| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device including monopole type respective large sized antenna elements that are self-erected without requiring many branch lines.SOLUTION: The antenna device includes: an excitation part having at least three excitation conductor posts, each one end of which is fixed to a base structure by sandwiching an insulator, and erected by supporting each other, and to which a high frequency signal of a predetermined frequency is supplied from each of the one end sides; and a grounded surface conductor provided in the surrounding of the excitation part.SELECTED DRAWING: Figure 1 |
