Microsoft Technology Licensing, LLC

Charbel Khawand

Sean Russell Mercer

Scott A Fudally

Denis Demandolx

Steve Glenner

Wenkai Zhong

Robert Milausnic

Junghwan Moon

Chanwoo Kim

Marc Harper

Sharon Drasnin

Jaejin Lee

Jean Khawand

Srinivasa Lakshmana Rao

Gary Russell McClary

Mahesh Suresh Yadav

Toby James Morris

Sidharath Jain

Mark J Seilstad

Marshall Joseph Katz

Darene Brice Lewis

Mahesh M Pai

Tae Hwan Jung

Shivam Kiran Shah

Apoorva Sharma

Peter Mikolajczyk

Paul Klies

Guy Bernard Major

Edward Charles Leacock

Devin S J Caplow-Munro

Shivam K Shah

Mark John Seilstad

The disclosed technology is generally directed to a mobile device with an active rear cover. In one example of the technology, an apparatus comprises a mobile device, including: a chassis that has a recessed region, electronic components disposed in the chassis, and, embedded in the recessed region, a rear cover. The rear cover is removable. The rear cover has flexural rigidity. The rear cover includes: a cover layer that is RF-transparent and a functional layer that is disposed beneath the cover layer. The functional layer includes a plurality of electrical connections. The functional layer is laminated to the cover layer. At least one electrical connection of the plurality of electrical connections is connected to the electronic components disposed in the chassis. The functional layer is structured such that inclusion of the functional layer in the rear cover provides a majority of the flexural rigidity of the rear cover.

Laminate rear cover with stiffened functional layer

An FPC cable assembly is provided that includes a first ground layer, a second ground layer, and at least one signal line sandwiched by the first and second ground layers. The FPC cable assembly further includes an electromagnetic shielding structure including a first magnetic layer at least partially covering and electrically grounded to the first ground layer, a second magnetic layer at least partially covering and electrically grounded to the second ground layer, and a plurality of magnetic rings magnetically engaged with and electrically contacting the first magnetic layer and the second magnetic layer so as to surround the first and second ground layers, the at least one signal line, and the first and second magnetic layers, thereby providing electromagnetic shielding of the at least one signal line.

Flexible printed circuit cable assembly with electromagnetic shielding

A system filters out-of-band radio frequency emissions generated by wireless transmission of a first signal by a first transmitter from a wireless transmission of a second transmitter. The first signal is communicated from the first transmitter to the second transmitter via one or more wired connections. An out-of-band portion of a modulated format of the first signal is inverted to generate an inverted out-of-band component signal. The inverted out-of-band component signal is combined with a second signal of the second transmitter to create a filtering second signal. The filtering second signal is wirelessly transmitted from the second transmitter concurrently with wireless transmission of the first signal by the first transmitter, wherein the wireless transmission of the inverted out-of-band component signal in the filtering second signal by the second transmitter is synchronized with the wireless transmission of the first signal by the first transmitter.

Out-of-band radio frequency emission filtering

Transmission power of a communication device is managed by detecting motion of the communication device using a motion sensor, classifying detected motion according to one or more motion classification conditions using one or more motion classification parameters, adjusting the one or more motion classification parameters applied to the classifying operation, responsive to the classifying operation, classifying the detected motion according to the one or more motion classification conditions using the one or more adjusted motion classification parameters, and adjusting the transmission power of the communication device based at least in part on the one or more motion classification conditions and the one or more adjusted motion classification parameters, responsive to the operation of classifying using the one or more adjusted motion classification parameters.

Motion-responsive transmission power management

The technology disclosed herein includes an apparatus including an antenna, a plurality of wireless endpoints using the antenna, and a co-ex manager configured to measure an activity level of a wireless endpoint over a predetermined time period, compare the measured activity level of the wireless endpoint with a threshold activity level, and in response to the comparison, change an antenna operating mode of the wireless endpoint.

