Patent ID: 6163305
Filing Date: 2000-12-19
Classification: H01Q

Abstract:
A loop antenna having a first antenna for generating a first magnetic field and a second antenna for generating a second magnetic field such that the first magnetic field and the second magnetic field each have a different axis, the loop antenna device comprising:a series resonant circuit provided to the first antenna, the series resonant circuit comprising a ferrite member, a first coil wound around the ferrite member, a resonant capacitor, and a power source connected thereto in series, the series connection of the resonant capacitor and the power source being connected across the first coil in series; anda parallel resonant circuit provided to the second antenna, the parallel resonant circuit having a link coil wound around the ferrite member, a second coil connected to the link coil in series and wound around a member outside the ferrite member, and a resonant capacitor connected in parallel to the series connection of the second coil and the link coil.