Abstract:
PROBLEM TO BE SOLVED: To provide antenna structures having resonating elements and parasitic elements within slots in conductive elements.SOLUTION: Electronic devices may include radio-frequency transceiver circuitry and antenna structures. The antenna structures may include antenna resonating elements such as dual-band antenna resonating elements that resonate in first and second communications bands. The antenna structures may also contain parasitic antenna elements such as elements that are operative in only the first or second communications band and elements that are operative in both the first and second communications bands. The antenna resonating elements and parasitic elements may be mounted on a common dielectric carrier. The dielectric carrier may be mounted within a slot or other opening in a conductive element. The conductive element may be formed from conductive housing structures in an electronic device such as a portable computer. The portable computer may have a clutch barrel with a dielectric cover. The dielectric cover may overlap and cover the slot and the dielectric carrier.
Abstract:
PROBLEM TO BE SOLVED: To provide electronic devices that contain wireless communications circuitry.SOLUTION: The wireless communications circuitry includes radio-frequency transceiver circuitry and antenna structures. A parallel-feed loop antenna is formed from portions of an electronic device bezel and a ground plane. The antenna operates in multiple communications bands. An impedance matching circuit for the antenna is formed from a parallel-connected inductive element and a series-connected capacitive element. The bezel surrounds a peripheral portion of a display that is mounted to the front of an electronic device. The bezel contains a gap. Antenna feed terminals for the antenna are located on opposing sides of the gap. The inductive element bridges the gap and the antenna feed terminals. The capacitive element is connected in series between one of the antenna feed terminals and a conductor in a transmission line located between the transceiver circuitry and the antenna.
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic device that contains a wireless communication circuit.SOLUTION: The wireless communication circuit includes a radio-frequency transceiver circuit and an antenna structure. A parallel-fed loop antenna is formed from portions of a conductive bezel and a ground plane. The antenna operates in multiple communications bands. The bezel surrounds a peripheral portion of a display that is mounted to the front of an electronic device. The bezel contains a gap. Antenna feed terminals for the antenna are located on opposing sides of the gap. A variable capacitor bridges the gap. An inductive element bridges the gap and the antenna feed terminals. A switchable inductor is coupled in parallel with the inductive element. A tunable matching circuit is coupled between one of the antenna feed terminals and a conductor in a coaxial cable connecting the transceiver circuit to the antenna.
Abstract:
PROBLEM TO BE SOLVED: To enable handsets used in own networks to produce certain minimum radio-frequency power so as to ensure satisfactory operation of the handsets.SOLUTION: An electronic device 10 has an antenna and associated wireless communications circuitry. A sensor 25, 27 such as a proximity sensor is used to detect that the electronic device is in close proximity to a user's head. Control circuitry within the electronic device may be used to adjust radio-frequency signal transmit power levels. When it is determined that the electronic device is within a given distance from the user's head, the radio-frequency signal transmit power level is reduced. When it is determined that the electronic device is not within the given distance from the user's head, proximity-based limits on the radio-frequency signal transmit power level are removed. Data may be gathered from a touch sensor, an accelerometer, an ambient light sensor and other sources for use in determining how to adjust the transmit power level.
Abstract:
PROBLEM TO BE SOLVED: To provide small and high-performance handheld electronic devices.SOLUTION: A slot 70 is formed on a grounding plate 54-2 which is electrically connected with a conductive bezel surrounding a peripheral part of a handheld electronic device housing, and a power is fed from a coaxial cable 56A-2 to configure a slot antenna. One or more antenna resonating elements 54-1A may be formed above the slot 70. In addition, an electrical switch that bridges the slot 70 may be used to modify the perimeter of the slot 70 so as to tune the communications bands of the handheld electronic device.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for authenticating a user of an electronic device, the electronic device, and a computer-readable medium.SOLUTION: An authentication system includes one or more sensors to detect biological information on a user. The sensors are positioned in the device such that the sensors may detect appropriate biological information when the user operates the device, without requiring the user to perform a step for providing the biological information (e.g., embedding a fingerprint sensor in an input mechanism instead of providing a fingerprint sensor in a separate part of a device housing). The authentication system may be operative to detect a visual or temporal pattern of inputs to authenticate the user. In response to the authentication, the user may access restricted files, applications (e.g., applications purchased by the user), or settings (e.g., application settings such as contacts or saved game profile).
Abstract:
PROBLEM TO BE SOLVED: To provide an antenna structure and an electric circuit that can fit into small wireless devices.SOLUTION: An electronic device has wireless communications circuitry including an adjustable antenna system coupled to a radio-frequency transceiver. The adjustable antenna system may include one or more adjustable electrical components that are controlled by storage and processing circuitry in the electronic device. The adjustable electrical components may include switches and components that can be adjusted between numerous different states. The adjustable electrical components may be coupled between antenna system components such as transmission line elements, matching network elements, antenna elements, and antenna feeds. By adjusting the adjustable electrical components, the storage and processing circuitry can tune the adjustable antenna system to ensure that the adjustable antenna system covers communications bands of interest.
Abstract:
PROBLEM TO BE SOLVED: To provide an antenna structure and an electric circuit that can fit into small wireless devices.SOLUTION: An electronic device has wireless communications circuitry including an adjustable antenna system coupled to a radio-frequency transceiver. The adjustable antenna system may include one or more adjustable electrical components that are controlled by storage and processing circuitry in the electronic device. The adjustable electrical components may include switches and components that can be adjusted between numerous different states. The adjustable electrical components may be coupled between antenna system components such as transmission line elements, matching network elements, antenna elements, and antenna feeds. By adjusting the adjustable electrical components, the storage and processing circuitry can tune the adjustable antenna system to ensure that the adjustable antenna system covers communications bands of interest.
Abstract:
PROBLEM TO BE SOLVED: To provide improved wireless circuitry for an electronic device.SOLUTION: A wireless electronic device comprises: antenna structures; and antenna tuning circuitry. The device includes a display mounted within a housing. A peripheral conductive member runs around the edges of the display and housing. Dielectric-filled gaps divide the peripheral conductive member into individual segments. A ground plane is formed within the housing. The ground plane and the segments of the peripheral conductive member form antennas in upper and lower portions of the housing. The antenna tuning circuitry includes switchable inductor circuits and variable capacitor circuits for the upper and lower antennas. The switchable inductor circuits associated with the upper antenna are tuned to provide coverage in at least two high-band frequency ranges of interest, whereas the variable capacitor circuits associated with the upper antenna are tuned to provide coverage in at least two low-band frequency ranges of interest.