Design and Anylasis of Capacitively Loaded two Ω Shaped DGS Resonators for Dual Band Wireless Power Transfer (DB-WPT) Systems

In this paper, a dual band wireless power transfer (DB-WPT) system is presented using $\Omega$-shape defected ground structures (DGSs) loaded with surface mounted capacitors (SMDs). The simulated efficiencies are 79.4% at 0.27 GHz, and 97.9 parcent 0.88 GHz, respectively. a DB-WPT system is generated from two DBSF. The WPT system works at 0.27 and 0.88 GHz with a separation distance of 8mm. Each the Tx and the Rx has a size of 20 mm × 20mm.