PURPOSE: A feed structure for monopulse antenna is provided to allow antenna design and manufacturing procedures to be easily performed and increase space utilization efficiency by connecting two feed waveguides in a straight manner. CONSTITUTION: A feed structure comprises an antenna body separated into a plurality of radiating surfaces; a radiating waveguide disposed at the front surface of the antenna body, and which has a plurality of radiating elements having a predetermined size and which are arranged at a predetermined spacing so as to radiate or receive power; and a plurality of feed waveguides(55,65) installed at each radiating surface at the rear of the antenna body, and which has a plurality of slot-shaped feeder elements so as to feed power to radiating elements. Feed waveguides are interconnected in a straight manner at the connection portion of radiating surfaces. Feed waveguides have last feeder elements located at the portion connecting two feed waveguides, wherein last feed element are tilted in opposite direction.
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