Compact Near Field Wireless Energy Transfer Systems Using Defected Ground Structures

Near-Field Wireless Power Transfer systems have attracted attention for their potential applications, such as implanted medical devices, radio frequency identification, and portable electronic devices in general. In this context, a compact model short-range NF-WPT operating ISM bands is proposed, employing the concept of ground plane aperture resonators or Defected Ground Structures (DGS). This technique allows miniaturization resonator, which leads to development systems. The proposed work aims at possible applications that require simultaneous energy data transfer. operates dual band 433 MHz 900 makes use overlapping circular DGS order shrink resonator device obtain high values Figure Merit (FoM) commonly used research area. was designed using electromagnetic analysis built Rogers RO4003 dielectric material. dual-band total area 11.7 × 10.2 mm $^{2}$ when placed distance 15 between transmitter receiver, they measured FoM 0.71 1.07 440 918 MHz, respectively. results were compared with related works found literature, indicate notation="LaTeX">$\eta _{WPT}$ 40.9% 49.2 %.