Abstract
In this paper, a noteworthy compact dual band wireless power
transfer (DB-WPT) system is presented and studied. This system is
proposed using interdigital capacitor which reduced the size of the
whole system and accomplished high efficiencies. An interdigital
capacitor is printed in the ground plane of the design and loaded with a
chip capacitor to produce dual bands. The operation of the system is
verified by fabricating the proposed DB-WPT system, which shows measured
coupling efficiencies of 96 % and 98.8 % at 0.53 and 1.1 GHz,
respectively at a transfer space of 12 mm. The fabricated structure has
dimensions of 13.5 mm × 20 mm. The results show good agreement between
the circuit model and the measurements. The idea of this design makes it
applicable for compact near field WPT applications.
