Abstract: An embodiment of a method for generating training data for use in monitoring a health parameter of a person is disclosed. The method involves receiving a pulse wave signal that is generated from radio frequency scanning data that corresponds to radio waves that have reflected from below the skin surface of a person, wherein the radio frequency scanning data is collected through a two-dimensional array of receive antennas of a wearable device over a range of radio frequencies, extracting features from at least one of the pulse wave signal and a mathematical model generated in response to the pulse wave signal, receiving control data from an optical sensor system of the wearable device, wherein the control data corresponds to a blood pressure of a person wearing the wearable device, and labeling the extracted features with a corresponding blood pressure of the control data to generate training data.

Abstract: A wearable device includes an optical sensor system configured to generate blood pressure data corresponding to a person wearing the wearable device, a backside RF sensor system having an RF front-end including at least one transmit antenna and a two-dimensional array of receive antennas, the RF front-end configured to perform radio frequency scanning across a frequency range, the radio frequency scanning performed using the at least one transmit antenna and the two-dimensional array of receive antennas, a processor configured to generate digital data in response to the radio frequency scanning and to coherently combine the generated digital data across the two-dimensional array of receive antennas and across the range of radio frequencies to produce a pulse wave signal of the person, and means for generating blood pressure values based on the blood pressure data from the optical sensor system and the pulse wave signal from the backside RF sensor system.

Abstract: An example wireless power transmitter includes a ground plate, a conductive wire offset from the ground plate, and a signal-conveyance member. The conductive wire of the wireless power transmitter forms a loop antenna that is configured to radiate a radio frequency (RF) signal for wirelessly powering a receiver device. And the signal-conveyance member of the wireless power transmitter is configured to selectively feed a waveform to a connection point of a plurality of connection points along the conductive wire, wherein the waveform, when provided to the conductive wire, causes the loop antenna to radiate the RF signal.

Abstract: Embodiments of the present technology may include a method for monitoring a health parameter of a person, the method including generating radio frequency scanning data that corresponds to radio waves that have reflected from features below the skin of a person. In some embodiments, the radio frequency scanning data is generated through a two-dimensional array of receive antennas over a range of radio frequencies. Embodiments may also include coherently combining the generated radio frequency scanning data across the two-dimensional array of receive antennas and across the range of radio frequencies to produce a pulse wave signal of the person. Embodiments may also include determining a value that is indicative of a blood glucose level in the person in response to the pulse wave signal.

Abstract: Embodiments of the present technology may include a radar system for a wearable health monitoring device, the radar system including a radio frequency (RF) front-end including at least one transmit antenna and a two-dimensional array of receive antennas, the RF front-end configured to perform radio frequency scanning across a frequency range, the radio frequency scanning performed using the at least one transmit antenna and the two-dimensional array of receive antennas, and a processor configured to generate digital data in response to the radio frequency scanning and to coherently combine the generated digital data across the two-dimensional array of receive antennas and across the range of radio frequencies to produce a pulse wave signal of the person, and to determine a value that is indicative of a blood glucose level in the person in response to the pulse wave signal.

Abstract: Embodiments of the present technology may include a radar system for a wearable health monitoring device, the radar system including a radio frequency (RF) front-end including at least one transmit antenna and a two-dimensional array of receive antennas, the RF front-end configured to perform stepped frequency scanning across a frequency range using frequency steps of a step size, the stepped frequency scanning performed using the at least one transmit antenna and the two-dimensional array of receive antennas. Embodiments may also include a processor configured to generate digital frequency control signals to control the stepped frequency scanning, to generate a pulse wave signal from signals received on the two-dimensional array of receive antennas, and to change a parameter of the stepped frequency scanning in response to the pulse wave signal.

Abstract: Embodiments of the present technology may include a method for monitoring a health parameter of a person, the method including receiving data that corresponds to a digital pulse wave signal that is generated from radio frequency data that corresponds to radio waves that have reflected from below the skin surface of a person. In some embodiments, the radio frequency data is collected through a two-dimensional array of receive antennas. Embodiments may also include determining a value that corresponds to a blood glucose level in the person in response to the data that corresponds to the digital pulse wave signal.

