摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device capable of performing beam scanning with simple configuration at a low cost.SOLUTION: An antenna device 1 includes a horn antenna 10 having a pre-defined directivity, and a metal plate lens 20 having a plurality of metal plates 21 arranged at regular intervals along the electric field surface of radio waves transmitted and received by the horn antenna 10, and rotatable around an axis AX set at an end of the metal plate 21 facing the horn antenna 10 located in a direction where the intensity of radio waves transmitted from the horn antenna 10 becomes highest.SELECTED DRAWING: Figure 5 |