Abstract: An apparatus may include a near field communication (NFC) antenna coil and a wireless power receiving coil. The NFC antenna coil and the receiving coil may be arranged on a magnetic sheet. The wireless power receiving coil may be concentrically disposed on the magnetic sheet within an inner periphery of the NFC antenna coil. An inner diameter of the wireless power receiving coil may be greater than or equal to an inner diameter of reference listener antenna coil RL-6, of the reference listener coils specified by the NFC forum.

Abstract: A device includes a first loop antenna and a second loop antenna. The first loop antenna includes at least three sides, wherein at least two of the sides form an acute interior angle. The second loop antenna includes at least one side that runs in a substantially parallel direction to one of the at least three sides of the first loop antenna. The first loop antenna and the second loop antenna are arranged substantially on the same plane.

Abstract: A device includes a first loop antenna and a second loop antenna. The first loop antenna includes at least three sides, wherein at least two of the sides form an acute interior angle. The second loop antenna includes at least one side that runs in a substantially parallel direction to one of the at least three sides of the first loop antenna. The first loop antenna and the second loop antenna are arranged substantially on the same plane.

Abstract: An apparatus may include a near field communication (NFC) antenna coil and a wireless power receiving coil. The NFC antenna coil and the receiving coil may be arranged on a magnetic sheet. The wireless power receiving coil may be concentrically disposed on the magnetic sheet within an inner periphery of the NFC antenna coil. An inner diameter of the wireless power receiving coil may be greater than or equal to an inner diameter of reference listener antenna coil RL-6, of the reference listener coils specified by the NFC forum.

Abstract: An electronic device includes a contactless integrated circuit card function unit, a contactless charging function unit, and a switching unit. The contactless integrated circuit card function unit includes a clamp circuit and realizes a contactless integrated circuit card function. The clamp circuit suppresses excessive voltage of a signal received at an antenna whose operating frequency is a predetermined frequency. The contactless charging function unit commonly uses the antenna and realizes a contactless charging function. The switching unit invalidates or reduces the function of the clamp circuit when the contactless charging function unit is used.

Abstract: A non-contact wireless communication apparatus and a mobile terminal apparatus are provided.

Abstract: An electronic device includes a contactless integrated circuit card function unit, a contactless charging function unit, and a switching unit. The contactless integrated circuit card function unit includes a clamp circuit and realizes a contactless integrated circuit card function. The clamp circuit suppresses excessive voltage of a signal received at an antenna whose operating frequency is a predetermined frequency. The contactless charging function unit commonly uses the antenna and realizes a contactless charging function. The switching unit invalidates or reduces the function of the clamp circuit when the contactless charging function unit is used.

Abstract: The present invention provides a contactless communication circuit having both a contactless communication card function and a contactless communication reader/writer function, which includes a capacitor section that forms a parallel-resonant circuit with a contactless communication antenna; and a capacitance switching section that makes a capacitance of the capacitor section effective in a mode of the contactless communication card function, and reduces the capacitance of the capacitor section in a mode of the contactless communication reader/writer function.

Abstract: A non-contact wireless communication apparatus and a mobile terminal apparatus are provided.

Abstract: A reader/writer is provided. The reader/writer performing radio communication with a radio communication terminal in close proximity thereto, includes: an antenna which transmits a carrier wave of a predetermined frequency and which receives a composite wave of the carrier wave and a modulated signal of the carrier wave transmitted from the radio communication terminal; a demodulating unit which demodulates the composite wave received by the antenna; a judging unit which judges whether or not it is difficult to detect a modulated component included in the composite wave received by the antenna when the radio communication terminal is in close proximity; and a carrier-wave control unit which reduces a component of the carrier wave input into the demodulating unit when the judging unit judges that it is difficult to detect the modulated component.

Abstract: The present invention provides a contactless communication circuit having both a contactless communication card function and a contactless communication reader/writer function, which includes a capacitor section that forms a parallel-resonant circuit with a contactless communication antenna; and a capacitance switching section that makes a capacitance of the capacitor section effective in a mode of the contactless communication card function, and reduces the capacitance of the capacitor section in a mode of the contactless communication reader/writer function.

Abstract: A reader/writer is provided. The reader/writer performing radio communication with a radio communication terminal in close proximity thereto, includes: an antenna which transmits a carrier wave of a predetermined frequency and which receives a composite wave of the carrier wave and a modulated signal of the carrier wave transmitted from the radio communication terminal; a demodulating unit which demodulates the composite wave received by the antenna; a judging unit which judges whether or not it is difficult to detect a modulated component included in the composite wave received by the antenna when the radio communication terminal is in close proximity; and a carrier-wave control unit which reduces a component of the carrier wave input into the demodulating unit when the judging unit judges that it is difficult to detect the modulated component.