| 摘要 |
PROBLEM TO BE SOLVED: To always transmit and receive radio waves in a steady state by arranging a laser beam generation means, a simulated antenna and the 1st and 2nd directive antennas at an orbit mobile object side and its opposite side respectively and correcting the focal point displacement occurred between the 1st and 2nd directive antennas based on the focal point displacement occurred at the simulated antenna of the laser beam. SOLUTION: A jib crane side directive antenna 3A and a laser beam generator 6 are arranged at a jib crane 1, and a plant building side directive antenna 3B is arranged on a directive antenna horizontal/vertical moving stage 10 of a plant building 2 to be opposite to the antenna 3A. Then a simulated antenna 7 is installed on the building 2 to be opposite to the generator 6 and then outputs the address information on a position that is irradiated by a laser beam 9. A control part drives the stage 10 based on the address information. Thus, the focal point displacement that is caused between both antennas 3A and 3B can be automatically corrected. |
