Some properties of planar array antennas formed by symmetry rotation of linear array antenna

The author presents the analysis of some special cases of finite-element antenna arrays such as V-array, double-V array, and multiple-ring array. The derivation of the far-field array factor and electric field are given for each case. Some important properties such as the half-power beamwidth, the beamwidth between first nulls (or minimum), and the side-lobe level are given. As an illustrative example, the author considers the case of a 64-element multiple-ring planar array.<>