Abstract: An electronic device may transfer power wirelessly to an external device. The electronic device may include a housing having a cavity. A cover layer may be formed over the cavity. An array of antennas may be formed within the cavity. Antennas in the array may transfer wireless charging signals to the external device through the cover layer to charge the external device while the external device is in contact with the cover layer. Impedance detection circuitry may gather impedance matching information from each antenna in the array. Control circuitry may select an antenna having a best impedance match with the external device for transmitting the wireless charging signals. One or more antennas in the array may form a block filter for the selected antenna. Multiple near-field coupled antennas in the array may be selected for transmitting the charging signals to focus the charging signals on the external device.

Abstract: An inductive power transmission system electromagnetic field shielding apparatus includes an enclosure. The enclosure is configured to surround an electronic device and an inductive power transmitter that inductively transmits power to the electronic device. A communication window or high pass filter is formed in the enclosure. The communication window may include an arrangement of one or more conductive materials defining one or more apertures. The enclosure and the communication window block passage of magnetic flux generated by the inductive power transmitter. The communication window allows passage of communication transmissions associated with the electronic device.

Abstract: A mobile wireless communications device may include a housing, a wireless transceiver carried by the housing and having a primary output, and a secondary output, and a multiple-band antenna carried by the housing and coupled to the wireless transceiver. The multiple-band antenna may include a dielectric substrate and a pattern of electrically conductive traces thereon defining a primary radiator and a secondary radiator spaced apart from the primary radiator. The primary radiator may include a first elongate member having a primary feed coupled to the primary output, and a first reference member spaced from the first elongate member and at least partially laterally surrounding the first elongate member and coupled to a reference voltage. The secondary radiator may include a second elongate member having a secondary feed coupled to the secondary output.

Abstract: A mobile wireless communications device may include a housing, a wireless transceiver carried by the housing and having a primary output, and a secondary output, and a multiple-band antenna carried by the housing and coupled to the wireless transceiver. The multiple-band antenna may include a dielectric substrate and a pattern of electrically conductive traces thereon defining a primary radiator and a secondary radiator spaced apart from the primary radiator. The primary radiator may include a first elongate member having a primary feed coupled to the primary output, and a first reference member spaced from the first elongate member and at least partially laterally surrounding the first elongate member and coupled to a reference voltage. The secondary radiator may include a second elongate member having a secondary feed coupled to the secondary output.