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Plasma offers a promising alternative to metal for a wide variety of radiofrequency antenna applications. ¦ In this letter we report measurements of efficiencies up to 50% and radiation patterns for § plasma column antenna elements. It is demonstrated that the current distribution along the antenna ¦ can be controlled by the plasma density. Plasma columns can be used instead of metal elements in communications antennas.doi:10.1063/1.123317 fatcat:gj53x2fqunachi6jm3cz7zkpvm