Patent ID: 8264305

Claim:
A resonator disposed adjacent to a conductor in which current including a predetermined frequency component flows to generate resonance in response to a magnetic flux of an electromagnetic wave generated by the current, the resonator comprising: a plurality of pairs of electrodes each including first and second electrodes facing each other with an insulator disposed therebetween; a third electrode electrically connected to each of the first electrodes; and a fourth electrode electrically connected to each of the second electrodes, wherein the resonator is disposed so that respective electrode planes of the first and second electrodes are substantially parallel to a line of magnetic force which is generated when the current flows in the conductor, respective electrode planes of the third and fourth electrodes are substantially parallel to the line of magnetic force in planes different from the respective electrode planes of the first and second electrodes, and the resonator is not electrically connected to the conductor or to a ground electrode in a floated state.