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Measurements have been made of the amplitude and phase distributions of the current on monopoles of various lengths (Â¿0/4 < h < 11/2Â¿0) embedded in a large volume of hot plasma. The change in the current distributions was observed as the ratio of the plasma frequency (Â¿p) to the antenna frequency (Â¿) was varied. When Â¿p < Â¿, the plasma behaves like a dielectric with a relative permittivity Â¿r=1Â¿Â¿p2/Â¿2. The electrical length of the antenna is shortened as the plasma density is increased. At Â¿p Â¿ Â¿, the antenna becomes electrically very small, and the antenna current tends to show a triangular distribution. When Â¿p > Â¿, the antenna-current distribution undergoes an anomalous change. An oscillating nature in the amplitude distribution and the reversal of phase change in the phase distribution are observed.