A Two Element Plasma Antenna Array

Sadeghikia, Fatemeh; Hodjat-Kashani, F.

doi:10.48084/etasr.319

Cited by 12 publications

(2 citation statements)

References 19 publications

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“…The length of each CFL is 18 cm from the circular ground and the diameter of each CFL column is 14.7 mm, while a 1.6 mm space gap is between the columns. So, to form the truncated conical reflector, 19 CFLs are arranged at the bottom face of the cone. The angle between the ground plane and each CFL is 45 o .…”

Section: Plasma Helicone Antenna Based On the U-shaped Compact Fluore...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: Plasma Helicone Antenna Based On the U-shaped Compact Fluore...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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“…Plasma antennas are expected to be widely used in military, civil and aviation applications, including for EM wave stealth, radome, and information coupling [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental characteristics of 2.45 GHz microwave reconfigurable plasma antennas

Zhao¹,

Sun²,

Ren³

et al. 2019

J. Phys. D: Appl. Phys.

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The work described in this article was performed with the aim of introducing a flexible plasma antenna excited by a 2.45 GHz magnetron power supply. The antenna system is made of a flexible discharge tube, which can be arranged in different shapes. The properties of the antennas were determined by varying the plasma parameters and the shapes of the antenna. The results show that characteristics such as the resistance, reactance, directionality and radiation pattern can be easily and rapidly regulated by varying not only the discharge parameters but also the antenna shapes. Moreover, the range of plasma parameters in the 2.45 GHz plasma antenna system is larger than when driven by kHz and MHz power supplies. Hence, the reconfigurability of the antenna is superior. For example, the 2.45 GHz monopole antenna can be transformed into a planar antenna for reflecting electromagnetic waves.

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Theoretical and experimental investigations of surface-waves plasma column and microwave plasma source for applications in reconfigurable plasma antenna

Abbasi

Asadi

2017

Microw. Opt. Technol. Lett.

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In this paper, we have investigated plasma column excited by surface-waves using monopole plasma antenna. Since the plasma frequency has an important role in conductivity of the plasma column and antenna radiation characteristics, determining the distribution electron density and plasma frequency in the inhomogeneous plasma column axis is particularly important. For this purpose, the plasma column is modelled by fluid equations for high-frequency discharges. Because of significant advantages such as high power handling capability at 2.45 GHz, the surfaguide launcher is chosen from the other conventional launchers to propagate the surface wave along plasma column. The surfaguide is experimentally excited an argon gas-filled tube at a pressure of 0.2 torr as a surface-wave plasma source. In this work, because of safety considerations about high power radiation, plasma frequency measurements was impractical using conventional methods. Therefore, a new system is designed consists of a solid-state VCO, amplifier, circulator, attenuator and two double-ridged horn antennas. The plasma frequency is obtained close to 5.7 GHz, which is consistent with theoretical concepts.

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A Two Element Plasma Antenna Array

Cited by 12 publications

References 19 publications

Reconfigurable Antennas Based on Plasma Reflectors and Cylindrical Slotted Waveguide

Reconfigurable Antennas Based on Plasma Reflectors and Cylindrical Slotted Waveguide

Experimental characteristics of 2.45 GHz microwave reconfigurable plasma antennas

Theoretical and experimental investigations of surface-waves plasma column and microwave plasma source for applications in reconfigurable plasma antenna

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