Abstract: Techniques for wirelessly charging small power receiving units are disclosed. An example power receiving unit includes a transportation mechanism to enable the power receiving unit to move and a wireless communication system that enables the power receiving unit to communicate with a plurality of other power receiving units. The power receiving unit is a master unit and the other power receiving units are nodes that take commands from the master unit. The power receiving unit also includes a controller to command the nodes to form a composite receive coil over a power transmitting unit and communicate with the power transmitting unit to start a charging session.

Abstract: Cellular antennas having a mutual coupling can be isolated by the generation of an additional current path along a ground plane. A first antenna element can resonate at a resonance that interferes with and is mutually coupled to a second antenna element operating in a same frequency range, such as a low band frequency range. One or more parasitic scattering elements can generate the additional current path between the two antennas and isolate the two antennas from one another. A parasitic scattering element can comprise two capacitors that alter a radiation pattern of one of the antennas and decrease a correlation between both antennas.

Abstract: Techniques for wirelessly charging small power receiving units are disclosed. An example power receiving unit includes a transportation mechanism to enable the power receiving unit to move and a wireless communication system that enables the power receiving unit to communicate with a plurality of other power receiving units. The power receiving unit is a master unit and the other power receiving units are nodes that take commands from the master unit. The power receiving unit also includes a controller to command the nodes to form a composite receive coil over a power transmitting unit and communicate with the power transmitting unit to start a charging session.

Abstract: Antenna systems that can include first and second radiators and an electromagnetic coupler disposed adjacent to the first and the second radiators. The radiators can be tunable to one or more frequencies. The electromagnetic coupler can be, for example, an inductive coupler or a capacitive coupler. One or more of the antenna systems can be configured to use carrier aggregation by tuning the first and/or the second radiators. For example, one or more of the antenna systems can be configured to use inter-band aggregation, intra-band contiguous aggregation, and intra-band non-contiguous aggregation.

Abstract: A first antenna element is indirectly coupled to communication signals via a coupler that is located within a same volume of a body. A second antenna element is proximate to and adjacent the first antenna element. The first antenna element is configured to operate in a first frequency range and the second antenna element is configured to operate within a subset of the first frequency range concurrent with or simultaneously to the first antenna element. The coupler can operate to couple multiple antenna elements operating at different frequencies within the same volume of the body.

Abstract: Cellular antennas having a mutual coupling can be isolated by the generation of an additional current path along a ground plane. A first antenna element can resonate at a resonance that interferes with and is mutually coupled to a second antenna element operating in a same frequency range, such as a low band frequency range. One or more parasitic scattering elements can generate the additional current path between the two antennas and isolate the two antennas from one another. A parasitic scattering element can comprise two capacitors that alter a radiation pattern of one of the antennas and decrease a correlation between both antennas.

Abstract: A cellular low band antenna is indirectly coupled to communication signals via a first coupler that is located within a same volume of a body as one or more wireless local area network (WLAN) antennas. Various antenna configurations can include the one or more WLAN antennas being indirectly coupled to communication signals via a second coupler within the same volume as the cellular low band antenna. A high band antenna is located in a different volume that is adjacent to the volume of the cellular low band antenna and the one or more WLAN antennas. Another similar antenna system can be provided in a separate volume for diversity communications in a communication device, such as a tablet, laptop or other such communication device.

Abstract: In a wireless network, a user equipment (UE) can communicate with an Evolved Node B (eNodeB). During at least some times, the UE transmits a data stream to the eNodeB, over one of several available antenna states on the UE. The antenna states can include one or more tuning states for each antenna port on the UE. At predetermined times, which can be periodic, the UE ceases transmission of the data stream, transmits a test signal sequentially over each of its antenna states, receives a signal back from the eNodeB indicating which of the antenna states provides the strongest signal, and switches to the indicated antenna state. After switching, the UE can resume transmission of the data stream over the indicated antenna state. In some examples, the UE can repeat the antenna tuning/retuning process periodically.

