Abstract: In an embodiment, an apparatus includes a first transmit path, a second transmit path, and a switch element. The first transmit path can provide a first radio frequency (RF) signal in accordance with a nominal specification. The second transmit path can provide a second RF signal in accordance with an intermittent specification, in which the first and second RF signals are within the same transmit band. The switch element can provide the first RF signal as a transmit mode output in a first state and provide the second RF signal as the transmit mode output in a second state.

Abstract: Aspects of this disclosure relate to efficient power amplifiers, such as class-F power amplifiers. A power amplifier transistor can provide an amplified RF signal. A termination can be coupled to an output of the power amplifier transistor and configured to provide a short circuit at a second harmonic. In some instances, the termination circuit can provide an open circuit at a third harmonic. A resonant circuit can be coupled to the output terminal of the power amplifier transistor and configured to provide an open circuit at the third harmonic. In certain embodiments, an input termination circuit coupled to an input terminal of the power amplifier transistor can provide a short circuit at the second harmonic. The power amplifiers of this disclosure can be implemented, for example, in envelope tracking applications.

Abstract: Radio frequency systems with transmit and receive isolation are provided. In certain configurations, a wireless device includes a power amplifier including a power amplifier output configured to provide a transmit signal, one or more duplexers including a first duplexer associated with a first frequency band, a plurality of antennas including a first antenna and a second antenna, a plurality of switches, and an isolation detection system. The plurality of switches are configured to selectively connect the power amplifier output to the first antenna via a selected path chosen from a plurality of signal paths, including a first signal path through the first duplexer and a duplexer bypass path that bypasses the one or more duplexers. Additionally, the isolation detection system is configured to control the selected path of the plurality of switches based on detecting an amount of antenna coupling between the first antenna and the second antenna.

Abstract: A radio frequency transmission arrangement comprises a ground plate (8) having first and second opposite sides and a boss protruding from said second side of the ground plate (8), a first transmission line comprising a first elongate conductor (1) passing from the first side of the ground plate through an aperture (3) in the ground plate and the boss, and a second transmission line comprising a second elongate conductor (2) and a ground plane (6), the first elongate conductor (1) passing through the ground plane (6) to connect to the second elongate conductor. The boss has an end surface (4) disposed in a substantially parallel relationship with the ground plane (6) of the second transmission line, and there is a gap between the end surface of the boss and the ground plane.

Abstract: Aspects of this disclosure relate to efficient power amplifiers, such as class-F power amplifiers. A power amplifier transistor can provide an amplified RF signal. A termination can be coupled to an output of the power amplifier transistor and configured to provide a short circuit at a second harmonic. In some instances, the termination circuit can provide an open circuit at a third harmonic. A resonant circuit can be coupled to the output terminal of the power amplifier transistor and configured to provide an open circuit at the third harmonic. In certain embodiments, an input termination circuit coupled to an input terminal of the power amplifier transistor can provide a short circuit at the second harmonic. The power amplifiers of this disclosure can be implemented, for example, in envelope tracking applications.

Abstract: Disclosed are systems and methods for improving isolation between transmit and receive radio-frequency (RF) signals. In some embodiments, a system can be implemented for isolating RF signals during Tx and Rx operations. The system can include a Tx path and an Rx path, with the Tx path having a filter. In some embodiments, the Tx path can include a power amplifier having a plurality of interstages and an output stage, and the filter can be implemented at one of the interstages and before the output stage. The system can further include first and second antennas connected respectively to the Tx and Rx paths. The Tx path, the Rx path, and/or the first and second antennas can be configured to yield a desired level of isolation between the RF signal in the Tx and Tx paths.

Abstract: A fastener installation tool for installing a fastener by gripping and drawing back a stem of the fastener comprises a hydraulic cylinder, and a hydraulic piston assembly located in the hydraulic cylinder for use in drawing back the stem of a fastener. The hydraulic piston assembly comprises an elongate draw part and a separate hollow piston part mounted on the elongate draw part such that the elongate draw part extends at least partly through the hollow piston part. The elongate draw part and the hollow piston part are formed from different materials.

Abstract: Systems, devices and methods related to stacked band selection switch devices. In some embodiments, an RF module can include a packaging substrate and a power amplifier (PA) assembly implemented on a PA die mounted on the packaging substrate. The RF module can further include an output matching network (OMN) device mounted on the packaging substrate and a band selection switch device mounted on the OMN device. The OMN device can be configured to provide output matching functionality for at least a portion of the PA assembly.

Abstract: A radio frequency transmission arrangement comprises a ground plate having an aperture comprising a slot with an elongate cross-section and substantially parallel sides, and a first and second transmission line. The thickness of the ground plate is greater than a width of the slot. The first transmission line comprises a first elongate conductor on a first side of the ground plate and has an end terminated with a first termination stub. The second transmission line comprises a second elongate conductor on the opposite side of the ground plate and has an end terminated with a second termination stub. The first transmission line is arranged to cross the slot at a point adjacent to the first termination stub, and the second transmission line is arranged to cross the slot at a point adjacent to the second termination stub.

