| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio sensor device that can be used at an area of which a metal armored device is placed in the proximity and can communicate by suppressing the influence of such a device.SOLUTION: A radio sensor device 2 comprises: a flat plate-like antenna element 20 in which an electromagnetic radiation source 22 is formed on a radiation surface 211; and an enclosure 10 formed by dielectric material for housing a sensor unit 40, a radio circuit unit 30, the antenna element 20, and a feeder line 50. The antenna element 20 is placed in the center so that the radiation surface 211 is isolated from a radiation inner surface 112 of the enclosure 10, and a ground surface 212 is isolated from an attachment inner surface 122 of the enclosure 10. An air layer 61 is formed between the radiation surface 211 and the radiation inner surface 112.SELECTED DRAWING: Figure 1 |
