Abstract: There is provided a radio-frequency module that can reduce communication signal loss in both the case of employing one communication band of multiple communication bands and the case of employing two or more communication bands together. A radio-frequency module includes a first switching circuit and matching circuits. The matching circuits are provided individually for a first transmission path, a second transmission path, and a third transmission path. When communications are performed by using only a first communication band, the first switching circuit selects the first transmission path. When communications are performed by using together the first communication band and the second communication band, the first switching circuit selects the second transmission path and the third transmission path.

Abstract: A wireless power transmitter includes a power conversion unit configured to transfer wireless power to a wireless power receiver by forming magnetic coupling with the wireless power receiver; and a communication/control unit configured to communicate with the wireless power receiver to control transmission of the wireless power and to perform transmission or reception of data, wherein the communication/control unit is configured to: receive, from the wireless power receiver after a configuration phase, a received power packet (RPP) which indicates a value of the wireless power received by the wireless power receiver; transmit, to the wireless power receiver, a bit pattern which requests communication initiated by the wireless power transmitter in response to the RPP when the communication/control unit has data to be sent to the wireless power receiver; and receive a packet for polling the data to be sent from the wireless power receiver in response to the bit pattern.

Abstract: Provided are a device and method for performing authentication in a wireless power transfer system. Provided is an authentication method in a wireless power transfer system including receiving a first packet including indication information on whether a target device supports an authentication function from the target device; transmitting, when the target device supports an authentication function, an authentication request message to the target device; receiving an authentication response message including a certificate on wireless charging from the target device in response to the authentication request message; and confirming authentication of the target device based on the authentication response message.

Abstract: A terminal apparatus and a base station apparatus can efficiently communicate with each other through downlink. A terminal apparatus is configured to: acquire synchronization with a cell through cell search; and receive system information associated at least with (i) an operation of NB-IoT and (ii) a raster offset. The raster offset is an offset of downlink carrier frequency from a channel raster of prescribed spacing. The downlink carrier frequency is a carrier frequency of the NB-IoT.

Abstract: A system may include a switchable power domain configured to selectively be powered on and powered off during operation of the system and an always-on power domain configured to remain powered on during operation of the system, the always-on power domain including a power management unit. The power management unit may be configured to, in response to a shut down condition for powering down the switchable power domain, determine a state of a bus transaction on a communication bus between the switchable power domain and the always-on power domain and control one or more control signals for controlling the communication bus in order to manipulate completion of the bus transaction to prevent at least one of corruption of data of the bus transaction and a system freeze associated with the bus transaction.

Abstract: The present disclosure relates to antenna design for installation on small cell base stations. The antenna design corresponds to a conformal antenna design that fits into a traditional sun-shield of an outdoor base station. In another aspect, the antenna design supports multiple bands and multiple technologies. In a further aspect, the antenna design provides a gain pattern that allows installation of the small cells into directional sectors to further enhance the spectral efficiency while providing a single installation location. In still a further aspect, the design permits the form factor of the base station to meet unique and desirable aesthetic principals such as a modern curved surface and an attractive and distinctive height, width and depth ratio.

Abstract: A retimer is provided. The retimer includes: a data channel circuit, configured to implement, under a function of a current phase locked loop, equalization processing-based transparent transmission of a signal between a first communications device and a second communications device; and the link adjustment circuit, configured to: when determining, based on link status information of the data channel circuit, that a rate of a link needs to be changed, configure an operating parameter of a target phase locked loop as an operating parameter corresponding to a changed rate; and switch the currently used phase locked loop to the target phase locked loop when detecting that the link enters a rate-changing state, where the data channel circuit is further configured to implement, under a function of the target phase locked loop, the transparent transmission of a signal between the first communications device and the second communications device.

