Patent ID: 11860247
Assignee: DENSO CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A magnetic field generator comprising:
an upper layer coil composed of a first conductive material and forming a loop circuit having a coil portion;
a lower layer coil composed of a second conductive material and forming a loop circuit having a coil portion arranged opposite to the coil portion of the upper layer coil at a predetermined distance;
a substrate supporting the upper layer coil and the lower layer coil and having a dielectric material between the upper layer coil and the lower layer coil;
a ground layer having a ground potential arranged to sandwich the upper layer coil and the lower layer coil on one surface and an other surface of the substrate; and
a lower layer power source that supplies a high-frequency current to the lower layer coil, wherein
the upper layer coil is a resonance coil that is magnetically coupled or electrically coupled to the lower layer coil,
by supplying the high-frequency current to the lower layer coil, a high-frequency current having a phase opposite to that of the high-frequency current supplied to the lower layer coil flows through the upper layer coil, and
a length per loop of the coil portion in the upper layer coil and in the coil portion in the lower layer coil is matched to one wavelength of the high-frequency current.