scholarly journals Planar Dual Polarized Metasurface Array for Microwave Energy Harvesting

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1985
Author(s):  
Maged A. Aldhaeebi ◽  
Thamer S. Almoneef
Keyword(s):  
Energy Harvesting ◽  
Dielectric Substrate ◽  
Metamaterial Absorber ◽  
Absorption Efficiency ◽  
Unit Cell ◽  
Resistive Load ◽  
Electromagnetic Energy Harvesting ◽  
Absorbed Power ◽  
Simulation Results ◽  
Dual Polarized

The design of a dual polarized metasurface collector based on the metamaterial full absorption concept for electromagnetic energy harvesting is introduced. Unlike previous metamaterial absorber designs, here the power absorbed is mostly dissipated across a resistive load rather than within the dielectric substrate. This is achieved by channeling the absorbed power to an optimal resistive load through a via hole. The simulation results show that a power absorption efficiency of 98% is achieved at an operating frequency of 2 GHz for a single unit cell. A super unit cell consisting of four cells with alternating vias was also designed to produce a dual polarized metasurface. The simulation results yielded a radiation to AC efficiency of around 98% for each polarization.

scholarly journals Independently Tunable Multipurpose Absorber with Single Layer of Metal-Graphene Metamaterials

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 284
Author(s):  
Chen Han ◽  
Renbin Zhong ◽  
Zekun Liang ◽  
Long Yang ◽  
Zheng Fang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Fermi Level ◽  
Potential Application ◽  
Single Layer ◽  
Wide Band ◽  
Metamaterial Absorber ◽  
Unit Cell ◽  
Perfect Absorption ◽  
Solar Energy Harvesting ◽  
Band Absorption

This paper reports an independently tunable graphene-based metamaterial absorber (GMA) designed by etching two cascaded resonators with dissimilar sizes in the unit cell. Two perfect absorption peaks were obtained at 6.94 and 10.68 μm with simple single-layer metal-graphene metamaterials; the peaks show absorption values higher than 99%. The mechanism of absorption was analyzed theoretically. The independent tunability of the metamaterial absorber (MA) was realized by varying the Fermi level of graphene under a set of resonators. Furthermore, multi-band and wide-band absorption were observed by the proposed structure upon increasing the number of resonators and resizing them in the unit cell. The obtained results demonstrate the multipurpose performance of this type of absorber and indicate its potential application in diverse applications, such as solar energy harvesting and thermal absorbing.

Electromagnetic energy harvesting and density sensor application based on perfect metamaterial absorber

2016 ◽  
Vol 30 (20) ◽  
pp. 1650133 ◽  
Author(s):  
Mehmet Bakir ◽  
Muharrem Karaaslan ◽  
Furkan Dincer ◽  
Oguzhan Akgol ◽  
Cumali Sabah
Keyword(s):  
Energy Harvesting ◽  
Resonance Frequency ◽  
Microwave Frequency ◽  
Metamaterial Absorber ◽  
Suggested Model ◽  
Sensor Application ◽  
Sensing Applications ◽  
Frequency Regime ◽  
Electromagnetic Energy Harvesting ◽  
Perfect Metamaterial Absorber

The proposed study presents an electromagnetic (EM) energy harvesting and density sensor application based on a perfect metamaterial absorber (MA) in microwave frequency regime. In order to verify the absorption behavior of the structure, its absorption behavior is experimentally tested along with the energy harvesting and sensing abilities. The absorption value is experimentally found 0.9 at the resonance frequency of 4.75 GHz. In order to harvest the EM energy, chips resistors are used. In addition, the suggested model is analyzed for its dependency on polarization angles. The results show that the perfect MA can be easily and efficiently used for EM energy harvesting applications. Moreover, as an additional feature of the model, we also realized a density sensor application. It can be seen that this structure can be used as a multi-functional device and configured for many other sensing applications.

scholarly journals A Broadband Metamaterial Absorber

2019 ◽  
Vol 8 (6S4) ◽  
pp. 116-118
Keyword(s):  
Ground Plane ◽  
Dielectric Substrate ◽  
Metamaterial Absorber ◽  
Unit Cell ◽  
Five Dimensions

This paper gives structure and standard execution of a broadband metamaterial protect at microwave frequencies.The unit cell of proposed structure combines of set-rectangular structure patches of copper put diagonally,at the most noteworthy purpose of the FR4 dielectric substrate and a steady ground plane of copper. The proposed shape demonstrates the broadband response of a maintenance exchange speed of two.7 GHz with more than 90 five% absorptivity degree starting from 6.nine GHz to nine.6 GHz.It shows wideband ingestion upto forty five dimensions scene edges underneath underhanded recurrence for each TE and TM polarizations.

scholarly journals UHF Metamaterial Absorber with Small-Size Unit Cell by Combining Fractal and Coupling Lines

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Shicheng Fan ◽  
Yaoliang Song
Keyword(s):  
Design Principle ◽  
Metal Structure ◽  
Resonance Wavelength ◽  
Dielectric Substrate ◽  
Metamaterial Absorber ◽  
Unit Cell ◽  
Absorption Mechanism ◽  
Small Unit ◽  
Small Ratio ◽  
Surface Metal

We present a perfect UHF metamaterial absorber by combining coupling lines and fractal lines with a very small unit cell. The proposed absorber consists of a surface metal structure and metallic background plane, separated by a dielectric substrate and air. Simulation results show that the absorber has an absorption peak at 442 MHz with 99.73% absorptivity. The ratio between a lattice constant and resonance wavelength is 1/68, significantly less than the existing absorber. The design principle is introduced in detail according to the absorption mechanism of the proposed absorber. Moreover, the absorption peaks remain high with large angles of incidence for both TE and TM polarizations. Due to the small ratio, it can be widely used in radiation suppression for microwave relay communication such as mobile communication and wireless network by changing the parameters of the structure.

scholarly journals Circularly polarize antenna array for electromagnetic energy harvesting

2018 ◽  
Vol 7 (2.29) ◽  
pp. 1
Author(s):  
Chia Chao Kang ◽  
Chia Yang Kang
Keyword(s):  
Energy Harvesting ◽  
Antenna Array ◽  
Electromagnetic Energy ◽  
Spiral Inductor ◽  
Single Element ◽  
Spiral Antenna ◽  
Feed Line ◽  
Electromagnetic Energy Harvesting ◽  
Simulation Results ◽  
Microstrip Feed

Electromagnetic energy harvesting from ambient sources have been presented more than 50 years. In this paper, electromagnetic energy harvesting by using circular polarize antenna array is presented. The proposed antenna is having 2 similar size of spiral inductor that feed by microstrip feed line. The gain, momentum visualization were investigated. The circular polarize antenna are fabricated on Roger 4003 substrates. Based on the observations, it is expected that the gain obtained by the antenna array is higher than the single element antenna. The simulation results show that 3.22 dBi gain can be achieved for single spiral antenna whereas the antenna array can achieved as high as 5.14dBi at frequency 527MHz. The work concluded that investigations of electromagnetic energy harvesting antenna array is successful. 

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