ANTENNA DEVICE AND RADOME

摘要

PROBLEM TO BE SOLVED: To control side lobe generated by an electric wave that cannot be received by a lens part.SOLUTION: An antenna device comprises: an antenna main body 2 that has a substrate 10 and an antenna element 11; a lens part 3 provided so as to be opposed to the antenna element 11 and that can transmit an electric wave emitted from the antenna element 11; and a cylindrical part 4 that is formed of a material transmitting the electric wave and that surrounds a space 7 provided between the antenna main body 2 and the lens part 3. The cylindrical part 4 has at an inner periphery an inside inclined plane 21 inclined to a facing direction of the antenna element 11 and the lens part 3.SELECTED DRAWING: Figure 1