| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna which suppresses increase in size and includes a horizontal polarized antenna in addition to an array antenna, and in which the horizontal polarized antenna has less variation in gains within a range of a spread angle of 180 degrees and prevents generation of a dead zone.SOLUTION: An antenna including an array antenna in which a circular ground plate 17 is arranged on a tabular dielectric substrate 19, and driven elements and non-driven elements are provided on the circular ground plate 17 in an insulated manner, comprises a linear antenna 20 arranged on the dielectric substrate 19 and in plane with the circular ground plate 17 at a portion where the circular ground plate 17 is not arranged. The linear antenna 20 is L-shaped and has a gap with the circular ground plate 17, the size, a stroke width and an orientation which satisfy predetermined conditions. |
