scholarly journals Design of a perfect and multi-resonant metamaterial absorber for electromagnetic energy harvesting applications

2021 ◽  
Vol 2118 (1) ◽  
pp. 012005
Author(s):  
F Umaña-Idarraga ◽  
D Cataño-Ochoa ◽  
S Montoya-Villada ◽  
C Valencia-Balvin ◽  
E Reyes-Vera
Keyword(s):  
Split Ring Resonator ◽  
Metamaterial Absorber ◽  
Electromagnetic Energy ◽  
Negative Permittivity ◽  
Electrical Performance ◽  
Electromagnetic Properties ◽  
Perfect Absorber ◽  
Total Size ◽  
Resonator Structure ◽  
Electromagnetic Energy Harvesting

Abstract In this work, a perfect absorber based on a split ring resonator structure is proposed and numerically analyzed. The software CST STUDIO was employed to carry out the numerical analysis and the optimization of the proposed structure. The electromagnetic properties of the proposed metamaterial cell were analyzed in the first phase of this study demonstrating that such structure resonates at 2.4 GHz and 4.2 GHz simultaneously. In fact, this structure has negative permittivity and permeability in these two bands. The optimization process has led us to obtain a compact resonator, which has a total size of 15 mm × 15 mm. Subsequently, the capacity of this structure as an absorber of electromagnetic energy is analyzed. The obtained results reveal that this structure has absorption efficiencies of 98.2% and 99.7% for the first and second bands respectively. Also, other characteristic parameters were evaluated. This shows that the proposed structure has a high electrical performance and can be used for the collection of electromagnetic energy, which can be used to power wireless sensor networks.

A Design Procedure for Electric Inductive Capacitive Resonators with Negative Permittivity

2013 ◽  
Vol 448-453 ◽  
pp. 2199-2202
Author(s):  
Shi Wei Zhou ◽  
Yi Min Xie ◽  
Qing Li ◽  
Xiao Dong Huang
Keyword(s):  
Ring Resonator ◽  
Design Procedure ◽  
Computational Design ◽  
Split Ring Resonator ◽  
Index Of Refraction ◽  
Negative Permittivity ◽  
Electromagnetic Properties ◽  
Optimization Approach ◽  
Split Ring ◽  
Negative Index Of Refraction

Permittivity signifies a key component to metamaterial which can achieve negative index of refraction, but it has not been sufficiently addressed in computational design. This paper aims to attain negative permittivity through a topology optimization approach and provides an example equivalent to electric inductive-capacitive resonator. Similar to split ring resonator, this locally self-contained (without the demand for inter-cell connection) resonator allows keeping bulk electromagnetic properties homogeneously, facilitating mass fabrication, and realizing single sampling test.

scholarly journals Polarization insensitive symmetrical structured double negative (DNG) metamaterial absorber for Ku-band sensing applications

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Mohammad Lutful Hakim ◽  
Touhidul Alam ◽  
Mohamed S. Soliman ◽  
Norsuzlin Mohd Sahar ◽  
Mohd Hafiz Baharuddin ◽  
...  
Keyword(s):  
Sound Absorption ◽  
Metamaterial Absorber ◽  
Negative Permittivity ◽  
Perfect Absorber ◽  
Underwater Sound ◽  
Absorption Frequency ◽  
Frequency Bands ◽  
Sensing Applications ◽  
Mode Tem ◽  
Ku Band

AbstractMetamaterial absorber (MMA) is now attracting significant interest due to its attractive applications, such as thermal detection, sound absorption, detection for explosive, military radar, wavelength detector, underwater sound absorption, and various sensor applications that are the vital part of the internet of things. This article proposes a modified square split ring resonator MMA for Ku-band sensing application, where the metamaterial structure is designed on FR-4 substrate material with a dielectric constant of 4.3 and loss tangent of 0.025. Perfect absorption is realized at 14.62 GHz and 16.30 GHz frequency bands, where peak absorption is about 99.99% for both frequency bands. The proposed structure shows 70% of the average absorption bandwidth of 420 MHz (14.42–14.84 GHz) and 480 MHz (16.06–16.54 GHz). The metamaterial property of the proposed structure is investigated for transverse electromagnetic mode (TEM) and achieved negative permittivity, permeability, and refractive index property for each absorption frequency band at 0°, 45°, and 90° polarization angles. Interference theory is also investigated to verify the absorption properties. Moreover, the permittivity sensor application is investigated to verify the sensor performance of the proposed structure. Finally, a comparison with recent works is performed, which shows that the proposed MMA can be a good candidate for Ku-band perfect absorber and sensing applications.

scholarly journals A Compact Metamaterial based Dual-Band Antenna with Improved Gain for WLAN Applications

2021 ◽  
Vol 9 (VI) ◽  
pp. 2778-2783
Author(s):  
Pendli Pradeep
Keyword(s):  
Ground Plane ◽  
Cost Effective ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Electromagnetic Properties ◽  
Impedance Bandwidth ◽  
Compact Antenna ◽  
Resonator Structure ◽  
Dual Band Antenna ◽  
Compact Size

In this paper, a compact metamaterial inspired dual band antenna is proposed for WLAN and WiMAX applications. The antenna consists of Square Split Ring Resonator structure with a defected ground plane and slots to enhance the bandwidth and gain parameters. Metamaterial based Microstrip patch antenna produces unique electromagnetic properties that allows us to control over the antenna parameters with a compact size. FR-4 epoxy is used as substrate its dielectric constant is 4.4 and loss tangent is 0.02. Dimensions of the antenna are 20 x 12 x 1.6mm3 with very compact size and cost effective. The proposed metamaterial based antenna resonates at dual bands at 5.13GHz and 5.53 GHz with impedance bandwidth of (|S11|<-10 dB) 4.96-5.26 GHz (300MHz) and 5.34-5.69 GHz (350MHz) respectively. The peak gains at resonant frequencies 5.13 GHz and 5.53 GHz are 1.61 dB and 1.62dB respectively. The proposed metamaterial based compact antenna can effectively work for WLAN and WiMAX application.

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