Abstract: A radio frequency (RF) amplifier circuit includes a field effect transistor (FET) (e.g., a FET belonging to a III-V FET enhancement group), where the FET includes a gate terminal coupled to an RF input node. The circuit further includes a prematch and biasing network coupled between a bias voltage node and the RF input node. The prematch and biasing network includes a nonlinear gate current blocking device configured to block a current from flowing between the bias voltage node and the RF input node.

Abstract: An embodiment of an amplifier includes a first amplifier with a first output terminal, a second amplifier with a second output terminal, and a plurality of microstrip transmission lines electrically connected to the amplifiers. The transmission lines include an impedance inverter line electrically connected between the first and second output terminals, and an output line electrically connected between the second output terminal and an output of the amplifier, where the output line forms a portion of an output impedance transformer. The amplifier also includes a directional coupler formed from a main line and a coupled line positioned in proximity to the main line, where the main line is formed from a portion of one of the transmission lines. The amplifier may also include a module substrate with a plurality of metal layers, where the main line and the coupled line are formed from different portions of the metal layers.

Abstract: A highly efficient, Z-selective ring-closing metathesis system for the formation of macrocycles using a stereoretentive, ruthenium-based catalyst supported by a dithiolate ligand is reported. This catalyst is demonstrated to be remarkably active as observed in initiation experiments showing complete catalyst initiation at ?20° C. within 10 min. Using easily accessible diene starting materials bearing a Z-olefin moiety, macrocyclization reactions generated products with significantly higher Z-selectivity in appreciably shorter reaction times, in higher yield, and with much lower catalyst loadings than in previously reported systems. Macrocyclic lactones ranging in size from twelve-membered to seventeen-membered rings are synthesized in moderate to high yields (68-79% yield) with excellent Z-selectivity (95%-99% Z).

Abstract: An embodiment of an amplifier includes a first amplifier with a first output terminal, a second amplifier with a second output terminal, and a plurality of microstrip transmission lines electrically connected to the amplifiers. The transmission lines include an impedance inverter line electrically connected between the first and second output terminals, and an output line electrically connected between the second output terminal and an output of the amplifier, where the output line forms a portion of an output impedance transformer. The amplifier also includes a directional coupler formed from a main line and a coupled line positioned in proximity to the main line, where the main line is formed from a portion of one of the transmission lines. The amplifier may also include a module substrate with a plurality of metal layers, where the main line and the coupled line are formed from different portions of the metal layers.

Abstract: An information handling system, includes a server rack including a first communication device. The server rack has a mounting flange with a plurality of mounting holes. The information handling system also includes a server installed in the server rack and secured to the mounting flange via a first mounting hole of the plurality of mounting holes. The server includes a second communication device, that is coupled to the first communication device via a second mounting hole of the plurality of mounting holes.

Abstract: A structural support system, for a vehicle having a central axis extending from a front of the vehicle to a rear of the vehicle, includes a radiator cross member, a lower load beam having a rearward end coupled to a frame of the vehicle, and a forward end coupled to the radiator cross member, the lower load beam oriented at an angle relative to the central axis and extending outwardly as the lower load beam extends toward the front of the vehicle, a front end module (FEM) coupled to the radiator cross member, and an impact block coupled to a transmission of the vehicle. During an impact event where an object impacts the FEM, the FEM and the radiator cross member are configured to absorb an impact load resulting from the impact event and bend rearward and inboard toward the transmission.

Abstract: Embodiments of circuits for use with an amplifier that includes multiple amplifier paths include a first circuit and a second circuit in parallel with the first circuit. The first circuit includes a first input coupled to a first power divider output, a first output coupled to a first amplifier path of the multiple amplifier paths, and a first adjustable phase shifter and a first attenuator series coupled between the first input and the first output. The second circuit includes a second input coupled to a second power divider output, a second output coupled to a second amplifier path of the multiple amplifier paths, and a second adjustable phase shifter coupled between the second input and the second output.

Abstract: Embodiments of circuits for use with an amplifier that includes multiple amplifier paths include a first circuit and a second circuit in parallel with the first circuit. The first circuit includes a first input coupled to a first power divider output, a first output coupled to a first amplifier path of the multiple amplifier paths, and a first adjustable phase shifter and a first attenuator series coupled between the first input and the first output. The second circuit includes a second input coupled to a second power divider output, a second output coupled to a second amplifier path of the multiple amplifier paths, and a second adjustable phase shifter coupled between the second input and the second output.

Abstract: A structural support system, for a vehicle having a central axis extending from a front of the vehicle to a rear of the vehicle, includes a radiator cross member, a lower load beam having a rearward end coupled to a frame of the vehicle, and a forward end coupled to the radiator cross member, the lower load beam oriented at an angle relative to the central axis and extending outwardly as the lower load beam extends toward the front of the vehicle, a front end module (FEM) coupled to the radiator cross member, and an impact block coupled to a transmission of the vehicle. During an impact event where an object impacts the FEM, the FEM and the radiator cross member are configured to absorb an impact load resulting from the impact event and bend rearward and inboard toward the transmission.

