Physical principles of plasma antenna operation

Gusein-zade, N. G.; Minaev, I. M.; Rukhadze, A. A.; Rukhadze, K. Z.

doi:10.1134/s1064226911100111

Cited by 16 publications

(4 citation statements)

References 4 publications

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“…For the metal antenna, the efficiency is still close to unity even at the radius 5 mm and metal conductor radius of 2-3 mm is usually used and for conventional plasma antenna wih dielectric tube-its radius is about 10 mm. 3,20 Fig. 5 shows that for high performance of antenna, it is necessary to provide sufficient radius of antenna for the case of femtosecond laser-induced channel antenna, saying that at least a radius of 10 mm is expected to be used.…”

Section: -5mentioning

confidence: 99%

“…However, if plasma frequency is not so high and is comparable to collisional frequency of plasma, then the absorption is not so serious and therefore the volume plasma wave could be excited. 20 On the other hand, the RF wave of sufficiently high power can lead to electron heating and affect the collision frequency, and thus, the plasma channel conductivity and lifetime favorably. 10 According to the review work of Moisan and Zakrzewskit, 22 an estimate of minimum input wave power to sustain a surface-wave discharge under subatmospheric pressure P min ¼ pa 2 hn D =2aðn D Þ can be used as a reference, where a is plasma radius, h-power lost by an average electron in collisions of all kinds, n D -the density at the end of the column, and aðn D Þ-wave attenuation coefficient, respectively.…”

Section: Physics Of Laser-induced Plasma Channel Antennamentioning

confidence: 99%

“…In this case, the real part of plasma permittivity is negative, and hence, electromagnetic wave is not allowed to propagate in plasma and the antenna behaves like a metal with respect to the operating signal waves. 20,21 When the plasma frequency is very high, the imaginary part of permittivity responsible for radiation absorption is very high and therefore only a surface electromagnetic wave propagating along the conductor's surface and damping in the transverse direction can be excited by irradiation. However, if plasma frequency is not so high and is comparable to collisional frequency of plasma, then the absorption is not so serious and therefore the volume plasma wave could be excited.…”

Section: Physics Of Laser-induced Plasma Channel Antennamentioning

confidence: 99%

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Radiation characteristics of femtosecond laser-induced plasma channel Vee antenna

2015

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A virtual reconfigurable plasma Vee antenna consisting of a set of laser plasma filaments produced by femtosecond laser pulses in air is investigated in this paper. The calculation results show that radiation pattern becomes more complex and gain shows initially rapid rise but gradually saturate as the leg length increases, but the pattern and gain are not seriously affected by the plasma conductivity; particularly, the gain of the Vee antenna with plasma conductivity σ = 100S/m can reach about 80% of that of a copper antenna. Radiation efficiency of the antenna has shown a strong dependence on radius of the antenna leg, and an efficiency of 65%, considered to have a proper performance, can be obtained with the channel radius of about 10 mm. Apex angle variation can lead to significant change of the radiation pattern and influence the gain; the best apex angle corresponding to maximal gain and good directivity for the third resonance antenna leg length is found to be at 74° at 600 MHz and σ = 100 S/m. The calculation has shown that at terawatt laser power level, the plasma channel conductivity is close to that of conventional plasma antenna, and peak gain of the Vee antenna is more than 8 dB with a good directivity. In addition, the radiation pattern of special Vee antennas with apex angle 180°-dipole antennas, for first and third resonance leg lengths, is compared and underneath physics of the difference is given. The laser-induced plasma channel antenna is especially suitable for achieving good directivity and gain, which has advantage over conventional plasma antenna with gas discharge tube or metal antenna.

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Section: -5mentioning

confidence: 99%

Section: Physics Of Laser-induced Plasma Channel Antennamentioning

confidence: 99%

Section: Physics Of Laser-induced Plasma Channel Antennamentioning

confidence: 99%

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Radiation characteristics of femtosecond laser-induced plasma channel Vee antenna

2015

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“…Initially, gas ionization in the tube occurs in the electrode region at length r 0 [7]. This process will take place up to densities n e ≥ n cr , at which excitation of the SW starts.…”

Section: B Gas Ionization and The Growth Of The Plasma Columnmentioning

confidence: 99%

Development of the plasma channel of a plasma dipole antenna created by the radiation of a transmitter

Konovalov

Kuzmin

Minaev

et al. 2015

J. Commun. Technol. Electron.

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Characteristics of the plasma layer (a plasma antenna of dipole type), excited by the radiation of a transmitter such as the carrier density distribution over the radius of the dielectric tube (near the boundary) and the growth rate of the plasma region along the tube length are considered. It is shown that it is possible to distinguish such typical dimensions as the radius of the dielectric tube, the radius of the plasma column, and the thickness of the skin layer, and, depending on relationships between these dimensions, consider the influ ence of the transition layer on excitation of the surface wave in the plane or cylindrical symmetry.

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Strong effect of outer plasma layers of femtosecond laser-induced plasma-channel antenna and its metallic counterpart on their radiation

Hong

Choe²

2018

Appl. Phys. B

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Physical principles of plasma antenna operation

Cited by 16 publications

References 4 publications

Radiation characteristics of femtosecond laser-induced plasma channel Vee antenna

Radiation characteristics of femtosecond laser-induced plasma channel Vee antenna

Development of the plasma channel of a plasma dipole antenna created by the radiation of a transmitter

Strong effect of outer plasma layers of femtosecond laser-induced plasma-channel antenna and its metallic counterpart on their radiation

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