Engineering Physics Annotation << Back Plasma Antenna With Adjustable Length Minaev I.M., Tikhonevich O.V. Ensuring electromagnetic compatibility, controlling the radiation pattern, controlling the effective dispersion area of antennas, etc. can be achieved by controlling the geometric parameters of the antennas. This possibility arises if plasma is used as a current-carrying element. A distinctive feature of plasma antennas is the ability to change the length of the plasma region (plasma column) when the transmitter radiation power changes. If we imagine Keywords: plasma antenna; plasma column; standing wave ratio; plasma frequency; surface wave. DOI: 10.25791/infi zik.12.2023.1372 the plasma region as a complex load of the generator-plasma antenna power line, then by measuring the standing wave ratio (SWR) in the line, we can determine the radiation resistance, losses and reactance and, accordingly, the plasma density (ne ) in the plasma column. An estimate of the value (ne ) allows us to judge the possibility of using a plasma column as a plasma antenna. The work examines the possibility of creating effi cient emitters whose length can be controlled. Pp. 21-27.