| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a microwave(MW) sensor that can be improved in operational reliability by suppressing the interference between radio waves transmitted from a plurality of MW sensors although the radio waves are made to have the same frequency when the sensors are arranged in the same space or respectively arranged in adjacent spaces. SOLUTION: Anticrime sensor units 1A and 1B respectively installed to facing wall surfaces of a room are respectively provided with MW sensors. The extending directions of the antennas 31 of the sensors are inclined by 45 deg. from the vertical direction. In the state where the sensor units 1A and 1B are respectively installed to the wall surfaces, the antennas 31 of the sensors are twisted from each other by 90 deg. and the microwave polarizing planes of the antennas 31 are formed in orthogonal planes. Consequently, the interference between the microwaves is suppressed.</p> |
