The excitation of electroacoustic waves by antennas in the ionosphere

Abstract

Measurements of the impedance at 7.75 Mc/s of an electrically short antenna in the ionosphere indicate that power is absorbed by some mechanism other than electromagnetic radiation. The importance of the radiation of energy as an electron pressure (electroacoustic) wave generated near the antenna is discussed, and it is shown that the calculated power radiated by this mechanism yields results in good agreement with the observations.