Spatial distribution of the amplitude of electromagnetic waves in the near zone of linear and flat antenna arrays

Abstract

The amplitudes and phases of the electric field in the near zone of the linear and planar equidistant antenna arrays of a large electrical length on the basis of a radiating coaxial-slit cable, that are designed to provide reliable radio communication in the underground tunnels and at the railway transport, are calculated. It is shown that such antenna arrays have shaped a searchlight beam in the near zone upon condition that three or four linear radiating cables have radiated.