A Reconfigurable Monopole Antenna With Fluorescent Tubes Using Plasma Windowing Concepts for 4.9-GHz Application

Ja’afar, Hajar; Ali, Mohd Tarmizi; Dagang, Ahmad Nazri; Zali, Hanisah Mohd; Halili, Nur Aina

doi:10.1109/tps.2015.2398878

Cited by 41 publications

(11 citation statements)

References 16 publications

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“…Finally, we mention that the convergence pattern of Z with N C for n e ∈ {10 19 , 10 20 } m -3 is similar to the ones of Figs. 3(a) and 3(b).…”

Section: Solution With Mom and Convergence With Eigencurrentssupporting

confidence: 76%

“…Finally, we have investigated the behaviour of the gain function for different values of the plasma density n e ; though, we only report results for the configuration "plasma window 5." At higher densities n e ∈ {10 19 , 10 20 } m -3 , the plasma frequency ω pe and the collision frequency ν e increase (Section 2.3) and hence the discharges tend to behave ever more similarly to a lossy conducting medium at the operational frequency f = 2.27 GHz. As a consequence, the screening and guiding effects of the active discharges become more pronounced.…”

Section: Antenna Gain and Radiation Patternmentioning

confidence: 99%

“…In addition to the advantages of baseline GPAs, PAAs can afford multi-beam operation, beam-steering, and better directivity. Also, an array of plasma discharges surrounding a radiating element -which can be either metallic or a GPA -effectively realizes a "plasma blanket" of sorts that can be used to shield unwanted incoming EM waves or to open "windows" in suitable positions so as to let outward EM waves through [19,20]. In such configurations, the control of the RP and the beam is based upon the state (on or off) of the discharges and the plasma properties thereof as well as the interaction between the plasma window and the incident EM wave.…”

Section: Introductionmentioning

confidence: 99%

“…Lastly, circular and square arrangements of discharges were experimentally investigated in [19] and [20], respectively. In either paper, the Authors considered a single tier of off-the-shelf fluorescent lamps surrounding a quarter-wavelength monopole on a ground plane.…”

Section: Introductionmentioning

confidence: 99%

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

Olvera¹,

Melazzi²,

Lancellotti³

2016

PIER C

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Abstract-We present the numerical parametric study of a reconfigurable plasma antenna array (PAA) composed of a metallic half-wavelength dipole and a set of cylindrical plasma discharges arranged in a planar square lattice. Our results, obtained with the linear embedding via Green's operators (LEGO) method, indicate that beam-forming and beam-steering functionality can be achieved and controlled by appropriately choosing the number and position of the active plasma discharges around the dipole. Furthermore, we show that an external static magnetic field and the plasma density have a noticeable effect on the radiation pattern of the antenna.

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“…Finally, we mention that the convergence pattern of Z with N C for n e ∈ {10 19 , 10 20 } m -3 is similar to the ones of Figs. 3(a) and 3(b).…”

Section: Solution With Mom and Convergence With Eigencurrentssupporting

confidence: 76%

Section: Antenna Gain and Radiation Patternmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Olvera¹,

Melazzi²,

Lancellotti³

2016

PIER C

View full text Add to dashboard Cite

show abstract

“…The plasma frequency is based on the electron number density, and collision frequency is related to the electron temperature, those obtained from Glomac programming. From the calculation, the values of plasma frequency and collision frequency were obtained and used as input parameters in CST software for plasma antenna [7][8].…”

Section: Plasma Parameters Calculationmentioning

confidence: 99%

Multi-Function Adjustable Antenna using Plasma Radiation for Weather Monitoring

Dagang¹,

Sha’ari²,

Umar³

et al. 2019

IJRTE

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Plasma is the fourth state of matter. It is a common state of matter where almost of the universe in a plasma state and it can be found on earth naturally or artificially. The advantages of using plasma antenna are it is invisible to radar, no ringing effect, more efficient, dynamically reconfigurable and has fast transmission. The aim for this study is to investigate the effect of winds and humidity on radio signal using plasma antenna as an alternative to the conventional metal antenna. This research used two different type of commercial fluorescent lamps which are tubular (cylinder) and 2U-shape as plasma antenna. Thus, this kind of antenna can be considered as multi-function as it is originally a light source. The plasma antenna parameters such as return loss, gain and radiation pattern were characterized. In order to realize that, plasma parameters i.e., plasma and collision frequencies need to be obtained. The electrical properties measurement need to be done to record the values of current and voltage, then were used in GLOMAC programming to calculate the plasma parameters. The next stage was the simulation of plasma antenna using CST software. The last stage is signal strength experiment to get the value for radio signal strength received by plasma antenna. Then, the value of radio signal strength in against time was recorded. From the results, as the wind speed over time decreases, the power level decreases and vice versa. From the simulation results, the radiation pattern for tubular and 2U can be categorized as omni-directional pattern. Generally, good correlation was accomplished to prove the wind speed and humidity effect on radio signal using plasma antenna.

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Exploring the connection between non‐uniform electrostatic fields generated by opposite polarity voltages and the behavior of atmospheric pressure plasma jet

Yu,

Wu,

Chen

et al. 2024

Contrib. Plasma Phys

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This study investigates the counterintuitive behaviors of a microwave‐induced atmospheric pressure plasma jet (APPJ) under the influence of an external electrostatic field applied by one or a pair of parallel electrode plates subjected to DC voltages. The findings demonstrate that the plasma jet consistently deflects toward the electrode plate with an electrostatic potential, irrespective of the direction of the applied field. The deflection becomes more pronounced with increasing voltage on the electrode plate until the ionic wind generated by the high voltage significantly affects the jet's behavior. Remarkably, a negative voltage induces a greater deflection compared to a positive voltage. To further investigate this discovery, the dielectric properties and the non‐neutral characteristics of the APPJ are analyzed, and the simulations of the electric field distribution reveal a non‐uniform distribution, which plays a crucial role in understanding the mechanism behind the observed behaviors of the plasma jet. This study provides a comprehensive understanding of the underlying mechanism driving the observed phenomena and sheds light on the collective behavior of plasma jets under non‐uniform electric fields. The findings of this study offer valuable guidelines for investigating and controlling the behavior of APPJs.

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A Reconfigurable Monopole Antenna With Fluorescent Tubes Using Plasma Windowing Concepts for 4.9-GHz Application

Cited by 41 publications

References 16 publications

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

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

Multi-Function Adjustable Antenna using Plasma Radiation for Weather Monitoring

Exploring the connection between non‐uniform electrostatic fields generated by opposite polarity voltages and the behavior of atmospheric pressure plasma jet

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