Synthesis of Sparse Near-Field Focusing Antenna Arrays Based on Bayesian Compressive Sensing

A mathematical model for near-field sparse array antennas synthesis is established in this work for the first time. An algorithm based on the multi-task compressive sensing method is employed to obtain the element position and excitation coefficient fitting a desired near-field radiation pattern. Numerical results validate the effectiveness of the proposed method to synthesize different types of desired patterns with more than 30% of elements saved compared with uniformly spaced array.