Abstract: A waveguide unit includes an interface unit configured to receive a transmission radio wave f1TX1 output from a transmission/reception processing unit, and output a reception radio wave f1RX1 to the transmission/reception processing unit. Further, the waveguide unit includes a transmission wave input port, a transmission wave output port, a reception wave input port, and a reception wave output port. Further, the waveguide unit includes a reception band-pass filter configured to pass the reception radio wave f1RX1 of a multiplex reception radio wave input to the reception wave input port and output the reception radio wave f1RX1 toward the interface unit, and, on the other hand, reflect a reception radio wave f1RX2 and output the reception radio wave f1RX2 toward the reception wave output port.

Abstract: A semiconductor storage device includes a memory cell array, a temperature sensor configured to generate a first temperature signal corresponding to a temperature of the memory cell array in response to a first command periodically generated during a waiting period of the memory cell array, a storage circuit configured to store the first temperature signal and update the first temperature signal each time the first command is generated during the waiting period, and a voltage generation circuit configured to generate a voltage to be applied to the memory cell array based on the first temperature signal stored in the storage circuit.

Abstract: A system and method for phase alignment of multiple PLLs are disclosed. The system comprises a plurality N of PLLs (PLL_1 . . . PLL_N) and a plurality N of phase detectors (DET_1 . . . DET_N). The plurality N of phase detectors and the plurality N of PLLs are connected in a loop such that an i-th phase detector (DET_i) is configured to receive an i-th feedback signal (FB_i) generated from the i-th PLL and an (i+1)-th feedback signal (FB_i+1) generated from the (i+1)-th PLL, and the N-th phase detector (DET_N) is configured to receive the first feedback signal (FB_1) generated from the first PLL and the N-th feedback signal (FB_N) generated from the N-th PLL. The an i-th phase detector (DET_i) is configured to generate an i-th adjustment signal indicating an i-th phase difference between the i-th and (i+1)-th feedback signals for adjusting a phase of the i-th or (i+1)-th PLL, wherein i=1, 2, 3, . . . N?1.

Abstract: Disclosed is a method by which a terminal reports beam information to a base station in a wireless communication system. The method comprises the steps of: receiving, from the base station, a beam measurement reference signal corresponding to each of a plurality of candidate transmission beams; determining at least one best transmission beam among the plurality of candidate transmission beams on the basis of the beam measurement reference signal; determining at least one worst transmission beam corresponding to each of the at least one best transmission beam among the plurality of candidate transmission beams by using a best reception beam corresponding to the at least one best transmission beam among candidate reception beams; reporting, to the base station, information on the at least one best transmission beam and the at least one worst transmission beam corresponding to the at least one best transmission beam.

Abstract: A power detector for use in an RF receiver. The detector includes a power reference generator and a power quantizer. The power reference generator develops a power reference current, voltage, or signal as a function of a power transferred via a received RF signal. The power quantizer is responsive to the power reference current, voltage, or signal to develop a digital field power value indicative of the power reference current, voltage, or signal.

Abstract: A communication system includes a transmitter and remote receivers having each a set of receive elements. The transmitter includes a preprocessor and a set of transmit elements which radiate shaped beams including probing signals through a multipath communication channel. The preprocessor computes channel state information based on received responses to the probing signals, generate composited transfer functions based on the channel state information, generate the shaped beams based on the composited transfer functions, and process a plurality of input signals to be transmitted via the shaped beams to the remote receivers. The channel state information includes transfer functions, each characterizing at least one propagation path from one transmit element to one receive element. Each composited transfer function is a linear combination of the transfer functions. Each receive element is identified by a user element identification index in the transfer functions.

Abstract: A method for communicating interactive data between heterogeneous devices, comprising receiving, by an intermediary computing device via a first wireless interface from a first computing device, interactive data from at least one sensor of the first computing device; extracting, by the intermediary computing device, at least one data string from the received interactive data; encapsulating, by the intermediary computing device, the extracted at least one data string in a transport layer header; and transmitting, by the intermediary computing device via a second wireless interface to a second computing device, the encapsulated at least one data string, wherein the second computing device extracts the at least one data string from the encapsulated transmission and forwards the at least one data string to a virtual human interface device (HID) driver executed by an operating system of the second computing device.

