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: TEM horn array apertures are disclosed, comprises a plurality of stamped sheet segments interconnected to form an “egg crate” like array. Each stamped sheet comprises a plurality of TEM horn antennas with a series of cooperating slots, enabling the sheets to be assembled into an “egg crate” design that allows quick and inexpensive building of a TEM horn antenna array. Moreover, the stamped sheet segments are structurally and dimensionally stable, and thus the assembled array may be connected to a guide plane without the need for additional aligning or structural elements. A method of assembling the array is also disclosed.