Abstract: Embodiments disclosed herein may generate and transmit power waves that, as result of their physical waveform characteristics (e.g., frequency, amplitude, phase, gain, direction), converge at a predetermined location in a transmission field to generate a pocket of energy. Receivers associated with an electronic device being powered by the wireless charging system, may extract energy from these pockets of energy and then convert that energy into usable electric power for the electronic device associated with a receiver. The pockets of energy may manifest as a three-dimensional field (e.g., transmission field) where energy may be harvested by a receiver positioned within or nearby the pocket of energy.

Abstract: A method of wireless power transmission is provided. The method includes, at a wireless power transmitter, receiving a signal from a receiver device and determining a location of the receiver device based, at least in part, on data included in the signal. The method further includes in response to determining that the location of the receiver device is within a wireless power transmission range of the wireless power transmitter: (I) selecting at least two antennas of the wireless power transmitter's antenna array based, at least in part, on the location of the receiver device, and (II) transmitting, via the at least two antennas of the antenna array, radio frequency power transmission waves that: (i) constructively interfere at the location of the receiver device to produce a focused energy at the location and (ii) destructively interfere around the location of the receiver device to form null-spaces around the focused energy.

Abstract: A wireless-power receiver is disclosed including a first antenna configured to transmit first near-field radio frequency (RF) energy, a second antenna configured to receive second near-field RF energy, and a communications component configured to provide a communication signal including data indicating a location of the first wireless-power receiver. The wireless-power receiver is configured to, in accordance with a determination that the wireless-power receiver is in direct contact with a surface of another wireless-power receiver, transmit the first near-field RF energy, via the first antenna, to the other receiver.

Abstract: Embodiments disclosed herein describe a wireless power receiver including a synchronous rectifier using a Class-E or a Class-F amplifier. The voltage waveform generated from a power source, for example an antenna, is tapped to create a feed-forward tap-line to provide a gate voltage to the transistor of the Class-E or the Class-F amplifier. In some instances, a constant phase shift across the feed-forward tap-line may be provided using a micro-strip of a predetermined length that is selected such that the transistor switches at the zero-crossings of the voltage waveform arriving at the drain terminal of the transmitter. In other instances, a feed-forward circuit is used for controlling the phase across the feed-forward loop.

Abstract: Methods and systems for monitoring blood pressure in a person are disclosed. A method for monitoring a blood pressure in a person involves transmitting millimeter range radio waves over a three-dimensional (3D) space below the skin surface of a person, receiving radio waves on multiple receive antennas, the received radio waves including a reflected portion of the transmitted radio waves that is reflected by blood in a blood vessel in the 3D space, isolating a signal that corresponds to the portion of the transmitted radio waves that is reflected by blood in the blood vessel in response to receiving the radio waves on the multiple receive antennas, and outputting a signal that corresponds to a blood pressure level in the person in response to the isolated signal.

Abstract: Methods for training a model for use in monitoring a health parameter in a person are disclosed. In an embodiment, a method involves monitoring a blood pressure of a person using a control blood pressure monitoring system, receiving control data that corresponds to the monitoring using the control blood pressure monitoring system, receiving stepped frequency scanning data that corresponds to radio waves that have reflected from blood in a blood vessel of the person, wherein the stepped frequency scanning data is collected through multiple receive antennas over a range of frequencies, generating training data by combining the control data with the stepped frequency scanning data in a time synchronous manner, and training a model using the training data to produce a trained model, wherein the trained model correlates stepped frequency scanning data to values that are indicative of a blood pressure of a person.

Abstract: A method for operating a removable smartphone case is disclosed. The method involves transmitting radio waves below the skin surface of a person, receiving radio waves on a two-dimensional array of receive antennas, the received radio waves including a reflected portion of the transmitted radio waves, generating digital data in response to the received radio waves, wherein the digital data is indicative of a health parameter of the person, and communicating the digital data generated in response to the received radio waves from the removable smartphone case to a smartphone that is connected to the removable smartphone case.

Abstract: Devices, systems, and methods for multi-band radar sensing are disclosed. A method for operating an IC device involves setting a configuration of the IC device to select from available options of low-band and high-band operational modes, transmitting and receiving RF signals at a low-band frequency when the configuration of the IC device is set to the low-band operational mode, and transmitting and receiving RF signals at a high-band frequency when the configuration of the IC device is set to the high-band operational mode, wherein transmitting RF signals at the high-band frequency comprises upconverting a first signal at the low-band frequency to a second signal at the high-band frequency and wherein receiving RF signals at the high-band frequency comprises downconverting a third signal at the high-band frequency to a fourth signal at the low-band frequency, wherein the upconversion and the downconversion are implemented using a conversion signal at a conversion frequency.

Abstract: A method for wireless charging of a game controller includes connecting a pocket-forming transmitter to a power source; generating sound waves from a sound circuit embedded within the transmitter; controlling the generated sound waves with a digital signal processor in the transmitter; transmitting the sound waves through antenna elements connected to the transmitter to a receiver configured to capture the sound waves forming a pocket of energy in 3-D space at the receiver with antenna elements connected to the game controller; and converting, by a plurality of sensor elements included in the receiver, the pocket of energy into a DC voltage for charging or powering a battery of the gamer controller. A respective one of the plurality of sensor elements produces an electrical analog output signal proportional to the controlled sound waves captured.

