loss and bandwidth constraints persist on the suggested unit cell, rendering them unsuitable for microwave applications.…”

Section: Introductionmentioning

confidence: 99%

SNG and DNG meta-absorber with fractional absorption band for sensing application

Hoque

Islam

Almutairi

et al. 2020

Sci Rep

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This paper reports on a tunable transmission frequency characteristics-based metamaterial absorber of an X band sensing application with a fractional bandwidth. Tunable resonator metamaterial absorbers fabricated with dielectric surface have been the subject of growing attention of late. Absorbers possess electromagnetic properties and range modification capacity, and they have yet to be studied in detail. The proposed microstructure resonator inspired absorber with triple fractional band absorption consists of two balanced symmetrical vertical patches at the outer periphery and a tiny drop hole at two edges. Experimental verification depicted two absorption bands with single negative (SNG) characteristics for two resonances, but double negative (DNG) for single resonance frequency. The mechanism of sensing and absorption was analyzed using the transmission line principle with useful parameter analysis. Cotton, a hygroscopic fiber with moisture content, was chosen to characterize the proposed absorber for the X band application. The electrical properties of the cotton changed depending on the moisture absorption level. The simulation and the measured absorption approximately justified the result; the simulated absorption was above 90% (at 10.62, 11.64, and 12.8 GHz), although the steady level was 80%. The moisture content of the cotton (at different levels from 0 to 32.13%) was simulated, and the transmission resonance frequency changed its point in two significant ranges. However, comparing the two adopted measurement method and algorithm applied to the S parameter showed a closer variation between the two resonances (11.64 and 12.8 GHz) which signified that a much more accurate measurement of the cotton dielectric constant was possible up to a moisture content of 16.1%. However, certain unwanted changes were noted at 8.4–8.9 GHz and 10.6–12.4 GHz. The proposed triple-band absorber has potential applications in the X band sensing of moisture in capsules or tablet bottles.

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A New Compact Octagonal Shape Perfect Metamaterial Absorber for Microwave Applications

Cited by 17 publications

References 24 publications

Perfect metamaterial absorber with high fractional bandwidth for solar energy harvesting

Perfect metamaterial absorber with high fractional bandwidth for solar energy harvesting

DNG Metamaterial Reflector Using SOCT Shaped Resonator for Microwave Applications

SNG and DNG meta-absorber with fractional absorption band for sensing application

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