A receiver front end capable of receiving and processing intraband non-contiguous carrier aggregate (CA) signals using multiple low noise amplifiers (LNAs) is disclosed herein. A cascode having a common source input stage and a common gate output stage can be turned on or off using the gate of the output stage. A first switch is provided that allows a connection to be either established or broken between the source terminal of the input stage of each cascode. Further switches used for switching degeneration inductors, gate/sources caps and gate to ground caps for each legs can be used to further improve the matching performance of the invention.

A low NOx burner has a housing that includes a burner head defining a gas manifold and a primary flame zone downstream of the burner head. The burner has a gas inlet for receiving gas. Flow-through air vents are disposed around a center of the burner head and extending through the burner head thereby enabling cold core air to flow from an annular core space upstream of the burner head to the primary flame zone downstream of the burner head. The burner also includes a plurality of premix air vents in fluid communication with the manifold for premixing air and gas within the manifold and for emitting premixed air and gas into the primary flame zone. A plurality of staging pipes extend from the manifold into the primary flame zone for conveying gas into the primary flame zone. The burner includes an ignition device extending into the primary flame zone.

The invention relates to a gaseous fuel (including all mixtures thereof) burner structure, characterized in that it comprises: a housing defining a distal flame outlet end and a proximal gaseous fuel and air supply end, both ends having covers; a pressurized-air inlet arranged in the housing close to the proximal end, defining an inner pressurized-air-supply chamber; a pressurized-gaseous-fuel-supply duct arranged in the center, housed in a first mixing chamber and provided with a plurality of openings for the outflow of the gaseous fuel to said first mixing chamber, said first mixing chamber also comprising a plurality of openings for supplying pressurized air axially and radially; an igniter arranged inside said first mixing chamber for a first combustion; a second, over-mixing chamber arranged colinearly with said first chamber, the end of the fuel duct comprising a cover provided with openings via which gaseous fuel is axially supplied to said second, over-mixing chamber, and the wall of said second chamber comprising openings via which pressurized air is radially supplied, where a second stage of the combustion process is carried out; and a third, conical flame-formation chamber colinearly connected to the end of said second, over-mixing chamber.

A combustion burner 1 includes a fuel nozzle 2 that injects fuel gas prepared by mixing solid fuel and primary air, secondary air nozzles 3, 4 that inject secondary air from the outer periphery of the fuel nozzle 2, and a flame holder 5 that is arranged in an opening of the fuel nozzle 2. In the combustion burner 1, the flame holder 5 has a splitting shape that widens in the flow direction of the fuel gas. When seen in cross section along a direction in which the flame holder 5 widens, the cross section passing through the central axis of the fuel nozzle 2, a maximum distance h from the central axis of the fuel nozzle 2 to the widened end of the flame holder 5 and an inside diameter r of the opening 21 of the fuel nozzle 2 satisfy h/(r/2)<0.6.

The invention relates to a burner with a refractory burner body 1, 2, 3 for burning liquid or aerosol fuels, in particular, gaseous fuels. With the aim of reducing NO.sub.x emissions, the burner body comprises a gas nozzle 7, 9, 10, 11 and a plurality of air nozzles 4, 6, which are at least partially formed as integral mouldings in the burner body and flow out on a front side 16 of the burner body. Here, the air nozzles are symmetrically arranged around the gas nozzle and diverge at an angle to the gas nozzle. Likewise, the invention relates to a method for burning liquid or aerosol fuels, in particular, gaseous fuels with reduced NO.sub.x emissions.

Gas distribution component for a burner, comprising an oxidant inlet, for introducing an oxidant flow into the burner; an oxidant inlet channel, in fluid connection with the oxidant inlet; a diffusion/buffering chamber, providing a space for buffering and diffusion of the oxidant after the oxidant flows out of the oxidant inlet channel, and connected to oxidant delivery components, wherein multiple through-holes are provided on a wall of the oxidant inlet channel that is adjacent to the diffusion/buffering chamber, the gas distribution component being easy to operate, with no need to configure a complex valve structure, thereby greatly reducing manufacturing costs, and also achieving the effects of being convenient to use and maintain, reducing the pressure value requirement for an upstream gas source, and reducing the impact of gas source fluctuation on the combustion effect.

A burner assembly combines oxygen and fuel to produce a flame. The burner assembly includes an oxygen supply tube adapted to receive a stream of oxygen and a solid fuel conduit arranged to extend through the oxygen tube to convey a stream of fluidized, pulverized, solid fuel into a flame chamber. Oxygen flowing through the oxygen supply tube passes generally tangentially through a first set of oxygen-injection holes formed in the solid fuel conduit and off-tangentially from a second set of oxygen-injection holes formed in the solid fuel conduit and then mixes with fluidized, pulverized, solid fuel passing through the solid fuel conduit to create an oxygen-fuel mixture in a downstream portion of the solid fuel conduit. This mixture is discharged into a flame chamber and ignited in the flame chamber to produce a flame.

The present invention discloses a novel apparatus and way for controlling a velocity of a fuel-air mixture entering a gas turbine combustion system. The apparatus comprises a hemispherical dome assembly which directs a fuel-air mixture along a portion of the outer wall of a combustion liner and turns the fuel-air mixture to enter the combustion liner in a manner coaxial to the combustor axis and radially outward of a pilot fuel nozzle so as to regulate the velocity of the fuel-air mixture.

A burner assembly combines oxygen and fuel to produce a flame. The burner assembly includes an oxygen supply tube adapted to receive a stream of oxygen and a solid fuel conduit arranged to extend through the oxygen tube to convey a stream of fluidized, pulverized, solid fuel into a flame chamber. Oxygen flowing through the oxygen supply tube passes generally tangentially through a first set of oxygen-injection holes formed in the solid fuel conduit and off-tangentially from a second set of oxygen-injection holes formed in the solid fuel conduit and then mixes with fluidized, pulverized, solid fuel passing through the solid fuel conduit to create an oxygen-fuel mixture in a downstream portion of the solid fuel conduit. This mixture is discharged into a flame chamber and ignited in the flame chamber to produce a flame.

An oxy-gaseous fuel burner (400, 500) or a solid fuel burner (700) having an annular cavity (404, 504, 704) upstream from and proximate to an outlet plane (416, 516, 716) and a converging (434, 734) or converging-diverging nozzle (537) located upstream from and proximal to the cavity (404, 504, 704). The solid fuel burner (700) also is preferably operated so that the velocity of gas exiting a second annulus (730) is less than the velocity of gas exiting a central conduit (710).