| 摘要 |
PROBLEM TO BE SOLVED: To prevent an antenna characteristic (gain) from notably declining in a low frequency region when an orientation direction is adjusted by the phase difference at the time of combination in an antenna device that comprises a pair of antenna elements made up of slot antennas and is configured to combine output from the respective antenna elements.SOLUTION: Reflectors 14, 24 of a pair of antenna elements 10, 20 constituting one part of an antenna device are each provided with plate-like shielding parts 18, 28 protruded toward radiators 12, 22 from one side of adjacent antenna element 24, 14 sides. Then, the height h of the shielding parts 18, 28 from the plate surfaces of the reflectors is set such that the isolation between the antenna elements 10, 20 becomes larger at the lower frequency side of the frequency region of a transmission and reception object radio wave. |
