Abstract: A serially fed front end (FE) network is provided. The serially fed FE network includes a first FE comprising a first FE input/output (IO), a second FE IO, and a first antenna IO coupled to a first antenna element of a plurality of antenna elements. The first FE IO of the first FE is electrically coupled to a particular beamformer (BF) IO of a BF. The serially fed FE network includes a second FE comprising a first FE IO coupled to the second FE IO of the first FE, a second FE IO of the second FE, and a second antenna IO coupled to a second antenna element of the plurality of antenna elements. The BF is communicatively coupled by the serially fed FE network to transmit to and/or receive signals from the first and second antenna elements of the plurality of antenna elements.

Abstract: Systems and Techniques are provided for a radio frequency input/output (RFIO) circuit. An example RFIO circuit can include an a receive (Rx) path comprising a low noise amplifier (LNA). The example RFIO circuit can include a transmit (Tx) path comprising a power amplifier (PA). The example RFIO circuit can include a balun configured to RF couple an RFIO terminal to the Rx path or to the Tx path. The one or more selection components are configured to selectively enable the Rx path or the Tx path.

Abstract: Systems, methods, and computer-readable media are provided for hybrid beamforming. An example method can include determining a plurality of digital beamforming weights associated with a plurality of digital beamforming paths between digital beamformers and groups of analog beamforming circuits in a phased array antenna, each digital beamforming path being coupled to a group of analog beamforming circuits and each analog beamforming circuit being coupled to a respective set of antenna elements of the phased array antenna, and determining analog beamforming weights associated with the groups of analog beamforming circuits. The analog beamforming weights are estimated to put analog beamforming paths associated with the groups of analog beamforming circuits in a desired phase and gain relationship with each other.

Abstract: Technologies for provided for a radio frequency input/output (RFIO) combiner/splitter. An example combiner/splitter can include an RFIO circuit including a receive path including first and second low noise amplifiers (LNAs), first switches, resistors, and capacitors, each of the first switches being in series with a respective one of the first capacitors and first resistors; a transmit path including a first power amplifier (PA) including second switches coupled to second resistors and third switches coupled to third resistors, and a second PA including fourth switches coupled to fourth resistors and fifth switches coupled to fifth resistors, each of the second switches, the third switches, the fourth switches, and the fifth switches being in series with one or more respective ones of the second resistors, the third resistors, the fourth resistors, and the fifth resistors; and a balun that couples the Rx and Tx path to an RFIO terminal.

Abstract: Systems, methods, and computer-readable media are provided for hybrid beamforming.

Abstract: Systems, methods, and non-transitory media are provided for cross-coupling modeling and compensation.

Abstract: Systems, methods, and non-transitory media are provided for cross-coupling modeling and compensation. An example method can include determining one or more cross-coupling coefficients representing electrical cross-coupling within a component of a phased array antenna, wherein the component of the phased array antenna includes one or more signal paths between one or more beamformers of the phased array antenna and a set of antenna elements of the phased array antenna; based on the one or more cross-coupling coefficients, modifying one or more beamforming weights calculated for one or more signals routed via the one or more signal paths, wherein the modified one or more beamforming weights compensate for the electrical cross-coupling effect within the component of the phased array antenna; and applying, by the one or more beamformers, the modified one or more beamforming weights to the one or more signals routed via the one or more signal paths.

Abstract: Systems, methods, and computer-readable media are provided for hybrid beamforming.

Abstract: Technologies for provided for a radio frequency input/output (RFIO) combiner/splitter. An example combiner/splitter can include an RFIO circuit including a receive path including first and second low noise amplifiers (LNAs), first switches, resistors, and capacitors, each of the first switches being in series with a respective one of the first capacitors and first resistors; a transmit path including a first power amplifier (PA) including second switches coupled to second resistors and third switches coupled to third resistors, and a second PA including fourth switches coupled to fourth resistors and fifth switches coupled to fifth resistors, each of the second switches, the third switches, the fourth switches, and the fifth switches being in series with one or more respective ones of the second resistors, the third resistors, the fourth resistors, and the fifth resistors; and a balun that couples the Rx and Tx path to an RFIO terminal.

Abstract: Front-end analog circuitry is described based on a sink-regulated H-bridge topology for delivery of biphasic stimulus signals that may be useful in neurostimulation. Stimulus current may be supplied using fully-integrated dynamic voltage supplies (DVSs), which may be controlled in closed-loop to have an output voltage approximately equal to the voltage of the electrode each supplies stimulus to. The stimulus waveform may be regulated by a single, low-voltage current-digital-to-analog converter (current-DAC), which can safely interface with the electrodes (which may be at high voltages) via high-voltage adapter (HVA) circuits. Example analog front-end circuitry may utilize the balancing stimulus current to discharge the electrode-tissue interface impedance (ZE). In some examples, only after full (or sufficient) ZE discharge has been detected is a DVS used to supply the remaining balancing stimulus.

Abstract: Front-end analog circuitry is described based on a sink-regulated H-bridge topology for delivery of biphasic stimulus signals that may be useful in neurostimulation. Stimulus current may be supplied using fully-integrated dynamic voltage supplies (DVSs), which may be controlled in closed-loop to have an output voltage approximately equal to the voltage of the electrode each supplies stimulus to. The stimulus waveform may be regulated by a single, low-voltage current-digital-to-analog converter (current-DAC), which can safely interface with the electrodes (which may be at high voltages) via high-voltage adapter (HVA) circuits. Example analog front-end circuitry may utilize the balancing stimulus current to discharge the electrode-tissue interface impedance (ZE). In some examples, only after full (or sufficient) ZE discharge has been detected is a DVS used to supply the remaining balancing stimulus.

Abstract: Meditation enhancement box is made of brass or copper, with magnets bonded to each corner and boading ball. The box can be a cube of about 5.08 cm. All magnets are pointed to center of box using a same polarity, and chime sound is produced during usage. Method for using box for meditation as follows: box rests in middle of palm in one hand, feeling weight of box and moving hand slowly clockwise and counterclockwise in circles, and vertical circles, initiating rhythmic breathing while moving hand; upon reaching relaxed state, index finger is placed on top of box and moving from middle towards edge of box in circles; turning over box to one adjacent side in a direction using free hand, followed by breathing in and out for 10 to 15 seconds while rotating the box in one adjacent side, and followed by rotating in another adjacent side, respectively.