| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that an installation position for fixing a radio apparatus on a structure cannot be easily adjusted. Ž<P>SOLUTION: A rail is fixed to the structure and a movable unit is arranged so that a radio unit can be moved on the rail, and the position of an antenna can be adjusted to a radio signal wavelength or longer. Consequently, the problem for adjusting the position of the antenna can be solved by the simple constitution. Since the position of the antenna can be adjusted to the radio signal wavelength or longer in the constitution, an advantage that the radio apparatus can be easily installed on a suitable position can be obtained. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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