Beam-Forming and Beam-Steering Capabilities of a Reconfigurable Plasma Antenna Array

Olvera, Anuar de Jesus Fernandez; Melazzi, Davide; Lancellotti, V.

doi:10.2528/pierc16031506

Cited by 13 publications

(5 citation statements)

References 21 publications

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“…The plasma permittivity can be modulated by adjusting the discharge parameters, such as operating pressure, working gas, driving frequency and activated current [12][13][14]. This allows the radiation pattern of plasma antenna to be reconfigured and thus presents the capability of beam scanning [15,16]. It is reported that the reconfigurable plasma corner reflector antenna possesses specific beam shapes with high gain that are electrically switchable from one to another [17,18].…”

Section: Introductionmentioning

confidence: 99%

Plasma-enabled microwave modulation for continuous beam scanning

Ye¹,

Wang²,

Yao³

et al. 2022

J. Phys. D: Appl. Phys.

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The continuous beam scanning capability is a key characteristic of the reconfigurable antenna in wireless communication. In this work, we theoretically imply that the plasma columns are capable of smoothly manipulating the transmission of the electromagnetic waves. And then we propose a plasma-based microwave modulation method for obtaining a high precision beam scanning over 360 degrees on the azimuthal plane by tailoring the operating currents in 22-tube plasma window antenna system. Through this simple current modulation approach, a continuous beam scanning is achieved at the reconfiguration time of 0.6 ms without any detriment to the lobe shape.

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Section: Introductionmentioning

confidence: 99%

Plasma-enabled microwave modulation for continuous beam scanning

Ye¹,

Wang²,

Yao³

et al. 2022

J. Phys. D: Appl. Phys.

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“…The radiation pattern of the plasma antenna can be effectively manipulated by altering the complex dielectric constant of the plasma, which depends on the plasma density and collision frequency [6][7][8][9]. The typical trait of this antenna is that it can realize the reconfigurability of the plasma antenna by rapidly electrically switching the plasma on and off in a timescale as small as microseconds [10][11][12]. Plasma antennas do not scatter electromagnetic waves in the non-excited state, which allows plasma antenna to be applied in radar stealth.…”

Section: Introductionmentioning

confidence: 99%

“…This frequency response characteristic can be exploited to analysis multi-frequency coupling situations when the antennas are closely stacked [16]. All the features and advantages mentioned above make the plasma antenna more and more attractive as a new reconfigurable radio frequency device for beam-steering radar applications and communications [5,12,17].…”

Section: Introductionmentioning

confidence: 99%

Radiation pattern in a tunable plasma window antenna

Ye¹,

Wang²,

Yao³

et al. 2022

J. Phys. D: Appl. Phys.

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The work aims to theoretically and experimentally investigate the radiation characteristics of the plasma window antenna for beam-steering applications. The antenna system consists of a wire antenna in the center, surrounded by a circular array of 22 cylindrical plasma columns. The research reveals that the radiation pattern of the antenna system can be simply controlled by exploiting the variable parameters, such as working frequency, driving current, and plasma configurations. It implies that the beam narrows as the plasma antenna aperture decreases, implying a greater directivity. By electrically tuning the plasma, a maximum directivity of 9.09 dBi and a minimum half-power beam width of 35.86° emerged for a specific configuration. The results exhibit that higher currents prevent radiation from escaping from the plasma shell, while higher frequency microwaves are more likely to penetrate the plasma blanket.

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“…The process to aggregate the weighted signals after multiplying with required weight of individual antenna elements to produce a beam of electromagnetic energy to any desired direction rather than in all directions is known as beamforming [2]. The radiation pattern of a smart antenna can be shaped with different structures of the overall array [3].…”

Section: Introductionmentioning

confidence: 99%

Variable Diagonal Loading Based Robust Concentric Hexagonal Antenna Array With Low Side Lobe Level Using Tapering Windows

Ali¹,

Hossain²,

Reza³

2020

PIER C

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In this paper, the performance of a concentric hexagonal antenna array (CHAA) is investigated with the exploitation of a robust variable diagonal loading (VDL) technique in the presence of direction of arrival (DOA) mismatch. The performance of minimum variance distortionless response (MVDR) based CHAA is compared with the performance of existing MVDR based concentric circular antenna arrays (CCAAs), and it is found that the proposed MVDR based CHAA provides 25.54% narrow half-power beamwidth (HPBW) and lower side lobe level than the existing MVDR based CCAA. When DOA mismatch occurs between main beam steering direction and actual signal-of-interest (SOI) direction, the performance of MVDR based CHAA is deteriorated. In the case of DOA mismatch, to ameliorate the performance of CHAA, this paper proposes VDL technique for the CHAA processor and compares the performance of the proposed robust CHAA with the existing robust CHAAs. The proposed VDL based robust CHAA delivers 88.37% and 78.56% higher output power for 2 • DOA mismatch than existing fixed diagonal loading (FDL) and optimal diagonal loading (ODL) based CHAAs, respectively. Several tapering window functions are proposed to reduce the side lobe level of CHAA. Performance of the proposed beamformer is analyzed utilizing MATLAB environment in various scenarios.

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Beam-Forming and Beam-Steering Capabilities of a Reconfigurable Plasma Antenna Array

Cited by 13 publications

References 21 publications

Plasma-enabled microwave modulation for continuous beam scanning

Plasma-enabled microwave modulation for continuous beam scanning

Radiation pattern in a tunable plasma window antenna

Variable Diagonal Loading Based Robust Concentric Hexagonal Antenna Array With Low Side Lobe Level Using Tapering Windows

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