Abstract: Embodiments of the present technology may include a method for monitoring a health parameter of a person, the method including receiving a pulse wave signal that is generated from radio frequency scanning data that corresponds to radio waves that have reflected from below the skin surface of a person. In some embodiments, the radio frequency scanning data is collected through a two-dimensional array of receive antennas over a range of radio frequencies, extracting features from at least one of the pulse wave signal and a mathematical model generated in response to the pulse wave signal, applying the extracted features to a machine learning engine that includes a trained model, and outputting from the machine learning engine an indication of a health parameter of the person in response to the extracted features.

Abstract: Embodiments of the present technology may include a system for monitoring a physiological parameter in a person, the system including a frequency synthesizer configured to generate radio waves across a range of radio frequencies. Embodiments may also include at least one transmit antenna configured to transmit the radio waves below the skin surface of a person. Embodiments may also include 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. Embodiments may also include processing circuits configured to generate data in response to the received radio waves and to coherently combine the generated data across the two-dimensional array of receive antennas and across the range of radio frequencies to produce a pulse wave signal of the person.

Abstract: Embodiments of the present technology may include a system for monitoring a health parameter of a person, the system including an interface configured to receive data that corresponds to a digital pulse wave signal that is generated from radio frequency data and that corresponds to radio waves that have reflected from below the skin surface of a person. In some embodiments, the radio frequency data is collected through a two-dimensional array of receive antennas. Embodiments may also include a processor configured to determine a value that corresponds to a blood glucose level in the person in response to the data that corresponds to the digital pulse wave signal.

Abstract: Embodiments of the present technology may include a method for generating training data for use in monitoring a health parameter of a person, the method including receiving a pulse wave signal that is generated from radio frequency scanning data that corresponds to radio waves that have reflected from below the skin surface of a person. In some embodiments, the radio frequency scanning data is collected through a two-dimensional array of receive antennas over a range of radio frequencies. Embodiments may also include extracting features from at least one of the pulse wave signal and a mathematical model generated in response to the pulse wave signal. Embodiments may also include labeling the extracted features with a corresponding blood pressure to generate training data.

Abstract: Embodiments of the present technology may include a method for monitoring a physiological parameter in a person, the method including transmitting radio waves below the skin surface of a person and across a range of radio frequencies. Embodiments may also include 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 radio frequencies. Embodiments may also include generating data that corresponds to the received radio waves. Embodiments may also include coherently combining the generated data across the two-dimensional array of receive antennas and across the range of radio frequencies to produce a pulse wave signal of the person.

Abstract: Embodiments of the present technology may include a method for generating training data for use in monitoring a health parameter of a person, the method including receiving a pulse wave signal that is generated from radio frequency scanning data that corresponds to radio waves that have reflected from below the skin surface of a person. In some embodiments, the radio frequency scanning data is collected through a two-dimensional array of receive antennas over a range of radio frequencies. Embodiments may also include filtering at least one of the pulse wave signal and a mathematical model generated in response to the pulse wave signal with a lowpass filter to generate a filtered signal. Embodiments may also include labeling data corresponding to the filtered signal with a corresponding a blood glucose level to generate training data.

Abstract: Embodiments of the present technology may include a method for monitoring a physiological parameter in a person using a radar system, the method including generating a pulse wave signal from stepped frequency scanning data that corresponds to radio waves that have reflected from features below the skin of the person. In some embodiments, the stepped frequency scanning data is collected through stepped frequency scanning with a two-dimensional array of receive antennas over a range of stepped frequencies using frequency steps of a step size. Embodiments may also include changing a parameter of the stepped frequency scanning in response to the pulse wave signal. Embodiments may also include generating the pulse wave signal from stepped frequency scanning data using the changed parameter.

