A transmit resonator for use in a wireless power transfer system is provided. The transmit resonator includes a core defining an annular groove, a coil element disposed within the annular groove, and a housing surrounding the core and the coil element. The housing includes a casing. and a metal plate, wherein the metal plate is positioned on a side of the transmit resonator that is opposite a receive resonator during operation of the wireless power transfer system, and wherein the metal plate facilitates reducing far-field electromagnetic emissions and improving cooling of the wireless power transfer system.