| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device capable of flexibly adjusting each resonance frequency which is doubly resonated.SOLUTION: An antenna device includes: a substrate body 2; and a ground surface GND and first to fourth elements 3 to 6 pattern-formed on at least one of the surface and the rear face of the substrate body. The first element has: a first extension part E1; a second extension part E2; a third extension part E3; and a fourth extension part E4. The second element is extended from the middle of the second extension part to the ground surface. The first element has a phase adjustment part Ph annularly formed of the tip end side of the first extension part, the base end side of the second extension part, the third extension part, and the fourth extension part.SELECTED DRAWING: Figure 1 |
