Antenna gain enhancement by using metamaterial radome at THz band with reconfigurable characteristics based on graphene load

Seyedsharbaty, Mir Mohsen; Sadeghzadeh, R. A.

doi:10.1007/s11082-017-1052-1

Cited by 79 publications

(23 citation statements)

References 38 publications

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“…Dispersion diagram is usually used to explain changes in parameters with frequency. 39 Two commonly used methods for analysis and obtaining the electromagnetic parameters of metamaterial structures, permittivity, and permeability, include Nicolson-Rose 40,41 and reflection/transmission. 42 However, numerical modeling has been considered for the basic model of the metamaterials.…”

Section: Metamaterials Modelingmentioning

confidence: 99%

Metamaterial loads used in microstrip antenna for circular polarization: Review

Zarrabi

Pirooj

Pedram

2019

Int J RF Microw Comput Aided Eng

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The metamaterial elements and structures have been noticed for obtaining circular polarization (CP) while developing various procedures. In this paper, we have mentioned some of these cases and compared the metamaterial loads effect on antenna current distribution. We have classified them into four categories. The first case covers patch antenna based on composite right/left‐handed method, where the metamaterial has been used for changing the current distribution in the loop form. The second case has been achieved by radome and metasurface. In the third model, the interaction between feed and metamaterial load has been considered and the last case has been made by the metamaterial load with truncated structure. The metamaterial loading has been modeled based on Nicolson‐Ross or transmission/reflection techniques for extracting the permittivity and permeability. While the microstrip slot antennas are attractive for wider bandwidth, the truncated structure can change the current for achieving CP. Here, we have studied the antenna for wireless and WiMAX applications.

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Section: Metamaterials Modelingmentioning

confidence: 99%

Metamaterial loads used in microstrip antenna for circular polarization: Review

Zarrabi

Pirooj

Pedram

2019

Int J RF Microw Comput Aided Eng

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“…The main advantage of using graphene in antenna design is the efficient dynamic tuning [15,16]. Frequency dependent surface conductivity of graphene can be tuned by changing its chemical potential which is realized by adjusting a bias or gate voltage.…”

Section: Graphene Materialsmentioning

confidence: 99%

“…Since the discovery of this novel 2-D material, a variety of antenna types are studied based on graphene covering microwave to THz frequency range [15][16][17][18][19]. Although investigation of graphene based TSA still remains an unexplored area of research in the literature, some wideband and UWB antennas based on graphene have been designed and analyzed from different point of views recently.…”

mentioning

confidence: 99%

“…Specially, in the terahertz regime, the use of graphene in antenna design has attracted a wide research interest. For example, the benefit of reconfigurable graphene characteristics has been utilized in [15] to design an inset feed patch antenna for THz band application. The simulation results confirm that the antenna gain can be enhanced by incorporating a metamaterial layer and increasing the chemical potential of graphene.…”

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confidence: 99%

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Development of Graphene Based Tapered Slot Antennas for Ultra-Wideband Applications

Inum¹,

Rana²,

Shushama³

2017

PIER C

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Abstract-In this paper, three different types of graphene based tapered slot antennas are designed for ultra-wideband (UWB) applications. The taper profiles for three antenna types are linear, exponential, and constant width. A single layer graphene sheet of 35 µm thickness is used to model the radiating element and feeding structure of the designed antennas. To feed the antennas, microstrip to slotline transition technique is adopted. An approximate analytical theory based on conical transmission line model is considered to authenticate the design of graphene based tapered slot antennas. Better impedance matching over 2-20 GHz is obtained by designing a balun in the form of a radial stub. Return loss, bandwidth, radiation pattern, and directive gain are the considered antenna performance parameters. Time domain solver of CST MWS software is used to evaluate the performances of linearly tapered slot antenna (LTSA), exponentially tapered slot antenna (Vivaldi), and constant width slot antenna (CWSA). The results obtained from CST are compared with that from HFSS to further validate the design. Simulation results with extensive parametric study confirm that the novel 2-D material graphene can be considered as a promising one to model UWB tapered slot antennas. Furthermore, the effectiveness of designed graphene based tapered slot antennas is revealed by comparing their performances with other existing UWB antennas. Moreover, as a UWB application, Vivaldi antenna shows promising results in microwave brain tumor detection.

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“…Another factor limiting the widespread use of THz technology is high attenuation path loss in the THz spectrum . As a solution to attenuation problem, researchers have investigated several high‐gain antenna structures such as Yagi‐Uda, log‐periodic, bow tie, on‐chip antenna, microelectromechanical systems antenna, metamaterial‐based antennas, substrate‐integrated wave guide antennas, leaky wave antenna, lens antenna, and wideband horn antenna . All the above discussed geometries had three‐dimensional complex and large geometries.…”

Section: Introductionmentioning

confidence: 99%

Ultrawideband elliptical microstrip antenna for terahertz applications

Singhal

2019

Micro & Optical Tech Letters

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An elliptical microstrip antenna for ultrawideband applications in terahertz (THz) frequency range is proposed. It comprises a microstrip feedline and a partial rectangular ground plane. It has an operating bandwidth of 0.46‐5.46 THz and a peak realized gain of 12 dB. It is simulated by using both high‐frequency structure simulator (HFSS) and Computer Simulation Technology Microwave Studio (CST MWS) simulators. It has distorted omnidirectional radiation patterns across the entire band of operation.

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Antenna gain enhancement by using metamaterial radome at THz band with reconfigurable characteristics based on graphene load

Cited by 79 publications

References 38 publications

Metamaterial loads used in microstrip antenna for circular polarization: Review

Metamaterial loads used in microstrip antenna for circular polarization: Review

Development of Graphene Based Tapered Slot Antennas for Ultra-Wideband Applications

Ultrawideband elliptical microstrip antenna for terahertz applications

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