Graphene-Based Composite Right/Left-Handed Leaky-Wave Antenna at Terahertz

Gao, Muzhi; Li, Kang; Kong, Fanmin; Zhuang, Huawei; Zhu, Gaoyang

doi:10.1007/s11468-020-01130-w

Cited by 15 publications

(5 citation statements)

References 15 publications

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“…The diversity gain is defined as the time-averaged difference between signal-to-noise ratio combined within diversity antenna system and its corresponding single antenna system within single diversity of the channel. The parameter DG can be evaluated in terms of maximum theoretical diversity gain (10 dB) and envelope correlation coefficient by using equation (8) reported in [42]. The higher value of diversity gain means better isolation between the patch elements of the MIMO antenna.…”

Section: Diversity Gain (Dg)mentioning

confidence: 99%

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A micro-scaled graphene-based tree-shaped wideband printed MIMO antenna for terahertz applications

Babu¹,

Das

Varshney³

et al. 2022

J Comput Electron

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A tree-shaped graphene based microstrip MIMO antenna for terahertz applications is proposed.The proposed MIMO antenna is designed on a 600×300 μm 2 polyimide substrate. The designed MIMO antenna exhibits a wide impedance bandwidth of 88.14% (0.276 -0.711 THz) due to the suggested modifications in the antenna configuration. The MIMO design parameters like total active reflection coefficient (TARC), mean effective gain (MEG), envelope correlation coefficient (ECC) and diversity gain (DG), Channel capacity loss (CCL) are evaluated and their values are found within acceptable limits. The proposed MIMO structure offers MEG ≤ −3.0 dB, TARC≤ -10.0 dB, DG≈ 10 dB, CCL < 0.5 bps/Hz/sec and ECC < 0.01 at the resonant frequency. At the resonant frequency, the isolation between the radiating elements of the proposed MIMO is recorded as −52 dB. The variations in operating frequency and S-parameters are also analyzed as a function of the chemical potential (μc) of the graphene material.The parametric analysis, structural design evolution steps, surface current distribution, antenna characteristics parameters and diversity parameters are discussed in detail in this paper. The designed MIMO antenna is suitable for high speed short distance communication, video rate imaging, biomedical imaging, sensing, and security scanning in the THz frequency band.

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Section: Diversity Gain (Dg)mentioning

confidence: 99%

“…So, the compact efficient THz antennas are in high demand for the radiation and detection of THz waves. Significant contributions have been reported by investigating the advantageous properties of conducting materials like gold [7] and graphene [8][9][10][11] for designing highly efficient THz antennas.…”

Section: Introductionmentioning

confidence: 99%

A micro-scaled graphene-based tree-shaped wideband printed MIMO antenna for terahertz applications

Babu¹,

Das

Varshney³

et al. 2022

J Comput Electron

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“…For THz communication systems, the antenna topologies offered are a good option for UWB applications because of their outstanding return loss characteristics and the need for continuous radiation. [23]…”

Section: Introductionmentioning

confidence: 99%

Graphene based rectangular microstrip patch antenna for UWB applications

Asha,

Shanthy,

Krishna Kumari

2023

J. Phys.: Conf. Ser.

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According to the findings of the article, researchers looked at graphene-based hexagonal microstrip patch antennas. In place of a U-shaped slot and an elliptical slot, an ellipse-shaped slot was cut into the surface of the hexagonal radiators that were used in the designs that were recommended. This helped to improve the radiation performance of the radiators. A frequency known as ultra-wideband (UWB) is used in the modelling process for the anticipated structures. Through the use of comparative studies, an investigation into the effect of U-shaped and elliptical-shaped slots on the radiation performance of proposed graphene antenna designs has been carried out. The use of ellipsoidal slot-loaded structures results in considerable enhancements and advancements in directivity. The impedance bandwidths for S11 antennas with a gain of 10 dB range from 0.68 to 1.63 terahertz for U-shaped and elliptical-shaped slot loaded hexagonal printed antennas, respectively. Extensive research is presented for the various characteristics of the proposed THz antenna types. The designs that were offered provide excellent impedance matching over the full operating range. This is made possible by the high reflection and VSWR values that they possess. The cutting-edge antenna design may be used for spectrum imaging, the detection of explosives, medical diagnostics, radio transmission, and the monitoring of the weather.

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“…Recently, the terahertz band has been emersed in different applications such as high data rate transmission in IoT applications [7], biomedical applications [8,9], material characterizations [10], and high-speed secure data transmission [11]. Numerous antennas have been developed for terahertz spectrum uses, including the Leaky-Wave antenna [12], Yagi-Uda antenna [13,14], Bow-Tie antenna [15], Monopole Antenna [16], and log-periodic antenna [17]. The planar microstrip patch antenna possesses numerous advantages over the other types due to the low cost of manufacturing, low profile, simple structure, and Monolithic Microwave Integrated Circuit (MMIC) compatibility.…”

Section: Introductionmentioning

confidence: 99%

MTM-Inspired Graphene-Based THz MIMO Antenna Configurations Using Characteristic Mode Analysis for 6G/IoT Applications

et al. 2022

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6G wireless communications will be immersed in the future with different applications. It is expected to support all IoT services and satellite communications, and it is expected to support artificial intelligence (AI) and machine learning (ML). The THz frequency band has a vital role in 6G communication. In this study, a new graphene plasmonic two-port Terahertz (THz) MIMO antenna is analyzed by the characteristic mode theory (CMA), which gives a better insight into the physical behavior of the MIMO configurations. The proposed MIMO antenna is compact and designed on a Teflon substrate of 130 × 85 µm2. The antenna provides a wide impedance bandwidth of 0.6 THz (3.2–3.8 THz). The CMA is applied to clarify the position at which the mutual coupling gives a maximum concentrated current distribution. It is mainly used to reveal the preferable MIMO antenna configuration by the usage of the model significant and model current distribution property. To reduce the mutual coupling between the radiating elements, a complementary dumbbell-structure Metamaterial (MTM) unit cell is etched in the ground plane to block the coupling mode without any affection on the dominant mode. The preferred MIMO configuration gives high isolation of −55 dB between the radiating patches. The fundamental characteristics have been discussed in detail. The proposed MIMO design offers several attractive features such as large bandwidth of 0.6 THz, low envelope correlation coefficient (ECC) of 0.000168, compact size, stable radiation, high gain of 7.23 dB, and low channel capacity loss (CCL) of 0.006. The proposed MIMO design is suitable for different applications in the THz band according to the high-performance parameters such as biomedical applications, security scanning, sensing, IoT, and 6G high-speed wireless communication systems.

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Graphene-Based Composite Right/Left-Handed Leaky-Wave Antenna at Terahertz

Cited by 15 publications

References 15 publications

A micro-scaled graphene-based tree-shaped wideband printed MIMO antenna for terahertz applications

A micro-scaled graphene-based tree-shaped wideband printed MIMO antenna for terahertz applications

Graphene based rectangular microstrip patch antenna for UWB applications

MTM-Inspired Graphene-Based THz MIMO Antenna Configurations Using Characteristic Mode Analysis for 6G/IoT Applications

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