NON-CONTACT WIRELESS COMMUNICATION COIL, TRANSMISSION COIL, AND PORTABLE WIRELESS TERMINAL

摘要

In a coil unit, a first magnetic body 11, a first coil 12 for non-contact power transmission, a second magnetic body 21, a substrate 30, and a second coil 22 for non-contact wireless communication are laminated in this order in the thickness direction of the coils. The first coil 12 and the second coil 22 at least partially overlap each other. A region in which the first coil and the second coil do not overlap each other is provided on the inner circumferential side of the first coil. The second coil 22 overlaps the outer circumference of the first coil 12. A resonance frequency of the first coil 12 is lower than a resonance frequency of the second coil 22. The permeability of the first magnetic body 11 is greater than the permeability of the second magnetic body 21.