Patent ID: 7990103

Claim:
A portable electronic device, comprising a radio receiver; a charging mechanism for charging a battery of the portable electronic device; and an antenna arrangement for the radio receiver, wherein the charging mechanism comprises a first coil arranged to interact with a charging station providing a magnetic field for power distribution to the portable electronic device upon charging; a rectifier connected to the first coil to receive an alternating current therefrom and to a power supply output to provide a direct current, and the antenna arrangement comprises an antenna element comprising the first coil; a resonator tuned for a frequency band in which the receiver is intended to receive radio transmissions; and a first series resonance circuit comprising a capacitor and a second coil connected in series between a first terminal of the first coil and a reference voltage of the portable apparatus, wherein the resonator comprises a second series resonance circuit connected between a second terminal of the first coil and the radio receiver, and further comprising a third resonance circuit arranged between the second terminal of the first coil and the rectifier to provide a high impedance at frequencies for radio reception and a low impedance for a frequency of the magnetic field for power distribution to the portable electronic device.