| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device capable of easily changing the directivity of radio wave with a structure of low cost.SOLUTION: The antenna device includes: a radio module 10 having an antenna element 11 disposed on the upper face thereof, which operates with a millimetric wave; a module base plate 12 for a multilayer wiring mounted with the radio module 10 thereon; and a metal plate 13 of a length of 1/10 or more of operation wavelength, which is disposed in a vertical direction adjacent to the antenna element 11. |
