Synthesis of nonuniform elliptical antenna arrays based on subarray division

A synthesis method of sparse elliptical antenna arrays based on subarray division is introduced. The antenna array is divided into several subarrays to reduce design complexity and cost. Through strict mathematical derivation, the spacing of adjacent elements, array size, total element number, and the element number of each subarray are constrained simultaneously. To reduce the peak sidelobe level (PSLL) while constrain the first null beamwidth (FNBW) of the radiation pattern, the element positions, excitation of each subarray, and the element number of each subarray are optimized. Simulation results demonstrate effective sidelobe suppression. Compared with other literature, lower PSLL can be obtained under the constraint of FNBW, which shows the effectiveness of the proposed method. Also, full-wave electromagnetic simulation is carried out by CST using a half-wave dipole antenna.