An antenna apparatus 1 includes a recess 3 formed in a part of a conveyance or a building, an antenna element 4 disposed in the recess 3, and a cover or an insulating material closing a mouth 3b of the recess 3. The recess 3 includes a bottom 3a, the mouth 3b and a side wall 3c connecting the bottom 3a and the mouth 3b, a shape of the recess 3 widens from the bottom 3a toward the mouth 3b, and the bottom 3a and the side wall 3c are made of a conductor. An array antenna configured to detect an incoming direction of a radio wave is formed by a plurality of antenna elements 4.
アンテナ装置
2020-11-11
Patent
Elektronische Ressource
Japanisch