Abstract: In an operating method of a radio frequency integrated circuit (RFIC) including a transmission circuit and a reception circuit, the operating method includes receiving, from a modem, first information for setting transmission power of the transmission circuit or second information about a blocker which is a frequency signal unused by the RFIC, obtaining an allowable value of phase noise of a local oscillator included in the transmission circuit, using the first information, obtaining an allowable value of phase noise of a local oscillator included in the reception circuit, using the second information, determining a level of a driving voltage, using the obtained allowable values of the phase noises, and providing the driving voltage to the local oscillators.

Abstract: Embodiments of the present invention are directed to a cell protection system that may be employed in high voltage systems such as grid scale energy storage systems. In some embodiments, the advanced cell protection system includes a proactive balancing system for balancing one or more battery units of the energy storage systems. In some embodiments, the advanced cell protection system includes a switching protection system for safely connecting and disconnecting the one or more battery units of the energy storage systems to other systems. In some embodiments, the advanced cell protection system includes an isolated communication system for allowing the one or more battery units to safely communicate with each other and at least one controller of the energy storage system.

Abstract: In certain exemplary embodiments, register banks are used to allow for fast beam switching (FBS) in a phased array system. Specifically, each beam forming channel is associated with a register bank containing M register sets for configuring such things as gain/amplitude and phase parameters of the beam forming channel. The register banks for all beam forming channels can be preprogrammed and then fast beam switching circuitry allows all beam forming channels across the array to be switched to use the same register set from its corresponding register bank at substantially the same time, thereby allowing the phased array system to be quickly switched between various beam patterns and orientations. Additionally or alternatively, active power control circuitry may be used to control the amount of electrical power provided to or consumed by one or more individual beam forming channels such as to reduce DC power consumption of the array and/or to selectively change the effective directivity of the array.

Abstract: Aspects generally relate to tuning a guard ring in an integrated circuit. A guard ring with a gap surrounds a circuit. The level of isolation provided by the guard ring at a particular frequency can be adjusted by coupling a tuning circuit cross the gap of the guard ring. If the circuit in the guard ring is an inductive circuit the level of inductance at a particular frequency can be adjusted by selecting the appropriate tuning circuit across the gap of the guard ring.

Abstract: An integrated antenna structure is provided, which includes a substrate and a dual-polarized antenna unit disposed in the substrate and near a side edge of the substrate. The dual-polarized antenna unit includes a horizontally polarized antenna configured to generate a horizontally polarized beam and a vertically polarized antenna configured to generate a vertically polarized beam.

Abstract: Systems and methods are provided for reducing massive multiple-input multiple-output (mMIMO)/5G out-of-band-emission. After detecting interference with an adjacent band, the mMIMO unit (MMU) determines the best corrective action based on calculations to determine if the equivalent isotropically radiated power would still lead to emissions in the adjacent band and, if required, apply one or more corrective actions. In one corrective action, the MMU reduces the overall power by turning off certain power amplifiers driving the dipoles. In another corrective action, the MMU changes the antenna beam width automatically to sway away from the target. In yet another corrective action, the MMU alternates the output power control range. In each of the aspects, the analysis is based on distance and boresight azimuth, as well as location factors. In some aspects, a topographic map of the affected area is utilized to determine clutter so that the selected corrective action is most effective.

Abstract: A method of high reliability and early data transmission (EDT) is proposed. EDT allows one uplink transmission (optionally) followed by one downlink data transmission during a random-access channel (RACH) procedure, which can reduce the signaling overhead and save UE power. To improve reliability, for uplink EDT, there would be different set of RACH reattempt parameters in the UE for different types of access. For downlink EDT, there would be an indication in the paging message to trigger whether the UE would use legacy RACH or not. Further, the configuration for PRACH resource for EDT can be independent to legacy PRACH resource configuration. Under certain conditions, UE can fallback to legacy RACH procedure for high reliability.

