| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an antenna device capable of simultaneously receiving incoming waves in the two-dimensional directions and a plurality of frequencies. SOLUTION: The antenna device has a frequency variable local-oscillation signal generator 6 having a plurality of one-dimensional digital-beam forming antenna devices 5 with a plurality of linearly arrayed antennas 1, receiving frequency converters 2 frequency-converting signals received by the antennas 1, A/D converters 3 analog-digital converting outputs from the converters 2 and receiving beam formers 4 forming beams in one direction by conducting beam-formation loading to output signals from the A/D converters 3, being laminated and arranged in the directions crossing in the arrayed linear directions of the antennas 1 and being capable of changing the frequency of local oscillation signals in response to the frequency of signals received by the antenna devices 5.</p> |
