Formation of the Electric Field Strength Maximum at a Given Point in Space by a Focused Linear Antenna Array

The possibility of forming the maximum electric field strength value at a given point in space using a focused one-dimensional linear antenna array is considered. It is shown that the location of the maximum electric field strength does not coincide with the point of in-phase addition of electromagnetic waves emitted by the elements of the antenna array - the focusing point. The dependence of the shift of the maximum electric field strength on the focus point for various focal lengths and sizes of antenna arrays is presented. It has been established that the value of the miss in the focusing coordinates is determined only by the size of the antenna array and does not depend on the number of its elements. The paper presents theoretical assumptions, which were confirmed by mathematical calculations. To confirm the results obtained, a number of different antenna configurations were calculated. Antenna configurations had different numbers of radiating elements and different distances between the radiating elements of the antenna array.