| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication antenna system that can receive a radio wave from a GPS satellite, communicate with a GPS base station and conduct transmission reception of data to/from a master station in an excellent way. SOLUTION: The communication antenna system is provided with an antenna container case 1 made of a plastic material long in the axial direction, a GPS satellite radio wave reception antenna 7 that is mounted on a mount plate 4 fitted to an uppermost position of the antenna container case 1 via a support base 6, and an inter-GPS-base station communication antenna 10 and a data transmission antenna 11 fitted respectively to a mount plate 5 mounted on a lower part in the antenna container case 1.
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