Abstract: A light-weight, air-cooled transmit/receive unit is provided, including a first external cover member, an opposed second external cover member, and a central housing unit, including thermal management means, interposed between the first and second external cover members. A transmit/receive circuit board, including components and an integrated and common radiating element for at least one channel, is interposed between a first surface of the central housing unit and the first external cover member, and a controller circuit board and a power converter circuit board are interposed between an opposed second surface of the central housing unit and the second external cover member.

Abstract: A light-weight, air-cooled transmit/receive unit is provided, including a first external cover member, an opposed second external cover member, and a central housing unit, including thermal management means, interposed between the first and second external cover members. A transmit/receive circuit board, including components and an integrated and common radiating element for at least one channel, is interposed between a first surface of the central housing unit and the first external cover member, and a controller circuit board and a power converter circuit board are interposed between an opposed second surface of the central housing unit and the second external cover member.

Abstract: There is provided a heat dissipation device comprising at least one inlet plenum, at least one outlet plenum and chambers, in which the chambers communicate directly with the inlet plenum and with the outlet plenum. Also provided is a heat dissipation device comprising at least two inlet plenums, at least two outlet plenums and at least two chambers, the first chamber communicating directly with a first inlet plenum and a first outlet plenum, the second chamber communicating directly with a second inlet plenum and a second outlet plenum. Also provided are methods of dissipating heat, comprising passing fluid across and/or through such devices. Also provided are radar antennas comprising radar electronic components mounted on such devices.

Abstract: A line-replaceable unit for a phased array antenna including a thermally conductive housing having a front face and an opposed rear face, at least one open-ended waveguide extending through the housing from the front face to the rear face, at least one first radiating element including the waveguide and adapted to emit energy in a first frequency band; and at least one second radiating element positioned on the front face of the housing and adapted to emit energy in a second frequency band distinct from the first frequency band. The waveguide is dimensioned to pass energy in the first frequency band and is exposed to the environment outside the housing at the front and rear faces to define a cooling duct passing through the housing.

Abstract: A method for attachment to an overhead crane for removing the bearing assembly from a vertical centrifugal pump system without removing the motor. The apparatus includes a rigid C-shaped frame which is attached by a pulley to an overhead crane and also includes a pivotal attachment on the opposite end of the frame which is removably connected to the bearing assembly. Intermediate and vertically aligned with the ends of the frame is a horizontal displacement control member which is removably connected to the bearing assembly at a point vertically above the pivotal attachment. Horizontal displacement of the horizontal displacement control member will cause a rotating of the bearing assembly about the pivotal attachment allowing clearance and lateral removal of the bearing assembly from the vertical pump system.

Abstract: An apparatus for attachment to an overhead crane for removing the bearing assembly from a vertical centrifugal pump system without removing the motor. The apparatus includes a rigid C-shaped frame which is attached by a pulley to an overhead crane and also includes a pivotal attachment on the opposite end of the frame which is removably connected to the bearing assembly. Intermediate and vertically aligned with the ends of the frame is a horizontal displacement control member which is removably connected to the bearing assembly at a point vertically above the pivotal attachment. Horizontal displacement of the horizontal displacement control member will cause a rotating of the bearing assembly about the pivotal attachment allowing clearance and lateral removal of the bearing assembly from the vertical pump system.