Abstract: A removable smartphone case is disclosed. The removable smartphone case includes a case body configured to receive a smartphone, a radio frequency (RF) front-end connected to the case body and including a semiconductor substrate and an antenna array including at least one transmit antenna configured to transmit radio waves below the skin surface of a person and a two-dimensional array of receive antennas configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves, wherein the semiconductor substrate includes circuits configured to generate signals in response to the received radio waves, wherein the signals correspond to an alignment of the antenna array relative to a vein below the skin surface of the person, and a communications interface configured to transmit digital data that corresponds to the signals generated by the semiconductor substrate from the removable smartphone case.

Abstract: The wireless power receiver includes at least one wire of a sound-producing device. The at least one wire configured for both conveying sound signals or securing at least part of the sound-producing device to a user, and receiving power waves. The wireless power receiver also includes power harvesting circuitry coupled with the at least one wire and a power source of an electronic device, like a battery. The power harvesting circuitry is configured to isolate the received power waves from the conveyed sound signals, convert the received power waves to usable energy, and provide the usable energy to the power source of the electronic device.

Abstract: A system for wireless-power transmission includes a radio-frequency wireless-power transmitter that is in communication with a sensor for acquiring data for motion recognition and tracking of a plurality of objects within at least a portion of a transmission field of the radio-frequency wireless-power transmitter; and one or more processors of the radio-frequency wireless-power transmitter configured to: detect location and displacement of an object of the plurality of objects within the transmission field; and send instructions to cause adjustments to transmission of one or more radio-frequency power-transmission waves by the radio-frequency wireless-power transmitter to a receiving electronic device based on the location and displacement of the object. The receiving electronic device is configured to use energy from the one or more radio-frequency power-transmission waves to (i) power the receiving electronic device and/or (ii) to charge a power source of the receiving electronic device.

Abstract: Systems and methods for configuring delivery systems are disclosed herein. An example method includes (i) receiving a user-configured operational parameter that includes information identifying a plurality of electronic devices authorized to receive power transmission signals from a wireless power transmitter and (ii) detecting an electronic device within wireless power transmission range of the transmitter.

Abstract: Embodiments disclosed herein may generate and transmit power waves that, as result of their physical waveform characteristics (e.g., frequency, amplitude, phase, gain, direction), converge at a predetermined location in a transmission field to generate a pocket of energy. Receivers associated with an electronic device being powered by the wireless charging system, may extract energy from these pockets of energy and then convert that energy into usable electric power for the electronic device associated with a receiver. The pockets of energy may manifest as a three-dimensional field (e.g., transmission field) where energy may be harvested by a receiver positioned within or nearby the pocket of energy.

Abstract: A wireless-power receiver is disclosed including a first antenna configured to transmit first near-field radio frequency (RF) energy, a second antenna configured to receive second near-field RF energy, and a communications component configured to provide a communication signal including data indicating a location of the first wireless-power receiver. The wireless-power receiver is configured to, in accordance with a determination that the wireless-power receiver is in direct contact with a surface of another wireless-power receiver, transmit the first near-field RF energy, via the first antenna, to the other receiver.

Abstract: Methods of constructing a wireless power receiver that uses a battery as an antenna are provided. The method includes power conversion circuitry that has a connector, the first end connected to at least a part of a battery, and the part of the battery is configured to act as an antenna and receive radio frequency (RF) power signals. The second end of the connector is opposite to the first end and connected to the power conversion circuitry. The power conversion circuitry converts the RF power signals into a direct current (DC) voltage that is used to charge the battery. Additional, some methods for constructing a wireless power receiver include a different connector between the power conversion circuitry and charging circuitry. The charging circuitry is electrically coupled with at least the part of the battery via another connector and provides DC voltage to charge the battery.

Abstract: A system for monitoring a health parameter in a person is disclosed. The system includes a frequency synthesizer configured to generate radio waves across a range of stepped frequencies, at least one transmit antenna configured to transmit the radio waves below the skin surface of a person, a two-dimensional array of receive antennas configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves, processing circuits configured to generate data that includes amplitude and phase data in response to the received radio waves, and means for determining a value that corresponds to a health parameter of the person in response to the amplitude and phase data.

Abstract: A method for monitoring a health parameter in a person is disclosed. The method involves transmitting radio waves below the skin surface of a person and across a range of stepped frequencies, receiving radio waves on a two-dimensional array of receive antennas, the received radio waves including a reflected portion of the transmitted radio waves across the range of stepped frequencies, generating data that corresponds to the received radio waves, wherein the data includes amplitude and phase data, deriving data from at least one of the amplitude and phase data, and determining a value that is indicative of a health parameter in the person in response to the derived data.

Abstract: A method for operating a health parameter monitoring system is disclosed. The method involves at a removable smartphone case that is connected to a smartphone, transmitting radio waves below the skin surface of a person, at the removable smartphone case, receiving radio waves at an antenna array that includes a two-dimensional array of receive antennas, the received radio waves including a reflected portion of the transmitted radio waves, communicating digital data generated in response to the received radio waves from the removable smartphone case to the smartphone, at the smartphone, determining an alignment of the antenna array relative to a vein in the person in response to the digital data received from the removable smartphone case, and at the smartphone, outputting an indicator of alignment from the smartphone in response to the determined alignment.

Abstract: A device for monitoring a health parameter of a person is disclosed. The device includes a semiconductor substrate including at least one transmit component and multiple receive components, at least one transmit antenna configured to transmit millimeter range radio waves over a 3D space below the skin surface of a person, and multiple receive antennas configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves, wherein the semiconductor substrate includes circuits for processing signals received on the multiple receive antennas, wherein the semiconductor substrate includes at least one output configured to output a signal that corresponds to a health parameter of a person in response to received radio waves, and wherein the at least one transmit antenna is collocated with the at least one transmit component and the multiple receive antennas are collocated with respective ones of the multiple receive components.