Abstract: A method for authorizing the use of a motor vehicle by a portable identification transmitter is provided. According to the method, a first vehicle antenna emits a first signal, which is received by an identification-transmitter antenna. The identification transmitter determines at least one of the spatial components of the first electromagnetic field of the received first signal. A second vehicle antenna emits a second signal, which is received by the identification-transmitter antenna. The identification transmitter determines at least one of the spatial components of the second electromagnetic field of the received second signal. A computer determines the angle between the determined spatial component of the first electromagnetic field and the determined spatial component of the second electromagnetic field. The identification transmitter transmits an authorization signal for authorizing use of the motor vehicle to the motor vehicle only if the angle exceeds a predetermined threshold value.

Abstract: The present invention comprises a radio frequency modem with a precision timebase that utilizes a novel method of scheduling tasks to minimize average power draw of the system and extend life while running on limited power supplies. Additionally, the invention may optionally utilize the time base required for frequency hopping or spread spectrum communications as the basis for these higher powered tasks.

Abstract: The disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). In a wireless communication system, a base station apparatus may include at least one transceiver, and at least one processor operatively coupled with the at least one transceiver. The at least one transceiver may transmit, to a terminal, configuration information associated with a primary beam and a secondary beam. The processor may determine the primary beam and the secondary beam based on feedback information regarding beams of the base station, received from the terminal.

Abstract: A power transfer device includes an oscillator circuit having a first node, a second node, and a control terminal. The oscillator circuit includes a cascode circuit comprising transistors having a first conductivity type and a first breakdown voltage. The cascode circuit is coupled to the control terminal, the first node, and the second node. The oscillator circuit includes a latch circuit coupled between the cascode circuit and a first power supply node. The latch circuit includes cross-coupled transistors having the first conductivity type and a second breakdown voltage. The first breakdown voltage is greater than the second breakdown voltage. The oscillator circuit may be configured to develop a pseudo-differential signal on the first node and the second node. The pseudo-differential signal may have a peak voltage of at least three times a voltage level of an input DC signal on a second power supply node.

Abstract: A multilayer electronic component includes: a multilayer stack including a plurality of dielectric layers and a plurality of conductor layers stacked together; a plurality of terminals integrated with the multilayer stack; and a shield formed of a conductor and integrated with the multilayer stack. The multilayer stack has a top surface, a bottom surface, and four side surfaces connecting the top surface and the bottom surface. The plurality of terminals are provided on the bottom surface of the multilayer stack. The shield entirely covers the top surface and the four side surfaces of the multilayer stack. The shield includes a portion that is thicker than the other portions of the shield.

Abstract: A contactless power feeding apparatus includes a fixed electrode device and a movable electrode device that is movable with respect to the fixed electrode device, and the fixed electrode device and the movable electrode device can exchange electric power through electric field coupling. The fixed electrode device includes at least one fixed electrode plate extending in a longitudinal direction. The movable electrode device is movable along the fixed electrode plate in the longitudinal direction, and includes at least one movable electrode unit that is movable in the thickness direction of the fixed electrode plate. The movable electrode unit includes a pair of movable electrode plates opposed to both respective side faces of the fixed electrode plate, and a spacer member that holds the distance between the pair of movable electrode plates constant and brings the pair of movable electrode plates into conduction.

Abstract: Phase control for carrier aggregation. In some embodiments, a carrier aggregation circuit can include a first filter configured to allow operation in a first frequency band, and a second filter configured to allow operation in a second frequency band. The circuit can further include a first path implemented between the first filter and a common node, with the first path being configured to provide a substantially matched impedance for the first frequency band and a substantially open-circuit impedance for the second frequency band. The circuit can further include a second path implemented between the second filter and the common node, with the second path being configured to provide a substantially matched impedance for the second frequency band and a substantially open-circuit impedance for the first frequency band.

