| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to prevent a communication network of the connection destination of a mobile terminal from automatically switching to a communication network having weak electric field intensity.SOLUTION: A radio wave blocking method for attaching a radio wave shutter 100 including a radio wave blocking sheet 110 for blocking a radio wave 500 other than a set transmission frequency in a state of covering a window 300 of a building includes the steps of: the radio wave blocking sheet 110 setting the transmission frequency on the basis of electric field intensity in a room 10 of a radio wave at a data communication frequency used in data communication and electric field intensity in the room 10 of a radio wave of a voice call frequency used in a voice call; and the radio wave blocking sheet 110 blocking the radio wave 500 other than the transmission frequency.SELECTED DRAWING: Figure 1 |