Abstract: Operating a stepped frequency radar system involves performing stepped frequency scanning across a frequency range using at least one transmit antenna and a two-dimensional array of receive antennas and using frequency steps of a fixed step size, processing a first portion of digital data that is generated from the stepped frequency scanning to produce a first digital output, wherein the first portion of the digital data is derived from frequency pulses that are separated by a first step size that is a multiple of the fixed step size, and processing a second portion of digital data that is generated from the stepped frequency scanning to produce a second digital output, wherein the second portion of the digital data is derived from frequency pulses that are separated by a second step size that is a multiple of the fixed step size, wherein the first multiple is different from the second multiple.

Abstract: Methods and systems for monitoring a health parameter in a person using a radar system are disclosed. A method involves performing stepped frequency scanning below the skin surface of a person using at least one transmit antenna and a two-dimensional array of receive antennas, the stepped frequency scanning being performed using frequency steps of a first step size, changing the first step size to a second different step size in response to a change in reflectivity of blood in a blood vessel of the person, performing stepped frequency scanning below the skin surface of the person using the second step size after the step size is changed from the first step size to the second step size, and outputting a signal that corresponds to a blood pressure level in the person in response to the stepped frequency scanning at the first step size and at the second step size.

Abstract: Devices, systems, and methods for multi-band radar sensing are disclosed. In an embodiment, an integrated circuit device includes transmit components and receive components, a low-band transmit interface connected to output a first signal at a low-band frequency, a high-band transmit interface connected to output a second signal at a high-band frequency, a low-band receive interface connected to receive a third signal at the low-band frequency, a high-band receive interface connected to receive a fourth signal at the high-band frequency, and mixers connected to upconvert the first signal at the low-band frequency to the second signal at the high-band frequency for transmission from the high-band transmit interface and to downconvert the fourth signal at the high-band frequency received at the high-band receive interface to a fifth signal at the low-band frequency, wherein the upconversion and the downconversion are implemented using a conversion signal at a conversion frequency.

Abstract: Systems and methods for wireless power transmission based on object identification are provided. A radio frequency wireless power transmitter is in communication with a video camera for capturing image data (e.g., a visual pattern) of at least a portion of a transmission field of the radio frequency wireless power transmitter. A processor of the radio frequency wireless power transmitter is configured to identify an object when the visual pattern matches a pre-stored visual pattern representing the object, and control transmission of one or more radio frequency power transmission waves to a receiving electronic device based on a location of the identified object, wherein the receiving electronic device uses the one or more radio frequency power transmission waves to power or to charge the receiving electronic device.

Abstract: Wireless charging systems, and methods of use thereof, are disclosed herein. As an example, a method includes: (i) receiving, by a communications radio of a wireless power transmitter, a communication signal from a communications radio of a wireless power receiver, (ii) determining a signal strength of the communication signal, (iii) determining whether the receiver device is within a proximity threshold from the transmitter based, at least in part, on the signal strength of the communication signal, and (iv) determining at least one waveform characteristic for wireless power transmission waves based, at least in part, on the signal strength of the communication signal. The method further includes, in response to determining that the receiver device is within the proximity threshold: activating one or more antennas of the plurality of antennas to transmit the wireless power transmission waves to the receiver device.

Abstract: Embodiments of wireless power receivers are disclosed herein. For example, a wireless power receiver comprises an antenna configured to: receive radio frequency (RF) waves from a transmitter; and convert energy from the RF waves into alternating current. The wireless power receiver also includes a rectifier coupled to the at least one antenna that rectifies the alternating current into a direct current; and a charger, coupled to the rectifier, the charger configured to: receive the direct current; and control, via circuitry that is coupled with the charger, distribution of current using conduction paths: (i) to a load, and (ii) to and from at least one storage element coupled with the charger. In some embodiments, the circuitry is configured to select the one of the conduction paths based on: a respective power requirement of the load, a respective power requirement of the at least one storage element, and the direct current.