RESONATOR, AND RADIO POWER FEEDING SYSTEM

PROBLEM TO BE SOLVED: To provide a radio power feeding system which can achieve miniaturization and suppression of heat evolution in a resonator while maintaining excellent transmission efficiency when transmitting power between paired resonators by using a magnetic field resonance system.SOLUTION: Resonators 30 are used in a radio power feeding system for transmitting power on the basis of the magnetic field resonance method, and each resonator 30 is configured of a resonance coil (winding coil) 32 and a support member (support base) 31 for supporting the resonance coil 32. The resonance coil 32 converts AC power with a predetermined resonance frequency into electromagnetic field energy and vice versa. The support member 31 includes dielectric ceramic material as a main component. With this, dielectric loss and conductor loss can be suppressed when the paired resonators 30 are opposingly arranged in the radio power feeding system, and miniaturization and enhancement of the transmission efficiency of the resonator 30 can be achieved.