Radiation from a Vertical Dipole with an Inductive Wire-Grid Ground System

摘要

The far field of a vertical electric dipole on a sectionally homogeneous ground plane is considered. The specific model used is a dielectric-like ground which is modified by using an inductive wire grid or mesh screen in a region surrounding the dipole. Attention is focussed on the modification of the radiation pattern resulting from the presence of the inductive ground screen. It is demonstrated that the low-angle radiation may be greatly enhanced by a ground screen which extends out to 15 or more wavelengths. However, some rather curious effects are noted, such as pronounced lobes in the vertical radiation pattern when the reactance of the mesh screen is of the order of 0.1 times the characteristic impedance of free space. (Author)