| 摘要 |
PROBLEM TO BE SOLVED: To execute optionally extension of an azimuth detection range in the phase mono-pulse antenna system, optimization of antenna directivity and revision of a characteristic. SOLUTION: The antenna system has two antennas 21, 22 where a plurality of antenna elements are configured with arrangement of a comb-line (or in one column), and the antennas 21, 22 are placed opposite to each other in a way that the lengthwise directions of comb teeth (or columnar directions) are inparallel with each other and the phase centers are deviated by a prescribed amount in the lengthwise directions of comb teeth. Then the lengthwise directions of comb teeth (or columnar directions) of the comb lines of the array antennas 21, 22 are placed in parallel with an azimuth angle detection plane of the antenna system. Thus the phase center interval L0 is set without being affected by the interval of the antenna elements 13, the size and number of the elements 13 or the like by shifting optionally the array antennas 21, 22 in the lengthwise directions of comb teeth to detect an azimuth angle. Furthermore, only a phase difference within an azimuth angle detection plane can be detected by eliminating a deviation of the phase center in other directions than the azimuth angle detection plane of the array antennas 21, 22.
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