Investigation of patterns of antenna arrays with circular polarization

The derivation of the correlations for calculation of pattern of antenna arrays or sub-arrays with ring-like arrangement of elements is shown. The example of the calculation of pattern and ellipticity factor of ring-like antenna array with symmetrical vibrators over the conducting screen having twelve branches, being fed with the progressive phase shift is considered. It is shown that along the axis of array circular polarization is provided, and patterns and ellipticity factor of array in planes, perpendicular to axis of array with different location angles are isotropic.