| 摘要 |
PROBLEM TO BE SOLVED: To obtain an antenna device capable of preventing deterioration in communication performance caused by fallen snow without restriction in an arrangement direction of a heating wire and without preventing polarization radiation even for an antenna emitting a radio wave without going through a reflection plate.SOLUTION: An antenna device comprises: a power feeding part 3 applying a high-frequency voltage between a ground conductor 1 and a radiation conductor 2; a radome 4 arranged so as to cover the radiation conductor 2; and a heating wire 5 arranged to the radome 4, and having a high electric resistivity in such a degree that polarization radiation emitted from the radiation conductor 2 is not prevented. Since the heating wire 5 has the high electric resistivity in such a degree that polarization radiation emitted from the radiation conductor 2 is not prevented, the polarization radiation is not prevented even when the heating wire 5 is arranged so as to include a component not at a right angle to a polarization direction. Thereby, an antenna device that can prevent deterioration in communication performance caused by fallen snow without restriction in an arrangement direction of the heating wire 5 and without preventing polarization radiation even for an antenna emitting a radio wave without going through a reflection plate, can be obtained. |
