Some Studies of Asymmetric Dipole Antenna with Arbitrarily Displaced Feed-points Immersed in Weakly Ionized Plasma

234-239A theoretical study of radiation of electromagnetic and electroacoustic waves from an asymmetric dipole antenna with arbitrarily displaced feed-points immersed in an infinite, lossy, compressible, weakly-ionized plasma bas been made. It is shown that the propagation is almost unaffected by plasma when source frequencies much higher than the plasma frequency are used. However, if the source of radiation is operated at frequencies lower than the plasma frequency, the plasma medium is found to have its profound effect on the radiation. General expressions for the far-field radiation pattern are developed for both electromagnetic and electroacoustic modes. The arbitrarily displaced system has been studied under three different configurations, namely, the arbitrary di8placement, transverse displacement and the axial displacement for various values of feed-point displacement (2R/λ). Theoretical radiation patterns for the above mentioned configurations have been obtained for the source frequency much greater than the plasma frequency for the electromagnetic mode