Abstract: Certain aspects of the present disclosure provide techniques for radio frequency (RF) exposure with antenna grouping. An example method for grouping antennas for RF exposure compliance by a processing system generally includes determining RF exposure distributions per transmit antenna configuration for a plurality of transmit antennas and assigning the plurality of transmit antennas to a plurality of antenna groups based on the RF exposure distributions.

Abstract: A wireless headset includes a housing and a power system disposed in a cavity enclosed by the housing and configured to supply power to the wireless headset. The wireless headset further includes a first electrical connector and a second electrical connector disposed on the housing of the wireless headset and are respectively electrically connected to two electrodes of the power system. The housing includes a rod body and an earbud connected to a top of the rod body, wherein the first electrical connector is located at a bottom end of the rod body, and the second electrical connector is located on an outer side wall of the earbud.

Abstract: A sound barrier system for reducing electric field distortion includes a wall unit and a sound barrier unit. The sound barrier unit includes a sound barrier plate that, from top to bottom, includes an arc-shaped part, an inclined part, and a vertical part that are integrally formed, wherein a center of a circle of the arc-shaped part points towards an interior of a power facility, the inclined part is tilted away from the power facility from top to bottom and is tangent to the arc-shaped part, and a lower end of the vertical part is arranged on a top of the wall unit. The sound barrier system further includes an energy supply pipeline, a security device, and an online monitoring device. The sound barrier system can be easily manufactured, and not only can improve an acoustic environment around a substation, but also can reduce an amplitude of an electric field.

Abstract: Techniques and apparatus for managing exceptions to radio frequency (RF) exposure compliance are described. An example method of wireless communication by a wireless device generally includes detecting a transmission is associated with an authorized exception to RF exposure compliance. The method also includes determining an allowable transmit power level for a time interval independent of a time-averaged RF exposure limit in response to detecting the transmission is associated with the authorized exception. The method further includes transmitting a signal in the time interval based on the allowable transmit power level.

Abstract: Techniques and apparatus for radio frequency (RF) exposure management for multiple radios are described. An example method of wireless communication by a wireless device generally includes determining a first exposure associated with a first radio for a first transmission in a first time interval; determining a first allowable transmit power associated with a second radio for a second time interval based at least in part on the first exposure associated with the first radio; and transmitting a first signal at a first transmit power in the second time interval using the second radio based on the first allowable transmit power.

Abstract: Techniques and apparatus for generating a compressed radio frequency (RF) exposure map and using such a compressed RF exposure map for determining a transmit power to meet RF exposure compliance limits are described. An example method generally includes obtaining a first RF exposure map associated with at least one antenna of a wireless device and converting the first RF exposure map to a second RF exposure map. The second RF exposure map is compressed compared to the first RF exposure map. Another example method includes accessing an RF exposure map associated with at least one antenna of the wireless device. The RF exposure map includes a representation of a maximum RF exposure for a region of the RF exposure map. The method also includes transmitting, from the antenna(s), a signal at a transmit power determined based on the RF exposure map in compliance with an RF exposure limit.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In certain configurations, the apparatus may be a user equipment (UE). The apparatus may receive configuration information for UL and DL transmissions from another device such as a base station. The apparatus may determine a maximum duty cycle of the UL transmission based on the configuration information. Based on the determined UL maximum duty cycle, the apparatus may determine a transmit power limit for the UL transmission. In one aspect, the apparatus may determine the UL transmit power limit by dividing the power corresponding to a maximum permissible exposure (MPE) limit by the determined maximum UL duty cycle. The apparatus may leverage the forward knowledge of the UL duty cycle to transmit at a power level that complies with the MPE limit while avoiding the poor uplink range associated with static power back-off.

Abstract: A substrate includes a dielectric structure, a conductive layer, a first hole and a second hole. The conductive layer is stacked on the dielectric structure. The first hole extends from a top surface of the conductive layer and exposes the dielectric structure. The second hole is spaced apart from the first hole, extends from the top surface of the conductive layer and exposes the dielectric structure. A first depth of the first hole is substantially equal to a second depth of the second hole. An elevation of a topmost end of the first hole is different from an elevation of a topmost end of the second hole.

Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.

Abstract: A package structure includes a conductive feature structure, a die, an adhesive layer, an insulator, a through via, and an encapsulant. The die is disposed over the conductive feature structure. The adhesive layer is disposed below the die. The insulator is disposed between the adhesive layer and a polymer layer of the conductive feature structure. The through via extends through the insulator to connect to the conductive feature structure. The encapsulant is disposed on the insulator and the conductive feature structure, laterally encapsulating the die and the through via, and between the through via and the insulator. The insulator has a coefficient of thermal expansion less than a coefficient of thermal expansion of the encapsulant.

Abstract: A multilayer stacking wafer bonding structure is provided in the present invention, including a logic wafer with a substrate and a logic circuit layer on the substrate, multiple memory wafers bonded sequentially on the logic circuit layer to form a first multilayer stacking structure, wherein each memory wafer includes a memory layer, a silicon layer on the memory layer and multiple oxide layers in trenches of the silicon layer, and the oxide layers in the memory wafers are aligned each other in a direction vertical to the substrate, and multiple through-oxide vias (TOV) extending through the memory layers and the oxide layers in the first multilayer stacking structure into the logic circuit layer, and the TOVs do not extend through any of the silicon layers.

