Wide-range robust wireless power transfer using heterogeneously coupled and flippable neutrals in parity-time symmetry

• DOI: 10.1126/sciadv.abo4610
• Publication Date: 2022-06-15T17:53:55Z
• Authors: Hyunwoo Kim; Seungwon Yoo; Hyunwoo Joo; Jongheon Lee; Donggeun An; Seonghyeon Nam; Hyungu Han; Dae-Hyeong Kim; Sanghoek Kim
• Keywords: Wireless Power Transfer; Parity (physics)

Recently, stationary wireless power transfer (WPT) has been widely adopted in commercial devices. However, the current WPT configuration is limited its operational area and susceptible to operating condition changes, impeding applications for dynamic environments. To overcome limitations, we propose a system with laterally aligned neutral elements parity-time (PT) symmetry, which can widen number of neutrals N . Compared conventional multiple-input–single-output WPT, dimension complexity substantially reduced from R × C N+ 1 because amplitudes are simply controlled by coupling capacitors. The frequency automatically adjusted real eigenvalue PT-symmetric achieve high voltage gain efficiency, making robust. performance calculated coupled-mode theory was experimentally verified rigid flexible types receivers, confirming potential both industrial biomedical electronics.