Space Exploration Technologies Corp.

University of Washington

Eric Pepin

Kim Willi Schulze

Amir Agah

Javier Rodriguez De Luis

Ersin Yetisir

Philippe Riondet

Dean A De Carli

Jacques Christophe Rudell

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 between a first signal path through a component and a second signal path through the component; based on the one or more cross-coupling coefficients, determining a first modified beamforming weight for a first signal associated with the first signal path through the component and a second modified beamforming weight for a second signal associated with the second signal path through the component, wherein the first and second modified beamforming weights compensate for the electrical cross-coupling between the first signal path through the component and the second signal path through the component; applying the first modified beamforming weight to the first signal associated with the first signal path; and applying the second modified beamforming weight to the second signal associated with the second signal path.

Cross-coupling modeling and compensation for antenna apparatus

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. The method can include varying, based at least partly on the analog beamforming weights, a signal phase shift across the analog beamforming paths associated with the groups of analog beamforming circuits.

Systems and methods for beamforming in hybrid beamforming antennas

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.

Compact radio frequency combiner

Systems, methods, and computer-readable media are provided for hybrid beamforming. An example method can include determining 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; determining analog beamforming weights associated with the groups of analog beamforming circuits, the analog beamforming weights comprising inverses of the digital beamforming weights; determining calibration offsets estimated to put analog beamforming paths associated with the groups of analog beamforming circuits in a desired phase and gain relationship to each other; and varying, based at least partly on the calibration offsets, a signal phase shift across the analog beamforming paths associated with the groups of analog beamforming circuits.

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.

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 (Z). In some examples, only after full (or sufficient) Zdischarge has been detected is a DVS used to supply the remaining balancing stimulus.

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Seattle, WA, United States of America

Eric Pepin