Maximization of Mutual Reaction Between Two Conformal Phased Arrays of Antennas to Enhance Power Transfer in Radiating Near-Field Region

Abstract

In paper, wireless power transfer (WPT) between two paired transmitting and receiving antenna arrays (TXAA and RXAA, respectively) is studied for high transferring efficiency when they are in the radiating near-field region of each other. The reaction between them is studied by examining a power reaction factor (PRF) to achieve a maximum magnitude as a design target. In contrast to conventional near-field focus (NFF) TXAA design to maximize illumination power strength in a designated narrow zone, this work results in conformal phase and amplitude matches between the TXAA and RXAA radiations. In study, an elemental PRF matrix is first built and then decomposed by singular-value decomposition (SVD) to produce excitations of orthogonal beams for the TXAA and RXAA radiations. The reaction between paired orthogonal beams of TXAA and RXAA is examined to result in optimum weighting coefficients, where the elemental excitations of TXAA and RXAA are subsequently found. In this paper, the theoretical concept is first introduced. Numerical simulations, as well as full-wave simulation, are shown to validate the feasibility of this optimization concept.