Transmission-Conversion Efficiency Maximization Technique for MIMO Wireless Power Transfer Systems in ISAC Applications

This paper presents a DC power optimization methodology for MIMO Wireless Power Transfer (WPT) systems especially for Integrated Sensing and Communications (ISAC) applications. Given a rectifier that has already been optimized itself, the Transmission–Conversion Efficiency (TCE) is optimized by jointly considering both RF–RF (air propagation) and RF–DC (rectifier) stages. In a specific MIMO WPT configuration with a 16×16 transmitter array (TXA) and an 8×8 receiver array (RXA), simulation result showed a significant 65.6% TCE improvement over conventional RF-to-RF Power Transfer Efficiency (PTE) optimization. It can offer a boundary for future real-time WPT algorithms.