| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device which can be shared by multifrequency while adjusting the beam width.SOLUTION: An antenna device includes a first radiation unit for radiating the electromagnetic waves in first frequency band, a first reflection unit for reflecting the electromagnetic waves in the first frequency band, a second radiation unit disposed on the opposite side from the first reflection unit with reference to the first radiation unit, and radiating the electromagnetic waves in the second frequency band, and a second reflection unit disposed between the first radiation unit and second radiation unit, and having a period array structure where a plurality of metal elements are arranged periodically, and transmitting the electromagnetic waves in the first frequency band, and reflecting the electromagnetic waves in the second frequency band.SELECTED DRAWING: Figure 1 |
