| 摘要 |
PURPOSE:To execute a beam scan at a wide angle, even in case when a size restriction of an antenna exists, and also to obtain a good monopulse pattern by providing plural stages of the first multibeam feeding circuits for forming two multibeams whose beam directions are different from each other, in parallel in the first direction, and providing the second multibeam feeding circuit for forming two multibeams in the second direction which is different from said first direction, from a signal from said multibeam. CONSTITUTION:A feed of the horizontal direction is executed by horizontal direction multibeam feeding circuit 211-21n, beams of the sum and the difference in a bearing surface are formed by hybrid comparators 221-22n, only a signal of the difference is synthesized by a vertical direction synthesizing circuit 23, and a difference signal DELTAAz in the bearing surface in an array antenna is obtained. On the other hand, a signal of only the sum of hybrid comparators 22a-22n is led out to a vertical direction multibeam feeding circuit 24, and a sum signal SIGMA of the array antenna and a difference signal DELTAEl in an elevation angle surface are obtained by a hybrid comparator 25 connected to two beam output terminals. |
