Graphene‐based directive optical leaky wave antenna

Patel, Shobhit K.; Sorathiya, Vishal; Guo, Tianjing; Argyropoulos, Christos

doi:10.1002/mop.31538

Cited by 21 publications

(9 citation statements)

References 12 publications

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“…To realize enhanced reflection coefficient, transmission coefficient, and gain, a graphene-based optical LWA is designed in. 24 To reduce the period length of the unit cell, LWAs based on microstrip rampart lines 25,26 and meandering slots 27,28 are investigated. In, 27,28 the composite right/left-handed (CRLH) transmission properties are obtained due to the meandering slots and thus the antennas can scan from backward to forward.…”

Section: Introductionmentioning

confidence: 99%

“…In, 22,23 microstrip patches are utilized as the radiating elements to realize wide‐range beam scanning. To realize enhanced reflection coefficient, transmission coefficient, and gain, a graphene‐based optical LWA is designed in 24 . To reduce the period length of the unit cell, LWAs based on microstrip rampart lines 25,26 and meandering slots 27,28 are investigated.…”

Section: Introductionmentioning

confidence: 99%

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A periodic meandering microstrip line leaky‐wave antenna with consistent gain and wide‐angle beam scanning

Wang

Sun

Xue

2022

Int J RF Mic Comp-Aid Eng

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In this article, a periodic leaky‐wave antenna (LWA) with wide‐angle beam scanning and stable gain is proposed based on the meandering microstrip line. Due to the meandering property of the microstrip line, the longitudinal dimension of the antenna is reduced. Firstly, the radiation characteristic of the meandering microstrip line is analyzed in detail. Each corner of the meandering microstrip line is modeled by a shunt capacitance and shunt radiation conductance to acquire the equivalent circuit. Then, the frequency balanced condition is investigated based on the established equivalent circuit to realize continuous beam scanning through broadside. Subsequently, the method of open‐stop band (OSB) suppression is studied by introducing asymmetric perturbation on the LWA unit cell, which actually can be applied to eliminate the OSB effect in arbitrary symmetric LWAs. Finally, an antenna prototype is simulated and measured. The measured results agree well with the simulated results, validating the proposed method of OSB suppression. The measured results show that the designed antenna exhibits the beam scanning capacity of −47° to +76° with the frequency varying from 5.0 to 7.8 GHz and gain variation of 2.9 dB.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A periodic meandering microstrip line leaky‐wave antenna with consistent gain and wide‐angle beam scanning

Wang

Sun

Xue

2022

Int J RF Mic Comp-Aid Eng

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“…5G millimeter-wave bands use frequency bands in the 24-100 GHz range [8][9][10][11][12], which can support many devices [13][14][15][16] and demonstrate the performance of outlining 5G service requirements [17,18]. Leaky-wave antennas (LWAs) are highly promising directional antennas for millimeter and submillimeter waves [19][20][21] because they can achieve higher directive radiation [22][23][24] with single or multiple feedings [25,26], resulting in a compact structure [27] with low energy consumption [28,29]. Numerous studies have discussed the functionality of resonant cavities by using the LWA principle [30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

A Promising Ka Band Leaky-Wave Antenna Based on a Periodic Structure of Non-Identical Irregularities

Shaaban

Ali

Yasseen

et al. 2022

Preprint

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This paper presents a new periodic grooved dielectric leaky-wave antenna (LWA) with non-identical irregularities for an extremely high-frequency (EHF) range capable of performing efficiently in the Ka band through a stable gain, a decrease in the level of the side lobes, and the achievement of a narrower main lobe beam. It consists of a dielectric waveguide antenna placed inside a channeled rectangular metallic waveguide to improve performance. A dielectric rod was used to overcome the losses related to the propagation of electromagnetic waves in metal conductors. A grooved dielectric of a 21-element linear array is used to propose a simple approach for the synthesis of such antennas based on a modified energy method and is fed by a standard waveguide. It was designed and simulated at 37.2 GHz for satellite, 5G antennas, and radar applications. The major novelty of this study is the ability to control the direction of the main lobe through non-identical irregularities in geometric parameters, such as the width, height, and distance between each element. Radiation techniques have been studied extensively using simulations. A performance antenna with radiation efficiency 99.35%, gain 22 dBi, width of radiation pattern 3.2 ◦ , and side lobe level (SLL) -18.3 dB has been achieved.

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“…Due to its high thermal, electrical, and optical properties, graphene is very popular [6]. Graphene is also commonly used in the construction of many reconfigurable devices such as gratings [7], tunable absorbers [8], [9], polarizers [2], leaky-wave antennas [10], etc. It can be reconfigured by adjusting different physical characteristics such as chemical potential, temperature, frequency, and dispersion rate [11].…”

Section: Introductionmentioning

confidence: 99%

Graphene-based tunable broadband polarizer for infrared frequency

Sorathiya

Patel

2021

Preprint

Self Cite

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This paper proposes the tunable graphene-assisted polarizer structure which is working on the infrared frequency range. The tunable polarizer has been designed by a three-layered structure of silica, graphene, and gold. The polarizer behavior of the structure is analyzed for the frequency range of 3 to 12 THz. The tunability of the structure is analyzed for the different values of fermi energy which is tunable parameter of single-layer graphene sheet. Polarizer response is derived in terms of different performance parameters such as reflectance, phase variation, phase difference, polarization conversion rate, and effective refractive indices. Graphene-based polarizer structure is investigated for the co-polarization and cross-polarization input incident conditions to check linear to circular polarization conversion. It also shows an effective refractive index response to check the metasurface behavior of the polarizer for 3 to 12 THz range. We have observed that the polarization amplitude becomes stronger for the higher Fermi energy value of the graphene sheet. The reflection amplitude is achieved up to 90%. Results of the proposed polarizer structure can be used to design the various electro-optical structure which operates in the lower THz range.

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Graphene‐based directive optical leaky wave antenna

Cited by 21 publications

References 12 publications

A periodic meandering microstrip line leaky‐wave antenna with consistent gain and wide‐angle beam scanning

A periodic meandering microstrip line leaky‐wave antenna with consistent gain and wide‐angle beam scanning

A Promising Ka Band Leaky-Wave Antenna Based on a Periodic Structure of Non-Identical Irregularities

Graphene-based tunable broadband polarizer for infrared frequency

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