Abstract: An antenna array lattice design is disclosed, comprising a plurality of column and row members that interconnect using a tongue and groove feature to result in a stable lattice arrangement. Each row and column member comprises a plurality of slots configured to receive corresponding slots of opposing row or column members. The slots have surfaces that run approximately one half the length or width of the associated member. The slot surfaces have recesses machined therein, and the recesses are shaped to accept correspondingly shaped projections of the opposing row or column member. In one embodiment, the recesses are T-shaped, as are the associated projections. The slots acts as a guide for the row to column attachment during assembly, while the precise geometry of the groove design allows both tensile and compressive forces to be carried across the entire depth of the joint, thus maximizing the stiffness/weight ratio of the resulting array lattice structure.

Abstract: An arrangement for clamping a flat plate to a flat surface includes juxtaposing the plate to the flat surface. An axially-movable wedging element defining a surface fitted with wedges is fixed against motion in other than a direction of elongation, and is forced to move in the direction of elongation. The wedges are forced against a first spring beam to impart forces thereto. The forces are coupled from the first spring beam to a second spring beam by intermediary supports. The second spring beam bears against a surface of the flat plate to force the plate against the flat surface.

Abstract: An arrangement for clamping a flat plate to a flat surface includes juxtaposing the plate to the flat surface. An axially-movable wedging element defining a surface fitted with wedges is fixed against motion in other than a direction of elongation, and is forced to move in the direction of elongation. The wedges are forced against a first spring beam to impart forces thereto. The forces are coupled from the first spring beam to a second spring beam by intermediary supports. The second spring beam bears against a surface of the flat plate to force the plate against the flat surface.

Abstract: A quick fluid connector includes two mating portions. Leakage may occur during mating and demating. In order to contain such leakage, the mating portions of the connector are mounted on the distal end of a projecting boss and at the fundus of a matching well, respectively, so that the boss and well together define a chamber which surrounds the two mating portions of the quick connector. One or more drainage channels are coupled to the chamber to carry away leakage.

Abstract: An array antenna has antenna subarray elements connected to antenna ports of an array of planar beamformer boards. The beamforming elements are mounted in integrated circuits which bridge the junctions between adjacent circuit boards.

Abstract: An element support and thermal control arrangement for an active array antenna, preferably modular, using line-replaceable units (LRUs), includes a radiating-side liquid-cooled cold plate lying parallel with a liquid-cooled TR coldplate. Antenna elements are supported and cooled by the radiating cold plate, and a beamformer lies between the radiating and TR coldplates. A plurality of column coldplates are attached to the rear of the TR coldplate and define bays or volumes in which power LRUs can be fitted in thermal communication with the TR coldplate, the column coldplates, or both.

Abstract: An element support and thermal control arrangement for an active array antenna, preferably modular, using line-replaceable units (LRUs), includes a radiating-side liquid-cooled cold plate lying parallel with a liquid-cooled TR coldplate. Antenna elements are supported and cooled by the radiating cold plate, and a beamformer lies between the radiating and TR coldplates. A plurality of column coldplates are attached to the rear of the TR coldplate and define bays or volumes in which power LRUs can be fitted in thermal communication with the TR coldplate, the column coldplates, or both.

Abstract: An arrangement for clamping a flat plate to a flat surface includes juxtaposing the plate to the flat surface. An axially-movable wedging element defining a surface fitted with wedges is fixed against motion in other than a direction of elongation, and is forced to move in the direction of elongation. The wedges are forced against a first spring beam to impart forces thereto. The forces are coupled from the first spring beam to a second spring beam by intermediary supports. The second spring beam bears against a surface of the flat plate to force the plate against the flat surface.