Cylindrical Omnidirectional Slotted Waveguide Antenna with optimized directional characteristics

Harmouch, Ali; Haddad, Hassan

doi:10.1109/mms.2013.6663131

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…Slotted waveguide antennas have been studied in the literature for many years The simulated radiation gain of the helicone antenna for different cases. [53][54][55][56][57][58][59]. A number of papers [60][61][62][63][64] have proposed plasma-filled waveguides for mode modification or as protection against high-power electromagnetic waves.…”

Section: Reconfigurable Slotted Cylindrical Waveguide and Coaxial Arr...mentioning

confidence: 99%

Reconfigurable Antennas Based on Plasma Reflectors and Cylindrical Slotted Waveguide

Sadeghikia¹,

Horestani²,

Himdi³

2023

Plasma Science - Recent Advances, New Perspectives and Applications

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In this chapter, we focus on the application of plasma structures to realize reconfigurable antennas. Several approaches are presented to dynamically control the beamwidth and radiation gain of circularly polarized helical antennas based on plasma reflectors. Ideas and design principles were discussed and confirmed by full-wave simulations and measurements of realized prototypes. It is shown that plasma reflectors can be effectively used to design reconfigurable helicone antennas with controllable gain and beamwidth. The chapter also presents a reconfigurable slotted antenna using a plasma tube inside the metallic waveguide. It is shown that the radiation pattern of the antenna can be readily reconfigured by changing the state of the plasma column. In short, it is shown that in contrast to conventional methods based on electronic or mechanical devices, reconfigurable antennas based on plasma media benefit from simple and relatively low-cost structures as well as high performance.

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Section: Reconfigurable Slotted Cylindrical Waveguide and Coaxial Arr...mentioning

confidence: 99%

Reconfigurable Antennas Based on Plasma Reflectors and Cylindrical Slotted Waveguide

Sadeghikia¹,

Horestani²,

Himdi³

2023

Plasma Science - Recent Advances, New Perspectives and Applications

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“…Meshkov and Abarzhi theoretically and experimentally studied the RT flows by focusing of the effect of acceleration on disorder and order in RT mixing [54]. Wang and Zhao mathematically investigated the RTI in the presence of a bounded uniform gravitational field based on Oldroyd-B model inside a compressible viscoelastic fluid [55]. Su uses a sign-changing Taylor sign coefficients for proving the existence of water waves via the method that strong Taylor sign holds in starting time while breaks down at a later time and vice versa [56].…”

Section: Review Of the Current Statusmentioning

confidence: 99%

“…Slotted waveguide antennas have been studied in the literature for many years [53][54][55][56][57][58][59]. A number of papers [60][61][62][63][64] have proposed plasma-filled waveguides for mode modification or as protection against high-power electromagnetic waves.…”

Section: Reconfigurable Slotted Cylindrical Waveguide and Coaxial Arr...mentioning

confidence: 99%

“…Similarly, a few works have been established [52][53][54][55] on the solution of the damped KdV equation in various plasma systems using the classical fluid approach of plasma physics. The application of plasma particles is observed under the effect of nonextensive electron distributions in astrophysical and cosmological scenarios [56], plasma dynamics [57], nonlinear gravitational model [58], and Hamiltonian systems [59] in the presence of long-range interaction.…”

Section: Introductionmentioning

confidence: 99%

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Plasma Science - Recent Advances, New Perspectives and Applications

2023

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The presence of plasma density gradient is one of the main sources of Rayleigh-Taylor instability (RTI). The Rayleigh-Taylor instability has application in meteorology to explain cloud formations and in astrophysics to explain finger formation. It has wide applications in the inertial confinement fusion to determine the yield of the reaction. The aim of the chapter is to discuss the current status of the research related to RTI. The current research related to RTI has been reviewed, and general dispersion relation has been derived under the thermal motion of electron. The perturbed densities of ions and electrons are determined using two fluid approach under the small amplitude of oscillations. The dispersion equation is derived with the help of Poisson's equation and solved numerically to investigate the effect of various parameters on the growth rate and real frequency. It has been shown that the real frequency increases with plasma density gradient, electron temperature and the wavenumber, but magnetic field has opposite effect on it. On the other hand, the growth rate of instability increases with magnetic field and density gradient, but it decreases with electron temperature and wave number.

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“…The main purpose of this research is to select the best positioning and design for the slots of the circular slotted waveguide antenna to provide an omni direc tional radiation pattern, high directivity, minimum side lobes and compact sizein comparison with other already existing antennas in market, in order for the antenna to be suitable for Wireless Internet applica tions at the 2.4 GHz frequency [5,6]. The first step started with observing and comparing antennas that can be found in the market for these applications.…”

Section: Problem Statementmentioning

confidence: 99%

Miniaturized high-gain omnidirectional cylindrical slotted waveguide antenna

Harmouch

Haddad

Ziade

et al. 2015

J. Commun. Technol. Electron.

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Antennas are becoming crucial in an increasingly growing number of vital applications, particu larly with the emergence of the 3G and 4G generations of communications. Point to multipoint configura tion is a major interest nowadays; therefore antennas are designed for this purpose where efficiency, size, and cost play a decisive role.The common practice is to refer to the already existing antennas in the market for this sole purpose. Nonetheless, a major drawback of such solutions is that the aforementioned criteria are extremely hard to simultaneously optimize. The purpose of this project is to present a new configuration rely ing on the use of Slotted Circular Waveguide Antennas, which are initially used in Radar applications, as an ultimate alternative that allows drastically enhancing the ratio of performance versus cost. Moreover, the antenna will be remodeled and designed to function as an enhanced Circular Slotted Waveguide Antenna with optimized directional characteristics with gain above 10 dBi (to be considered as high gain). Simulation results were carried out at 2.4 GHz frequency and indubitably demonstrated high effectiveness in terms of directivity and high gain given a reduced cost, shape and size. A prototype was fabricated to measure its parameters and compare them with simulation results. It is still noteworthy to mention that these results matched with an elevated accuracy since the pattern simulated is meshed and modeled to a far extent taking into account all non ideal characteristics.

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Cylindrical Omnidirectional Slotted Waveguide Antenna with optimized directional characteristics

Cited by 6 publications

References 3 publications

Reconfigurable Antennas Based on Plasma Reflectors and Cylindrical Slotted Waveguide

Reconfigurable Antennas Based on Plasma Reflectors and Cylindrical Slotted Waveguide

Plasma Science - Recent Advances, New Perspectives and Applications

Miniaturized high-gain omnidirectional cylindrical slotted waveguide antenna

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