Abstract: In a wireless network, a user equipment (UE) can communicate with an Evolved Node B (eNodeB). During at least some times, the UE transmits a data stream to the eNodeB, over one of several available antenna states on the UE. The antenna states can include one or more tuning states for each antenna port on the UE. At predetermined times, which can be periodic, the UE ceases transmission of the data stream, transmits a test signal sequentially over each of its antenna states, receives a signal back from the eNodeB indicating which of the antenna states provides the strongest signal, and switches to the indicated antenna state. After switching, the UE can resume transmission of the data stream over the indicated antenna state. In some examples, the UE can repeat the antenna tuning/retuning process periodically.

Abstract: An apparatus and method to provide isolation between a first antenna and a second antenna, each of which is located on a ground plane. A slot that is tunable by a variable reactance is located on the ground plane, the slot not being appreciably resonant at the operating frequency of the first antenna and the second antenna. The antennas operate in an orthogonal mode. Varying the slot reactance varies the electrical distance over which the coupling current between the two antennas flows. Increased RF isolation to a desired magnitude results by maintaining the orthogonality at desired bands. The RF isolation can be measured and a departure from the desired magnitude of isolation causes the reactance to be varied to increase the RF isolation back to the desired magnitude. The antennas and the slot are placed at locations on the ground plane of high current density.

Abstract: A cellular low band antenna is indirectly coupled to communication signals via a first coupler that is located within a same volume of a body as one or more wireless local area network (WLAN) antennas. Various antenna configurations can include the one or more WLAN antennas being indirectly coupled to communication signals via a second coupler within the same volume as the cellular low band antenna. A high band antenna is located in a different volume that is adjacent to the volume of the cellular low band antenna and the one or more WLAN antennas. Another similar antenna system can be provided in a separate volume for diversity communications in a communication device, such as a tablet, laptop or other such communication device.

Abstract: An apparatus and method to provide isolation between a first antenna and a second antenna, each of which is located on a ground plane. A slot that is tunable by a variable reactance is located on the ground plane, the slot not being appreciably resonant at the operating frequency of the first antenna and the second antenna. The antennas operate in an orthogonal mode. Varying the slot reactance varies the electrical distance over which the coupling current between the two antennas flows. Increased RF isolation to a desired magnitude results by maintaining the orthogonality at desired bands. The RF isolation can be measured and a departure from the desired magnitude of isolation causes the reactance to be varied to increase the RF isolation back to the desired magnitude. The antennas and the slot are placed at locations on the ground plane of high current density.

Abstract: Antenna systems that can include first and second radiators and an electromagnetic coupler disposed adjacent to the first and the second radiators. The radiators can be tunable to one or more frequencies. The electromagnetic coupler can be, for example, an inductive coupler or a capacitive coupler. One or more of the antenna systems can be configured to use carrier aggregation by tuning the first and/or the second radiators. For example, one or more of the antenna systems can be configured to use inter-band aggregation, intra-band contiguous aggregation, and intra-band non-contiguous aggregation.

Abstract: In a wireless network, a user equipment (UE) can communicate with an Evolved Node B (eNodeB). During at least some times, the UE transmits a data stream to the eNodeB, over one of several available antenna states on the UE. The antenna states can include one or more tuning states for each antenna port on the UE. At predetermined times, which can be periodic, the UE ceases transmission of the data stream, transmits a test signal sequentially over each of its antenna states, receives a signal back from the eNodeB indicating which of the antenna states provides the strongest signal, and switches to the indicated antenna state. After switching, the UE can resume transmission of the data stream over the indicated antenna state. In some examples, the UE can repeat the antenna tuning/retuning process periodically.

Abstract: A first antenna element is indirectly coupled to communication signals via a coupler that is located within a same volume of a body. A second antenna element is proximate to and adjacent the first antenna element. The first antenna element is configured to operate in a first frequency range and the second antenna element is configured to operate within a subset of the first frequency range concurrent with or simultaneously to the first antenna element. The coupler can operate to couple multiple antenna elements operating at different frequencies within the same volume of the body.