| 摘要 |
PROBLEM TO BE SOLVED: To prevent a transmission fault in radio data communication which is executed by means of inputting electric wave, pick-up through the use of an antenna by providing a mesh-shaped antenna group which is formed in accordance with the wavelength of a frequency matched to be an object on the concrete wall and floor of a structure. SOLUTION: The antenna 1, constituted to be a mesh-shape, is buried in the concrete wall of the building at the time of constructing the structure, such as a building, and whole power feeding points 4 are drawn out to the inside of a room from the concrete wall. That is, the mesh-shaped antenna 1 group which is formed, matching with the wavelength of the frequency of object, is provided on the concrete wall and floor of the structure. Thus, the transmission fault in radio data communication is prevented. Moreover, a repeater is connected to the antenna 1 group at a transmission side, so that the transmission fault of radio data communication at a reception side can be surely prevented. |
