Towards antenna miniaturization at radio frequencies using plasma discharges

An original electrically small antenna concept relying on plasma discharges is presented in this paper. It consists of a small coaxial probe placed above a ground plane and surrounded by a hemispherical inductively coupled plasma discharge. This plasma discharge behaves as a subwavelength epsilon-ne...

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Bibliographic Details
Published in:Physics of plasmas 2019-03, Vol.26 (3)
Main Authors: Laquerbe, Vincent, Pascaud, Romain, Laffont, Adrien, Callegari, Thierry, Liard, Laurent, Pascal, Olivier
Format: Article
Language:English
Subjects:
Antennas
Electromagnetism
Engineering Sciences
Ground plane
Impedance matching
Inductively coupled plasma
Microwave frequencies
Miniaturization
Plasma
Plasma jets
Plasma physics
Plasmas
Radio frequency
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Summary:An original electrically small antenna concept relying on plasma discharges is presented in this paper. It consists of a small coaxial probe placed above a ground plane and surrounded by a hemispherical inductively coupled plasma discharge. This plasma discharge behaves as a subwavelength epsilon-negative resonator exhibiting a localized surface plasmon resonance at microwave frequencies with significant radiation efficiency. Measurements show that the plasma allows impedance matching of the radiating element and frequency agility from 310 to 390 MHz by controlling the power delivered to the discharge. Meanwhile, significant radiation enhancement up to 20 dB at 300 MHz is measured. The existence of the localized surface plasmon resonance is finally confirmed by a Mie analysis considering the measured plasma characteristics.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.5087070