Abstract: A server rack includes a rack space including a plurality of rack units for receiving equipment, an aggregator module, and a plurality of management ports. Each management port is coupled to the aggregator, uniquely associated with one of the plurality of rack units, and collocated with the associated rack unit. The aggregator module is operable to determine which rack unit of the plurality of rack units that a first piece of equipment is installed into, based upon a first management port of the first piece of equipment being coupled to a second management port of the plurality of management ports.

Abstract: An ablation apparatus for creating a lesion in target tissue, the ablation apparatus having an ablation shaft including a handle, a first portion, an ablation portion, distal tip, at least one ablation energy delivery lumen, at least one ablation energy return lumen, and a stylet lumen that extends substantially along a length of the ablation shaft from the handle to at least the ablation portion. The ablation apparatus also includes a stylet that is capable of being inserted into the stylet lumen where the stylet is made of a shape-memory material.

Abstract: Embodiments of circuits for use with an amplifier that includes multiple amplifier paths include a first circuit and a second circuit in parallel with the first circuit. The first circuit includes a first input coupled to a first power divider output, a first output coupled to a first amplifier path of the multiple amplifier paths, and a first adjustable phase shifter and a first attenuator series coupled between the first input and the first output. The second circuit includes a second input coupled to a second power divider output, a second output coupled to a second amplifier path of the multiple amplifier paths, and a second adjustable phase shifter coupled between the second input and the second output.

Abstract: This invention relates generally to metathesis catalysts and the use of such catalysts in the metathesis of olefins and olefin compounds, more particularly, in the use of such catalysts in Z and E selective olefin metathesis reactions. The invention has utility in the fields of organometallics and organic synthesis.

Abstract: A Doherty amplifier is able to enhance efficiency in low-power and high-power RF communication states by enabling carrier and peaking amplifiers as required, and controlling bias modulation, depending on traffic loading levels in each of a set of consecutive communications timeslots. For example, if, in a low-power state, traffic loading levels do not exceed a relatively lower threshold in a communications timeslot, carrier amplifiers are selectively enabled as needed, peaking amplifiers are not enabled, and carrier amplifier bias levels are kept substantially constant. If, in an intermediate-power state, the lower threshold is exceeded but a relatively higher threshold is not exceeded, all carrier amplifiers are enabled, peaking amplifiers are selectively enabled, and bias levels are kept substantially constant. If, in a high-power state, the higher threshold is exceeded, all carrier and peaking amplifiers can be enabled, and the peaking amplifier bias tracks the RF envelope of the received RF signal.

Abstract: A server rack includes a mapping module having management ports that are each uniquely associated with and collocated with a rack unit of the server rack, a server installed in a rack unit of the server rack having a host port and a management controller coupled to a management port, and a rack switch including a first switch port coupled to the host port. The management module provides an indication to the mapping module that the host port is an active port, and the mapping module directs the rack switch to query the switch port to determine if the switch port is coupled to the active port in response to receiving the indication, receives a second indication that the switch port is coupled to the active port, and provides a network map for the server rack that indicates that the host port is coupled to the switch port.

Abstract: Server information handling system deployment and maintenance is enhanced with automated trouble ticket generation at a mobile telephone through an NFC transaction with a management controller. NFC transactions coordinate authorization for replacement component installation and server information handling system replacement. In one embodiment, a bezel includes an NFC device that interfaces with a management controller and stores configuration information to aid installation of replacement server information handling systems in the event of a system failure. A back-up battery provides power to an NFC support circuit that stores fault codes detected by the management controller so that fault codes are available during management controller failures. In one embodiment, contact information provided from a mobile telephone through an NFC transaction is used by the management controller to notify the mobile telephone of the state of management functions initiated by the mobile telephone with the NFC transaction.

Abstract: A floor tile for a data center floor includes a memory device and a tile management controller coupled to the memory device. The tile management controller receives configuration information for a server rack located on the floor tile and stores the configuration information in the memory device.

Abstract: Embodiments of circuits for use with an amplifier that includes multiple amplifier paths include a first circuit and a second circuit in parallel with the first circuit. The first circuit includes a first input coupled to a first power divider output, a first output coupled to a first amplifier path of the multiple amplifier paths, and a first adjustable phase shifter and a first attenuator series coupled between the first input and the first output. The second circuit includes a second input coupled to a second power divider output, a second output coupled to a second amplifier path of the multiple amplifier paths, and a second adjustable phase shifter coupled between the second input and the second output.

Abstract: A data center including a data center management controller and a plurality of floor tiles. Each floor tile includes a tile management controller coupled to the data center management controller. The data center management controller aggregates floor tile information from each floor tile and provides floor tile configuration information to each floor tile.

Abstract: An embodiment of an amplifier system includes a modifiable signal adjustment device with an RF signal adjustment circuit coupled between first and second nodes. The RF signal adjustment circuit includes an adjustable phase shifter and an adjustable attenuator coupled in series with each other. The device also includes a memory and a controller circuit. The controller circuit retrieves a phase shift value and an attenuation value from the memory. The controller circuit then controls the adjustable phase shifter to apply a phase shift corresponding to the phase shift value to an input RF signal received at the first node, and controls the adjustable attenuator to apply an attenuation corresponding to the attenuation value to the input RF signal. Applying the phase shift and the attenuation results in an output RF signal at the second node.