Abstract: Circuits and methods for 2G amplification using 3G/4G linear path combination. In some embodiments, a front-end architecture can include a first amplification path and a second amplification path, with each being configured to amplify a 3G/4G signal, and the first amplification path including a phase shifting circuit. The front-end architecture can further include a splitter configured to receive a 2G signal and split the 2G signal into the first and second amplification paths, and a combiner configured to combine amplified 2G signals from the first and second amplification paths into a common output path. The front-end architecture can further include an impedance transformer implemented along the common output path to provide a desired impedance for the combined 2G signal.

Abstract: A method of mobilizing cells expressing the type 4 CXC chemokine receptor into the peripheral circulation by contacting them with an effective amount of a compound of formula (I) shown below (each variable in the formula being defined in the Specification): The method can be used to treat cancer and myocardial infarction.

Abstract: Systems, devices and methods related to improved radio-frequency (RF) modules. In some embodiments, an RF module can include a packaging substrate, a power amplifier (PA) assembly implemented on a first die mounted on the packaging substrate, and a controller circuit implemented on a second die mounted on the first die. The controller circuit can be configured to provide at least some control of the PA assembly. The RF module can further include one or more output matching network (OMN) devices mounted on the packaging substrate and configured to provide output matching functionality for the PA assembly. The RF module can further include a band selection switch device mounted on each OMN device.

Abstract: Uplink diversity and interband uplink carrier aggregation in front-end architecture. In some embodiments, a radio-frequency (RF) front-end architecture can include a first transmit/receive (Tx/Rx) front-end system configured to operate with a first antenna, and a second Tx/Rx front-end system configured to operate with a second antenna. The second Tx/Rx front-end system can be a substantial duplicate of the first Tx/Rx front-end system to provide, for example, uplink (UL) diversity functionality and UL multiple-input-and-multiple-output (MIMO) functionality.

Abstract: A fastener installation tool for installing a fastener by gripping and drawing back a stem of the fastener comprises a hydraulic cylinder, and a hydraulic piston assembly located in the hydraulic cylinder for use in drawing back the stem of a fastener. The hydraulic piston assembly comprises an elongate draw part and a separate hollow piston part mounted on the elongate draw part such that the elongate draw part extends at least partly through the hollow piston part. The elongate draw part and the hollow piston part are formed from different materials.

Abstract: A manually-actuated retention and release mechanism is disclosed for use with a blind threaded rivet setting tool. The mechanism has a cap with an internal screw thread which retains a drive screw immovably to a spindle such that axial or rotational movement of the spindle results in concomitant movement of the drive screw. The cap cooperates with a manually-actuable bar via series of serrations formed on the cap, each of which serrations is a latch point for the bar. Movement of the bar into or out of engagement with the serrations dictates whether or not the cap is locked in position.

Abstract: A method of mobilizing cells expressing the type 4 CXC chemokine receptor into the peripheral circulation by contacting them with an effective amount of a compound of formula (I) shown below (each variable in the formula being defined in the Specification): The method can be used to treat cancer and myocardial infarction.

Abstract: A radio frequency transmission arrangement comprises a ground plate (8) having first and second opposite sides and a boss protruding from said second side of the ground plate (8), a first transmission line comprising a first elongate conductor (1) passing from the first side of the ground plate through an aperture (3) in the ground plate and the boss, and a second transmission line comprising a second elongate conductor (2) and a ground plane (6), the first elongate conductor (1) passing through the ground plane (6) to connect to the second elongate conductor. The boss has an end surface (4) disposed in a substantially parallel relationship with the ground plane (6) of the second transmission line, and there is a gap between the end surface of the boss and the ground plane.

Abstract: In an embodiment, an apparatus includes a first transmit path, a second transmit path, and a switch element. The first transmit path can provide a first radio frequency (RF) signal in accordance with a nominal specification. The second transmit path can provide a second RF signal in accordance with an intermittent specification, in which the first and second RF signals are within the same transmit band. The switch element can provide the first RF signal as a transmit mode output in a first state and provide the second RF signal as the transmit mode output in a second state.

Abstract: A published event from a first content element executing within a framework may be detected. In response, a registry may be searched for one or more registered events that match the published event, and if a matching registered event is found, a second content element that registered said matching registered event may be instantiated to start executing within the framework. The second content element is dynamically aggregated into the framework based on the published event without the first content element needing to have previous knowledge of the second content element, and without the second content element needing to have previous knowledge of the first content element. The framework also does not need to be designed initially to deploy the second content element. Which one or more content elements to aggregate into the framework may be determined at run time rather than at design time.