| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device that has high mechanical strength at a connection region of tri-plate lines, provides for ease of assembly, and keeps an electrical characteristic intact at the connection region.SOLUTION: The antenna device has a first tri-plate line 4a and one or more second tri-plate lines 4b connected crosswise to the first tri-plate line 4a. As to a central conductor 2 of the second tri-plate line 4b, a tip end portion thereof is extended out of ground plates 3b, and the tip end portion is hooked to form a hook portion 6. The central conductor 2 of the second tri-plate line 4b is inserted in a through hole 41 formed in a ground plate 3a, and the hook portion 6 is locked to a central conductor 2 of the first tri-plate line 4a. A conductive member 10 electrically connected to two ground plates 3a of the first tri-plate line 4a is disposed around the central conductor 2 of the second tri-plate line 4b inserted in the first tri-plate line 4a. |
