期刊
IET MICROWAVES ANTENNAS & PROPAGATION
卷 12, 期 15, 页码 2301-2306出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-map.2018.5178
关键词
reflector antennas; omnidirectional antennas; plasma devices; array signal processing; antenna radiation patterns; UHF antennas; dipole antenna arrays; planar antenna arrays; numerical analysis; beamforming capabilities; plasma circular reflector antenna; gaseous plasma antenna array; metallic radiating elements; metallic antennas; antenna radiation pattern; plasma parameter tuning; reconfigurable PAA; central metallic half-wavelength dipole; cylindrical plasma discharges; reflection coefficient; H-plane; gain pattern; central intrinsically omnidirectional antenna; angular steering resolution; planar circular lattice; frequency 1; 45 GHz; pressure 2 mbar
资金
- Italian Space Agency [2015-030-I.0]
A gaseous plasma antenna array (PAA) is an aggregate of plasma discharges and possibly conventional metallic radiating elements, and it constitutes a promising alternative to metallic antennas for applications in which fast reconfiguration of radiation pattern, and gain is desired; such properties can be achieved by exploiting the electronic switch on/off condition of plasma discharges, and tuning of the plasma parameters. Here, the authors present a reconfigurable PAA that features a central metallic half-wavelength dipole working around 1.45GHz, surrounded by a planar circular lattice of cylindrical plasma discharges. Customised plasma discharges have been realised, and filled with argon gas at 2mbar so as to have a complete control on the plasma discharge properties (e.g. plasma frequency, collisional frequency). The magnitude of the reflection coefficient, and the gain pattern on the H-plane have been investigated numerically and experimentally; numerical and experimental results exhibit a good agreement and show that the central intrinsically omnidirectional antenna can provide simple beamforming capabilities upon turning on a subset of plasma discharges; as these plasma discharges are turned on, the authors have observed a maximum gain of similar to 15 degrees.
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