Coexistence management in device communications

A radiofrequency (RF) power regulator includes a forward RF power detection circuit to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna. An RF power sampler is coupled to the forward RF power detector circuit and provides RF power samples of the supplied forward RF power. Multiple filters are coupled to receive the RF power samples. Each filter differently filters the received forward power samples to apply a different average power period. Each filter activates an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter. Forward RF power adjustment logic is coupled to filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.

Proximity-independent SAR mitigation

Radio Frequency (RF) power back-off optimization techniques are described for specific absorption rate (SAR) compliance. A mobile device may be configured to intelligently modify antennas and radio device transmission levels to maintain compliance with SAR limits while minimally perturbing radio operations. The mobile device may implement a SAR optimization scheme that accounts for user presence and signal conditions to maintain compliance. Rather than setting a fixed back-off, user presence detectors may be employed along with information on current signal conditions to determine potential for excessive SAR exposure and selectively apply variable adjustments to RF transmission power (e.g., 'back-offs'), accordingly. The mobile device may also be configured to report SAR conditions and/or mitigation actions to a base station to enable the base station to manage a connection to services based at least in part upon knowledge of SAR actions taken by the mobile computing device.

Radio frequency (RF) power back-off optimization for specific absorption rate (SAR) compliance

An example implementation provides a computing device including a first computing device portion having one or more electrical components, a first side, a second side, an electromagnetic coil, and a first metal frame having a first through-slot. The computing device also a second computing device portion having one or more other electrical components, a third side, a fourth side and a second metal frame having a second through-slot. A mechanical joint connects the first computing device portion and the second computing device portion such that the first side is positioned to face the third side and the electromagnetic coil overlaps the first through-slot and the second through-slot along an axis running orthogonal to the first computing device portion and the second computing device portion. Control circuitry adjusts matching to compensate different physical configurations, and firmware switches the radiofrequency configuration.

Multi-sided electromagnetic coil access assembly

The technology disclosed herein includes an apparatus including an antenna, a number of endpoints using the antenna, and a co-existence manager configured to share the antenna among the plurality of endpoints by sending a resource request to one or more of the plurality of endpoints with at least one of a time for antenna resource use and a priority level for the antenna resource use request. Once the co-existence manager has received acknowledgement from the endpoints controlling use of the antenna resource, programming a scheduler with one or more scheduled events controlling access to the antenna by the plurality of wireless endpoints, wherein the scheduled events control one or more switches to connect the plurality of wireless endpoints to the antenna.

Sharing antenna across wireless endpoints

A user interface for power management of a mobile communications device is described. In an implementation, power consumption used in performance of a plurality of tasks is monitored by a mobile communications device. A determination is made as to an amount of power that remains in a battery of the mobile communications device. A user interface is displayed on a display device of the mobile communications device that describes an amount of time each of the plurality of tasks may be performed based on the determined amount of power that remains in the battery.

Power management of a mobile communications device

A wireless transmission system disclosed herein includes a radiating structure integrated into a computing device case that substantially encloses electronics of a computing device. The radiating structure includes an insulator that forms a boundary with the metal plate on the computing device case. A proximity sensor collects data from an exposure point located within the radiating structure.

Radiating structure with integrated proximity sensing

Examples of the disclosure enable packet data access to be managed. In some examples, a device is coupled to a wireless network using a first access point name (APN). The wireless network includes a first packet data network (PDN) corresponding to the first APN and a second PDN. A request to couple the device to the wireless network using a second APN corresponding to the second PDN is received. When the device is configured to use a single PDN, a first instruction associated with decoupling the device from the wireless network is transmitted to the first PDN, and a second instruction associated with coupling the device to the wireless network using the second APN is transmitted to the second PDN. Aspects of the disclosure enable controlling or restricting packet data access to manage network resources.

Using a single packet data network for data transfers to manage network resources

An audio output that is configured to indicate a direction is described. In an implementation, a direction of a target is determined in relation to a computing device. An output of sound is configured by the computing device to indicate the direction of the target in relation to the computing device.

Growing community of inventors

Sammamish, WA, United States of America

Charbel Khawand