Synthesis of Maximum Beam Efficiency Irregular Antenna Arrays for Wireless Power Transmission

The synthesis of maximum beam collection efficiency (BCE) irregular transmitting antenna arrays for microwave wireless power transmission (MWPT) is fulfilled by using iterative convex approximation in this paper. By adopting irregular subarray technique, the number of radio frequency (RF) chain can be greatly reduced while suppressing high sidelobes level. For a fixed subarray tiling configuration, the problem of maximum BCE satisfying peak SLL constraint is actually a non-convex constrained Rayleigh entropy maximization problem with respect to subarray complex excitations, which can be efficiently solved by iterative convex approximation algorithm. The numerical results are provided to verify the effectiveness of the proposed method.