Abstract: A golf teaching method and a golf teaching system are provided. The golf teaching method includes: configuring image capturing devices and golf simulator to capture swing images and corresponding simulator data records, when a user performs a golf swing; configuring an expert model that includes expert motion information and corresponding correction suggestion information; configuring a computing device to perform an analysis process on the swing images and the simulator data records to divide the golf swing into user motions according to stages and obtaining records of user motion information corresponding to the plurality of stages, and to compare the user motion information with the corresponding expert motion information in each stage through the expert model, and to provide the corresponding correction suggestion information according to a comparison result; and configuring a user interface to provide the correction suggestion information.

Abstract: A wafer stack structure includes an interlayer, a first wafer, and a second wafer. The interlayer has a first surface and a second surface opposite to the first surface. The intermediate layer includes a dielectric material layer and a redistribution layer embedded in the dielectric material layer. The first wafer is disposed on the first surface of the interlayer. The second wafer is disposed on the second surface of the interlayer. The second wafer is electrically connected to the first wafer through the redistribution layer of the interlayer.

Abstract: Techniques and apparatus for configurable radio frequency (RF) exposure compliance based on region. An example method of wireless communication by a user equipment (UE) generally includes identifying a region in which the UE is located, selecting at least one of a mode or one or more parameters for RF exposure compliance based on the identified region, and transmitting a signal at a transmission power level based at least in part on the at least one of the selected mode or the selected one or more parameters.

Abstract: A light-emitting device includes: a semiconductor stack, including a first semiconductor layer, an active region and a second semiconductor layer; a first contact electrode and a second contact electrode formed on the semiconductor stack, wherein the first contact electrode includes a first contact part formed on the first semiconductor layer and the second contact electrode includes a second contact part formed on the second semiconductor layer; an insulating stack formed on the semiconductor stack, including an opening on the second contact part; a first electrode pad and a second electrode pad formed on the insulating stack, wherein the second electrode pad filled in the opening and connecting the second contact part; wherein the second electrode pad includes an upper surface, and the upper surface includes a platform area and a depression area on the second contact part; wherein the platform area has a maximum height relative to other areas of the upper surface; wherein an area of a projection of the plat

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for radio frequency exposure evaluation per surface. A method of wireless communication by a wireless device includes accessing radio frequency (RF) exposure information associated with different surfaces among a plurality of surfaces of the wireless device; and transmitting a signal at a transmit power determined based at least in part on the RF exposure information and an RF exposure limit.

Abstract: Aspects of the present disclosure facilitate assessment of radio frequency (RF) exposure from a wireless device supporting multiple-input-multiple-output (MIMO) transmissions using multiple antennas. In certain aspects, MIMO RF exposure distributions for one or more MIMO transmissions are determined and stored in a memory. To assess RF exposure for a MIMO transmission, a processor may retrieve the corresponding MIMO RF exposure distributions from the memory, linearly combine the MIMO RF exposure distributions to obtain a combined MIMO RF exposure distribution, and assess RF exposure compliance based on the combined MIMO RF exposure distribution. In one example, the MIMO RF exposure distribution may include MIMO specific absorption rate (SAR) distributions.

Abstract: Certain aspects of the present disclosure provide techniques for operating a wireless device pursuant to radio frequency (RF) exposure compliance. A method that may be performed by a wireless device includes switching sensing circuitry to a first mode in response to one or more first criteria being satisfied; switching the sensing circuitry to a second mode in response to one or more second criteria being satisfied; and transmitting a signal at a transmit power determined based at least in part on a radio frequency (RF) exposure limit, and if the sensing circuitry is operating in the second mode, on one or more measurements associated with the sensing circuitry.

Abstract: In certain aspects, a method for wireless communication includes transmitting a first transmission with a first transmitter operable according to a first radio technology, and transmitting a second transmission with a second transmitter after completion of the first transmission, the second transmitter operable according to a second radio technology. The method may also include delaying transmission of the second transmission by a predetermined wait time after completion of the first transmission if the first radio technology is a radio frequency (RF) exposure time-averaged technology and the second radio technology is a non-time-averaged RF exposure technology. The method may also include transmitting the second transmission with a limited peak power for a predetermined time period for at least a portion of the second transmission if the first radio technology is a non-time-averaged RF exposure technology and the second radio technology is a time-averaged RF exposure technology.

Abstract: A detection method for determining chloride ions content in sea sand includes the steps of drying sea sand to a constant weight, adding the dried sea sand to boiling deionized water, fully stirring, and standing and filtering the deionized water to obtain washed sea sand and a washed filtrate. The washed sea sand is then ground into a powder and added into deionized water and fully stirred, the deionized water then filtered to obtain a powder filtrate. Half of the washed filtrate and half of the powder filtrate is then mixed and stirred to prepare a mixed filtrate. The chloride ions content in each of the washed filtrate, the powder filtrate, and the mixed filtrate is then measured by using a silver nitrate titration method. The detection results are then analyzed and corrected to obtain the chloride ions content in the sea sand.