Abstract: A temperature controlled phase compensation circuit may include a varactor coupled between a radio frequency (RF) transmission line and a node. A temperature controlled phase compensation circuit may include a resistance coupled between a voltage supply and the node, the voltage supply configured to supply a supply voltage. A temperature controlled phase compensation circuit may include a temperature controlled current source coupled to the node and configured to produce a capacitor voltage between the varactor and the resistance, wherein a capacitor voltage produced at the node and applied to the varactor is inversely related to temperature.

Abstract: A method for assigning unique identifiers is disclosed. The method includes: obtaining a daisy-chain identifier update command set transmitted over a serial communication interface to a chain of serially connected worker modules (WMs). The chain of serially connected WMs comprises a first WM, a second WM, and a third WM. The method includes: enabling updating a first WM identifier associated with the first WM, disabling updating a second unique identifier associated with the second WM, obtaining a first identifier update value transmitted over the serial communication interface to the chain of serially connected WMs, updating the first WM identifier of the first WM based on the first identifier update value, obtaining a second identifier update value transmitted over the serial communication interface, enabling updating the second unique identifier associated with the second WM, and updating the second WM identifier based on the second identifier update value.

Abstract: Systems and techniques for detecting connection failures for serially connected worker modules (WMs) are disclosed. A method for detecting connection failures for serially connected WMs includes driving a chip select (CS) signal at a known voltage level to a first IO port of a first WM of a chain of serially connected WMs, propagating the CS signal to a second IO port of the first WM, wherein the second IO port of the first WM is configured to be coupled to a first IO port of a second WM of the chain of serially connected WMs, and determining, based on detecting that a signal at a voltage level different than the known voltage level is present at the first IO port of the second WM, that a connection failure is present between the first WM and the second WM.

Abstract: A phased array antenna system may include a measurement network. A phased array antenna system may include a first digital beamformer (DBF) coupled to the measurement network and configured to transmit a first radio frequency (RF) calibration signal onto the measurement network. A phased array antenna system may include a second DBF coupled to the measurement network and configured to receive a first RF signal, derived from the first RF calibration signal, from the measurement network, the second DBF comprising a processor configured to: compute, based on the first RF signal, a phase difference between the first RF signal and a second RF signal; and compute a phase compensation to be applied by at least one of the first DBF or the second DBF based on the phase difference.

Abstract: Systems and techniques for beam-to-beam (B2B) coupling cancellation are disclosed. In one example, a process includes obtaining, at a first FE of a serially fed FE network, a first RF signal and a second RF signal; outputting, from the first FE, a first through path RF signal based on the first RF signal and a second through path RF signal based on the second RF signal; obtaining, at a second FE of the serially fed FE network, the first through path RF signal and the second through path RF signal; and applying one or more phase shifts to the first RF signal, the second RF signal, the first through path RF signal, or the second through path RF signal to at least partially cancel the coupling component associated with the cross-coupling between the first signal path of the first FE and the second signal path of the first FE.

Abstract: Systems and techniques for coupling cancellation are disclosed. A method includes obtaining, at a first individual FE of a serially fed FE network, an RF signal; transmitting the RF signal from a first antenna element coupled to the first individual FE; transmitting a through path RF signal associated with the RF signal to a second individual FE of the serially fed FE network; transmitting the through path RF signal from a second antenna element coupled to the second individual FE; and cancelling a feedback component associated with transmission of the RF signal from the first antenna element with a feedback component associated with transmission of the through path RF signal from the second antenna element or cancelling a feedforward component associated with transmission of the RF signal from the first antenna element with a feedforward component associated with transmission of the through path RF signal from the second antenna element.

Abstract: A phased array antenna system is provided. The phased array antenna system includes: a beamformer (BF) module comprising an antenna port coupled to an antenna element. The BF module includes first, second, and third radio frequency (RF) ports. The first and third RF ports are configured as a first differential signal pair and the second and third RF ports are configured as a second differential signal pair. The first RF port corresponds to a first RF signal and the second RF port corresponds to a second RF signal, different from the first RF signal.

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

Abstract: Systems and techniques for distributing reference signals are disclosed. For example, a method includes generating, by a first phase-locked loop (PLL) included in a first beamformer (BF) chip, a first local oscillator (LO) signal; generating, by a second PLL included in a second BF chip, a second LO signal; and in a first BF configuration, transmitting radio frequency (RF) signals by a plurality of antenna elements based on the first LO signal. A first subset of the plurality of the antenna elements is associated with the first BF chip and a second subset of the plurality of antenna elements is associated with the second BF chip. The method includes, in a second BF configuration, receiving RF signals by the first subset of the plurality of antenna elements and the second subset of the plurality of antenna elements based on the second LO signal.

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: 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.