Interference synthesis of cross beams from sparse array

Based on principle of power synthesis of sparse array, mathematical model of spatial power combining is established. Relation between cross angle of beams and synthesis efficiency on aimed point from two antenna nodes is derived. Furthermore, the setting principle of sampling interval is analyzed for simulation experiment. Energy distributions of the useful points under different cross angles were simulated. Simulation shows that if distance between the antenna nodes and aimed point are equal, and frequency, polarization and antenna type are the same, synthesis efficiency relies on the cross angles of beams, shape and density on the useful points accumulation area also rely on the cross angles of beams.