| 摘要 |
PROBLEM TO BE SOLVED: To suppress grating lobe even when sub-array arrangement spacings are cyclic. SOLUTION: The antenna device includes: element antennas 1; an attenuator 2 for giving excitation amplitude values different from one another to the respective element antennas 1; a first phase shifter 3 for changing excitation phases of the element antennas 1; a second phase shifter 6 for changing excitation phase of a sub-array 5 comprising the plurality of element antennas 1; a phase center operation circuit 11 for operating a barycentric coordinate of an amplitude distribution each sub-array 5 on the basis of excitation amplitude values given to the element antennas 1 and position coordinates of the elements antenna 1; and a second phase shifter control means 15 for calculating an excitation phase for performing beam scanning in the designated direction on the basis of the barycentric coordinate and controlling the second shifter 6 to give the calculated excitation phase by the sub-array. COPYRIGHT: (C)2011,JPO&INPIT |
