FLAT MICROWAVE ANTENNA

The antenna, comprising stacked grounded metal plates with openings (1, 2, 3 ) and antenna layers (4, 5) with feed lines (4B, 5B), situated between grounde d metal plates. The openings in the grounded metal plates are arranged as matr ix of columns and rows. The ends of the feed lines (4D, 5D) are aligned with th e plate's openings (1A) in order to form radiating elements. The plate (7) is placed below the bottom grounded plate (3). The three-plate stack is arrange d as two antenna packages (Ap1 and Ap2). These packages include also a layer ( 8) comprising active devises for initial amplification of the received signal, which are connected to the groups of radiating elements (4D, 5D, 1A) through coaxial transitions (13). As well as a combiner block (9) is connected to th e active layer (8). The antenna layers (4,5) are arranged in subarrays and the antenna output is connected by a transition (12) to a standard twin Low Nois e Block.