A New Transmitting Antenna System For Very Low Radio Frequencies

摘要

The theoretical antenna problem is solved using a normal mode expansion of the current distribution. A matrix method is developed to compute the current distribution of a thin, linear antenna loaded with lumped-circuit elements. The series is found to converge relatively fast. A digital computer is used to solve the matrix equations. Results are obtained for a full-wave linear antenna symmetrically loaded with real impedances Zo, one half-wavelength apart. Current distributions, feedpoint impedances, radiation patterns, etc., are presented as func¬tions of Zo Results of the idealized problem are applied to the power line antenna. The matrix method can also be extended to the general linear antenna with any type of loading or feeding.nSystem components and performance of the Dinkey Creek power-line antenna are described. The problem of interference with nearby audio frequency communication systems is examined.