Abstract:
The disclosure relates to technology beam steering in which one or more antennas are configured to form a beam directed to a first beam direction based on a configuration corresponding to an environment. A change in direction of the beam is identified in response to a change in orientation of user equipment, the change in orientation determined via one or more sensors in the user equipment, and a second beam direction is calculated based on a the first beam direction and the change in orientation of the user equipment. The one or more antennas are then configured by steering the beam to the second beam direction to compensate for the change in orientation of the user equipment.
Abstract:
An electronic device includes a housing having a first panel connected to a second panel movable between folded and unfolded configurations. A first antenna is located adjacent to the first panel and a second antenna is located adjacent to the second panel. The second antenna is activated when the housing is in an unfolded configuration and is deactivated when the housing is in a folded configuration.
Abstract:
An embodiment antenna system includes a first antenna portion configured to transmit a first signal received from a first feed and a second antenna portion configured to transmit a second signal received from a second feed. The second antenna portion is capacitively coupled to the second feed and inductively coupled to the first antenna portion, and the second signal has a frequency greater than a frequency of the first signal.
Abstract:
An apparatus comprises a radio frequency (RF) antenna circuit; an antenna aperture tuning circuit; an antenna impedance measurement circuit; and a processor circuit electrically coupled to the tunable antenna aperture circuit and the impedance measurement circuit. The processor circuit is configured to: set the antenna aperture tuning circuit to an antenna aperture tuning state according to one or more parameters of an RF communication network; initiate an antenna impedance measurement; and change the antenna aperture tuning state to an antenna aperture tuning state indicated by the antenna impedance.
Abstract:
An embodiment antenna system includes a first antenna portion configured to transmit a first signal received from a first feed and a second antenna portion configured to transmit a second signal received from a second feed. The second antenna portion is capacitively coupled to the second feed and inductively coupled to the first antenna portion, and the second signal has a frequency greater than a frequency of the first signal.
Abstract:
The disclosure relates to technology for beam searching. Beam searching includes forming an omnidirectional radiation pattern by a group of antenna elements including one antenna element from each of one or more phased array antennas. In response to detection of beams from a transmitter, searching for one antenna element in the group according to a combined signal strength of each antenna element in the group; and enabling a phased array antenna with the one antenna element to align with the beams.
Abstract:
System and method embodiments are provided for a broadband switchable antenna. The embodiments enable an easily tunable, temporally switchable antenna with good low- and high-band performance with controlled high impedance loci that easily coexists with other wireless device components. In an embodiment, a broadband switchable antenna includes an antenna feed; a high-band antenna arm comprising a first end electrically coupled to an antenna feed and a second end electrically coupled to ground; a switch coupled to the antenna feed at a position proximate to the first end of the high-band antenna arm; and a low-band antenna arm comprising a first end electrically coupled to the switch, wherein the antenna is configured to operate in a high-band mode when the switch is open and to operate in a low-band mode when the switch is closed.
Abstract:
An antenna's resonance frequency is detuned when a part of a human body approaches or contacts the antenna and consequently results in efficiency loss. The antenna may be tuned by changing its total load capacitance such that the antenna's total load capacitance falls within a reference capacitance range of a reference capacitance, where the antenna can operate at or near its pre-determined operating resonance frequency. A tunable capacitor may be coupled to the antenna for tuning the total load capacitance of the antenna.
Abstract:
An apparatus for satisfying Specific Absorption Rate (SAR) compliance criteria including a first capacitance sensor, a second capacitance sensor, a memory, and a processor. The memory is configured to store pre-established proximity regions that include a free space region of proximity based on baseline capacitance measurements obtained from the sensors when no human body is proximate a wireless device and a first region of proximity based on initial capacitance measurements obtained from the sensors when the human body is spaced apart from the wireless device by a first predetermined separation distance. The processor is configured to instruct a radio frequency (RF) transmitter to operate at a first output power when subsequent capacitance measurements received from the sensors are within the free space region of proximity and at a second output power, less than the first output power when the subsequent capacitance measurements are within the first region of proximity.
Abstract:
Embodiments are provided for resolving, at a user equipment (UE), unnecessary frequent consecutive back and forth reselections between the same two or more network cells. In an embodiment method, upon detecting predefined criteria indicating reaching a threshold frequency of reselections between the same cells, the UE switches to a defined mobility state reducing the frequency of reselections between the same cells. In accordance with the defined mobility state, the method increases a waiting time for cell reselection. The predefined criteria includes detecting the UE in a defined Static-idle state, detecting a serving cell of the UE and a strongest neighbor cell having approximately equal signal quality for a defined duration or a defined number of consecutive measurements, and detecting a number of consecutive reselections between the same cells exceeding a defined minimum threshold.