Abstract: The present invention discloses a method and a system for discovering a neighbouring network by an already operational network. The networks comprise a control channel (CCH) and a data channel (DCH), both comprising a beacon to be transmitted, respectively. The channels are predetermined and beacon formats of theft control channels (CCH) are known, and an inter-beacon-interval of the data channel (DCH) of the already operational network comprises an active period followed by an inactive period. The present invention is characterized in that the temporal lengths of the inactive periods are changed in the data channel (DCH) of the already operational network. Furthermore, the method is configured to search for a beacon of a predetermined control channel (CCH) of a neighbouring network during subsequent inactive periods of the already operational network.

Abstract: The present invention relates to a method for receiving a downlink signal at a terminal in a wireless communication system. In particular, the method comprises: receiving a control channel to be transmitted to a specific subframe via a first carrier; and decoding a data channel corresponding to the control channel to be transmitted to the specific subframe via a second carrier, using at least one parameter included in the control channel, wherein information on the orthogonal frequency division multiplexing (OFDM) start symbol of data channels that are transmitted via each of at least one carrier allocated to the terminal is signaled through an upper layer.

Abstract: Generally, this disclosure provides systems and methods for distributed phased array multiple input multiple output (DPA-MIMO) communications.

Abstract: Disclosed herein are silicon-on-insulator (SOI) switches and associated control circuits having level shifters configured to provide increased voltages (positive and/or negative) to the switches. The disclosed level shifters can be configured to provide increased voltages and can be used with high-linearity switches and/or can improve the linearity of switches. The improved switch performance can improve front end module performance for applications such as carrier aggregation (CA) and multiple input multiple output (MIMO) as well as with protocols such as Long-Term Evolution Advanced (or LTE-A).

Abstract: A device includes a baseband circuit that generates a first digital signal, a digital-to-analog converter (DAC) that converts the first digital signal into a baseband signal, a first mixer that generates a first mixed signal based on the baseband signal and a first reference signal, a second mixer that generates a second mixed signal based on the baseband signal and a second reference signal, a third mixer that generates a down-converted signal based on the first mixed signal and the second mixed signal, and an analog-to-digital converter (ADC) that converts the down-converted signal into a second digital signal. The frequency of the first reference signal is different from the frequency of the second reference signal.

Abstract: A phase shifter module includes a base material, a common terminal, and individual terminals, the common terminal and the individual terminals being provided at the base material. Inside the base material, phase shifters that are connected between the individual terminals and the common terminal, respectively, are provided. The phase shifters each include a primary coil and a secondary coil that is coupled to the primary coil by magnetic field coupling and define a transformer phase shifter. With this configuration, a phase shifter module for use with SAW filters while reducing or preventing interference among the SAW filters, a multiplexer/demultiplexer that includes the phase shifter module, and a communication apparatus that includes the phase shifter module, are obtained.

Abstract: A load control system for controlling the amount of power delivered from an AC power source to a plurality of electrical load includes a plurality of energy controllers. Each energy controller is operable to control at least one of the electrical loads. The load control system also includes a first broadcast controller that has a first antenna and a second antenna. The first antenna is arranged in a first position and the second antenna is arranged in a second position that is orthogonal to the first position. The broadcast controller is operable to transmit a first wireless signal via the first antenna and a second wireless signal via the second antenna. Each of the energy controllers is operable to receive at least one of the first and second wireless signals, and to control the respective load in response to the received wireless signal.

Abstract: In a handheld communication device capable of a plurality of wireless communication modes, a method of communication begins by receiving, at the handheld communication device, a notification of an available one of the wireless communication modes. Then, in a data communication window of the communication device, a user-indication of an active one of the available wireless communication modes is provided in accordance with the received communication mode indication. The data communication window is configured to facilitate data communication via the plurality of wireless communication modes, and facilitates the data communication via the active wireless communication mode.

