Conductivity and noise problem of plasma antennas
Investigation the plasma antenna on the basis of UHF discharge near the second Langmuir resonance (subresonance) is continuing. Measurements are given on the admission of signals. It is provied reducing the thermal and fluctuation noise of UHF discharge compared with metal.
Plasma antennas based on UHF discharge
Studied are the antenna properties of the UHF discharge plasma at the threshold of the resonance of the electron Langmuir frequency with the pump second harmonic. The results of experimental measurements of some characteristics of a plasma antenna-amplifier at the LF range are shown. A mathematical model of a similar antenna, which allows proceeding to a physical model of the distributed parametric amplifier, is built.
Reconfigurable Plasma Antennas
This paper reviews recent work and applications of plasma antennas. Plasma antennas use partially or fully ionized gas instead of metal as the conducting medium to create an antenna. The advantages of plasma antennas are that they are highly reconfigurable and can be turned on and off. The radiated wave profile can be calculated by several numerical methods. The disadvantage is that plasma antennas require energy to be ionized. Hence, research to reduce the power required to ionize the gas at various plasma densities is important.