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 glassmelting furnace is provided in which the burners are elevated above the glassmelt surface and are oriented at an angle upwards relative to the glassmelt surface.

Submerged combustion burners having improved fuel and oxidant mixing characteristics. Submerged combustion melters including the burners. Methods of using submerged combustion melters to melt glass-forming materials and produce molten glass.

Submerged combustion burner panels, submerged combustion melters including one or more of the panels, and methods of using the same. The burner panel includes a panel body including a fluid-cooled portion and a protective non-fluid cooled portion. An exterior surface defined by the fluid-cooled portion, and an interior surface defined by the protective non-fluid cooled portion, exterior and interior referring to an SCM in which the panel is installed. The fluid-cooled portion has at least one burner support passage of diameter (d1) extending from the exterior surface to a seam where the fluid-cooled and protective non-fluid cooled portions meet supporting at least one fluid-cooled SC burner having a fluid-cooled burner tip attached to a burner body protruding away from the seam. The protective non-fluid-cooled portion has a combustion products flow passage of diameter (d2)<(d1). The burner panels promote burner life and melter campaign length.

A roof mounted oxygen-fuel burner for a glass melting furnace can produce a variable moving or sweeping flame in the furnace and can also vary the flame shape. The burner has a housing having an oxygen inlet pipe coupled to an oxygen chamber and a fuel inlet pipe coupled to a fuel feeding crossover block. The fuel feeding block feeds fuel to a nozzle fuel port while the oxygen chamber feeds a plurality of nozzle oxygen ports which oxygen port outlets are angled toward the centralized fuel port outlet. A rotating impeller over the oxygen ports has a partial opening that causes a variable moving or sweeping flame in the burner as the impeller rotates. The impeller is also raised or lowered to control the flow of oxygen to the plurality of oxygen port outlets to control the shape of the burner flame.

Submerged combustion burners having improved fuel and oxidant mixing characteristics. Submerged combustion melters including the burners. Methods of using submerged combustion melters to melt glass-forming materials and produce molten glass.

The efficiency and output of glass furnace operation employing thermochemical regeneration is improved by controlling operation conditions over the feeding zone to reduce the difference between the temperature at the furnace crown within, and outside of, the feeding zone.

Submerged combustion burners having a burner body, a burner tip connected thereto, and a protective cap and/or cladding layer. Submerged combustion melters including the burners and methods of using them to produce molten glass. The burner body has an external conduit and first and second internal conduits substantially concentric therewith, forming first and second annuli for passing a cooling fluid therethrough. The burner tip body is connected to the burner body at ends of the external and second internal conduits. The burner tip and protective cap and/or cladding layer include a generally central flow passage for a combustible mixture, the flow passage defined by an inner wall of the burner tip and protective cap.

Submerged combustion burners having a burner body and a burner tip connected thereto. The burner body has an external conduit and first and second internal conduits substantially concentric therewith, forming first and second annuli for passing a cooling fluid therethrough. A burner tip body is connected to the burner body at ends of the external and second internal conduits. The burner tip includes a generally central flow passage for a combustible mixture, the flow passage defined by an inner wall of the burner tip. The burner tip further has an outer wall and a crown connecting the inner and outer walls. The inner and outer walls, and the crown are comprised of same or different materials having greater corrosion and/or fatigue resistance than at least the external burner conduit.

Processes and systems for producing glass fibers having regions devoid of glass using submerged combustion melters, including feeding a vitrifiable feed material into a feed inlet of a melting zone of a melter vessel, and heating the vitrifiable material with at least one burner directing combustion products of an oxidant and a first fuel into the melting zone under a level of the molten material in the zone. One or more of the burners is configured to impart heat and turbulence to the molten material, producing a turbulent molten material comprising a plurality of bubbles suspended in the molten material, the bubbles comprising at least some of the combustion products, and optionally other gas species introduced by the burners. The molten material and bubbles are drawn through a bushing fluidly connected to a forehearth to produce a glass fiber comprising a plurality of interior regions substantially devoid of glass.