volume | PIER Journals

Abstract

To improve beam collection efficiency (BCE) while suppressing sidelobes and limiting implementation complexity in microwave wireless power transmission (MWPT) transmitting arrays with a small number of subarrays, this paper proposes an axially symmetric sparse planar array (SDASPA) model and a one-step subarray-division algorithm named RT-DWCFPSO-SD. The proposed model exploits axial symmetry to reduce search dimension and facilitate a simplified feeding structure. The proposed algorithm jointly optimizes element positions, element excitations, and subarray boundary parameters by combining a constriction factor, dynamic inertia weight, and ring topology. Numerical simulations on an 8 × 8 array with an aperture of 4.5λ × 4.5λ show that, when the array is divided into three subarrays, the proposed method achieves a BCE of 93.42% and a CSL of -13.19 dB. These results indicate that the proposed method is a promising design tool for MWPT transmitting arrays under limited subarray-division conditions.

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Mr. Jie Wang

Professor Jianxiong Li