Abstract: Various semiconductor chip devices and methods of manufacturing the same are disclosed. In one aspect, a semiconductor chip device is provided that has a reconstituted semiconductor chip package that includes an interposer that has a first side and a second and opposite side and a metallization stack on the first side, a first semiconductor chip on the metallization stack and at least partially encased by a dielectric layer on the metallization stack, and plural semiconductor chips positioned over and at least partially laterally overlapping the first semiconductor chip.

Abstract: Provided is a beam transmission/reception method, which is executed in a wireless communication system in which a terminal and a base station are configured to use a beam to communicate to and from each other. The beam transmission/reception method includes a first step of setting, by the base station, when receiving a random access signal transmitted by the terminal as a connection request, a beam direction group at a time of reception of the random access signal by adding a further outer beam direction to beam directions used at a time of transmission of a notification signal for measuring a signal before the reception.

Abstract: Method and apparatus for determining a modulation scheme in direct link-based communication. A method implemented in a transmitting (TX) terminal device is provided. According to the method, a link quality of a direct link for transmission of information from the TX terminal device to one or more receiving (RX) terminal devices is determined based on one or more of the following: a context of the TX terminal device, or one or more reference signal received qualities (RSRQs) from the one or more RX terminal devices. A modulation scheme for modulating the information is determined based on the link quality. The information is modulated with the determined modulation scheme and the modulated information is transmitted to the one or more RX terminal devices via the direct link.

Abstract: A multi-amplifier power management circuit and related apparatus are provided. The multi-amplifier power management circuit includes a transceiver circuit and an amplifier circuit, which are physically separated (e.g., in different integrated circuits). The amplifier circuit receives a radio frequency (RF) signal from the transceiver circuit and splits the RF signal into a number of RF transmit signals. The amplifier circuit includes a number of amplifiers configured to amplify the RF transmit signals. In examples discussed herein, the multi-amplifier power management circuit can be provided in an apparatus (e.g., a mobile communication device). The amplifier circuit may be collocated with a number of transmit antennas closer to an edge(s) of the apparatus. By collocating the amplifier circuit and the transmit antennas closer to the edge(s) of the apparatus, it may be possible to reduce RF signal radiation distance, thus helping to improve radiation efficiency and reduce heat dissipation in the apparatus.

Abstract: An apparatus and method for selecting the best beam in a wireless communication system are provided. An operation of a Base Station (BS) includes repeatedly transmitting reference signals beamformed with a first width, receiving a feedback signal indicating at least one preferred-beam having the first width from at least one terminal, determining a direction range within which reference signals beamformed with a second width are to be transmitted and a transmission pattern, based on the at least one preferred-beam having the first width, repeatedly transmitting the reference signals beamformed with the second width within the determined direction range according to the transmission pattern, and receiving a feedback signal indicating at least one preferred-beam having the second width from the at least one terminal.

Abstract: Methods and systems are provided for dynamically delaying a calibration of an antenna. It is determined that there is a quantity of user devices above a predetermined threshold on a particular sector of an antenna associated with the base station, or that there is a quantity of user devices above a predetermined threshold in an MU-MIMO group on the particular sector of the antenna. Further, it is determined that there is an upcoming scheduled calibration event of the antenna, and based on the upcoming scheduled calibration event and the occurrence, the upcoming scheduled calibration event of the antenna is delayed or postponed.

Abstract: An envelope tracking (ET) amplifier apparatus is provided. The ET amplifier apparatus includes a number of amplifier circuits that can be activated concurrently or selectively for amplifying a number of radio frequency (RF) signals. Notably, some amplifier circuits may amplify RF signals corresponding to a higher modulation bandwidth (e.g., >80 MHz), while other amplifier circuits may amplify RF signals corresponding to a lower modulation bandwidth (e.g., <40 MHz). In examples discussed herein, the ET amplifier apparatus can be flexibly configured to the amplifier circuits, either concurrently or selectively, to amplify the RF signals corresponding to a wide range of modulation bandwidths, without compromising linearity and efficiency of the amplifier circuits. Moreover, the ET amplifier apparatus may be configured to share a common circuit(s) among a number of circuits, thus helping to reduce footprint of the ET amplifier apparatus.

Abstract: Systems and methods for securing orthogonal frequency division multiplexing (OFDM) transmission of data are discussed herein. Computing devices can sense the signal strength of frequencies on an OFDM wireless channel. The computing device can determine which of the frequencies are fading frequencies failing below a threshold. A transmitting computing device can send artificial data on the failing frequencies and genuine data on the remaining frequencies. Artificial data can be designed to mitigate peak-average-power ratio (PAPR) to have an additional benefit without using extra resource.

Abstract: Various wireless communication methods are provided for controlling two or more wireless devices. In one embodiment, various processes optimize the wireless communication, especially when multiple devices are present in a system or a network. In another embodiment, various controlling devices are accommodated in a network of devices at different points in time. The speed at which the new controlling device comes into a range of the networked devices is improved with existing signatures of different wireless protocols or devices present in the network. In another embodiment, a change in the signal strength of a wireless device can be used to detect an object or person, such as an intruder.

Abstract: An RF tag circuit connected to an antenna and a load is provided. The RF tag circuit includes: a rectification circuit rectifying a radio wave received by the antenna and supplying DC power; a matching circuit having a changeable impedance and disposed between the antenna and the rectification circuit; a control part repeatedly controlling activation and stopping of the load; and an adjustment part changing the impedance of the matching circuit in a predetermined direction, storing a first electric power generated by the rectification circuit when a predetermined time has elapsed after the load is activated, and changing the impedance of the matching circuit based on a magnitude relationship between a second electric power generated by the rectification circuit when the predetermined time has elapsed after the load is activated at a timing after the first electric power is generated and the stored first electric power.

Abstract: An RF tag that includes a limiter and is capable of satisfactorily adjusting an impedance of a matching circuit is provided. The RF tag includes a variable load unit of which an amount of power consumption is changeable and a control unit that is capable of executing an impedance adjusting process of adjusting the impedance of the matching circuit such that an output voltage of a rectification circuit becomes a maximum and executes the impedance adjusting process after reducing the output voltage of the rectification circuit to a voltage less than a limiter voltage by adjusting the amount of power consumption of the variable load unit when a predetermined condition is satisfied.

Abstract: Fabrication of radio-frequency (RF) devices involves providing a field-effect transistor (FET), forming one or more electrical connections to the FET, forming one or more dielectric layers over at least a portion of the electrical connections, and disposing an electrical element over the one or more dielectric layers, the electrical element being in electrical communication with the FET via the one or more electrical connections. RF device fabrication further involves covering at least a portion of the electrical element with a sacrificial material, applying an interface material over the one or more dielectric layers, the interface material at least partially covering the sacrificial material, and removing at least a portion of the sacrificial material to form a cavity at least partially covered by the interface layer.

Abstract: Disclosed herein are examples of wireless charging transmitters and methods. As one example, a wireless charging transmitter includes a sensor to detect the presence of a receiver device and/or a living being and the sensor generates data according to the presence detected. The wireless charging transmitter also includes an array of antennas configured to transmit power waves to the receiver device and a surface layer that is adjacent to the array of antennas. The transmitted power waves converge to form a constructive interference pattern at a non-zero distance from the surface layer. The non-zero distance being based on the sensor data. Further, the phases and amplitudes of the transmitted power waves are determined based, at least in part, on the sensor data.

Abstract: The present disclosure describes apparatuses and methods for a configurable wireless communication chip. In some aspects, a wireless communication chip includes multiple radio paths and is capable of operating in a first communication mode that supports communication in non-contiguous segments of bandwidth and a second communication mode that does not support communication in non-contiguous segments of bandwidth. Based on a hardware configuration external to the wireless communication chip, the radio paths can be configured to operate in the first communication mode or the second communication mode. In some cases, the hardware configuration external to the wireless communication chip includes fewer antennas or amplifier paths than radio paths of the chip, such as due to cost or form-factor considerations.